DELETED Makefile.in Index: Makefile.in ================================================================== --- Makefile.in +++ /dev/null @@ -1,439 +0,0 @@ -# Makefile.in -- -# -# This file is a Makefile for Sample TEA Extension. 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For additional information on SQLite see - - http://www.sqlite.org/ - - -UNIX BUILD -========== - -Building under most UNIX systems is easy, just run the configure script -and then run make. For more information about the build process, see -the tcl/unix/README file in the Tcl src dist. The following minimal -example will install the extension in the /opt/tcl directory. - - $ cd sqlite-*-tea - $ ./configure --prefix=/opt/tcl - $ make - $ make install - -WINDOWS BUILD -============= - -The recommended method to build extensions under windows is to use the -Msys + Mingw build process. This provides a Unix-style build while -generating native Windows binaries. Using the Msys + Mingw build tools -means that you can use the same configure script as per the Unix build -to create a Makefile. See the tcl/win/README file for the URL of -the Msys + Mingw download. - -If you have VC++ then you may wish to use the files in the win -subdirectory and build the extension using just VC++. 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Include these here. -#-------------------------------------------------------------------- - -AC_OUTPUT([Makefile pkgIndex.tcl]) DELETED doc/sqlite3.n Index: doc/sqlite3.n ================================================================== --- doc/sqlite3.n +++ /dev/null @@ -1,15 +0,0 @@ -.TH sqlite3 n 4.1 "Tcl-Extensions" -.HS sqlite3 tcl -.BS -.SH NAME -sqlite3 \- an interface to the SQLite3 database engine -.SH SYNOPSIS -\fBsqlite3\fI command_name ?filename?\fR -.br -.SH DESCRIPTION -SQLite3 is a self-contains, zero-configuration, transactional SQL database -engine. This extension provides an easy to use interface for accessing -SQLite database files from Tcl. -.PP -For full documentation see http://www.sqlite.org/ and -in particular http://www.sqlite.org/tclsqlite.html. DELETED generic/tclsqlite3.c Index: generic/tclsqlite3.c ================================================================== --- generic/tclsqlite3.c +++ /dev/null @@ -1,89591 +0,0 @@ -/****************************************************************************** -** This file is an amalgamation of many separate C source files from SQLite -** version 3.5.9. By combining all the individual C code files into this -** single large file, the entire code can be compiled as a one translation -** unit. This allows many compilers to do optimizations that would not be -** possible if the files were compiled separately. Performance improvements -** of 5% are more are commonly seen when SQLite is compiled as a single -** translation unit. -** -** This file is all you need to compile SQLite. To use SQLite in other -** programs, you need this file and the "sqlite3.h" header file that defines -** the programming interface to the SQLite library. (If you do not have -** the "sqlite3.h" header file at hand, you will find a copy in the first -** 5638 lines past this header comment.) Additional code files may be -** needed if you want a wrapper to interface SQLite with your choice of -** programming language. The code for the "sqlite3" command-line shell -** is also in a separate file. This file contains only code for the core -** SQLite library. -** -** This amalgamation was generated on 2008-05-14 16:30:52 UTC. -*/ -#define SQLITE_CORE 1 -#define SQLITE_AMALGAMATION 1 -#ifndef SQLITE_PRIVATE -# define SQLITE_PRIVATE static -#endif -#ifndef SQLITE_API -# define SQLITE_API -#endif -/************** Begin file sqliteInt.h ***************************************/ -/* -** 2001 September 15 -** -** The author disclaims copyright to this source code. In place of -** a legal notice, here is a blessing: -** -** May you do good and not evil. -** May you find forgiveness for yourself and forgive others. -** May you share freely, never taking more than you give. -** -************************************************************************* -** Internal interface definitions for SQLite. -** -** @(#) $Id: sqliteInt.h,v 1.704 2008/05/13 13:27:34 drh Exp $ -*/ -#ifndef _SQLITEINT_H_ -#define _SQLITEINT_H_ - -/* -** Include the configuration header output by 'configure' if we're using the -** autoconf-based build -*/ -#ifdef _HAVE_SQLITE_CONFIG_H -#include "config.h" -#endif - -/************** Include sqliteLimit.h in the middle of sqliteInt.h ***********/ -/************** Begin file sqliteLimit.h *************************************/ -/* -** 2007 May 7 -** -** The author disclaims copyright to this source code. In place of -** a legal notice, here is a blessing: -** -** May you do good and not evil. -** May you find forgiveness for yourself and forgive others. -** May you share freely, never taking more than you give. -** -************************************************************************* -** -** This file defines various limits of what SQLite can process. -** -** @(#) $Id: sqliteLimit.h,v 1.8 2008/03/26 15:56:22 drh Exp $ -*/ - -/* -** The maximum length of a TEXT or BLOB in bytes. This also -** limits the size of a row in a table or index. -** -** The hard limit is the ability of a 32-bit signed integer -** to count the size: 2^31-1 or 2147483647. -*/ -#ifndef SQLITE_MAX_LENGTH -# define SQLITE_MAX_LENGTH 1000000000 -#endif - -/* -** This is the maximum number of -** -** * Columns in a table -** * Columns in an index -** * Columns in a view -** * Terms in the SET clause of an UPDATE statement -** * Terms in the result set of a SELECT statement -** * Terms in the GROUP BY or ORDER BY clauses of a SELECT statement. -** * Terms in the VALUES clause of an INSERT statement -** -** The hard upper limit here is 32676. Most database people will -** tell you that in a well-normalized database, you usually should -** not have more than a dozen or so columns in any table. And if -** that is the case, there is no point in having more than a few -** dozen values in any of the other situations described above. -*/ -#ifndef SQLITE_MAX_COLUMN -# define SQLITE_MAX_COLUMN 2000 -#endif - -/* -** The maximum length of a single SQL statement in bytes. -** -** It used to be the case that setting this value to zero would -** turn the limit off. That is no longer true. It is not possible -** to turn this limit off. -*/ -#ifndef SQLITE_MAX_SQL_LENGTH -# define SQLITE_MAX_SQL_LENGTH 1000000000 -#endif - -/* -** The maximum depth of an expression tree. This is limited to -** some extent by SQLITE_MAX_SQL_LENGTH. But sometime you might -** want to place more severe limits on the complexity of an -** expression. -** -** A value of 0 used to mean that the limit was not enforced. -** But that is no longer true. The limit is now strictly enforced -** at all times. -*/ -#ifndef SQLITE_MAX_EXPR_DEPTH -# define SQLITE_MAX_EXPR_DEPTH 1000 -#endif - -/* -** The maximum number of terms in a compound SELECT statement. -** The code generator for compound SELECT statements does one -** level of recursion for each term. A stack overflow can result -** if the number of terms is too large. In practice, most SQL -** never has more than 3 or 4 terms. Use a value of 0 to disable -** any limit on the number of terms in a compount SELECT. -*/ -#ifndef SQLITE_MAX_COMPOUND_SELECT -# define SQLITE_MAX_COMPOUND_SELECT 500 -#endif - -/* -** The maximum number of opcodes in a VDBE program. -** Not currently enforced. -*/ -#ifndef SQLITE_MAX_VDBE_OP -# define SQLITE_MAX_VDBE_OP 25000 -#endif - -/* -** The maximum number of arguments to an SQL function. -*/ -#ifndef SQLITE_MAX_FUNCTION_ARG -# define SQLITE_MAX_FUNCTION_ARG 100 -#endif - -/* -** The maximum number of in-memory pages to use for the main database -** table and for temporary tables. The SQLITE_DEFAULT_CACHE_SIZE -*/ -#ifndef SQLITE_DEFAULT_CACHE_SIZE -# define SQLITE_DEFAULT_CACHE_SIZE 2000 -#endif -#ifndef SQLITE_DEFAULT_TEMP_CACHE_SIZE -# define SQLITE_DEFAULT_TEMP_CACHE_SIZE 500 -#endif - -/* -** The maximum number of attached databases. This must be between 0 -** and 30. The upper bound on 30 is because a 32-bit integer bitmap -** is used internally to track attached databases. -*/ -#ifndef SQLITE_MAX_ATTACHED -# define SQLITE_MAX_ATTACHED 10 -#endif - - -/* -** The maximum value of a ?nnn wildcard that the parser will accept. -*/ -#ifndef SQLITE_MAX_VARIABLE_NUMBER -# define SQLITE_MAX_VARIABLE_NUMBER 999 -#endif - -/* Maximum page size. The upper bound on this value is 32768. This a limit -** imposed by the necessity of storing the value in a 2-byte unsigned integer -** and the fact that the page size must be a power of 2. -*/ -#ifndef SQLITE_MAX_PAGE_SIZE -# define SQLITE_MAX_PAGE_SIZE 32768 -#endif - - -/* -** The default size of a database page. -*/ -#ifndef SQLITE_DEFAULT_PAGE_SIZE -# define SQLITE_DEFAULT_PAGE_SIZE 1024 -#endif -#if SQLITE_DEFAULT_PAGE_SIZE>SQLITE_MAX_PAGE_SIZE -# undef SQLITE_DEFAULT_PAGE_SIZE -# define SQLITE_DEFAULT_PAGE_SIZE SQLITE_MAX_PAGE_SIZE -#endif - -/* -** Ordinarily, if no value is explicitly provided, SQLite creates databases -** with page size SQLITE_DEFAULT_PAGE_SIZE. However, based on certain -** device characteristics (sector-size and atomic write() support), -** SQLite may choose a larger value. This constant is the maximum value -** SQLite will choose on its own. -*/ -#ifndef SQLITE_MAX_DEFAULT_PAGE_SIZE -# define SQLITE_MAX_DEFAULT_PAGE_SIZE 8192 -#endif -#if SQLITE_MAX_DEFAULT_PAGE_SIZE>SQLITE_MAX_PAGE_SIZE -# undef SQLITE_MAX_DEFAULT_PAGE_SIZE -# define SQLITE_MAX_DEFAULT_PAGE_SIZE SQLITE_MAX_PAGE_SIZE -#endif - - -/* -** Maximum number of pages in one database file. -** -** This is really just the default value for the max_page_count pragma. -** This value can be lowered (or raised) at run-time using that the -** max_page_count macro. -*/ -#ifndef SQLITE_MAX_PAGE_COUNT -# define SQLITE_MAX_PAGE_COUNT 1073741823 -#endif - -/* -** Maximum length (in bytes) of the pattern in a LIKE or GLOB -** operator. -*/ -#ifndef SQLITE_MAX_LIKE_PATTERN_LENGTH -# define SQLITE_MAX_LIKE_PATTERN_LENGTH 50000 -#endif - -/************** End of sqliteLimit.h *****************************************/ -/************** Continuing where we left off in sqliteInt.h ******************/ - -/* Disable nuisance warnings on Borland compilers */ -#if defined(__BORLANDC__) -#pragma warn -rch /* unreachable code */ -#pragma warn -ccc /* Condition is always true or false */ -#pragma warn -aus /* Assigned value is never used */ -#pragma warn -csu /* Comparing signed and unsigned */ -#pragma warn -spa /* Suspicous pointer arithmetic */ -#endif - -/* Needed for various definitions... */ -#define _GNU_SOURCE - -/* -** Include standard header files as necessary -*/ -#ifdef HAVE_STDINT_H -#include -#endif -#ifdef HAVE_INTTYPES_H -#include -#endif - -/* -** A macro used to aid in coverage testing. When doing coverage -** testing, the condition inside the argument must be evaluated -** both true and false in order to get full branch coverage. -** This macro can be inserted to ensure adequate test coverage -** in places where simple condition/decision coverage is inadequate. -*/ -#ifdef SQLITE_COVERAGE_TEST -SQLITE_PRIVATE void sqlite3Coverage(int); -# define testcase(X) if( X ){ sqlite3Coverage(__LINE__); } -#else -# define testcase(X) -#endif - - -/* -** The macro unlikely() is a hint that surrounds a boolean -** expression that is usually false. Macro likely() surrounds -** a boolean expression that is usually true. GCC is able to -** use these hints to generate better code, sometimes. -*/ -#if defined(__GNUC__) && 0 -# define likely(X) __builtin_expect((X),1) -# define unlikely(X) __builtin_expect((X),0) -#else -# define likely(X) !!(X) -# define unlikely(X) !!(X) -#endif - - -/* -** These #defines should enable >2GB file support on Posix if the -** underlying operating system supports it. If the OS lacks -** large file support, or if the OS is windows, these should be no-ops. -** -** Ticket #2739: The _LARGEFILE_SOURCE macro must appear before any -** system #includes. Hence, this block of code must be the very first -** code in all source files. -** -** Large file support can be disabled using the -DSQLITE_DISABLE_LFS switch -** on the compiler command line. This is necessary if you are compiling -** on a recent machine (ex: RedHat 7.2) but you want your code to work -** on an older machine (ex: RedHat 6.0). If you compile on RedHat 7.2 -** without this option, LFS is enable. But LFS does not exist in the kernel -** in RedHat 6.0, so the code won't work. Hence, for maximum binary -** portability you should omit LFS. -** -** Similar is true for MacOS. LFS is only supported on MacOS 9 and later. -*/ -#ifndef SQLITE_DISABLE_LFS -# define _LARGE_FILE 1 -# ifndef _FILE_OFFSET_BITS -# define _FILE_OFFSET_BITS 64 -# endif -# define _LARGEFILE_SOURCE 1 -#endif - - -/* -** The SQLITE_THREADSAFE macro must be defined as either 0 or 1. -** Older versions of SQLite used an optional THREADSAFE macro. -** We support that for legacy -*/ -#if !defined(SQLITE_THREADSAFE) -#if defined(THREADSAFE) -# define SQLITE_THREADSAFE THREADSAFE -#else -# define SQLITE_THREADSAFE 1 -#endif -#endif - -/* -** Exactly one of the following macros must be defined in order to -** specify which memory allocation subsystem to use. -** -** SQLITE_SYSTEM_MALLOC // Use normal system malloc() -** SQLITE_MEMDEBUG // Debugging version of system malloc() -** SQLITE_MEMORY_SIZE // internal allocator #1 -** SQLITE_MMAP_HEAP_SIZE // internal mmap() allocator -** SQLITE_POW2_MEMORY_SIZE // internal power-of-two allocator -** -** If none of the above are defined, then set SQLITE_SYSTEM_MALLOC as -** the default. -*/ -#if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_MEMDEBUG)+\ - defined(SQLITE_MEMORY_SIZE)+defined(SQLITE_MMAP_HEAP_SIZE)+\ - defined(SQLITE_POW2_MEMORY_SIZE)>1 -# error "At most one of the following compile-time configuration options\ - is allows: SQLITE_SYSTEM_MALLOC, SQLITE_MEMDEBUG, SQLITE_MEMORY_SIZE,\ - SQLITE_MMAP_HEAP_SIZE, SQLITE_POW2_MEMORY_SIZE" -#endif -#if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_MEMDEBUG)+\ - defined(SQLITE_MEMORY_SIZE)+defined(SQLITE_MMAP_HEAP_SIZE)+\ - defined(SQLITE_POW2_MEMORY_SIZE)==0 -# define SQLITE_SYSTEM_MALLOC 1 -#endif - -/* -** If SQLITE_MALLOC_SOFT_LIMIT is defined, then try to keep the -** sizes of memory allocations below this value where possible. -*/ -#if defined(SQLITE_POW2_MEMORY_SIZE) && !defined(SQLITE_MALLOC_SOFT_LIMIT) -# define SQLITE_MALLOC_SOFT_LIMIT 1024 -#endif - -/* -** We need to define _XOPEN_SOURCE as follows in order to enable -** recursive mutexes on most unix systems. But Mac OS X is different. -** The _XOPEN_SOURCE define causes problems for Mac OS X we are told, -** so it is omitted there. See ticket #2673. -** -** Later we learn that _XOPEN_SOURCE is poorly or incorrectly -** implemented on some systems. So we avoid defining it at all -** if it is already defined or if it is unneeded because we are -** not doing a threadsafe build. Ticket #2681. -** -** See also ticket #2741. -*/ -#if !defined(_XOPEN_SOURCE) && !defined(__DARWIN__) && !defined(__APPLE__) && SQLITE_THREADSAFE -# define _XOPEN_SOURCE 500 /* Needed to enable pthread recursive mutexes */ -#endif - -#if defined(SQLITE_TCL) || defined(TCLSH) -# include -#endif - -/* -** Many people are failing to set -DNDEBUG=1 when compiling SQLite. -** Setting NDEBUG makes the code smaller and run faster. So the following -** lines are added to automatically set NDEBUG unless the -DSQLITE_DEBUG=1 -** option is set. Thus NDEBUG becomes an opt-in rather than an opt-out -** feature. -*/ -#if !defined(NDEBUG) && !defined(SQLITE_DEBUG) -# define NDEBUG 1 -#endif - -/************** Include sqlite3.h in the middle of sqliteInt.h ***************/ -/************** Begin file sqlite3.h *****************************************/ -/* -** 2001 September 15 -** -** The author disclaims copyright to this source code. In place of -** a legal notice, here is a blessing: -** -** May you do good and not evil. -** May you find forgiveness for yourself and forgive others. -** May you share freely, never taking more than you give. -** -************************************************************************* -** This header file defines the interface that the SQLite library -** presents to client programs. If a C-function, structure, datatype, -** or constant definition does not appear in this file, then it is -** not a published API of SQLite, is subject to change without -** notice, and should not be referenced by programs that use SQLite. -** -** Some of the definitions that are in this file are marked as -** "experimental". Experimental interfaces are normally new -** features recently added to SQLite. We do not anticipate changes -** to experimental interfaces but reserve to make minor changes if -** experience from use "in the wild" suggest such changes are prudent. -** -** The official C-language API documentation for SQLite is derived -** from comments in this file. This file is the authoritative source -** on how SQLite interfaces are suppose to operate. -** -** The name of this file under configuration management is "sqlite.h.in". -** The makefile makes some minor changes to this file (such as inserting -** the version number) and changes its name to "sqlite3.h" as -** part of the build process. -** -** @(#) $Id: sqlite.h.in,v 1.312 2008/05/12 12:39:56 drh Exp $ -*/ -#ifndef _SQLITE3_H_ -#define _SQLITE3_H_ -#include /* Needed for the definition of va_list */ - -/* -** Make sure we can call this stuff from C++. -*/ -#if 0 -extern "C" { -#endif - - -/* -** Add the ability to override 'extern' -*/ -#ifndef SQLITE_EXTERN -# define SQLITE_EXTERN extern -#endif - -/* -** Make sure these symbols where not defined by some previous header -** file. -*/ -#ifdef SQLITE_VERSION -# undef SQLITE_VERSION -#endif -#ifdef SQLITE_VERSION_NUMBER -# undef SQLITE_VERSION_NUMBER -#endif - -/* -** CAPI3REF: Compile-Time Library Version Numbers {F10010} -** -** The SQLITE_VERSION and SQLITE_VERSION_NUMBER #defines in -** the sqlite3.h file specify the version of SQLite with which -** that header file is associated. -** -** The "version" of SQLite is a string of the form "X.Y.Z". -** The phrase "alpha" or "beta" might be appended after the Z. -** The X value is major version number always 3 in SQLite3. -** The X value only changes when backwards compatibility is -** broken and we intend to never break -** backwards compatibility. The Y value is the minor version -** number and only changes when -** there are major feature enhancements that are forwards compatible -** but not backwards compatible. The Z value is release number -** and is incremented with -** each release but resets back to 0 when Y is incremented. -** -** See also: [sqlite3_libversion()] and [sqlite3_libversion_number()]. -** -** INVARIANTS: -** -** {F10011} The SQLITE_VERSION #define in the sqlite3.h header file -** evaluates to a string literal that is the SQLite version -** with which the header file is associated. -** -** {F10014} The SQLITE_VERSION_NUMBER #define resolves to an integer -** with the value (X*1000000 + Y*1000 + Z) where X, Y, and -** Z are the major version, minor version, and release number. -*/ -#define SQLITE_VERSION "3.5.9" -#define SQLITE_VERSION_NUMBER 3005009 - -/* -** CAPI3REF: Run-Time Library Version Numbers {F10020} -** KEYWORDS: sqlite3_version -** -** These features provide the same information as the [SQLITE_VERSION] -** and [SQLITE_VERSION_NUMBER] #defines in the header, but are associated -** with the library instead of the header file. Cautious programmers might -** include a check in their application to verify that -** sqlite3_libversion_number() always returns the value -** [SQLITE_VERSION_NUMBER]. -** -** The sqlite3_libversion() function returns the same information as is -** in the sqlite3_version[] string constant. The function is provided -** for use in DLLs since DLL users usually do not have direct access to string -** constants within the DLL. -** -** INVARIANTS: -** -** {F10021} The [sqlite3_libversion_number()] interface returns an integer -** equal to [SQLITE_VERSION_NUMBER]. -** -** {F10022} The [sqlite3_version] string constant contains the text of the -** [SQLITE_VERSION] string. -** -** {F10023} The [sqlite3_libversion()] function returns -** a pointer to the [sqlite3_version] string constant. -*/ -SQLITE_API const char sqlite3_version[]; -SQLITE_API const char *sqlite3_libversion(void); -SQLITE_API int sqlite3_libversion_number(void); - -/* -** CAPI3REF: Test To See If The Library Is Threadsafe {F10100} -** -** SQLite can be compiled with or without mutexes. When -** the SQLITE_THREADSAFE C preprocessor macro is true, mutexes -** are enabled and SQLite is threadsafe. When that macro is false, -** the mutexes are omitted. Without the mutexes, it is not safe -** to use SQLite from more than one thread. -** -** There is a measurable performance penalty for enabling mutexes. -** So if speed is of utmost importance, it makes sense to disable -** the mutexes. But for maximum safety, mutexes should be enabled. -** The default behavior is for mutexes to be enabled. -** -** This interface can be used by a program to make sure that the -** version of SQLite that it is linking against was compiled with -** the desired setting of the SQLITE_THREADSAFE macro. -** -** INVARIANTS: -** -** {F10101} The [sqlite3_threadsafe()] function returns nonzero if -** SQLite was compiled with its mutexes enabled or zero -** if SQLite was compiled with mutexes disabled. -*/ -SQLITE_API int sqlite3_threadsafe(void); - -/* -** CAPI3REF: Database Connection Handle {F12000} -** KEYWORDS: {database connection} {database connections} -** -** Each open SQLite database is represented by pointer to an instance of the -** opaque structure named "sqlite3". It is useful to think of an sqlite3 -** pointer as an object. The [sqlite3_open()], [sqlite3_open16()], and -** [sqlite3_open_v2()] interfaces are its constructors -** and [sqlite3_close()] is its destructor. There are many other interfaces -** (such as [sqlite3_prepare_v2()], [sqlite3_create_function()], and -** [sqlite3_busy_timeout()] to name but three) that are methods on this -** object. -*/ -typedef struct sqlite3 sqlite3; - - -/* -** CAPI3REF: 64-Bit Integer Types {F10200} -** KEYWORDS: sqlite_int64 sqlite_uint64 -** -** Because there is no cross-platform way to specify 64-bit integer types -** SQLite includes typedefs for 64-bit signed and unsigned integers. -** -** The sqlite3_int64 and sqlite3_uint64 are the preferred type -** definitions. The sqlite_int64 and sqlite_uint64 types are -** supported for backwards compatibility only. -** -** INVARIANTS: -** -** {F10201} The [sqlite_int64] and [sqlite3_int64] types specify a -** 64-bit signed integer. -** -** {F10202} The [sqlite_uint64] and [sqlite3_uint64] types specify -** a 64-bit unsigned integer. -*/ -#ifdef SQLITE_INT64_TYPE - typedef SQLITE_INT64_TYPE sqlite_int64; - typedef unsigned SQLITE_INT64_TYPE sqlite_uint64; -#elif defined(_MSC_VER) || defined(__BORLANDC__) - typedef __int64 sqlite_int64; - typedef unsigned __int64 sqlite_uint64; -#else - typedef long long int sqlite_int64; - typedef unsigned long long int sqlite_uint64; -#endif -typedef sqlite_int64 sqlite3_int64; -typedef sqlite_uint64 sqlite3_uint64; - -/* -** If compiling for a processor that lacks floating point support, -** substitute integer for floating-point -*/ -#ifdef SQLITE_OMIT_FLOATING_POINT -# define double sqlite3_int64 -#endif - -/* -** CAPI3REF: Closing A Database Connection {F12010} -** -** This routine is the destructor for the [sqlite3] object. -** -** Applications should [sqlite3_finalize | finalize] all -** [prepared statements] and -** [sqlite3_blob_close | close] all [sqlite3_blob | BLOBs] -** associated with the [sqlite3] object prior -** to attempting to close the [sqlite3] object. -** -** What happens to pending transactions? Are they -** rolled back, or abandoned? -** -** INVARIANTS: -** -** {F12011} The [sqlite3_close()] interface destroys an [sqlite3] object -** allocated by a prior call to [sqlite3_open()], -** [sqlite3_open16()], or [sqlite3_open_v2()]. -** -** {F12012} The [sqlite3_close()] function releases all memory used by the -** connection and closes all open files. -** -** {F12013} If the database connection contains -** [prepared statements] that have not been -** finalized by [sqlite3_finalize()], then [sqlite3_close()] -** returns [SQLITE_BUSY] and leaves the connection open. -** -** {F12014} Giving sqlite3_close() a NULL pointer is a harmless no-op. -** -** LIMITATIONS: -** -** {U12015} The parameter to [sqlite3_close()] must be an [sqlite3] object -** pointer previously obtained from [sqlite3_open()] or the -** equivalent, or NULL. -** -** {U12016} The parameter to [sqlite3_close()] must not have been previously -** closed. -*/ -SQLITE_API int sqlite3_close(sqlite3 *); - -/* -** The type for a callback function. -** This is legacy and deprecated. It is included for historical -** compatibility and is not documented. -*/ -typedef int (*sqlite3_callback)(void*,int,char**, char**); - -/* -** CAPI3REF: One-Step Query Execution Interface {F12100} -** -** The sqlite3_exec() interface is a convenient way of running -** one or more SQL statements without a lot of C code. The -** SQL statements are passed in as the second parameter to -** sqlite3_exec(). The statements are evaluated one by one -** until either an error or an interrupt is encountered or -** until they are all done. The 3rd parameter is an optional -** callback that is invoked once for each row of any query results -** produced by the SQL statements. The 5th parameter tells where -** to write any error messages. -** -** The sqlite3_exec() interface is implemented in terms of -** [sqlite3_prepare_v2()], [sqlite3_step()], and [sqlite3_finalize()]. -** The sqlite3_exec() routine does nothing that cannot be done -** by [sqlite3_prepare_v2()], [sqlite3_step()], and [sqlite3_finalize()]. -** The sqlite3_exec() is just a convenient wrapper. -** -** INVARIANTS: -** -** {F12101} The [sqlite3_exec()] interface evaluates zero or more UTF-8 -** encoded, semicolon-separated, SQL statements in the -** zero-terminated string of its 2nd parameter within the -** context of the [sqlite3] object given in the 1st parameter. -** -** {F12104} The return value of [sqlite3_exec()] is SQLITE_OK if all -** SQL statements run successfully. -** -** {F12105} The return value of [sqlite3_exec()] is an appropriate -** non-zero error code if any SQL statement fails. -** -** {F12107} If one or more of the SQL statements handed to [sqlite3_exec()] -** return results and the 3rd parameter is not NULL, then -** the callback function specified by the 3rd parameter is -** invoked once for each row of result. -** -** {F12110} If the callback returns a non-zero value then [sqlite3_exec()] -** will aborted the SQL statement it is currently evaluating, -** skip all subsequent SQL statements, and return [SQLITE_ABORT]. -** What happens to *errmsg here? Does the result code for -** sqlite3_errcode() get set? -** -** {F12113} The [sqlite3_exec()] routine will pass its 4th parameter through -** as the 1st parameter of the callback. -** -** {F12116} The [sqlite3_exec()] routine sets the 2nd parameter of its -** callback to be the number of columns in the current row of -** result. -** -** {F12119} The [sqlite3_exec()] routine sets the 3rd parameter of its -** callback to be an array of pointers to strings holding the -** values for each column in the current result set row as -** obtained from [sqlite3_column_text()]. -** -** {F12122} The [sqlite3_exec()] routine sets the 4th parameter of its -** callback to be an array of pointers to strings holding the -** names of result columns as obtained from [sqlite3_column_name()]. -** -** {F12125} If the 3rd parameter to [sqlite3_exec()] is NULL then -** [sqlite3_exec()] never invokes a callback. All query -** results are silently discarded. -** -** {F12128} If an error occurs while parsing or evaluating any of the SQL -** statements handed to [sqlite3_exec()] then [sqlite3_exec()] will -** return an [error code] other than [SQLITE_OK]. -** -** {F12131} If an error occurs while parsing or evaluating any of the SQL -** handed to [sqlite3_exec()] and if the 5th parameter (errmsg) -** to [sqlite3_exec()] is not NULL, then an error message is -** allocated using the equivalent of [sqlite3_mprintf()] and -** *errmsg is made to point to that message. -** -** {F12134} The [sqlite3_exec()] routine does not change the value of -** *errmsg if errmsg is NULL or if there are no errors. -** -** {F12137} The [sqlite3_exec()] function sets the error code and message -** accessible via [sqlite3_errcode()], [sqlite3_errmsg()], and -** [sqlite3_errmsg16()]. -** -** LIMITATIONS: -** -** {U12141} The first parameter to [sqlite3_exec()] must be an valid and open -** [database connection]. -** -** {U12142} The database connection must not be closed while -** [sqlite3_exec()] is running. -** -** {U12143} The calling function is should use [sqlite3_free()] to free -** the memory that *errmsg is left pointing at once the error -** message is no longer needed. -** -** {U12145} The SQL statement text in the 2nd parameter to [sqlite3_exec()] -** must remain unchanged while [sqlite3_exec()] is running. -*/ -SQLITE_API int sqlite3_exec( - sqlite3*, /* An open database */ - const char *sql, /* SQL to be evaluted */ - int (*callback)(void*,int,char**,char**), /* Callback function */ - void *, /* 1st argument to callback */ - char **errmsg /* Error msg written here */ -); - -/* -** CAPI3REF: Result Codes {F10210} -** KEYWORDS: SQLITE_OK {error code} {error codes} -** -** Many SQLite functions return an integer result code from the set shown -** here in order to indicates success or failure. -** -** See also: [SQLITE_IOERR_READ | extended result codes] -*/ -#define SQLITE_OK 0 /* Successful result */ -/* beginning-of-error-codes */ -#define SQLITE_ERROR 1 /* SQL error or missing database */ -#define SQLITE_INTERNAL 2 /* Internal logic error in SQLite */ -#define SQLITE_PERM 3 /* Access permission denied */ -#define SQLITE_ABORT 4 /* Callback routine requested an abort */ -#define SQLITE_BUSY 5 /* The database file is locked */ -#define SQLITE_LOCKED 6 /* A table in the database is locked */ -#define SQLITE_NOMEM 7 /* A malloc() failed */ -#define SQLITE_READONLY 8 /* Attempt to write a readonly database */ -#define SQLITE_INTERRUPT 9 /* Operation terminated by sqlite3_interrupt()*/ -#define SQLITE_IOERR 10 /* Some kind of disk I/O error occurred */ -#define SQLITE_CORRUPT 11 /* The database disk image is malformed */ -#define SQLITE_NOTFOUND 12 /* NOT USED. Table or record not found */ -#define SQLITE_FULL 13 /* Insertion failed because database is full */ -#define SQLITE_CANTOPEN 14 /* Unable to open the database file */ -#define SQLITE_PROTOCOL 15 /* NOT USED. Database lock protocol error */ -#define SQLITE_EMPTY 16 /* Database is empty */ -#define SQLITE_SCHEMA 17 /* The database schema changed */ -#define SQLITE_TOOBIG 18 /* String or BLOB exceeds size limit */ -#define SQLITE_CONSTRAINT 19 /* Abort due to constraint violation */ -#define SQLITE_MISMATCH 20 /* Data type mismatch */ -#define SQLITE_MISUSE 21 /* Library used incorrectly */ -#define SQLITE_NOLFS 22 /* Uses OS features not supported on host */ -#define SQLITE_AUTH 23 /* Authorization denied */ -#define SQLITE_FORMAT 24 /* Auxiliary database format error */ -#define SQLITE_RANGE 25 /* 2nd parameter to sqlite3_bind out of range */ -#define SQLITE_NOTADB 26 /* File opened that is not a database file */ -#define SQLITE_ROW 100 /* sqlite3_step() has another row ready */ -#define SQLITE_DONE 101 /* sqlite3_step() has finished executing */ -/* end-of-error-codes */ - -/* -** CAPI3REF: Extended Result Codes {F10220} -** KEYWORDS: {extended error code} {extended error codes} -** KEYWORDS: {extended result codes} -** -** In its default configuration, SQLite API routines return one of 26 integer -** [SQLITE_OK | result codes]. However, experience has shown that -** many of these result codes are too course-grained. They do not provide as -** much information about problems as programmers might like. In an effort to -** address this, newer versions of SQLite (version 3.3.8 and later) include -** support for additional result codes that provide more detailed information -** about errors. The extended result codes are enabled or disabled -** for each database connection using the [sqlite3_extended_result_codes()] -** API. -** -** Some of the available extended result codes are listed here. -** One may expect the number of extended result codes will be expand -** over time. Software that uses extended result codes should expect -** to see new result codes in future releases of SQLite. -** -** The SQLITE_OK result code will never be extended. It will always -** be exactly zero. -** -** INVARIANTS: -** -** {F10223} The symbolic name for an extended result code always contains -** a related primary result code as a prefix. -** -** {F10224} Primary result code names contain a single "_" character. -** -** {F10225} Extended result code names contain two or more "_" characters. -** -** {F10226} The numeric value of an extended result code contains the -** numeric value of its corresponding primary result code in -** its least significant 8 bits. -*/ -#define SQLITE_IOERR_READ (SQLITE_IOERR | (1<<8)) -#define SQLITE_IOERR_SHORT_READ (SQLITE_IOERR | (2<<8)) -#define SQLITE_IOERR_WRITE (SQLITE_IOERR | (3<<8)) -#define SQLITE_IOERR_FSYNC (SQLITE_IOERR | (4<<8)) -#define SQLITE_IOERR_DIR_FSYNC (SQLITE_IOERR | (5<<8)) -#define SQLITE_IOERR_TRUNCATE (SQLITE_IOERR | (6<<8)) -#define SQLITE_IOERR_FSTAT (SQLITE_IOERR | (7<<8)) -#define SQLITE_IOERR_UNLOCK (SQLITE_IOERR | (8<<8)) -#define SQLITE_IOERR_RDLOCK (SQLITE_IOERR | (9<<8)) -#define SQLITE_IOERR_DELETE (SQLITE_IOERR | (10<<8)) -#define SQLITE_IOERR_BLOCKED (SQLITE_IOERR | (11<<8)) -#define SQLITE_IOERR_NOMEM (SQLITE_IOERR | (12<<8)) - -/* -** CAPI3REF: Flags For File Open Operations {F10230} -** -** These bit values are intended for use in the -** 3rd parameter to the [sqlite3_open_v2()] interface and -** in the 4th parameter to the xOpen method of the -** [sqlite3_vfs] object. -*/ -#define SQLITE_OPEN_READONLY 0x00000001 -#define SQLITE_OPEN_READWRITE 0x00000002 -#define SQLITE_OPEN_CREATE 0x00000004 -#define SQLITE_OPEN_DELETEONCLOSE 0x00000008 -#define SQLITE_OPEN_EXCLUSIVE 0x00000010 -#define SQLITE_OPEN_MAIN_DB 0x00000100 -#define SQLITE_OPEN_TEMP_DB 0x00000200 -#define SQLITE_OPEN_TRANSIENT_DB 0x00000400 -#define SQLITE_OPEN_MAIN_JOURNAL 0x00000800 -#define SQLITE_OPEN_TEMP_JOURNAL 0x00001000 -#define SQLITE_OPEN_SUBJOURNAL 0x00002000 -#define SQLITE_OPEN_MASTER_JOURNAL 0x00004000 - -/* -** CAPI3REF: Device Characteristics {F10240} -** -** The xDeviceCapabilities method of the [sqlite3_io_methods] -** object returns an integer which is a vector of the these -** bit values expressing I/O characteristics of the mass storage -** device that holds the file that the [sqlite3_io_methods] -** refers to. -** -** The SQLITE_IOCAP_ATOMIC property means that all writes of -** any size are atomic. The SQLITE_IOCAP_ATOMICnnn values -** mean that writes of blocks that are nnn bytes in size and -** are aligned to an address which is an integer multiple of -** nnn are atomic. The SQLITE_IOCAP_SAFE_APPEND value means -** that when data is appended to a file, the data is appended -** first then the size of the file is extended, never the other -** way around. The SQLITE_IOCAP_SEQUENTIAL property means that -** information is written to disk in the same order as calls -** to xWrite(). -*/ -#define SQLITE_IOCAP_ATOMIC 0x00000001 -#define SQLITE_IOCAP_ATOMIC512 0x00000002 -#define SQLITE_IOCAP_ATOMIC1K 0x00000004 -#define SQLITE_IOCAP_ATOMIC2K 0x00000008 -#define SQLITE_IOCAP_ATOMIC4K 0x00000010 -#define SQLITE_IOCAP_ATOMIC8K 0x00000020 -#define SQLITE_IOCAP_ATOMIC16K 0x00000040 -#define SQLITE_IOCAP_ATOMIC32K 0x00000080 -#define SQLITE_IOCAP_ATOMIC64K 0x00000100 -#define SQLITE_IOCAP_SAFE_APPEND 0x00000200 -#define SQLITE_IOCAP_SEQUENTIAL 0x00000400 - -/* -** CAPI3REF: File Locking Levels {F10250} -** -** SQLite uses one of these integer values as the second -** argument to calls it makes to the xLock() and xUnlock() methods -** of an [sqlite3_io_methods] object. -*/ -#define SQLITE_LOCK_NONE 0 -#define SQLITE_LOCK_SHARED 1 -#define SQLITE_LOCK_RESERVED 2 -#define SQLITE_LOCK_PENDING 3 -#define SQLITE_LOCK_EXCLUSIVE 4 - -/* -** CAPI3REF: Synchronization Type Flags {F10260} -** -** When SQLite invokes the xSync() method of an -** [sqlite3_io_methods] object it uses a combination of -** these integer values as the second argument. -** -** When the SQLITE_SYNC_DATAONLY flag is used, it means that the -** sync operation only needs to flush data to mass storage. Inode -** information need not be flushed. The SQLITE_SYNC_NORMAL flag means -** to use normal fsync() semantics. The SQLITE_SYNC_FULL flag means -** to use Mac OS-X style fullsync instead of fsync(). -*/ -#define SQLITE_SYNC_NORMAL 0x00002 -#define SQLITE_SYNC_FULL 0x00003 -#define SQLITE_SYNC_DATAONLY 0x00010 - - -/* -** CAPI3REF: OS Interface Open File Handle {F11110} -** -** An [sqlite3_file] object represents an open file in the OS -** interface layer. Individual OS interface implementations will -** want to subclass this object by appending additional fields -** for their own use. The pMethods entry is a pointer to an -** [sqlite3_io_methods] object that defines methods for performing -** I/O operations on the open file. -*/ -typedef struct sqlite3_file sqlite3_file; -struct sqlite3_file { - const struct sqlite3_io_methods *pMethods; /* Methods for an open file */ -}; - -/* -** CAPI3REF: OS Interface File Virtual Methods Object {F11120} -** -** Every file opened by the [sqlite3_vfs] xOpen method contains a pointer to -** an instance of this object. This object defines the -** methods used to perform various operations against the open file. -** -** The flags argument to xSync may be one of [SQLITE_SYNC_NORMAL] or -** [SQLITE_SYNC_FULL]. The first choice is the normal fsync(). -* The second choice is an -** OS-X style fullsync. The SQLITE_SYNC_DATA flag may be ORed in to -** indicate that only the data of the file and not its inode needs to be -** synced. -** -** The integer values to xLock() and xUnlock() are one of -**
    -**
  • [SQLITE_LOCK_NONE], -**
  • [SQLITE_LOCK_SHARED], -**
  • [SQLITE_LOCK_RESERVED], -**
  • [SQLITE_LOCK_PENDING], or -**
  • [SQLITE_LOCK_EXCLUSIVE]. -**
-** xLock() increases the lock. xUnlock() decreases the lock. -** The xCheckReservedLock() method looks -** to see if any database connection, either in this -** process or in some other process, is holding an RESERVED, -** PENDING, or EXCLUSIVE lock on the file. It returns true -** if such a lock exists and false if not. -** -** The xFileControl() method is a generic interface that allows custom -** VFS implementations to directly control an open file using the -** [sqlite3_file_control()] interface. The second "op" argument -** is an integer opcode. The third -** argument is a generic pointer which is intended to be a pointer -** to a structure that may contain arguments or space in which to -** write return values. Potential uses for xFileControl() might be -** functions to enable blocking locks with timeouts, to change the -** locking strategy (for example to use dot-file locks), to inquire -** about the status of a lock, or to break stale locks. The SQLite -** core reserves opcodes less than 100 for its own use. -** A [SQLITE_FCNTL_LOCKSTATE | list of opcodes] less than 100 is available. -** Applications that define a custom xFileControl method should use opcodes -** greater than 100 to avoid conflicts. -** -** The xSectorSize() method returns the sector size of the -** device that underlies the file. The sector size is the -** minimum write that can be performed without disturbing -** other bytes in the file. The xDeviceCharacteristics() -** method returns a bit vector describing behaviors of the -** underlying device: -** -**
    -**
  • [SQLITE_IOCAP_ATOMIC] -**
  • [SQLITE_IOCAP_ATOMIC512] -**
  • [SQLITE_IOCAP_ATOMIC1K] -**
  • [SQLITE_IOCAP_ATOMIC2K] -**
  • [SQLITE_IOCAP_ATOMIC4K] -**
  • [SQLITE_IOCAP_ATOMIC8K] -**
  • [SQLITE_IOCAP_ATOMIC16K] -**
  • [SQLITE_IOCAP_ATOMIC32K] -**
  • [SQLITE_IOCAP_ATOMIC64K] -**
  • [SQLITE_IOCAP_SAFE_APPEND] -**
  • [SQLITE_IOCAP_SEQUENTIAL] -**
-** -** The SQLITE_IOCAP_ATOMIC property means that all writes of -** any size are atomic. The SQLITE_IOCAP_ATOMICnnn values -** mean that writes of blocks that are nnn bytes in size and -** are aligned to an address which is an integer multiple of -** nnn are atomic. The SQLITE_IOCAP_SAFE_APPEND value means -** that when data is appended to a file, the data is appended -** first then the size of the file is extended, never the other -** way around. The SQLITE_IOCAP_SEQUENTIAL property means that -** information is written to disk in the same order as calls -** to xWrite(). -*/ -typedef struct sqlite3_io_methods sqlite3_io_methods; -struct sqlite3_io_methods { - int iVersion; - int (*xClose)(sqlite3_file*); - int (*xRead)(sqlite3_file*, void*, int iAmt, sqlite3_int64 iOfst); - int (*xWrite)(sqlite3_file*, const void*, int iAmt, sqlite3_int64 iOfst); - int (*xTruncate)(sqlite3_file*, sqlite3_int64 size); - int (*xSync)(sqlite3_file*, int flags); - int (*xFileSize)(sqlite3_file*, sqlite3_int64 *pSize); - int (*xLock)(sqlite3_file*, int); - int (*xUnlock)(sqlite3_file*, int); - int (*xCheckReservedLock)(sqlite3_file*); - int (*xFileControl)(sqlite3_file*, int op, void *pArg); - int (*xSectorSize)(sqlite3_file*); - int (*xDeviceCharacteristics)(sqlite3_file*); - /* Additional methods may be added in future releases */ -}; - -/* -** CAPI3REF: Standard File Control Opcodes {F11310} -** -** These integer constants are opcodes for the xFileControl method -** of the [sqlite3_io_methods] object and to the [sqlite3_file_control()] -** interface. -** -** The [SQLITE_FCNTL_LOCKSTATE] opcode is used for debugging. This -** opcode causes the xFileControl method to write the current state of -** the lock (one of [SQLITE_LOCK_NONE], [SQLITE_LOCK_SHARED], -** [SQLITE_LOCK_RESERVED], [SQLITE_LOCK_PENDING], or [SQLITE_LOCK_EXCLUSIVE]) -** into an integer that the pArg argument points to. This capability -** is used during testing and only needs to be supported when SQLITE_TEST -** is defined. -*/ -#define SQLITE_FCNTL_LOCKSTATE 1 - -/* -** CAPI3REF: Mutex Handle {F17110} -** -** The mutex module within SQLite defines [sqlite3_mutex] to be an -** abstract type for a mutex object. The SQLite core never looks -** at the internal representation of an [sqlite3_mutex]. It only -** deals with pointers to the [sqlite3_mutex] object. -** -** Mutexes are created using [sqlite3_mutex_alloc()]. -*/ -typedef struct sqlite3_mutex sqlite3_mutex; - -/* -** CAPI3REF: OS Interface Object {F11140} -** -** An instance of this object defines the interface between the -** SQLite core and the underlying operating system. The "vfs" -** in the name of the object stands for "virtual file system". -** -** The iVersion field is initially 1 but may be larger for future -** versions of SQLite. Additional fields may be appended to this -** object when the iVersion value is increased. -** -** The szOsFile field is the size of the subclassed [sqlite3_file] -** structure used by this VFS. mxPathname is the maximum length of -** a pathname in this VFS. -** -** Registered sqlite3_vfs objects are kept on a linked list formed by -** the pNext pointer. The [sqlite3_vfs_register()] -** and [sqlite3_vfs_unregister()] interfaces manage this list -** in a thread-safe way. The [sqlite3_vfs_find()] interface -** searches the list. -** -** The pNext field is the only field in the sqlite3_vfs -** structure that SQLite will ever modify. SQLite will only access -** or modify this field while holding a particular static mutex. -** The application should never modify anything within the sqlite3_vfs -** object once the object has been registered. -** -** The zName field holds the name of the VFS module. The name must -** be unique across all VFS modules. -** -** {F11141} SQLite will guarantee that the zFilename string passed to -** xOpen() is a full pathname as generated by xFullPathname() and -** that the string will be valid and unchanged until xClose() is -** called. {END} So the [sqlite3_file] can store a pointer to the -** filename if it needs to remember the filename for some reason. -** -** {F11142} The flags argument to xOpen() includes all bits set in -** the flags argument to [sqlite3_open_v2()]. Or if [sqlite3_open()] -** or [sqlite3_open16()] is used, then flags includes at least -** [SQLITE_OPEN_READWRITE] | [SQLITE_OPEN_CREATE]. {END} -** If xOpen() opens a file read-only then it sets *pOutFlags to -** include [SQLITE_OPEN_READONLY]. Other bits in *pOutFlags may be -** set. -** -** {F11143} SQLite will also add one of the following flags to the xOpen() -** call, depending on the object being opened: -** -**
    -**
  • [SQLITE_OPEN_MAIN_DB] -**
  • [SQLITE_OPEN_MAIN_JOURNAL] -**
  • [SQLITE_OPEN_TEMP_DB] -**
  • [SQLITE_OPEN_TEMP_JOURNAL] -**
  • [SQLITE_OPEN_TRANSIENT_DB] -**
  • [SQLITE_OPEN_SUBJOURNAL] -**
  • [SQLITE_OPEN_MASTER_JOURNAL] -**
{END} -** -** The file I/O implementation can use the object type flags to -** changes the way it deals with files. For example, an application -** that does not care about crash recovery or rollback might make -** the open of a journal file a no-op. Writes to this journal would -** also be no-ops, and any attempt to read the journal would return -** SQLITE_IOERR. Or the implementation might recognize that a database -** file will be doing page-aligned sector reads and writes in a random -** order and set up its I/O subsystem accordingly. -** -** SQLite might also add one of the following flags to the xOpen -** method: -** -**
    -**
  • [SQLITE_OPEN_DELETEONCLOSE] -**
  • [SQLITE_OPEN_EXCLUSIVE] -**
-** -** {F11145} The [SQLITE_OPEN_DELETEONCLOSE] flag means the file should be -** deleted when it is closed. {F11146} The [SQLITE_OPEN_DELETEONCLOSE] -** will be set for TEMP databases, journals and for subjournals. -** {F11147} The [SQLITE_OPEN_EXCLUSIVE] flag means the file should be opened -** for exclusive access. This flag is set for all files except -** for the main database file. {END} -** -** {F11148} At least szOsFile bytes of memory are allocated by SQLite -** to hold the [sqlite3_file] structure passed as the third -** argument to xOpen. {END} The xOpen method does not have to -** allocate the structure; it should just fill it in. -** -** {F11149} The flags argument to xAccess() may be [SQLITE_ACCESS_EXISTS] -** to test for the existance of a file, -** or [SQLITE_ACCESS_READWRITE] to test to see -** if a file is readable and writable, or [SQLITE_ACCESS_READ] -** to test to see if a file is at least readable. {END} The file can be a -** directory. -** -** {F11150} SQLite will always allocate at least mxPathname+1 bytes for -** the output buffers for xGetTempname and xFullPathname. {F11151} The exact -** size of the output buffer is also passed as a parameter to both -** methods. {END} If the output buffer is not large enough, SQLITE_CANTOPEN -** should be returned. As this is handled as a fatal error by SQLite, -** vfs implementations should endeavor to prevent this by setting -** mxPathname to a sufficiently large value. -** -** The xRandomness(), xSleep(), and xCurrentTime() interfaces -** are not strictly a part of the filesystem, but they are -** included in the VFS structure for completeness. -** The xRandomness() function attempts to return nBytes bytes -** of good-quality randomness into zOut. The return value is -** the actual number of bytes of randomness obtained. The -** xSleep() method causes the calling thread to sleep for at -** least the number of microseconds given. The xCurrentTime() -** method returns a Julian Day Number for the current date and -** time. -*/ -typedef struct sqlite3_vfs sqlite3_vfs; -struct sqlite3_vfs { - int iVersion; /* Structure version number */ - int szOsFile; /* Size of subclassed sqlite3_file */ - int mxPathname; /* Maximum file pathname length */ - sqlite3_vfs *pNext; /* Next registered VFS */ - const char *zName; /* Name of this virtual file system */ - void *pAppData; /* Pointer to application-specific data */ - int (*xOpen)(sqlite3_vfs*, const char *zName, sqlite3_file*, - int flags, int *pOutFlags); - int (*xDelete)(sqlite3_vfs*, const char *zName, int syncDir); - int (*xAccess)(sqlite3_vfs*, const char *zName, int flags); - int (*xGetTempname)(sqlite3_vfs*, int nOut, char *zOut); - int (*xFullPathname)(sqlite3_vfs*, const char *zName, int nOut, char *zOut); - void *(*xDlOpen)(sqlite3_vfs*, const char *zFilename); - void (*xDlError)(sqlite3_vfs*, int nByte, char *zErrMsg); - void *(*xDlSym)(sqlite3_vfs*,void*, const char *zSymbol); - void (*xDlClose)(sqlite3_vfs*, void*); - int (*xRandomness)(sqlite3_vfs*, int nByte, char *zOut); - int (*xSleep)(sqlite3_vfs*, int microseconds); - int (*xCurrentTime)(sqlite3_vfs*, double*); - /* New fields may be appended in figure versions. The iVersion - ** value will increment whenever this happens. */ -}; - -/* -** CAPI3REF: Flags for the xAccess VFS method {F11190} -** -** {F11191} These integer constants can be used as the third parameter to -** the xAccess method of an [sqlite3_vfs] object. {END} They determine -** what kind of permissions the xAccess method is -** looking for. {F11192} With SQLITE_ACCESS_EXISTS, the xAccess method -** simply checks to see if the file exists. {F11193} With -** SQLITE_ACCESS_READWRITE, the xAccess method checks to see -** if the file is both readable and writable. {F11194} With -** SQLITE_ACCESS_READ the xAccess method -** checks to see if the file is readable. -*/ -#define SQLITE_ACCESS_EXISTS 0 -#define SQLITE_ACCESS_READWRITE 1 -#define SQLITE_ACCESS_READ 2 - -/* -** CAPI3REF: Enable Or Disable Extended Result Codes {F12200} -** -** The sqlite3_extended_result_codes() routine enables or disables the -** [SQLITE_IOERR_READ | extended result codes] feature of SQLite. -** The extended result codes are disabled by default for historical -** compatibility. -** -** INVARIANTS: -** -** {F12201} Each new [database connection] has the -** [extended result codes] feature -** disabled by default. -** -** {F12202} The [sqlite3_extended_result_codes(D,F)] interface will enable -** [extended result codes] for the -** [database connection] D if the F parameter -** is true, or disable them if F is false. -*/ -SQLITE_API int sqlite3_extended_result_codes(sqlite3*, int onoff); - -/* -** CAPI3REF: Last Insert Rowid {F12220} -** -** Each entry in an SQLite table has a unique 64-bit signed -** integer key called the "rowid". The rowid is always available -** as an undeclared column named ROWID, OID, or _ROWID_ as long as those -** names are not also used by explicitly declared columns. If -** the table has a column of type INTEGER PRIMARY KEY then that column -** is another alias for the rowid. -** -** This routine returns the rowid of the most recent -** successful INSERT into the database from the database connection -** shown in the first argument. If no successful inserts -** have ever occurred on this database connection, zero is returned. -** -** If an INSERT occurs within a trigger, then the rowid of the -** inserted row is returned by this routine as long as the trigger -** is running. But once the trigger terminates, the value returned -** by this routine reverts to the last value inserted before the -** trigger fired. -** -** An INSERT that fails due to a constraint violation is not a -** successful insert and does not change the value returned by this -** routine. Thus INSERT OR FAIL, INSERT OR IGNORE, INSERT OR ROLLBACK, -** and INSERT OR ABORT make no changes to the return value of this -** routine when their insertion fails. When INSERT OR REPLACE -** encounters a constraint violation, it does not fail. The -** INSERT continues to completion after deleting rows that caused -** the constraint problem so INSERT OR REPLACE will always change -** the return value of this interface. -** -** For the purposes of this routine, an insert is considered to -** be successful even if it is subsequently rolled back. -** -** INVARIANTS: -** -** {F12221} The [sqlite3_last_insert_rowid()] function returns the -** rowid of the most recent successful insert done -** on the same database connection and within the same -** trigger context, or zero if there have -** been no qualifying inserts on that connection. -** -** {F12223} The [sqlite3_last_insert_rowid()] function returns -** same value when called from the same trigger context -** immediately before and after a ROLLBACK. -** -** LIMITATIONS: -** -** {U12232} If a separate thread does a new insert on the same -** database connection while the [sqlite3_last_insert_rowid()] -** function is running and thus changes the last insert rowid, -** then the value returned by [sqlite3_last_insert_rowid()] is -** unpredictable and might not equal either the old or the new -** last insert rowid. -*/ -SQLITE_API sqlite3_int64 sqlite3_last_insert_rowid(sqlite3*); - -/* -** CAPI3REF: Count The Number Of Rows Modified {F12240} -** -** This function returns the number of database rows that were changed -** or inserted or deleted by the most recently completed SQL statement -** on the connection specified by the first parameter. Only -** changes that are directly specified by the INSERT, UPDATE, or -** DELETE statement are counted. Auxiliary changes caused by -** triggers are not counted. Use the [sqlite3_total_changes()] function -** to find the total number of changes including changes caused by triggers. -** -** A "row change" is a change to a single row of a single table -** caused by an INSERT, DELETE, or UPDATE statement. Rows that -** are changed as side effects of REPLACE constraint resolution, -** rollback, ABORT processing, DROP TABLE, or by any other -** mechanisms do not count as direct row changes. -** -** A "trigger context" is a scope of execution that begins and -** ends with the script of a trigger. Most SQL statements are -** evaluated outside of any trigger. This is the "top level" -** trigger context. If a trigger fires from the top level, a -** new trigger context is entered for the duration of that one -** trigger. Subtriggers create subcontexts for their duration. -** -** Calling [sqlite3_exec()] or [sqlite3_step()] recursively does -** not create a new trigger context. -** -** This function returns the number of direct row changes in the -** most recent INSERT, UPDATE, or DELETE statement within the same -** trigger context. -** -** So when called from the top level, this function returns the -** number of changes in the most recent INSERT, UPDATE, or DELETE -** that also occurred at the top level. -** Within the body of a trigger, the sqlite3_changes() interface -** can be called to find the number of -** changes in the most recently completed INSERT, UPDATE, or DELETE -** statement within the body of the same trigger. -** However, the number returned does not include in changes -** caused by subtriggers since they have their own context. -** -** SQLite implements the command "DELETE FROM table" without -** a WHERE clause by dropping and recreating the table. (This is much -** faster than going through and deleting individual elements from the -** table.) Because of this optimization, the deletions in -** "DELETE FROM table" are not row changes and will not be counted -** by the sqlite3_changes() or [sqlite3_total_changes()] functions. -** To get an accurate count of the number of rows deleted, use -** "DELETE FROM table WHERE 1" instead. -** -** INVARIANTS: -** -** {F12241} The [sqlite3_changes()] function returns the number of -** row changes caused by the most recent INSERT, UPDATE, -** or DELETE statement on the same database connection and -** within the same trigger context, or zero if there have -** not been any qualifying row changes. -** -** LIMITATIONS: -** -** {U12252} If a separate thread makes changes on the same database connection -** while [sqlite3_changes()] is running then the value returned -** is unpredictable and unmeaningful. -*/ -SQLITE_API int sqlite3_changes(sqlite3*); - -/* -** CAPI3REF: Total Number Of Rows Modified {F12260} -*** -** This function returns the number of row changes caused -** by INSERT, UPDATE or DELETE statements since the database handle -** was opened. The count includes all changes from all trigger -** contexts. But the count does not include changes used to -** implement REPLACE constraints, do rollbacks or ABORT processing, -** or DROP table processing. -** The changes -** are counted as soon as the statement that makes them is completed -** (when the statement handle is passed to [sqlite3_reset()] or -** [sqlite3_finalize()]). -** -** SQLite implements the command "DELETE FROM table" without -** a WHERE clause by dropping and recreating the table. (This is much -** faster than going -** through and deleting individual elements from the table.) Because of -** this optimization, the change count for "DELETE FROM table" will be -** zero regardless of the number of elements that were originally in the -** table. To get an accurate count of the number of rows deleted, use -** "DELETE FROM table WHERE 1" instead. -** -** See also the [sqlite3_changes()] interface. -** -** INVARIANTS: -** -** {F12261} The [sqlite3_total_changes()] returns the total number -** of row changes caused by INSERT, UPDATE, and/or DELETE -** statements on the same [database connection], in any -** trigger context, since the database connection was -** created. -** -** LIMITATIONS: -** -** {U12264} If a separate thread makes changes on the same database connection -** while [sqlite3_total_changes()] is running then the value -** returned is unpredictable and unmeaningful. -*/ -SQLITE_API int sqlite3_total_changes(sqlite3*); - -/* -** CAPI3REF: Interrupt A Long-Running Query {F12270} -** -** This function causes any pending database operation to abort and -** return at its earliest opportunity. This routine is typically -** called in response to a user action such as pressing "Cancel" -** or Ctrl-C where the user wants a long query operation to halt -** immediately. -** -** It is safe to call this routine from a thread different from the -** thread that is currently running the database operation. But it -** is not safe to call this routine with a database connection that -** is closed or might close before sqlite3_interrupt() returns. -** -** If an SQL is very nearly finished at the time when sqlite3_interrupt() -** is called, then it might not have an opportunity to be interrupted. -** It might continue to completion. -** An SQL operation that is interrupted will return -** [SQLITE_INTERRUPT]. If the interrupted SQL operation is an -** INSERT, UPDATE, or DELETE that is inside an explicit transaction, -** then the entire transaction will be rolled back automatically. -** A call to sqlite3_interrupt() has no effect on SQL statements -** that are started after sqlite3_interrupt() returns. -** -** INVARIANTS: -** -** {F12271} The [sqlite3_interrupt()] interface will force all running -** SQL statements associated with the same database connection -** to halt after processing at most one additional row of -** data. -** -** {F12272} Any SQL statement that is interrupted by [sqlite3_interrupt()] -** will return [SQLITE_INTERRUPT]. -** -** LIMITATIONS: -** -** {U12279} If the database connection closes while [sqlite3_interrupt()] -** is running then bad things will likely happen. -*/ -SQLITE_API void sqlite3_interrupt(sqlite3*); - -/* -** CAPI3REF: Determine If An SQL Statement Is Complete {F10510} -** -** These routines are useful for command-line input to determine if the -** currently entered text seems to form complete a SQL statement or -** if additional input is needed before sending the text into -** SQLite for parsing. These routines return true if the input string -** appears to be a complete SQL statement. A statement is judged to be -** complete if it ends with a semicolon token and is not a fragment of a -** CREATE TRIGGER statement. Semicolons that are embedded within -** string literals or quoted identifier names or comments are not -** independent tokens (they are part of the token in which they are -** embedded) and thus do not count as a statement terminator. -** -** These routines do not parse the SQL and -** so will not detect syntactically incorrect SQL. -** -** INVARIANTS: -** -** {F10511} The sqlite3_complete() and sqlite3_complete16() functions -** return true (non-zero) if and only if the last -** non-whitespace token in their input is a semicolon that -** is not in between the BEGIN and END of a CREATE TRIGGER -** statement. -** -** LIMITATIONS: -** -** {U10512} The input to sqlite3_complete() must be a zero-terminated -** UTF-8 string. -** -** {U10513} The input to sqlite3_complete16() must be a zero-terminated -** UTF-16 string in native byte order. -*/ -SQLITE_API int sqlite3_complete(const char *sql); -SQLITE_API int sqlite3_complete16(const void *sql); - -/* -** CAPI3REF: Register A Callback To Handle SQLITE_BUSY Errors {F12310} -** -** This routine identifies a callback function that might be -** invoked whenever an attempt is made to open a database table -** that another thread or process has locked. -** If the busy callback is NULL, then [SQLITE_BUSY] -** or [SQLITE_IOERR_BLOCKED] -** is returned immediately upon encountering the lock. -** If the busy callback is not NULL, then the -** callback will be invoked with two arguments. The -** first argument to the handler is a copy of the void* pointer which -** is the third argument to this routine. The second argument to -** the handler is the number of times that the busy handler has -** been invoked for this locking event. If the -** busy callback returns 0, then no additional attempts are made to -** access the database and [SQLITE_BUSY] or [SQLITE_IOERR_BLOCKED] is returned. -** If the callback returns non-zero, then another attempt -** is made to open the database for reading and the cycle repeats. -** -** The presence of a busy handler does not guarantee that -** it will be invoked when there is lock contention. -** If SQLite determines that invoking the busy handler could result in -** a deadlock, it will go ahead and return [SQLITE_BUSY] or -** [SQLITE_IOERR_BLOCKED] instead of invoking the -** busy handler. -** Consider a scenario where one process is holding a read lock that -** it is trying to promote to a reserved lock and -** a second process is holding a reserved lock that it is trying -** to promote to an exclusive lock. The first process cannot proceed -** because it is blocked by the second and the second process cannot -** proceed because it is blocked by the first. If both processes -** invoke the busy handlers, neither will make any progress. Therefore, -** SQLite returns [SQLITE_BUSY] for the first process, hoping that this -** will induce the first process to release its read lock and allow -** the second process to proceed. -** -** The default busy callback is NULL. -** -** The [SQLITE_BUSY] error is converted to [SQLITE_IOERR_BLOCKED] -** when SQLite is in the middle of a large transaction where all the -** changes will not fit into the in-memory cache. SQLite will -** already hold a RESERVED lock on the database file, but it needs -** to promote this lock to EXCLUSIVE so that it can spill cache -** pages into the database file without harm to concurrent -** readers. If it is unable to promote the lock, then the in-memory -** cache will be left in an inconsistent state and so the error -** code is promoted from the relatively benign [SQLITE_BUSY] to -** the more severe [SQLITE_IOERR_BLOCKED]. This error code promotion -** forces an automatic rollback of the changes. See the -** -** CorruptionFollowingBusyError wiki page for a discussion of why -** this is important. -** -** There can only be a single busy handler defined for each database -** connection. Setting a new busy handler clears any previous one. -** Note that calling [sqlite3_busy_timeout()] will also set or clear -** the busy handler. -** -** INVARIANTS: -** -** {F12311} The [sqlite3_busy_handler()] function replaces the busy handler -** callback in the database connection identified by the 1st -** parameter with a new busy handler identified by the 2nd and 3rd -** parameters. -** -** {F12312} The default busy handler for new database connections is NULL. -** -** {F12314} When two or more database connection share a common cache, -** the busy handler for the database connection currently using -** the cache is invoked when the cache encounters a lock. -** -** {F12316} If a busy handler callback returns zero, then the SQLite -** interface that provoked the locking event will return -** [SQLITE_BUSY]. -** -** {F12318} SQLite will invokes the busy handler with two argument which -** are a copy of the pointer supplied by the 3rd parameter to -** [sqlite3_busy_handler()] and a count of the number of prior -** invocations of the busy handler for the same locking event. -** -** LIMITATIONS: -** -** {U12319} A busy handler should not call close the database connection -** or prepared statement that invoked the busy handler. -*/ -SQLITE_API int sqlite3_busy_handler(sqlite3*, int(*)(void*,int), void*); - -/* -** CAPI3REF: Set A Busy Timeout {F12340} -** -** This routine sets a [sqlite3_busy_handler | busy handler] -** that sleeps for a while when a -** table is locked. The handler will sleep multiple times until -** at least "ms" milliseconds of sleeping have been done. {F12343} After -** "ms" milliseconds of sleeping, the handler returns 0 which -** causes [sqlite3_step()] to return [SQLITE_BUSY] or [SQLITE_IOERR_BLOCKED]. -** -** Calling this routine with an argument less than or equal to zero -** turns off all busy handlers. -** -** There can only be a single busy handler for a particular database -** connection. If another busy handler was defined -** (using [sqlite3_busy_handler()]) prior to calling -** this routine, that other busy handler is cleared. -** -** INVARIANTS: -** -** {F12341} The [sqlite3_busy_timeout()] function overrides any prior -** [sqlite3_busy_timeout()] or [sqlite3_busy_handler()] setting -** on the same database connection. -** -** {F12343} If the 2nd parameter to [sqlite3_busy_timeout()] is less than -** or equal to zero, then the busy handler is cleared so that -** all subsequent locking events immediately return [SQLITE_BUSY]. -** -** {F12344} If the 2nd parameter to [sqlite3_busy_timeout()] is a positive -** number N, then a busy handler is set that repeatedly calls -** the xSleep() method in the VFS interface until either the -** lock clears or until the cumulative sleep time reported back -** by xSleep() exceeds N milliseconds. -*/ -SQLITE_API int sqlite3_busy_timeout(sqlite3*, int ms); - -/* -** CAPI3REF: Convenience Routines For Running Queries {F12370} -** -** Definition: A result table is memory data structure created by the -** [sqlite3_get_table()] interface. A result table records the -** complete query results from one or more queries. -** -** The table conceptually has a number of rows and columns. But -** these numbers are not part of the result table itself. These -** numbers are obtained separately. Let N be the number of rows -** and M be the number of columns. -** -** A result table is an array of pointers to zero-terminated -** UTF-8 strings. There are (N+1)*M elements in the array. -** The first M pointers point to zero-terminated strings that -** contain the names of the columns. -** The remaining entries all point to query results. NULL -** values are give a NULL pointer. All other values are in -** their UTF-8 zero-terminated string representation as returned by -** [sqlite3_column_text()]. -** -** A result table might consists of one or more memory allocations. -** It is not safe to pass a result table directly to [sqlite3_free()]. -** A result table should be deallocated using [sqlite3_free_table()]. -** -** As an example of the result table format, suppose a query result -** is as follows: -** -** 
-**        Name        | Age
-**        -----------------------
-**        Alice       | 43
-**        Bob         | 28
-**        Cindy       | 21
-**
-** -** There are two column (M==2) and three rows (N==3). Thus the -** result table has 8 entries. Suppose the result table is stored -** in an array names azResult. Then azResult holds this content: -** -** 
-**        azResult[0] = "Name";
-**        azResult[1] = "Age";
-**        azResult[2] = "Alice";
-**        azResult[3] = "43";
-**        azResult[4] = "Bob";
-**        azResult[5] = "28";
-**        azResult[6] = "Cindy";
-**        azResult[7] = "21";
-**
-** -** The sqlite3_get_table() function evaluates one or more -** semicolon-separated SQL statements in the zero-terminated UTF-8 -** string of its 2nd parameter. It returns a result table to the -** pointer given in its 3rd parameter. -** -** After the calling function has finished using the result, it should -** pass the pointer to the result table to sqlite3_free_table() in order to -** release the memory that was malloc-ed. Because of the way the -** [sqlite3_malloc()] happens within sqlite3_get_table(), the calling -** function must not try to call [sqlite3_free()] directly. Only -** [sqlite3_free_table()] is able to release the memory properly and safely. -** -** The sqlite3_get_table() interface is implemented as a wrapper around -** [sqlite3_exec()]. The sqlite3_get_table() routine does not have access -** to any internal data structures of SQLite. It uses only the public -** interface defined here. As a consequence, errors that occur in the -** wrapper layer outside of the internal [sqlite3_exec()] call are not -** reflected in subsequent calls to [sqlite3_errcode()] or -** [sqlite3_errmsg()]. -** -** INVARIANTS: -** -** {F12371} If a [sqlite3_get_table()] fails a memory allocation, then -** it frees the result table under construction, aborts the -** query in process, skips any subsequent queries, sets the -** *resultp output pointer to NULL and returns [SQLITE_NOMEM]. -** -** {F12373} If the ncolumn parameter to [sqlite3_get_table()] is not NULL -** then [sqlite3_get_table()] write the number of columns in the -** result set of the query into *ncolumn if the query is -** successful (if the function returns SQLITE_OK). -** -** {F12374} If the nrow parameter to [sqlite3_get_table()] is not NULL -** then [sqlite3_get_table()] write the number of rows in the -** result set of the query into *nrow if the query is -** successful (if the function returns SQLITE_OK). -** -** {F12376} The [sqlite3_get_table()] function sets its *ncolumn value -** to the number of columns in the result set of the query in the -** sql parameter, or to zero if the query in sql has an empty -** result set. -*/ -SQLITE_API int sqlite3_get_table( - sqlite3*, /* An open database */ - const char *sql, /* SQL to be evaluated */ - char ***pResult, /* Results of the query */ - int *nrow, /* Number of result rows written here */ - int *ncolumn, /* Number of result columns written here */ - char **errmsg /* Error msg written here */ -); -SQLITE_API void sqlite3_free_table(char **result); - -/* -** CAPI3REF: Formatted String Printing Functions {F17400} -** -** These routines are workalikes of the "printf()" family of functions -** from the standard C library. -** -** The sqlite3_mprintf() and sqlite3_vmprintf() routines write their -** results into memory obtained from [sqlite3_malloc()]. -** The strings returned by these two routines should be -** released by [sqlite3_free()]. Both routines return a -** NULL pointer if [sqlite3_malloc()] is unable to allocate enough -** memory to hold the resulting string. -** -** In sqlite3_snprintf() routine is similar to "snprintf()" from -** the standard C library. The result is written into the -** buffer supplied as the second parameter whose size is given by -** the first parameter. Note that the order of the -** first two parameters is reversed from snprintf(). This is an -** historical accident that cannot be fixed without breaking -** backwards compatibility. Note also that sqlite3_snprintf() -** returns a pointer to its buffer instead of the number of -** characters actually written into the buffer. We admit that -** the number of characters written would be a more useful return -** value but we cannot change the implementation of sqlite3_snprintf() -** now without breaking compatibility. -** -** As long as the buffer size is greater than zero, sqlite3_snprintf() -** guarantees that the buffer is always zero-terminated. The first -** parameter "n" is the total size of the buffer, including space for -** the zero terminator. So the longest string that can be completely -** written will be n-1 characters. -** -** These routines all implement some additional formatting -** options that are useful for constructing SQL statements. -** All of the usual printf formatting options apply. In addition, there -** is are "%q", "%Q", and "%z" options. -** -** The %q option works like %s in that it substitutes a null-terminated -** string from the argument list. But %q also doubles every '\'' character. -** %q is designed for use inside a string literal. By doubling each '\'' -** character it escapes that character and allows it to be inserted into -** the string. -** -** For example, so some string variable contains text as follows: -** -** 
-**  char *zText = "It's a happy day!";
-**
-** -** One can use this text in an SQL statement as follows: -** -** 
-**  char *zSQL = sqlite3_mprintf("INSERT INTO table VALUES('%q')", zText);
-**  sqlite3_exec(db, zSQL, 0, 0, 0);
-**  sqlite3_free(zSQL);
-**
-** -** Because the %q format string is used, the '\'' character in zText -** is escaped and the SQL generated is as follows: -** -** 
-**  INSERT INTO table1 VALUES('It''s a happy day!')
-**
-** -** This is correct. Had we used %s instead of %q, the generated SQL -** would have looked like this: -** -** 
-**  INSERT INTO table1 VALUES('It's a happy day!');
-**
-** -** This second example is an SQL syntax error. As a general rule you -** should always use %q instead of %s when inserting text into a string -** literal. -** -** The %Q option works like %q except it also adds single quotes around -** the outside of the total string. Or if the parameter in the argument -** list is a NULL pointer, %Q substitutes the text "NULL" (without single -** quotes) in place of the %Q option. {END} So, for example, one could say: -** -** 
-**  char *zSQL = sqlite3_mprintf("INSERT INTO table VALUES(%Q)", zText);
-**  sqlite3_exec(db, zSQL, 0, 0, 0);
-**  sqlite3_free(zSQL);
-**
-** -** The code above will render a correct SQL statement in the zSQL -** variable even if the zText variable is a NULL pointer. -** -** The "%z" formatting option works exactly like "%s" with the -** addition that after the string has been read and copied into -** the result, [sqlite3_free()] is called on the input string. {END} -** -** INVARIANTS: -** -** {F17403} The [sqlite3_mprintf()] and [sqlite3_vmprintf()] interfaces -** return either pointers to zero-terminated UTF-8 strings held in -** memory obtained from [sqlite3_malloc()] or NULL pointers if -** a call to [sqlite3_malloc()] fails. -** -** {F17406} The [sqlite3_snprintf()] interface writes a zero-terminated -** UTF-8 string into the buffer pointed to by the second parameter -** provided that the first parameter is greater than zero. -** -** {F17407} The [sqlite3_snprintf()] interface does not writes slots of -** its output buffer (the second parameter) outside the range -** of 0 through N-1 (where N is the first parameter) -** regardless of the length of the string -** requested by the format specification. -** -*/ -SQLITE_API char *sqlite3_mprintf(const char*,...); -SQLITE_API char *sqlite3_vmprintf(const char*, va_list); -SQLITE_API char *sqlite3_snprintf(int,char*,const char*, ...); - -/* -** CAPI3REF: Memory Allocation Subsystem {F17300} -** -** The SQLite core uses these three routines for all of its own -** internal memory allocation needs. "Core" in the previous sentence -** does not include operating-system specific VFS implementation. The -** windows VFS uses native malloc and free for some operations. -** -** The sqlite3_malloc() routine returns a pointer to a block -** of memory at least N bytes in length, where N is the parameter. -** If sqlite3_malloc() is unable to obtain sufficient free -** memory, it returns a NULL pointer. If the parameter N to -** sqlite3_malloc() is zero or negative then sqlite3_malloc() returns -** a NULL pointer. -** -** Calling sqlite3_free() with a pointer previously returned -** by sqlite3_malloc() or sqlite3_realloc() releases that memory so -** that it might be reused. The sqlite3_free() routine is -** a no-op if is called with a NULL pointer. Passing a NULL pointer -** to sqlite3_free() is harmless. After being freed, memory -** should neither be read nor written. Even reading previously freed -** memory might result in a segmentation fault or other severe error. -** Memory corruption, a segmentation fault, or other severe error -** might result if sqlite3_free() is called with a non-NULL pointer that -** was not obtained from sqlite3_malloc() or sqlite3_free(). -** -** The sqlite3_realloc() interface attempts to resize a -** prior memory allocation to be at least N bytes, where N is the -** second parameter. The memory allocation to be resized is the first -** parameter. If the first parameter to sqlite3_realloc() -** is a NULL pointer then its behavior is identical to calling -** sqlite3_malloc(N) where N is the second parameter to sqlite3_realloc(). -** If the second parameter to sqlite3_realloc() is zero or -** negative then the behavior is exactly the same as calling -** sqlite3_free(P) where P is the first parameter to sqlite3_realloc(). -** Sqlite3_realloc() returns a pointer to a memory allocation -** of at least N bytes in size or NULL if sufficient memory is unavailable. -** If M is the size of the prior allocation, then min(N,M) bytes -** of the prior allocation are copied into the beginning of buffer returned -** by sqlite3_realloc() and the prior allocation is freed. -** If sqlite3_realloc() returns NULL, then the prior allocation -** is not freed. -** -** The memory returned by sqlite3_malloc() and sqlite3_realloc() -** is always aligned to at least an 8 byte boundary. {END} -** -** The default implementation -** of the memory allocation subsystem uses the malloc(), realloc() -** and free() provided by the standard C library. {F17382} However, if -** SQLite is compiled with the following C preprocessor macro -** -**
SQLITE_MEMORY_SIZE=NNN
-** -** where NNN is an integer, then SQLite create a static -** array of at least NNN bytes in size and use that array -** for all of its dynamic memory allocation needs. {END} Additional -** memory allocator options may be added in future releases. -** -** In SQLite version 3.5.0 and 3.5.1, it was possible to define -** the SQLITE_OMIT_MEMORY_ALLOCATION which would cause the built-in -** implementation of these routines to be omitted. That capability -** is no longer provided. Only built-in memory allocators can be -** used. -** -** The windows OS interface layer calls -** the system malloc() and free() directly when converting -** filenames between the UTF-8 encoding used by SQLite -** and whatever filename encoding is used by the particular windows -** installation. Memory allocation errors are detected, but -** they are reported back as [SQLITE_CANTOPEN] or -** [SQLITE_IOERR] rather than [SQLITE_NOMEM]. -** -** INVARIANTS: -** -** {F17303} The [sqlite3_malloc(N)] interface returns either a pointer to -** newly checked-out block of at least N bytes of memory -** that is 8-byte aligned, -** or it returns NULL if it is unable to fulfill the request. -** -** {F17304} The [sqlite3_malloc(N)] interface returns a NULL pointer if -** N is less than or equal to zero. -** -** {F17305} The [sqlite3_free(P)] interface releases memory previously -** returned from [sqlite3_malloc()] or [sqlite3_realloc()], -** making it available for reuse. -** -** {F17306} A call to [sqlite3_free(NULL)] is a harmless no-op. -** -** {F17310} A call to [sqlite3_realloc(0,N)] is equivalent to a call -** to [sqlite3_malloc(N)]. -** -** {F17312} A call to [sqlite3_realloc(P,0)] is equivalent to a call -** to [sqlite3_free(P)]. -** -** {F17315} The SQLite core uses [sqlite3_malloc()], [sqlite3_realloc()], -** and [sqlite3_free()] for all of its memory allocation and -** deallocation needs. -** -** {F17318} The [sqlite3_realloc(P,N)] interface returns either a pointer -** to a block of checked-out memory of at least N bytes in size -** that is 8-byte aligned, or a NULL pointer. -** -** {F17321} When [sqlite3_realloc(P,N)] returns a non-NULL pointer, it first -** copies the first K bytes of content from P into the newly allocated -** where K is the lessor of N and the size of the buffer P. -** -** {F17322} When [sqlite3_realloc(P,N)] returns a non-NULL pointer, it first -** releases the buffer P. -** -** {F17323} When [sqlite3_realloc(P,N)] returns NULL, the buffer P is -** not modified or released. -** -** LIMITATIONS: -** -** {U17350} The pointer arguments to [sqlite3_free()] and [sqlite3_realloc()] -** must be either NULL or else a pointer obtained from a prior -** invocation of [sqlite3_malloc()] or [sqlite3_realloc()] that has -** not been released. -** -** {U17351} The application must not read or write any part of -** a block of memory after it has been released using -** [sqlite3_free()] or [sqlite3_realloc()]. -** -*/ -SQLITE_API void *sqlite3_malloc(int); -SQLITE_API void *sqlite3_realloc(void*, int); -SQLITE_API void sqlite3_free(void*); - -/* -** CAPI3REF: Memory Allocator Statistics {F17370} -** -** SQLite provides these two interfaces for reporting on the status -** of the [sqlite3_malloc()], [sqlite3_free()], and [sqlite3_realloc()] -** the memory allocation subsystem included within the SQLite. -** -** INVARIANTS: -** -** {F17371} The [sqlite3_memory_used()] routine returns the -** number of bytes of memory currently outstanding -** (malloced but not freed). -** -** {F17373} The [sqlite3_memory_highwater()] routine returns the maximum -** value of [sqlite3_memory_used()] -** since the highwater mark was last reset. -** -** {F17374} The values returned by [sqlite3_memory_used()] and -** [sqlite3_memory_highwater()] include any overhead -** added by SQLite in its implementation of [sqlite3_malloc()], -** but not overhead added by the any underlying system library -** routines that [sqlite3_malloc()] may call. -** -** {F17375} The memory highwater mark is reset to the current value of -** [sqlite3_memory_used()] if and only if the parameter to -** [sqlite3_memory_highwater()] is true. The value returned -** by [sqlite3_memory_highwater(1)] is the highwater mark -** prior to the reset. -*/ -SQLITE_API sqlite3_int64 sqlite3_memory_used(void); -SQLITE_API sqlite3_int64 sqlite3_memory_highwater(int resetFlag); - -/* -** CAPI3REF: Pseudo-Random Number Generator {F17390} -** -** SQLite contains a high-quality pseudo-random number generator (PRNG) used to -** select random ROWIDs when inserting new records into a table that -** already uses the largest possible ROWID. The PRNG is also used for -** the build-in random() and randomblob() SQL functions. This interface allows -** appliations to access the same PRNG for other purposes. -** -** A call to this routine stores N bytes of randomness into buffer P. -** -** The first time this routine is invoked (either internally or by -** the application) the PRNG is seeded using randomness obtained -** from the xRandomness method of the default [sqlite3_vfs] object. -** On all subsequent invocations, the pseudo-randomness is generated -** internally and without recourse to the [sqlite3_vfs] xRandomness -** method. -** -** INVARIANTS: -** -** {F17392} The [sqlite3_randomness(N,P)] interface writes N bytes of -** high-quality pseudo-randomness into buffer P. -*/ -SQLITE_API void sqlite3_randomness(int N, void *P); - -/* -** CAPI3REF: Compile-Time Authorization Callbacks {F12500} -** -** This routine registers a authorizer callback with a particular -** [database connection], supplied in the first argument. -** The authorizer callback is invoked as SQL statements are being compiled -** by [sqlite3_prepare()] or its variants [sqlite3_prepare_v2()], -** [sqlite3_prepare16()] and [sqlite3_prepare16_v2()]. At various -** points during the compilation process, as logic is being created -** to perform various actions, the authorizer callback is invoked to -** see if those actions are allowed. The authorizer callback should -** return [SQLITE_OK] to allow the action, [SQLITE_IGNORE] to disallow the -** specific action but allow the SQL statement to continue to be -** compiled, or [SQLITE_DENY] to cause the entire SQL statement to be -** rejected with an error. If the authorizer callback returns -** any value other than [SQLITE_IGNORE], [SQLITE_OK], or [SQLITE_DENY] -** then [sqlite3_prepare_v2()] or equivalent call that triggered -** the authorizer will fail with an error message. -** -** When the callback returns [SQLITE_OK], that means the operation -** requested is ok. When the callback returns [SQLITE_DENY], the -** [sqlite3_prepare_v2()] or equivalent call that triggered the -** authorizer will fail with an error message explaining that -** access is denied. If the authorizer code is [SQLITE_READ] -** and the callback returns [SQLITE_IGNORE] then the -** [prepared statement] statement is constructed to substitute -** a NULL value in place of the table column that would have -** been read if [SQLITE_OK] had been returned. The [SQLITE_IGNORE] -** return can be used to deny an untrusted user access to individual -** columns of a table. -** -** The first parameter to the authorizer callback is a copy of -** the third parameter to the sqlite3_set_authorizer() interface. -** The second parameter to the callback is an integer -** [SQLITE_COPY | action code] that specifies the particular action -** to be authorized. The third through sixth -** parameters to the callback are zero-terminated strings that contain -** additional details about the action to be authorized. -** -** An authorizer is used when [sqlite3_prepare | preparing] -** SQL statements from an untrusted -** source, to ensure that the SQL statements do not try to access data -** that they are not allowed to see, or that they do not try to -** execute malicious statements that damage the database. For -** example, an application may allow a user to enter arbitrary -** SQL queries for evaluation by a database. But the application does -** not want the user to be able to make arbitrary changes to the -** database. An authorizer could then be put in place while the -** user-entered SQL is being [sqlite3_prepare | prepared] that -** disallows everything except [SELECT] statements. -** -** Applications that need to process SQL from untrusted sources -** might also consider lowering resource limits using [sqlite3_limit()] -** and limiting database size using the [max_page_count] [PRAGMA] -** in addition to using an authorizer. -** -** Only a single authorizer can be in place on a database connection -** at a time. Each call to sqlite3_set_authorizer overrides the -** previous call. Disable the authorizer by installing a NULL callback. -** The authorizer is disabled by default. -** -** Note that the authorizer callback is invoked only during -** [sqlite3_prepare()] or its variants. Authorization is not -** performed during statement evaluation in [sqlite3_step()]. -** -** INVARIANTS: -** -** {F12501} The [sqlite3_set_authorizer(D,...)] interface registers a -** authorizer callback with database connection D. -** -** {F12502} The authorizer callback is invoked as SQL statements are -** being compiled -** -** {F12503} If the authorizer callback returns any value other than -** [SQLITE_IGNORE], [SQLITE_OK], or [SQLITE_DENY] then -** the [sqlite3_prepare_v2()] or equivalent call that caused -** the authorizer callback to run shall fail with an -** [SQLITE_ERROR] error code and an appropriate error message. -** -** {F12504} When the authorizer callback returns [SQLITE_OK], the operation -** described is coded normally. -** -** {F12505} When the authorizer callback returns [SQLITE_DENY], the -** [sqlite3_prepare_v2()] or equivalent call that caused the -** authorizer callback to run shall fail -** with an [SQLITE_ERROR] error code and an error message -** explaining that access is denied. -** -** {F12506} If the authorizer code (the 2nd parameter to the authorizer -** callback) is [SQLITE_READ] and the authorizer callback returns -** [SQLITE_IGNORE] then the prepared statement is constructed to -** insert a NULL value in place of the table column that would have -** been read if [SQLITE_OK] had been returned. -** -** {F12507} If the authorizer code (the 2nd parameter to the authorizer -** callback) is anything other than [SQLITE_READ], then -** a return of [SQLITE_IGNORE] has the same effect as [SQLITE_DENY]. -** -** {F12510} The first parameter to the authorizer callback is a copy of -** the third parameter to the [sqlite3_set_authorizer()] interface. -** -** {F12511} The second parameter to the callback is an integer -** [SQLITE_COPY | action code] that specifies the particular action -** to be authorized. -** -** {F12512} The third through sixth parameters to the callback are -** zero-terminated strings that contain -** additional details about the action to be authorized. -** -** {F12520} Each call to [sqlite3_set_authorizer()] overrides the -** any previously installed authorizer. -** -** {F12521} A NULL authorizer means that no authorization -** callback is invoked. -** -** {F12522} The default authorizer is NULL. -*/ -SQLITE_API int sqlite3_set_authorizer( - sqlite3*, - int (*xAuth)(void*,int,const char*,const char*,const char*,const char*), - void *pUserData -); - -/* -** CAPI3REF: Authorizer Return Codes {F12590} -** -** The [sqlite3_set_authorizer | authorizer callback function] must -** return either [SQLITE_OK] or one of these two constants in order -** to signal SQLite whether or not the action is permitted. See the -** [sqlite3_set_authorizer | authorizer documentation] for additional -** information. -*/ -#define SQLITE_DENY 1 /* Abort the SQL statement with an error */ -#define SQLITE_IGNORE 2 /* Don't allow access, but don't generate an error */ - -/* -** CAPI3REF: Authorizer Action Codes {F12550} -** -** The [sqlite3_set_authorizer()] interface registers a callback function -** that is invoked to authorizer certain SQL statement actions. The -** second parameter to the callback is an integer code that specifies -** what action is being authorized. These are the integer action codes that -** the authorizer callback may be passed. -** -** These action code values signify what kind of operation is to be -** authorized. The 3rd and 4th parameters to the authorization -** callback function will be parameters or NULL depending on which of these -** codes is used as the second parameter. The 5th parameter to the -** authorizer callback is the name of the database ("main", "temp", -** etc.) if applicable. The 6th parameter to the authorizer callback -** is the name of the inner-most trigger or view that is responsible for -** the access attempt or NULL if this access attempt is directly from -** top-level SQL code. -** -** INVARIANTS: -** -** {F12551} The second parameter to an -** [sqlite3_set_authorizer | authorizer callback is always an integer -** [SQLITE_COPY | authorizer code] that specifies what action -** is being authorized. -** -** {F12552} The 3rd and 4th parameters to the -** [sqlite3_set_authorizer | authorization callback function] -** will be parameters or NULL depending on which -** [SQLITE_COPY | authorizer code] is used as the second parameter. -** -** {F12553} The 5th parameter to the -** [sqlite3_set_authorizer | authorizer callback] is the name -** of the database (example: "main", "temp", etc.) if applicable. -** -** {F12554} The 6th parameter to the -** [sqlite3_set_authorizer | authorizer callback] is the name -** of the inner-most trigger or view that is responsible for -** the access attempt or NULL if this access attempt is directly from -** top-level SQL code. -*/ -/******************************************* 3rd ************ 4th ***********/ -#define SQLITE_CREATE_INDEX 1 /* Index Name Table Name */ -#define SQLITE_CREATE_TABLE 2 /* Table Name NULL */ -#define SQLITE_CREATE_TEMP_INDEX 3 /* Index Name Table Name */ -#define SQLITE_CREATE_TEMP_TABLE 4 /* Table Name NULL */ -#define SQLITE_CREATE_TEMP_TRIGGER 5 /* Trigger Name Table Name */ -#define SQLITE_CREATE_TEMP_VIEW 6 /* View Name NULL */ -#define SQLITE_CREATE_TRIGGER 7 /* Trigger Name Table Name */ -#define SQLITE_CREATE_VIEW 8 /* View Name NULL */ -#define SQLITE_DELETE 9 /* Table Name NULL */ -#define SQLITE_DROP_INDEX 10 /* Index Name Table Name */ -#define SQLITE_DROP_TABLE 11 /* Table Name NULL */ -#define SQLITE_DROP_TEMP_INDEX 12 /* Index Name Table Name */ -#define SQLITE_DROP_TEMP_TABLE 13 /* Table Name NULL */ -#define SQLITE_DROP_TEMP_TRIGGER 14 /* Trigger Name Table Name */ -#define SQLITE_DROP_TEMP_VIEW 15 /* View Name NULL */ -#define SQLITE_DROP_TRIGGER 16 /* Trigger Name Table Name */ -#define SQLITE_DROP_VIEW 17 /* View Name NULL */ -#define SQLITE_INSERT 18 /* Table Name NULL */ -#define SQLITE_PRAGMA 19 /* Pragma Name 1st arg or NULL */ -#define SQLITE_READ 20 /* Table Name Column Name */ -#define SQLITE_SELECT 21 /* NULL NULL */ -#define SQLITE_TRANSACTION 22 /* NULL NULL */ -#define SQLITE_UPDATE 23 /* Table Name Column Name */ -#define SQLITE_ATTACH 24 /* Filename NULL */ -#define SQLITE_DETACH 25 /* Database Name NULL */ -#define SQLITE_ALTER_TABLE 26 /* Database Name Table Name */ -#define SQLITE_REINDEX 27 /* Index Name NULL */ -#define SQLITE_ANALYZE 28 /* Table Name NULL */ -#define SQLITE_CREATE_VTABLE 29 /* Table Name Module Name */ -#define SQLITE_DROP_VTABLE 30 /* Table Name Module Name */ -#define SQLITE_FUNCTION 31 /* Function Name NULL */ -#define SQLITE_COPY 0 /* No longer used */ - -/* -** CAPI3REF: Tracing And Profiling Functions {F12280} -** -** These routines register callback functions that can be used for -** tracing and profiling the execution of SQL statements. -** -** The callback function registered by sqlite3_trace() is invoked at -** various times when an SQL statement is being run by [sqlite3_step()]. -** The callback returns a UTF-8 rendering of the SQL statement text -** as the statement first begins executing. Additional callbacks occur -** as each triggersubprogram is entered. The callbacks for triggers -** contain a UTF-8 SQL comment that identifies the trigger. -** -** The callback function registered by sqlite3_profile() is invoked -** as each SQL statement finishes. The profile callback contains -** the original statement text and an estimate of wall-clock time -** of how long that statement took to run. -** -** The sqlite3_profile() API is currently considered experimental and -** is subject to change or removal in a future release. -** -** The trigger reporting feature of the trace callback is considered -** experimental and is subject to change or removal in future releases. -** Future versions of SQLite might also add new trace callback -** invocations. -** -** INVARIANTS: -** -** {F12281} The callback function registered by [sqlite3_trace()] is -** whenever an SQL statement first begins to execute and -** whenever a trigger subprogram first begins to run. -** -** {F12282} Each call to [sqlite3_trace()] overrides the previously -** registered trace callback. -** -** {F12283} A NULL trace callback disables tracing. -** -** {F12284} The first argument to the trace callback is a copy of -** the pointer which was the 3rd argument to [sqlite3_trace()]. -** -** {F12285} The second argument to the trace callback is a -** zero-terminated UTF8 string containing the original text -** of the SQL statement as it was passed into [sqlite3_prepare_v2()] -** or the equivalent, or an SQL comment indicating the beginning -** of a trigger subprogram. -** -** {F12287} The callback function registered by [sqlite3_profile()] is invoked -** as each SQL statement finishes. -** -** {F12288} The first parameter to the profile callback is a copy of -** the 3rd parameter to [sqlite3_profile()]. -** -** {F12289} The second parameter to the profile callback is a -** zero-terminated UTF-8 string that contains the complete text of -** the SQL statement as it was processed by [sqlite3_prepare_v2()] -** or the equivalent. -** -** {F12290} The third parameter to the profile callback is an estimate -** of the number of nanoseconds of wall-clock time required to -** run the SQL statement from start to finish. -*/ -SQLITE_API void *sqlite3_trace(sqlite3*, void(*xTrace)(void*,const char*), void*); -SQLITE_API void *sqlite3_profile(sqlite3*, - void(*xProfile)(void*,const char*,sqlite3_uint64), void*); - -/* -** CAPI3REF: Query Progress Callbacks {F12910} -** -** This routine configures a callback function - the -** progress callback - that is invoked periodically during long -** running calls to [sqlite3_exec()], [sqlite3_step()] and -** [sqlite3_get_table()]. An example use for this -** interface is to keep a GUI updated during a large query. -** -** If the progress callback returns non-zero, the opertion is -** interrupted. This feature can be used to implement a -** "Cancel" button on a GUI dialog box. -** -** INVARIANTS: -** -** {F12911} The callback function registered by [sqlite3_progress_handler()] -** is invoked periodically during long running calls to -** [sqlite3_step()]. -** -** {F12912} The progress callback is invoked once for every N virtual -** machine opcodes, where N is the second argument to -** the [sqlite3_progress_handler()] call that registered -** the callback. What if N is less than 1? -** -** {F12913} The progress callback itself is identified by the third -** argument to [sqlite3_progress_handler()]. -** -** {F12914} The fourth argument [sqlite3_progress_handler()] is a -*** void pointer passed to the progress callback -** function each time it is invoked. -** -** {F12915} If a call to [sqlite3_step()] results in fewer than -** N opcodes being executed, -** then the progress callback is never invoked. {END} -** -** {F12916} Every call to [sqlite3_progress_handler()] -** overwrites any previously registere progress handler. -** -** {F12917} If the progress handler callback is NULL then no progress -** handler is invoked. -** -** {F12918} If the progress callback returns a result other than 0, then -** the behavior is a if [sqlite3_interrupt()] had been called. -*/ -SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*); - -/* -** CAPI3REF: Opening A New Database Connection {F12700} -** -** These routines open an SQLite database file whose name -** is given by the filename argument. -** The filename argument is interpreted as UTF-8 -** for [sqlite3_open()] and [sqlite3_open_v2()] and as UTF-16 -** in the native byte order for [sqlite3_open16()]. -** An [sqlite3*] handle is usually returned in *ppDb, even -** if an error occurs. The only exception is if SQLite is unable -** to allocate memory to hold the [sqlite3] object, a NULL will -** be written into *ppDb instead of a pointer to the [sqlite3] object. -** If the database is opened (and/or created) -** successfully, then [SQLITE_OK] is returned. Otherwise an -** error code is returned. The -** [sqlite3_errmsg()] or [sqlite3_errmsg16()] routines can be used to obtain -** an English language description of the error. -** -** The default encoding for the database will be UTF-8 if -** [sqlite3_open()] or [sqlite3_open_v2()] is called and -** UTF-16 in the native byte order if [sqlite3_open16()] is used. -** -** Whether or not an error occurs when it is opened, resources -** associated with the [sqlite3*] handle should be released by passing it -** to [sqlite3_close()] when it is no longer required. -** -** The [sqlite3_open_v2()] interface works like [sqlite3_open()] -** except that it acccepts two additional parameters for additional control -** over the new database connection. The flags parameter can be -** one of: -** -**
    -**
  1. [SQLITE_OPEN_READONLY] -**
  2. [SQLITE_OPEN_READWRITE] -**
  3. [SQLITE_OPEN_READWRITE] | [SQLITE_OPEN_CREATE] -**
-** -** The first value opens the database read-only. -** If the database does not previously exist, an error is returned. -** The second option opens -** the database for reading and writing if possible, or reading only if -** if the file is write protected. In either case the database -** must already exist or an error is returned. The third option -** opens the database for reading and writing and creates it if it does -** not already exist. -** The third options is behavior that is always used for [sqlite3_open()] -** and [sqlite3_open16()]. -** -** If the 3rd parameter to [sqlite3_open_v2()] is not one of the -** combinations shown above then the behavior is undefined. -** -** If the filename is ":memory:", then an private -** in-memory database is created for the connection. This in-memory -** database will vanish when the database connection is closed. Future -** version of SQLite might make use of additional special filenames -** that begin with the ":" character. It is recommended that -** when a database filename really does begin with -** ":" that you prefix the filename with a pathname like "./" to -** avoid ambiguity. -** -** If the filename is an empty string, then a private temporary -** on-disk database will be created. This private database will be -** automatically deleted as soon as the database connection is closed. -** -** The fourth parameter to sqlite3_open_v2() is the name of the -** [sqlite3_vfs] object that defines the operating system -** interface that the new database connection should use. If the -** fourth parameter is a NULL pointer then the default [sqlite3_vfs] -** object is used. -** -** Note to windows users: The encoding used for the filename argument -** of [sqlite3_open()] and [sqlite3_open_v2()] must be UTF-8, not whatever -** codepage is currently defined. Filenames containing international -** characters must be converted to UTF-8 prior to passing them into -** [sqlite3_open()] or [sqlite3_open_v2()]. -** -** INVARIANTS: -** -** {F12701} The [sqlite3_open()], [sqlite3_open16()], and -** [sqlite3_open_v2()] interfaces create a new -** [database connection] associated with -** the database file given in their first parameter. -** -** {F12702} The filename argument is interpreted as UTF-8 -** for [sqlite3_open()] and [sqlite3_open_v2()] and as UTF-16 -** in the native byte order for [sqlite3_open16()]. -** -** {F12703} A successful invocation of [sqlite3_open()], [sqlite3_open16()], -** or [sqlite3_open_v2()] writes a pointer to a new -** [database connection] into *ppDb. -** -** {F12704} The [sqlite3_open()], [sqlite3_open16()], and -** [sqlite3_open_v2()] interfaces return [SQLITE_OK] upon success, -** or an appropriate [error code] on failure. -** -** {F12706} The default text encoding for a new database created using -** [sqlite3_open()] or [sqlite3_open_v2()] will be UTF-8. -** -** {F12707} The default text encoding for a new database created using -** [sqlite3_open16()] will be UTF-16. -** -** {F12709} The [sqlite3_open(F,D)] interface is equivalent to -** [sqlite3_open_v2(F,D,G,0)] where the G parameter is -** [SQLITE_OPEN_READWRITE]|[SQLITE_OPEN_CREATE]. -** -** {F12711} If the G parameter to [sqlite3_open_v2(F,D,G,V)] contains the -** bit value [SQLITE_OPEN_READONLY] then the database is opened -** for reading only. -** -** {F12712} If the G parameter to [sqlite3_open_v2(F,D,G,V)] contains the -** bit value [SQLITE_OPEN_READWRITE] then the database is opened -** reading and writing if possible, or for reading only if the -** file is write protected by the operating system. -** -** {F12713} If the G parameter to [sqlite3_open(v2(F,D,G,V)] omits the -** bit value [SQLITE_OPEN_CREATE] and the database does not -** previously exist, an error is returned. -** -** {F12714} If the G parameter to [sqlite3_open(v2(F,D,G,V)] contains the -** bit value [SQLITE_OPEN_CREATE] and the database does not -** previously exist, then an attempt is made to create and -** initialize the database. -** -** {F12717} If the filename argument to [sqlite3_open()], [sqlite3_open16()], -** or [sqlite3_open_v2()] is ":memory:", then an private, -** ephemeral, in-memory database is created for the connection. -** Is SQLITE_OPEN_CREATE|SQLITE_OPEN_READWRITE required -** in sqlite3_open_v2()? -** -** {F12719} If the filename is NULL or an empty string, then a private, -** ephermeral on-disk database will be created. -** Is SQLITE_OPEN_CREATE|SQLITE_OPEN_READWRITE required -** in sqlite3_open_v2()? -** -** {F12721} The [database connection] created by -** [sqlite3_open_v2(F,D,G,V)] will use the -** [sqlite3_vfs] object identified by the V parameter, or -** the default [sqlite3_vfs] object is V is a NULL pointer. -*/ -SQLITE_API int sqlite3_open( - const char *filename, /* Database filename (UTF-8) */ - sqlite3 **ppDb /* OUT: SQLite db handle */ -); -SQLITE_API int sqlite3_open16( - const void *filename, /* Database filename (UTF-16) */ - sqlite3 **ppDb /* OUT: SQLite db handle */ -); -SQLITE_API int sqlite3_open_v2( - const char *filename, /* Database filename (UTF-8) */ - sqlite3 **ppDb, /* OUT: SQLite db handle */ - int flags, /* Flags */ - const char *zVfs /* Name of VFS module to use */ -); - -/* -** CAPI3REF: Error Codes And Messages {F12800} -** -** The sqlite3_errcode() interface returns the numeric -** [SQLITE_OK | result code] or [SQLITE_IOERR_READ | extended result code] -** for the most recent failed sqlite3_* API call associated -** with [sqlite3] handle 'db'. If a prior API call failed but the -** most recent API call succeeded, the return value from sqlite3_errcode() -** is undefined. -** -** The sqlite3_errmsg() and sqlite3_errmsg16() return English-language -** text that describes the error, as either UTF8 or UTF16 respectively. -** Memory to hold the error message string is managed internally. -** The application does not need to worry with freeing the result. -** However, the error string might be overwritten or deallocated by -** subsequent calls to other SQLite interface functions. -** -** INVARIANTS: -** -** {F12801} The [sqlite3_errcode(D)] interface returns the numeric -** [SQLITE_OK | result code] or -** [SQLITE_IOERR_READ | extended result code] -** for the most recently failed interface call associated -** with [database connection] D. -** -** {F12803} The [sqlite3_errmsg(D)] and [sqlite3_errmsg16(D)] -** interfaces return English-language text that describes -** the error in the mostly recently failed interface call, -** encoded as either UTF8 or UTF16 respectively. -** -** {F12807} The strings returned by [sqlite3_errmsg()] and [sqlite3_errmsg16()] -** are valid until the next SQLite interface call. -** -** {F12808} Calls to API routines that do not return an error code -** (example: [sqlite3_data_count()]) do not -** change the error code or message returned by -** [sqlite3_errcode()], [sqlite3_errmsg()], or [sqlite3_errmsg16()]. -** -** {F12809} Interfaces that are not associated with a specific -** [database connection] (examples: -** [sqlite3_mprintf()] or [sqlite3_enable_shared_cache()] -** do not change the values returned by -** [sqlite3_errcode()], [sqlite3_errmsg()], or [sqlite3_errmsg16()]. -*/ -SQLITE_API int sqlite3_errcode(sqlite3 *db); -SQLITE_API const char *sqlite3_errmsg(sqlite3*); -SQLITE_API const void *sqlite3_errmsg16(sqlite3*); - -/* -** CAPI3REF: SQL Statement Object {F13000} -** KEYWORDS: {prepared statement} {prepared statements} -** -** An instance of this object represent single SQL statements. This -** object is variously known as a "prepared statement" or a -** "compiled SQL statement" or simply as a "statement". -** -** The life of a statement object goes something like this: -** -**
    -**
  1. Create the object using [sqlite3_prepare_v2()] or a related -** function. -**
  2. Bind values to host parameters using -** [sqlite3_bind_blob | sqlite3_bind_* interfaces]. -**
  3. Run the SQL by calling [sqlite3_step()] one or more times. -**
  4. Reset the statement using [sqlite3_reset()] then go back -** to step 2. Do this zero or more times. -**
  5. Destroy the object using [sqlite3_finalize()]. -**
-** -** Refer to documentation on individual methods above for additional -** information. -*/ -typedef struct sqlite3_stmt sqlite3_stmt; - -/* -** CAPI3REF: Run-time Limits {F12760} -** -** This interface allows the size of various constructs to be limited -** on a connection by connection basis. The first parameter is the -** [database connection] whose limit is to be set or queried. The -** second parameter is one of the [limit categories] that define a -** class of constructs to be size limited. The third parameter is the -** new limit for that construct. The function returns the old limit. -** -** If the new limit is a negative number, the limit is unchanged. -** For the limit category of SQLITE_LIMIT_XYZ there is a hard upper -** bound set by a compile-time C-preprocess macro named SQLITE_MAX_XYZ. -** (The "_LIMIT_" in the name is changed to "_MAX_".) -** Attempts to increase a limit above its hard upper bound are -** silently truncated to the hard upper limit. -** -** Run time limits are intended for use in applications that manage -** both their own internal database and also databases that are controlled -** by untrusted external sources. An example application might be a -** webbrowser that has its own databases for storing history and -** separate databases controlled by javascript applications downloaded -** off the internet. The internal databases can be given the -** large, default limits. Databases managed by external sources can -** be given much smaller limits designed to prevent a denial of service -** attach. Developers might also want to use the [sqlite3_set_authorizer()] -** interface to further control untrusted SQL. The size of the database -** created by an untrusted script can be contained using the -** [max_page_count] [PRAGMA]. -** -** This interface is currently considered experimental and is subject -** to change or removal without prior notice. -** -** INVARIANTS: -** -** {F12762} A successful call to [sqlite3_limit(D,C,V)] where V is -** positive changes the -** limit on the size of construct C in [database connection] D -** to the lessor of V and the hard upper bound on the size -** of C that is set at compile-time. -** -** {F12766} A successful call to [sqlite3_limit(D,C,V)] where V is negative -** leaves the state of [database connection] D unchanged. -** -** {F12769} A successful call to [sqlite3_limit(D,C,V)] returns the -** value of the limit on the size of construct C in -** in [database connection] D as it was prior to the call. -*/ -SQLITE_API int sqlite3_limit(sqlite3*, int id, int newVal); - -/* -** CAPI3REF: Run-Time Limit Categories {F12790} -** KEYWORDS: {limit category} {limit categories} -** -** These constants define various aspects of a [database connection] -** that can be limited in size by calls to [sqlite3_limit()]. -** The meanings of the various limits are as follows: -** -**
-**
SQLITE_LIMIT_LENGTH
-**
The maximum size of any -** string or blob or table row.
-** -**
SQLITE_LIMIT_SQL_LENGTH
-**
The maximum length of an SQL statement.
-** -**
SQLITE_LIMIT_COLUMN
-**
The maximum number of columns in a table definition or in the -** result set of a SELECT or the maximum number of columns in an index -** or in an ORDER BY or GROUP BY clause.
-** -**
SQLITE_LIMIT_EXPR_DEPTH
-**
The maximum depth of the parse tree on any expression.
-** -**
SQLITE_LIMIT_COMPOUND_SELECT
-**
The maximum number of terms in a compound SELECT statement.
-** -**
SQLITE_LIMIT_VDBE_OP
-**
The maximum number of instructions in a virtual machine program -** used to implement an SQL statement.
-** -**
SQLITE_LIMIT_FUNCTION_ARG
-**
The maximum number of arguments on a function.
-** -**
SQLITE_LIMIT_ATTACHED
-**
The maximum number of attached databases.
-** -**
SQLITE_LIMIT_LIKE_PATTERN_LENGTH
-**
The maximum length of the pattern argument to the LIKE or -** GLOB operators.
-** -**
SQLITE_LIMIT_VARIABLE_NUMBER
-**
The maximum number of variables in an SQL statement that can -** be bound.
-**
-*/ -#define SQLITE_LIMIT_LENGTH 0 -#define SQLITE_LIMIT_SQL_LENGTH 1 -#define SQLITE_LIMIT_COLUMN 2 -#define SQLITE_LIMIT_EXPR_DEPTH 3 -#define SQLITE_LIMIT_COMPOUND_SELECT 4 -#define SQLITE_LIMIT_VDBE_OP 5 -#define SQLITE_LIMIT_FUNCTION_ARG 6 -#define SQLITE_LIMIT_ATTACHED 7 -#define SQLITE_LIMIT_LIKE_PATTERN_LENGTH 8 -#define SQLITE_LIMIT_VARIABLE_NUMBER 9 - -/* -** CAPI3REF: Compiling An SQL Statement {F13010} -** -** To execute an SQL query, it must first be compiled into a byte-code -** program using one of these routines. -** -** The first argument "db" is an [database connection] -** obtained from a prior call to [sqlite3_open()], [sqlite3_open_v2()] -** or [sqlite3_open16()]. -** The second argument "zSql" is the statement to be compiled, encoded -** as either UTF-8 or UTF-16. The sqlite3_prepare() and sqlite3_prepare_v2() -** interfaces uses UTF-8 and sqlite3_prepare16() and sqlite3_prepare16_v2() -** use UTF-16. {END} -** -** If the nByte argument is less -** than zero, then zSql is read up to the first zero terminator. -** If nByte is non-negative, then it is the maximum number of -** bytes read from zSql. When nByte is non-negative, the -** zSql string ends at either the first '\000' or '\u0000' character or -** the nByte-th byte, whichever comes first. If the caller knows -** that the supplied string is nul-terminated, then there is a small -** performance advantage to be had by passing an nByte parameter that -** is equal to the number of bytes in the input string including -** the nul-terminator bytes.{END} -** -** *pzTail is made to point to the first byte past the end of the -** first SQL statement in zSql. These routines only compiles the first -** statement in zSql, so *pzTail is left pointing to what remains -** uncompiled. -** -** *ppStmt is left pointing to a compiled [prepared statement] that can be -** executed using [sqlite3_step()]. Or if there is an error, *ppStmt is -** set to NULL. If the input text contains no SQL (if the input -** is and empty string or a comment) then *ppStmt is set to NULL. -** {U13018} The calling procedure is responsible for deleting the -** compiled SQL statement -** using [sqlite3_finalize()] after it has finished with it. -** -** On success, [SQLITE_OK] is returned. Otherwise an -** [error code] is returned. -** -** The sqlite3_prepare_v2() and sqlite3_prepare16_v2() interfaces are -** recommended for all new programs. The two older interfaces are retained -** for backwards compatibility, but their use is discouraged. -** In the "v2" interfaces, the prepared statement -** that is returned (the [sqlite3_stmt] object) contains a copy of the -** original SQL text. {END} This causes the [sqlite3_step()] interface to -** behave a differently in two ways: -** -**
    -**
  1. -** If the database schema changes, instead of returning [SQLITE_SCHEMA] as it -** always used to do, [sqlite3_step()] will automatically recompile the SQL -** statement and try to run it again. If the schema has changed in -** a way that makes the statement no longer valid, [sqlite3_step()] will still -** return [SQLITE_SCHEMA]. But unlike the legacy behavior, -** [SQLITE_SCHEMA] is now a fatal error. Calling -** [sqlite3_prepare_v2()] again will not make the -** error go away. Note: use [sqlite3_errmsg()] to find the text -** of the parsing error that results in an [SQLITE_SCHEMA] return. {END} -**
    2. -** -**
  2. -** When an error occurs, -** [sqlite3_step()] will return one of the detailed -** [error codes] or [extended error codes]. -** The legacy behavior was that [sqlite3_step()] would only return a generic -** [SQLITE_ERROR] result code and you would have to make a second call to -** [sqlite3_reset()] in order to find the underlying cause of the problem. -** With the "v2" prepare interfaces, the underlying reason for the error is -** returned immediately. -**
    3. -**
-** -** INVARIANTS: -** -** {F13011} The [sqlite3_prepare(db,zSql,...)] and -** [sqlite3_prepare_v2(db,zSql,...)] interfaces interpret the -** text in their zSql parameter as UTF-8. -** -** {F13012} The [sqlite3_prepare16(db,zSql,...)] and -** [sqlite3_prepare16_v2(db,zSql,...)] interfaces interpret the -** text in their zSql parameter as UTF-16 in the native byte order. -** -** {F13013} If the nByte argument to [sqlite3_prepare_v2(db,zSql,nByte,...)] -** and its variants is less than zero, then SQL text is -** read from zSql is read up to the first zero terminator. -** -** {F13014} If the nByte argument to [sqlite3_prepare_v2(db,zSql,nByte,...)] -** and its variants is non-negative, then at most nBytes bytes -** SQL text is read from zSql. -** -** {F13015} In [sqlite3_prepare_v2(db,zSql,N,P,pzTail)] and its variants -** if the zSql input text contains more than one SQL statement -** and pzTail is not NULL, then *pzTail is made to point to the -** first byte past the end of the first SQL statement in zSql. -** What does *pzTail point to if there is one statement? -** -** {F13016} A successful call to [sqlite3_prepare_v2(db,zSql,N,ppStmt,...)] -** or one of its variants writes into *ppStmt a pointer to a new -** [prepared statement] or a pointer to NULL -** if zSql contains nothing other than whitespace or comments. -** -** {F13019} The [sqlite3_prepare_v2()] interface and its variants return -** [SQLITE_OK] or an appropriate [error code] upon failure. -** -** {F13021} Before [sqlite3_prepare(db,zSql,nByte,ppStmt,pzTail)] or its -** variants returns an error (any value other than [SQLITE_OK]) -** it first sets *ppStmt to NULL. -*/ -SQLITE_API int sqlite3_prepare( - sqlite3 *db, /* Database handle */ - const char *zSql, /* SQL statement, UTF-8 encoded */ - int nByte, /* Maximum length of zSql in bytes. */ - sqlite3_stmt **ppStmt, /* OUT: Statement handle */ - const char **pzTail /* OUT: Pointer to unused portion of zSql */ -); -SQLITE_API int sqlite3_prepare_v2( - sqlite3 *db, /* Database handle */ - const char *zSql, /* SQL statement, UTF-8 encoded */ - int nByte, /* Maximum length of zSql in bytes. */ - sqlite3_stmt **ppStmt, /* OUT: Statement handle */ - const char **pzTail /* OUT: Pointer to unused portion of zSql */ -); -SQLITE_API int sqlite3_prepare16( - sqlite3 *db, /* Database handle */ - const void *zSql, /* SQL statement, UTF-16 encoded */ - int nByte, /* Maximum length of zSql in bytes. */ - sqlite3_stmt **ppStmt, /* OUT: Statement handle */ - const void **pzTail /* OUT: Pointer to unused portion of zSql */ -); -SQLITE_API int sqlite3_prepare16_v2( - sqlite3 *db, /* Database handle */ - const void *zSql, /* SQL statement, UTF-16 encoded */ - int nByte, /* Maximum length of zSql in bytes. */ - sqlite3_stmt **ppStmt, /* OUT: Statement handle */ - const void **pzTail /* OUT: Pointer to unused portion of zSql */ -); - -/* -** CAPIREF: Retrieving Statement SQL {F13100} -** -** This intereface can be used to retrieve a saved copy of the original -** SQL text used to create a [prepared statement]. -** -** INVARIANTS: -** -** {F13101} If the [prepared statement] passed as -** the an argument to [sqlite3_sql()] was compiled -** compiled using either [sqlite3_prepare_v2()] or -** [sqlite3_prepare16_v2()], -** then [sqlite3_sql()] function returns a pointer to a -** zero-terminated string containing a UTF-8 rendering -** of the original SQL statement. -** -** {F13102} If the [prepared statement] passed as -** the an argument to [sqlite3_sql()] was compiled -** compiled using either [sqlite3_prepare()] or -** [sqlite3_prepare16()], -** then [sqlite3_sql()] function returns a NULL pointer. -** -** {F13103} The string returned by [sqlite3_sql(S)] is valid until the -** [prepared statement] S is deleted using [sqlite3_finalize(S)]. -*/ -SQLITE_API const char *sqlite3_sql(sqlite3_stmt *pStmt); - -/* -** CAPI3REF: Dynamically Typed Value Object {F15000} -** KEYWORDS: {protected sqlite3_value} {unprotected sqlite3_value} -** -** SQLite uses the sqlite3_value object to represent all values -** that can be stored in a database table. -** SQLite uses dynamic typing for the values it stores. -** Values stored in sqlite3_value objects can be -** be integers, floating point values, strings, BLOBs, or NULL. -** -** An sqlite3_value object may be either "protected" or "unprotected". -** Some interfaces require a protected sqlite3_value. Other interfaces -** will accept either a protected or an unprotected sqlite3_value. -** Every interface that accepts sqlite3_value arguments specifies -** whether or not it requires a protected sqlite3_value. -** -** The terms "protected" and "unprotected" refer to whether or not -** a mutex is held. A internal mutex is held for a protected -** sqlite3_value object but no mutex is held for an unprotected -** sqlite3_value object. If SQLite is compiled to be single-threaded -** (with SQLITE_THREADSAFE=0 and with [sqlite3_threadsafe()] returning 0) -** then there is no distinction between -** protected and unprotected sqlite3_value objects and they can be -** used interchangable. However, for maximum code portability it -** is recommended that applications make the distinction between -** between protected and unprotected sqlite3_value objects even if -** they are single threaded. -** -** The sqlite3_value objects that are passed as parameters into the -** implementation of application-defined SQL functions are protected. -** The sqlite3_value object returned by -** [sqlite3_column_value()] is unprotected. -** Unprotected sqlite3_value objects may only be used with -** [sqlite3_result_value()] and [sqlite3_bind_value()]. All other -** interfaces that use sqlite3_value require protected sqlite3_value objects. -*/ -typedef struct Mem sqlite3_value; - -/* -** CAPI3REF: SQL Function Context Object {F16001} -** -** The context in which an SQL function executes is stored in an -** sqlite3_context object. A pointer to an sqlite3_context -** object is always first parameter to application-defined SQL functions. -*/ -typedef struct sqlite3_context sqlite3_context; - -/* -** CAPI3REF: Binding Values To Prepared Statements {F13500} -** -** In the SQL strings input to [sqlite3_prepare_v2()] and its -** variants, literals may be replace by a parameter in one -** of these forms: -** -**
    -**
  • ? -**
  • ?NNN -**
  • :VVV -**
  • @VVV -**
  • $VVV -**
-** -** In the parameter forms shown above NNN is an integer literal, -** VVV alpha-numeric parameter name. -** The values of these parameters (also called "host parameter names" -** or "SQL parameters") -** can be set using the sqlite3_bind_*() routines defined here. -** -** The first argument to the sqlite3_bind_*() routines always -** is a pointer to the [sqlite3_stmt] object returned from -** [sqlite3_prepare_v2()] or its variants. The second -** argument is the index of the parameter to be set. The -** first parameter has an index of 1. When the same named -** parameter is used more than once, second and subsequent -** occurrences have the same index as the first occurrence. -** The index for named parameters can be looked up using the -** [sqlite3_bind_parameter_name()] API if desired. The index -** for "?NNN" parameters is the value of NNN. -** The NNN value must be between 1 and the compile-time -** parameter SQLITE_MAX_VARIABLE_NUMBER (default value: 999). -** -** The third argument is the value to bind to the parameter. -** -** In those -** routines that have a fourth argument, its value is the number of bytes -** in the parameter. To be clear: the value is the number of bytes -** in the value, not the number of characters. -** If the fourth parameter is negative, the length of the string is -** number of bytes up to the first zero terminator. -** -** The fifth argument to sqlite3_bind_blob(), sqlite3_bind_text(), and -** sqlite3_bind_text16() is a destructor used to dispose of the BLOB or -** string after SQLite has finished with it. If the fifth argument is -** the special value [SQLITE_STATIC], then SQLite assumes that the -** information is in static, unmanaged space and does not need to be freed. -** If the fifth argument has the value [SQLITE_TRANSIENT], then -** SQLite makes its own private copy of the data immediately, before -** the sqlite3_bind_*() routine returns. -** -** The sqlite3_bind_zeroblob() routine binds a BLOB of length N that -** is filled with zeros. A zeroblob uses a fixed amount of memory -** (just an integer to hold it size) while it is being processed. -** Zeroblobs are intended to serve as place-holders for BLOBs whose -** content is later written using -** [sqlite3_blob_open | increment BLOB I/O] routines. A negative -** value for the zeroblob results in a zero-length BLOB. -** -** The sqlite3_bind_*() routines must be called after -** [sqlite3_prepare_v2()] (and its variants) or [sqlite3_reset()] and -** before [sqlite3_step()]. -** Bindings are not cleared by the [sqlite3_reset()] routine. -** Unbound parameters are interpreted as NULL. -** -** These routines return [SQLITE_OK] on success or an error code if -** anything goes wrong. [SQLITE_RANGE] is returned if the parameter -** index is out of range. [SQLITE_NOMEM] is returned if malloc fails. -** [SQLITE_MISUSE] might be returned if these routines are called on a -** virtual machine that is the wrong state or which has already been finalized. -** Detection of misuse is unreliable. Applications should not depend -** on SQLITE_MISUSE returns. SQLITE_MISUSE is intended to indicate a -** a logic error in the application. Future versions of SQLite might -** panic rather than return SQLITE_MISUSE. -** -** See also: [sqlite3_bind_parameter_count()], -** [sqlite3_bind_parameter_name()], and -** [sqlite3_bind_parameter_index()]. -** -** INVARIANTS: -** -** {F13506} The [sqlite3_prepare | SQL statement compiler] recognizes -** tokens of the forms "?", "?NNN", "$VVV", ":VVV", and "@VVV" -** as SQL parameters, where NNN is any sequence of one or more -** digits and where VVV is any sequence of one or more -** alphanumeric characters or "::" optionally followed by -** a string containing no spaces and contained within parentheses. -** -** {F13509} The initial value of an SQL parameter is NULL. -** -** {F13512} The index of an "?" SQL parameter is one larger than the -** largest index of SQL parameter to the left, or 1 if -** the "?" is the leftmost SQL parameter. -** -** {F13515} The index of an "?NNN" SQL parameter is the integer NNN. -** -** {F13518} The index of an ":VVV", "$VVV", or "@VVV" SQL parameter is -** the same as the index of leftmost occurances of the same -** parameter, or one more than the largest index over all -** parameters to the left if this is the first occurrance -** of this parameter, or 1 if this is the leftmost parameter. -** -** {F13521} The [sqlite3_prepare | SQL statement compiler] fail with -** an [SQLITE_RANGE] error if the index of an SQL parameter -** is less than 1 or greater than SQLITE_MAX_VARIABLE_NUMBER. -** -** {F13524} Calls to [sqlite3_bind_text | sqlite3_bind(S,N,V,...)] -** associate the value V with all SQL parameters having an -** index of N in the [prepared statement] S. -** -** {F13527} Calls to [sqlite3_bind_text | sqlite3_bind(S,N,...)] -** override prior calls with the same values of S and N. -** -** {F13530} Bindings established by [sqlite3_bind_text | sqlite3_bind(S,...)] -** persist across calls to [sqlite3_reset(S)]. -** -** {F13533} In calls to [sqlite3_bind_blob(S,N,V,L,D)], -** [sqlite3_bind_text(S,N,V,L,D)], or -** [sqlite3_bind_text16(S,N,V,L,D)] SQLite binds the first L -** bytes of the blob or string pointed to by V, when L -** is non-negative. -** -** {F13536} In calls to [sqlite3_bind_text(S,N,V,L,D)] or -** [sqlite3_bind_text16(S,N,V,L,D)] SQLite binds characters -** from V through the first zero character when L is negative. -** -** {F13539} In calls to [sqlite3_bind_blob(S,N,V,L,D)], -** [sqlite3_bind_text(S,N,V,L,D)], or -** [sqlite3_bind_text16(S,N,V,L,D)] when D is the special -** constant [SQLITE_STATIC], SQLite assumes that the value V -** is held in static unmanaged space that will not change -** during the lifetime of the binding. -** -** {F13542} In calls to [sqlite3_bind_blob(S,N,V,L,D)], -** [sqlite3_bind_text(S,N,V,L,D)], or -** [sqlite3_bind_text16(S,N,V,L,D)] when D is the special -** constant [SQLITE_TRANSIENT], the routine makes a -** private copy of V value before it returns. -** -** {F13545} In calls to [sqlite3_bind_blob(S,N,V,L,D)], -** [sqlite3_bind_text(S,N,V,L,D)], or -** [sqlite3_bind_text16(S,N,V,L,D)] when D is a pointer to -** a function, SQLite invokes that function to destroy the -** V value after it has finished using the V value. -** -** {F13548} In calls to [sqlite3_bind_zeroblob(S,N,V,L)] the value bound -** is a blob of L bytes, or a zero-length blob if L is negative. -** -** {F13551} In calls to [sqlite3_bind_value(S,N,V)] the V argument may -** be either a [protected sqlite3_value] object or an -** [unprotected sqlite3_value] object. -*/ -SQLITE_API int sqlite3_bind_blob(sqlite3_stmt*, int, const void*, int n, void(*)(void*)); -SQLITE_API int sqlite3_bind_double(sqlite3_stmt*, int, double); -SQLITE_API int sqlite3_bind_int(sqlite3_stmt*, int, int); -SQLITE_API int sqlite3_bind_int64(sqlite3_stmt*, int, sqlite3_int64); -SQLITE_API int sqlite3_bind_null(sqlite3_stmt*, int); -SQLITE_API int sqlite3_bind_text(sqlite3_stmt*, int, const char*, int n, void(*)(void*)); -SQLITE_API int sqlite3_bind_text16(sqlite3_stmt*, int, const void*, int, void(*)(void*)); -SQLITE_API int sqlite3_bind_value(sqlite3_stmt*, int, const sqlite3_value*); -SQLITE_API int sqlite3_bind_zeroblob(sqlite3_stmt*, int, int n); - -/* -** CAPI3REF: Number Of SQL Parameters {F13600} -** -** This routine can be used to find the number of SQL parameters -** in a prepared statement. SQL parameters are tokens of the -** form "?", "?NNN", ":AAA", "$AAA", or "@AAA" that serve as -** place-holders for values that are [sqlite3_bind_blob | bound] -** to the parameters at a later time. -** -** This routine actually returns the index of the largest parameter. -** For all forms except ?NNN, this will correspond to the number of -** unique parameters. If parameters of the ?NNN are used, there may -** be gaps in the list. -** -** See also: [sqlite3_bind_blob|sqlite3_bind()], -** [sqlite3_bind_parameter_name()], and -** [sqlite3_bind_parameter_index()]. -** -** INVARIANTS: -** -** {F13601} The [sqlite3_bind_parameter_count(S)] interface returns -** the largest index of all SQL parameters in the -** [prepared statement] S, or 0 if S -** contains no SQL parameters. -*/ -SQLITE_API int sqlite3_bind_parameter_count(sqlite3_stmt*); - -/* -** CAPI3REF: Name Of A Host Parameter {F13620} -** -** This routine returns a pointer to the name of the n-th -** SQL parameter in a [prepared statement]. -** SQL parameters of the form "?NNN" or ":AAA" or "@AAA" or "$AAA" -** have a name which is the string "?NNN" or ":AAA" or "@AAA" or "$AAA" -** respectively. -** In other words, the initial ":" or "$" or "@" or "?" -** is included as part of the name. -** Parameters of the form "?" without a following integer have no name. -** -** The first host parameter has an index of 1, not 0. -** -** If the value n is out of range or if the n-th parameter is -** nameless, then NULL is returned. The returned string is -** always in the UTF-8 encoding even if the named parameter was -** originally specified as UTF-16 in [sqlite3_prepare16()] or -** [sqlite3_prepare16_v2()]. -** -** See also: [sqlite3_bind_blob|sqlite3_bind()], -** [sqlite3_bind_parameter_count()], and -** [sqlite3_bind_parameter_index()]. -** -** INVARIANTS: -** -** {F13621} The [sqlite3_bind_parameter_name(S,N)] interface returns -** a UTF-8 rendering of the name of the SQL parameter in -** [prepared statement] S having index N, or -** NULL if there is no SQL parameter with index N or if the -** parameter with index N is an anonymous parameter "?". -*/ -SQLITE_API const char *sqlite3_bind_parameter_name(sqlite3_stmt*, int); - -/* -** CAPI3REF: Index Of A Parameter With A Given Name {F13640} -** -** Return the index of an SQL parameter given its name. The -** index value returned is suitable for use as the second -** parameter to [sqlite3_bind_blob|sqlite3_bind()]. A zero -** is returned if no matching parameter is found. The parameter -** name must be given in UTF-8 even if the original statement -** was prepared from UTF-16 text using [sqlite3_prepare16_v2()]. -** -** See also: [sqlite3_bind_blob|sqlite3_bind()], -** [sqlite3_bind_parameter_count()], and -** [sqlite3_bind_parameter_index()]. -** -** INVARIANTS: -** -** {F13641} The [sqlite3_bind_parameter_index(S,N)] interface returns -** the index of SQL parameter in [prepared statement] -** S whose name matches the UTF-8 string N, or 0 if there is -** no match. -*/ -SQLITE_API int sqlite3_bind_parameter_index(sqlite3_stmt*, const char *zName); - -/* -** CAPI3REF: Reset All Bindings On A Prepared Statement {F13660} -** -** Contrary to the intuition of many, [sqlite3_reset()] does not -** reset the [sqlite3_bind_blob | bindings] on a -** [prepared statement]. Use this routine to -** reset all host parameters to NULL. -** -** INVARIANTS: -** -** {F13661} The [sqlite3_clear_bindings(S)] interface resets all -** SQL parameter bindings in [prepared statement] S -** back to NULL. -*/ -SQLITE_API int sqlite3_clear_bindings(sqlite3_stmt*); - -/* -** CAPI3REF: Number Of Columns In A Result Set {F13710} -** -** Return the number of columns in the result set returned by the -** [prepared statement]. This routine returns 0 -** if pStmt is an SQL statement that does not return data (for -** example an UPDATE). -** -** INVARIANTS: -** -** {F13711} The [sqlite3_column_count(S)] interface returns the number of -** columns in the result set generated by the -** [prepared statement] S, or 0 if S does not generate -** a result set. -*/ -SQLITE_API int sqlite3_column_count(sqlite3_stmt *pStmt); - -/* -** CAPI3REF: Column Names In A Result Set {F13720} -** -** These routines return the name assigned to a particular column -** in the result set of a SELECT statement. The sqlite3_column_name() -** interface returns a pointer to a zero-terminated UTF8 string -** and sqlite3_column_name16() returns a pointer to a zero-terminated -** UTF16 string. The first parameter is the -** [prepared statement] that implements the SELECT statement. -** The second parameter is the column number. The left-most column is -** number 0. -** -** The returned string pointer is valid until either the -** [prepared statement] is destroyed by [sqlite3_finalize()] -** or until the next call sqlite3_column_name() or sqlite3_column_name16() -** on the same column. -** -** If sqlite3_malloc() fails during the processing of either routine -** (for example during a conversion from UTF-8 to UTF-16) then a -** NULL pointer is returned. -** -** The name of a result column is the value of the "AS" clause for -** that column, if there is an AS clause. If there is no AS clause -** then the name of the column is unspecified and may change from -** one release of SQLite to the next. -** -** INVARIANTS: -** -** {F13721} A successful invocation of the [sqlite3_column_name(S,N)] -** interface returns the name -** of the Nth column (where 0 is the left-most column) for the -** result set of [prepared statement] S as a -** zero-terminated UTF-8 string. -** -** {F13723} A successful invocation of the [sqlite3_column_name16(S,N)] -** interface returns the name -** of the Nth column (where 0 is the left-most column) for the -** result set of [prepared statement] S as a -** zero-terminated UTF-16 string in the native byte order. -** -** {F13724} The [sqlite3_column_name()] and [sqlite3_column_name16()] -** interfaces return a NULL pointer if they are unable to -** allocate memory memory to hold there normal return strings. -** -** {F13725} If the N parameter to [sqlite3_column_name(S,N)] or -** [sqlite3_column_name16(S,N)] is out of range, then the -** interfaces returns a NULL pointer. -** -** {F13726} The strings returned by [sqlite3_column_name(S,N)] and -** [sqlite3_column_name16(S,N)] are valid until the next -** call to either routine with the same S and N parameters -** or until [sqlite3_finalize(S)] is called. -** -** {F13727} When a result column of a [SELECT] statement contains -** an AS clause, the name of that column is the indentifier -** to the right of the AS keyword. -*/ -SQLITE_API const char *sqlite3_column_name(sqlite3_stmt*, int N); -SQLITE_API const void *sqlite3_column_name16(sqlite3_stmt*, int N); - -/* -** CAPI3REF: Source Of Data In A Query Result {F13740} -** -** These routines provide a means to determine what column of what -** table in which database a result of a SELECT statement comes from. -** The name of the database or table or column can be returned as -** either a UTF8 or UTF16 string. The _database_ routines return -** the database name, the _table_ routines return the table name, and -** the origin_ routines return the column name. -** The returned string is valid until -** the [prepared statement] is destroyed using -** [sqlite3_finalize()] or until the same information is requested -** again in a different encoding. -** -** The names returned are the original un-aliased names of the -** database, table, and column. -** -** The first argument to the following calls is a [prepared statement]. -** These functions return information about the Nth column returned by -** the statement, where N is the second function argument. -** -** If the Nth column returned by the statement is an expression -** or subquery and is not a column value, then all of these functions -** return NULL. These routine might also return NULL if a memory -** allocation error occurs. Otherwise, they return the -** name of the attached database, table and column that query result -** column was extracted from. -** -** As with all other SQLite APIs, those postfixed with "16" return -** UTF-16 encoded strings, the other functions return UTF-8. {END} -** -** These APIs are only available if the library was compiled with the -** SQLITE_ENABLE_COLUMN_METADATA preprocessor symbol defined. -** -** {U13751} -** If two or more threads call one or more of these routines against the same -** prepared statement and column at the same time then the results are -** undefined. -** -** INVARIANTS: -** -** {F13741} The [sqlite3_column_database_name(S,N)] interface returns either -** the UTF-8 zero-terminated name of the database from which the -** Nth result column of [prepared statement] S -** is extracted, or NULL if the the Nth column of S is a -** general expression or if unable to allocate memory -** to store the name. -** -** {F13742} The [sqlite3_column_database_name16(S,N)] interface returns either -** the UTF-16 native byte order -** zero-terminated name of the database from which the -** Nth result column of [prepared statement] S -** is extracted, or NULL if the the Nth column of S is a -** general expression or if unable to allocate memory -** to store the name. -** -** {F13743} The [sqlite3_column_table_name(S,N)] interface returns either -** the UTF-8 zero-terminated name of the table from which the -** Nth result column of [prepared statement] S -** is extracted, or NULL if the the Nth column of S is a -** general expression or if unable to allocate memory -** to store the name. -** -** {F13744} The [sqlite3_column_table_name16(S,N)] interface returns either -** the UTF-16 native byte order -** zero-terminated name of the table from which the -** Nth result column of [prepared statement] S -** is extracted, or NULL if the the Nth column of S is a -** general expression or if unable to allocate memory -** to store the name. -** -** {F13745} The [sqlite3_column_origin_name(S,N)] interface returns either -** the UTF-8 zero-terminated name of the table column from which the -** Nth result column of [prepared statement] S -** is extracted, or NULL if the the Nth column of S is a -** general expression or if unable to allocate memory -** to store the name. -** -** {F13746} The [sqlite3_column_origin_name16(S,N)] interface returns either -** the UTF-16 native byte order -** zero-terminated name of the table column from which the -** Nth result column of [prepared statement] S -** is extracted, or NULL if the the Nth column of S is a -** general expression or if unable to allocate memory -** to store the name. -** -** {F13748} The return values from -** [sqlite3_column_database_name|column metadata interfaces] -** are valid -** for the lifetime of the [prepared statement] -** or until the encoding is changed by another metadata -** interface call for the same prepared statement and column. -** -** LIMITATIONS: -** -** {U13751} If two or more threads call one or more -** [sqlite3_column_database_name|column metadata interfaces] -** the same [prepared statement] and result column -** at the same time then the results are undefined. -*/ -SQLITE_API const char *sqlite3_column_database_name(sqlite3_stmt*,int); -SQLITE_API const void *sqlite3_column_database_name16(sqlite3_stmt*,int); -SQLITE_API const char *sqlite3_column_table_name(sqlite3_stmt*,int); -SQLITE_API const void *sqlite3_column_table_name16(sqlite3_stmt*,int); -SQLITE_API const char *sqlite3_column_origin_name(sqlite3_stmt*,int); -SQLITE_API const void *sqlite3_column_origin_name16(sqlite3_stmt*,int); - -/* -** CAPI3REF: Declared Datatype Of A Query Result {F13760} -** -** The first parameter is a [prepared statement]. -** If this statement is a SELECT statement and the Nth column of the -** returned result set of that SELECT is a table column (not an -** expression or subquery) then the declared type of the table -** column is returned. If the Nth column of the result set is an -** expression or subquery, then a NULL pointer is returned. -** The returned string is always UTF-8 encoded. {END} -** For example, in the database schema: -** -** CREATE TABLE t1(c1 VARIANT); -** -** And the following statement compiled: -** -** SELECT c1 + 1, c1 FROM t1; -** -** Then this routine would return the string "VARIANT" for the second -** result column (i==1), and a NULL pointer for the first result column -** (i==0). -** -** SQLite uses dynamic run-time typing. So just because a column -** is declared to contain a particular type does not mean that the -** data stored in that column is of the declared type. SQLite is -** strongly typed, but the typing is dynamic not static. Type -** is associated with individual values, not with the containers -** used to hold those values. -** -** INVARIANTS: -** -** {F13761} A successful call to [sqlite3_column_decltype(S,N)] -** returns a zero-terminated UTF-8 string containing the -** the declared datatype of the table column that appears -** as the Nth column (numbered from 0) of the result set to the -** [prepared statement] S. -** -** {F13762} A successful call to [sqlite3_column_decltype16(S,N)] -** returns a zero-terminated UTF-16 native byte order string -** containing the declared datatype of the table column that appears -** as the Nth column (numbered from 0) of the result set to the -** [prepared statement] S. -** -** {F13763} If N is less than 0 or N is greater than or equal to -** the number of columns in [prepared statement] S -** or if the Nth column of S is an expression or subquery rather -** than a table column or if a memory allocation failure -** occurs during encoding conversions, then -** calls to [sqlite3_column_decltype(S,N)] or -** [sqlite3_column_decltype16(S,N)] return NULL. -*/ -SQLITE_API const char *sqlite3_column_decltype(sqlite3_stmt*,int); -SQLITE_API const void *sqlite3_column_decltype16(sqlite3_stmt*,int); - -/* -** CAPI3REF: Evaluate An SQL Statement {F13200} -** -** After an [prepared statement] has been prepared with a call -** to either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()] or to one of -** the legacy interfaces [sqlite3_prepare()] or [sqlite3_prepare16()], -** then this function must be called one or more times to evaluate the -** statement. -** -** The details of the behavior of this sqlite3_step() interface depend -** on whether the statement was prepared using the newer "v2" interface -** [sqlite3_prepare_v2()] and [sqlite3_prepare16_v2()] or the older legacy -** interface [sqlite3_prepare()] and [sqlite3_prepare16()]. The use of the -** new "v2" interface is recommended for new applications but the legacy -** interface will continue to be supported. -** -** In the legacy interface, the return value will be either [SQLITE_BUSY], -** [SQLITE_DONE], [SQLITE_ROW], [SQLITE_ERROR], or [SQLITE_MISUSE]. -** With the "v2" interface, any of the other [SQLITE_OK | result code] -** or [SQLITE_IOERR_READ | extended result code] might be returned as -** well. -** -** [SQLITE_BUSY] means that the database engine was unable to acquire the -** database locks it needs to do its job. If the statement is a COMMIT -** or occurs outside of an explicit transaction, then you can retry the -** statement. If the statement is not a COMMIT and occurs within a -** explicit transaction then you should rollback the transaction before -** continuing. -** -** [SQLITE_DONE] means that the statement has finished executing -** successfully. sqlite3_step() should not be called again on this virtual -** machine without first calling [sqlite3_reset()] to reset the virtual -** machine back to its initial state. -** -** If the SQL statement being executed returns any data, then -** [SQLITE_ROW] is returned each time a new row of data is ready -** for processing by the caller. The values may be accessed using -** the [sqlite3_column_int | column access functions]. -** sqlite3_step() is called again to retrieve the next row of data. -** -** [SQLITE_ERROR] means that a run-time error (such as a constraint -** violation) has occurred. sqlite3_step() should not be called again on -** the VM. More information may be found by calling [sqlite3_errmsg()]. -** With the legacy interface, a more specific error code (example: -** [SQLITE_INTERRUPT], [SQLITE_SCHEMA], [SQLITE_CORRUPT], and so forth) -** can be obtained by calling [sqlite3_reset()] on the -** [prepared statement]. In the "v2" interface, -** the more specific error code is returned directly by sqlite3_step(). -** -** [SQLITE_MISUSE] means that the this routine was called inappropriately. -** Perhaps it was called on a [prepared statement] that has -** already been [sqlite3_finalize | finalized] or on one that had -** previously returned [SQLITE_ERROR] or [SQLITE_DONE]. Or it could -** be the case that the same database connection is being used by two or -** more threads at the same moment in time. -** -** Goofy Interface Alert: -** In the legacy interface, -** the sqlite3_step() API always returns a generic error code, -** [SQLITE_ERROR], following any error other than [SQLITE_BUSY] -** and [SQLITE_MISUSE]. You must call [sqlite3_reset()] or -** [sqlite3_finalize()] in order to find one of the specific -** [error codes] that better describes the error. -** We admit that this is a goofy design. The problem has been fixed -** with the "v2" interface. If you prepare all of your SQL statements -** using either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()] instead -** of the legacy [sqlite3_prepare()] and [sqlite3_prepare16()], then the -** more specific [error codes] are returned directly -** by sqlite3_step(). The use of the "v2" interface is recommended. -** -** INVARIANTS: -** -** {F13202} If [prepared statement] S is ready to be -** run, then [sqlite3_step(S)] advances that prepared statement -** until to completion or until it is ready to return another -** row of the result set or an interrupt or run-time error occurs. -** -** {F15304} When a call to [sqlite3_step(S)] causes the -** [prepared statement] S to run to completion, -** the function returns [SQLITE_DONE]. -** -** {F15306} When a call to [sqlite3_step(S)] stops because it is ready -** to return another row of the result set, it returns -** [SQLITE_ROW]. -** -** {F15308} If a call to [sqlite3_step(S)] encounters an -** [sqlite3_interrupt|interrupt] or a run-time error, -** it returns an appropraite error code that is not one of -** [SQLITE_OK], [SQLITE_ROW], or [SQLITE_DONE]. -** -** {F15310} If an [sqlite3_interrupt|interrupt] or run-time error -** occurs during a call to [sqlite3_step(S)] -** for a [prepared statement] S created using -** legacy interfaces [sqlite3_prepare()] or -** [sqlite3_prepare16()] then the function returns either -** [SQLITE_ERROR], [SQLITE_BUSY], or [SQLITE_MISUSE]. -*/ -SQLITE_API int sqlite3_step(sqlite3_stmt*); - -/* -** CAPI3REF: Number of columns in a result set {F13770} -** -** Return the number of values in the current row of the result set. -** -** INVARIANTS: -** -** {F13771} After a call to [sqlite3_step(S)] that returns -** [SQLITE_ROW], the [sqlite3_data_count(S)] routine -** will return the same value as the -** [sqlite3_column_count(S)] function. -** -** {F13772} After [sqlite3_step(S)] has returned any value other than -** [SQLITE_ROW] or before [sqlite3_step(S)] has been -** called on the [prepared statement] for -** the first time since it was [sqlite3_prepare|prepared] -** or [sqlite3_reset|reset], the [sqlite3_data_count(S)] -** routine returns zero. -*/ -SQLITE_API int sqlite3_data_count(sqlite3_stmt *pStmt); - -/* -** CAPI3REF: Fundamental Datatypes {F10265} -** KEYWORDS: SQLITE_TEXT -** -** {F10266}Every value in SQLite has one of five fundamental datatypes: -** -**
    -**
  • 64-bit signed integer -**
  • 64-bit IEEE floating point number -**
  • string -**
  • BLOB -**
  • NULL -**
{END} -** -** These constants are codes for each of those types. -** -** Note that the SQLITE_TEXT constant was also used in SQLite version 2 -** for a completely different meaning. Software that links against both -** SQLite version 2 and SQLite version 3 should use SQLITE3_TEXT not -** SQLITE_TEXT. -*/ -#define SQLITE_INTEGER 1 -#define SQLITE_FLOAT 2 -#define SQLITE_BLOB 4 -#define SQLITE_NULL 5 -#ifdef SQLITE_TEXT -# undef SQLITE_TEXT -#else -# define SQLITE_TEXT 3 -#endif -#define SQLITE3_TEXT 3 - -/* -** CAPI3REF: Results Values From A Query {F13800} -** -** These routines form the "result set query" interface. -** -** These routines return information about -** a single column of the current result row of a query. In every -** case the first argument is a pointer to the -** [prepared statement] that is being -** evaluated (the [sqlite3_stmt*] that was returned from -** [sqlite3_prepare_v2()] or one of its variants) and -** the second argument is the index of the column for which information -** should be returned. The left-most column of the result set -** has an index of 0. -** -** If the SQL statement is not currently point to a valid row, or if the -** the column index is out of range, the result is undefined. -** These routines may only be called when the most recent call to -** [sqlite3_step()] has returned [SQLITE_ROW] and neither -** [sqlite3_reset()] nor [sqlite3_finalize()] has been call subsequently. -** If any of these routines are called after [sqlite3_reset()] or -** [sqlite3_finalize()] or after [sqlite3_step()] has returned -** something other than [SQLITE_ROW], the results are undefined. -** If [sqlite3_step()] or [sqlite3_reset()] or [sqlite3_finalize()] -** are called from a different thread while any of these routines -** are pending, then the results are undefined. -** -** The sqlite3_column_type() routine returns -** [SQLITE_INTEGER | datatype code] for the initial data type -** of the result column. The returned value is one of [SQLITE_INTEGER], -** [SQLITE_FLOAT], [SQLITE_TEXT], [SQLITE_BLOB], or [SQLITE_NULL]. The value -** returned by sqlite3_column_type() is only meaningful if no type -** conversions have occurred as described below. After a type conversion, -** the value returned by sqlite3_column_type() is undefined. Future -** versions of SQLite may change the behavior of sqlite3_column_type() -** following a type conversion. -** -** If the result is a BLOB or UTF-8 string then the sqlite3_column_bytes() -** routine returns the number of bytes in that BLOB or string. -** If the result is a UTF-16 string, then sqlite3_column_bytes() converts -** the string to UTF-8 and then returns the number of bytes. -** If the result is a numeric value then sqlite3_column_bytes() uses -** [sqlite3_snprintf()] to convert that value to a UTF-8 string and returns -** the number of bytes in that string. -** The value returned does not include the zero terminator at the end -** of the string. For clarity: the value returned is the number of -** bytes in the string, not the number of characters. -** -** Strings returned by sqlite3_column_text() and sqlite3_column_text16(), -** even empty strings, are always zero terminated. The return -** value from sqlite3_column_blob() for a zero-length blob is an arbitrary -** pointer, possibly even a NULL pointer. -** -** The sqlite3_column_bytes16() routine is similar to sqlite3_column_bytes() -** but leaves the result in UTF-16 in native byte order instead of UTF-8. -** The zero terminator is not included in this count. -** -** The object returned by [sqlite3_column_value()] is an -** [unprotected sqlite3_value] object. An unprotected sqlite3_value object -** may only be used with [sqlite3_bind_value()] and [sqlite3_result_value()]. -** If the [unprotected sqlite3_value] object returned by -** [sqlite3_column_value()] is used in any other way, including calls -** to routines like -** [sqlite3_value_int()], [sqlite3_value_text()], or [sqlite3_value_bytes()], -** then the behavior is undefined. -** -** These routines attempt to convert the value where appropriate. For -** example, if the internal representation is FLOAT and a text result -** is requested, [sqlite3_snprintf()] is used internally to do the conversion -** automatically. The following table details the conversions that -** are applied: -** -**
-** -**
Internal
Type 		Requested
Type 		Conversion -** -**
NULL INTEGER Result is 0 -**
NULL FLOAT Result is 0.0 -**
NULL TEXT Result is NULL pointer -**
NULL BLOB Result is NULL pointer -**
INTEGER FLOAT Convert from integer to float -**
INTEGER TEXT ASCII rendering of the integer -**
INTEGER BLOB Same as for INTEGER->TEXT -**
FLOAT INTEGER Convert from float to integer -**
FLOAT TEXT ASCII rendering of the float -**
FLOAT BLOB Same as FLOAT->TEXT -**
TEXT INTEGER Use atoi() -**
TEXT FLOAT Use atof() -**
TEXT BLOB No change -**
BLOB INTEGER Convert to TEXT then use atoi() -**
BLOB FLOAT Convert to TEXT then use atof() -**
BLOB TEXT Add a zero terminator if needed -**
-**
-** -** The table above makes reference to standard C library functions atoi() -** and atof(). SQLite does not really use these functions. It has its -** on equavalent internal routines. The atoi() and atof() names are -** used in the table for brevity and because they are familiar to most -** C programmers. -** -** Note that when type conversions occur, pointers returned by prior -** calls to sqlite3_column_blob(), sqlite3_column_text(), and/or -** sqlite3_column_text16() may be invalidated. -** Type conversions and pointer invalidations might occur -** in the following cases: -** -**
    -**

  • The initial content is a BLOB and sqlite3_column_text() -** or sqlite3_column_text16() is called. A zero-terminator might -** need to be added to the string.

    • -** -**

  • The initial content is UTF-8 text and sqlite3_column_bytes16() or -** sqlite3_column_text16() is called. The content must be converted -** to UTF-16.

    • -** -**

  • The initial content is UTF-16 text and sqlite3_column_bytes() or -** sqlite3_column_text() is called. The content must be converted -** to UTF-8.

    • -**
-** -** Conversions between UTF-16be and UTF-16le are always done in place and do -** not invalidate a prior pointer, though of course the content of the buffer -** that the prior pointer points to will have been modified. Other kinds -** of conversion are done in place when it is possible, but sometime it is -** not possible and in those cases prior pointers are invalidated. -** -** The safest and easiest to remember policy is to invoke these routines -** in one of the following ways: -** -**
    -**
  • sqlite3_column_text() followed by sqlite3_column_bytes()
    • -**
  • sqlite3_column_blob() followed by sqlite3_column_bytes()
    • -**
  • sqlite3_column_text16() followed by sqlite3_column_bytes16()
    • -**
-** -** In other words, you should call sqlite3_column_text(), sqlite3_column_blob(), -** or sqlite3_column_text16() first to force the result into the desired -** format, then invoke sqlite3_column_bytes() or sqlite3_column_bytes16() to -** find the size of the result. Do not mix call to sqlite3_column_text() or -** sqlite3_column_blob() with calls to sqlite3_column_bytes16(). And do not -** mix calls to sqlite3_column_text16() with calls to sqlite3_column_bytes(). -** -** The pointers returned are valid until a type conversion occurs as -** described above, or until [sqlite3_step()] or [sqlite3_reset()] or -** [sqlite3_finalize()] is called. The memory space used to hold strings -** and blobs is freed automatically. Do not pass the pointers returned -** [sqlite3_column_blob()], [sqlite3_column_text()], etc. into -** [sqlite3_free()]. -** -** If a memory allocation error occurs during the evaluation of any -** of these routines, a default value is returned. The default value -** is either the integer 0, the floating point number 0.0, or a NULL -** pointer. Subsequent calls to [sqlite3_errcode()] will return -** [SQLITE_NOMEM]. -** -** INVARIANTS: -** -** {F13803} The [sqlite3_column_blob(S,N)] interface converts the -** Nth column in the current row of the result set for -** [prepared statement] S into a blob and then returns a -** pointer to the converted value. -** -** {F13806} The [sqlite3_column_bytes(S,N)] interface returns the -** number of bytes in the blob or string (exclusive of the -** zero terminator on the string) that was returned by the -** most recent call to [sqlite3_column_blob(S,N)] or -** [sqlite3_column_text(S,N)]. -** -** {F13809} The [sqlite3_column_bytes16(S,N)] interface returns the -** number of bytes in the string (exclusive of the -** zero terminator on the string) that was returned by the -** most recent call to [sqlite3_column_text16(S,N)]. -** -** {F13812} The [sqlite3_column_double(S,N)] interface converts the -** Nth column in the current row of the result set for -** [prepared statement] S into a floating point value and -** returns a copy of that value. -** -** {F13815} The [sqlite3_column_int(S,N)] interface converts the -** Nth column in the current row of the result set for -** [prepared statement] S into a 64-bit signed integer and -** returns the lower 32 bits of that integer. -** -** {F13818} The [sqlite3_column_int64(S,N)] interface converts the -** Nth column in the current row of the result set for -** [prepared statement] S into a 64-bit signed integer and -** returns a copy of that integer. -** -** {F13821} The [sqlite3_column_text(S,N)] interface converts the -** Nth column in the current row of the result set for -** [prepared statement] S into a zero-terminated UTF-8 -** string and returns a pointer to that string. -** -** {F13824} The [sqlite3_column_text16(S,N)] interface converts the -** Nth column in the current row of the result set for -** [prepared statement] S into a zero-terminated 2-byte -** aligned UTF-16 native byte order -** string and returns a pointer to that string. -** -** {F13827} The [sqlite3_column_type(S,N)] interface returns -** one of [SQLITE_NULL], [SQLITE_INTEGER], [SQLITE_FLOAT], -** [SQLITE_TEXT], or [SQLITE_BLOB] as appropriate for -** the Nth column in the current row of the result set for -** [prepared statement] S. -** -** {F13830} The [sqlite3_column_value(S,N)] interface returns a -** pointer to an [unprotected sqlite3_value] object for the -** Nth column in the current row of the result set for -** [prepared statement] S. -*/ -SQLITE_API const void *sqlite3_column_blob(sqlite3_stmt*, int iCol); -SQLITE_API int sqlite3_column_bytes(sqlite3_stmt*, int iCol); -SQLITE_API int sqlite3_column_bytes16(sqlite3_stmt*, int iCol); -SQLITE_API double sqlite3_column_double(sqlite3_stmt*, int iCol); -SQLITE_API int sqlite3_column_int(sqlite3_stmt*, int iCol); -SQLITE_API sqlite3_int64 sqlite3_column_int64(sqlite3_stmt*, int iCol); -SQLITE_API const unsigned char *sqlite3_column_text(sqlite3_stmt*, int iCol); -SQLITE_API const void *sqlite3_column_text16(sqlite3_stmt*, int iCol); -SQLITE_API int sqlite3_column_type(sqlite3_stmt*, int iCol); -SQLITE_API sqlite3_value *sqlite3_column_value(sqlite3_stmt*, int iCol); - -/* -** CAPI3REF: Destroy A Prepared Statement Object {F13300} -** -** The sqlite3_finalize() function is called to delete a -** [prepared statement]. If the statement was -** executed successfully, or not executed at all, then SQLITE_OK is returned. -** If execution of the statement failed then an -** [error code] or [extended error code] -** is returned. -** -** This routine can be called at any point during the execution of the -** [prepared statement]. If the virtual machine has not -** completed execution when this routine is called, that is like -** encountering an error or an interrupt. (See [sqlite3_interrupt()].) -** Incomplete updates may be rolled back and transactions cancelled, -** depending on the circumstances, and the -** [error code] returned will be [SQLITE_ABORT]. -** -** INVARIANTS: -** -** {F11302} The [sqlite3_finalize(S)] interface destroys the -** [prepared statement] S and releases all -** memory and file resources held by that object. -** -** {F11304} If the most recent call to [sqlite3_step(S)] for the -** [prepared statement] S returned an error, -** then [sqlite3_finalize(S)] returns that same error. -*/ -SQLITE_API int sqlite3_finalize(sqlite3_stmt *pStmt); - -/* -** CAPI3REF: Reset A Prepared Statement Object {F13330} -** -** The sqlite3_reset() function is called to reset a -** [prepared statement] object. -** back to its initial state, ready to be re-executed. -** Any SQL statement variables that had values bound to them using -** the [sqlite3_bind_blob | sqlite3_bind_*() API] retain their values. -** Use [sqlite3_clear_bindings()] to reset the bindings. -** -** {F11332} The [sqlite3_reset(S)] interface resets the [prepared statement] S -** back to the beginning of its program. -** -** {F11334} If the most recent call to [sqlite3_step(S)] for -** [prepared statement] S returned [SQLITE_ROW] or [SQLITE_DONE], -** or if [sqlite3_step(S)] has never before been called on S, -** then [sqlite3_reset(S)] returns [SQLITE_OK]. -** -** {F11336} If the most recent call to [sqlite3_step(S)] for -** [prepared statement] S indicated an error, then -** [sqlite3_reset(S)] returns an appropriate [error code]. -** -** {F11338} The [sqlite3_reset(S)] interface does not change the values -** of any [sqlite3_bind_blob|bindings] on [prepared statement] S. -*/ -SQLITE_API int sqlite3_reset(sqlite3_stmt *pStmt); - -/* -** CAPI3REF: Create Or Redefine SQL Functions {F16100} -** KEYWORDS: {function creation routines} -** -** These two functions (collectively known as -** "function creation routines") are used to add SQL functions or aggregates -** or to redefine the behavior of existing SQL functions or aggregates. The -** difference only between the two is that the second parameter, the -** name of the (scalar) function or aggregate, is encoded in UTF-8 for -** sqlite3_create_function() and UTF-16 for sqlite3_create_function16(). -** -** The first parameter is the [database connection] to which the SQL -** function is to be added. If a single -** program uses more than one [database connection] internally, then SQL -** functions must be added individually to each [database connection]. -** -** The second parameter is the name of the SQL function to be created -** or redefined. -** The length of the name is limited to 255 bytes, exclusive of the -** zero-terminator. Note that the name length limit is in bytes, not -** characters. Any attempt to create a function with a longer name -** will result in an SQLITE_ERROR error. -** -** The third parameter is the number of arguments that the SQL function or -** aggregate takes. If this parameter is negative, then the SQL function or -** aggregate may take any number of arguments. -** -** The fourth parameter, eTextRep, specifies what -** [SQLITE_UTF8 | text encoding] this SQL function prefers for -** its parameters. Any SQL function implementation should be able to work -** work with UTF-8, UTF-16le, or UTF-16be. But some implementations may be -** more efficient with one encoding than another. It is allowed to -** invoke sqlite3_create_function() or sqlite3_create_function16() multiple -** times with the same function but with different values of eTextRep. -** When multiple implementations of the same function are available, SQLite -** will pick the one that involves the least amount of data conversion. -** If there is only a single implementation which does not care what -** text encoding is used, then the fourth argument should be -** [SQLITE_ANY]. -** -** The fifth parameter is an arbitrary pointer. The implementation -** of the function can gain access to this pointer using -** [sqlite3_user_data()]. -** -** The seventh, eighth and ninth parameters, xFunc, xStep and xFinal, are -** pointers to C-language functions that implement the SQL -** function or aggregate. A scalar SQL function requires an implementation of -** the xFunc callback only, NULL pointers should be passed as the xStep -** and xFinal parameters. An aggregate SQL function requires an implementation -** of xStep and xFinal and NULL should be passed for xFunc. To delete an -** existing SQL function or aggregate, pass NULL for all three function -** callback. -** -** It is permitted to register multiple implementations of the same -** functions with the same name but with either differing numbers of -** arguments or differing perferred text encodings. SQLite will use -** the implementation most closely matches the way in which the -** SQL function is used. -** -** INVARIANTS: -** -** {F16103} The [sqlite3_create_function16()] interface behaves exactly -** like [sqlite3_create_function()] in every way except that it -** interprets the zFunctionName argument as -** zero-terminated UTF-16 native byte order instead of as a -** zero-terminated UTF-8. -** -** {F16106} A successful invocation of -** the [sqlite3_create_function(D,X,N,E,...)] interface registers -** or replaces callback functions in [database connection] D -** used to implement the SQL function named X with N parameters -** and having a perferred text encoding of E. -** -** {F16109} A successful call to [sqlite3_create_function(D,X,N,E,P,F,S,L)] -** replaces the P, F, S, and L values from any prior calls with -** the same D, X, N, and E values. -** -** {F16112} The [sqlite3_create_function(D,X,...)] interface fails with -** a return code of [SQLITE_ERROR] if the SQL function name X is -** longer than 255 bytes exclusive of the zero terminator. -** -** {F16118} Either F must be NULL and S and L are non-NULL or else F -** is non-NULL and S and L are NULL, otherwise -** [sqlite3_create_function(D,X,N,E,P,F,S,L)] returns [SQLITE_ERROR]. -** -** {F16121} The [sqlite3_create_function(D,...)] interface fails with an -** error code of [SQLITE_BUSY] if there exist [prepared statements] -** associated with the [database connection] D. -** -** {F16124} The [sqlite3_create_function(D,X,N,...)] interface fails with an -** error code of [SQLITE_ERROR] if parameter N (specifying the number -** of arguments to the SQL function being registered) is less -** than -1 or greater than 127. -** -** {F16127} When N is non-negative, the [sqlite3_create_function(D,X,N,...)] -** interface causes callbacks to be invoked for the SQL function -** named X when the number of arguments to the SQL function is -** exactly N. -** -** {F16130} When N is -1, the [sqlite3_create_function(D,X,N,...)] -** interface causes callbacks to be invoked for the SQL function -** named X with any number of arguments. -** -** {F16133} When calls to [sqlite3_create_function(D,X,N,...)] -** specify multiple implementations of the same function X -** and when one implementation has N>=0 and the other has N=(-1) -** the implementation with a non-zero N is preferred. -** -** {F16136} When calls to [sqlite3_create_function(D,X,N,E,...)] -** specify multiple implementations of the same function X with -** the same number of arguments N but with different -** encodings E, then the implementation where E matches the -** database encoding is preferred. -** -** {F16139} For an aggregate SQL function created using -** [sqlite3_create_function(D,X,N,E,P,0,S,L)] the finializer -** function L will always be invoked exactly once if the -** step function S is called one or more times. -** -** {F16142} When SQLite invokes either the xFunc or xStep function of -** an application-defined SQL function or aggregate created -** by [sqlite3_create_function()] or [sqlite3_create_function16()], -** then the array of [sqlite3_value] objects passed as the -** third parameter are always [protected sqlite3_value] objects. -*/ -SQLITE_API int sqlite3_create_function( - sqlite3 *db, - const char *zFunctionName, - int nArg, - int eTextRep, - void *pApp, - void (*xFunc)(sqlite3_context*,int,sqlite3_value**), - void (*xStep)(sqlite3_context*,int,sqlite3_value**), - void (*xFinal)(sqlite3_context*) -); -SQLITE_API int sqlite3_create_function16( - sqlite3 *db, - const void *zFunctionName, - int nArg, - int eTextRep, - void *pApp, - void (*xFunc)(sqlite3_context*,int,sqlite3_value**), - void (*xStep)(sqlite3_context*,int,sqlite3_value**), - void (*xFinal)(sqlite3_context*) -); - -/* -** CAPI3REF: Text Encodings {F10267} -** -** These constant define integer codes that represent the various -** text encodings supported by SQLite. -*/ -#define SQLITE_UTF8 1 -#define SQLITE_UTF16LE 2 -#define SQLITE_UTF16BE 3 -#define SQLITE_UTF16 4 /* Use native byte order */ -#define SQLITE_ANY 5 /* sqlite3_create_function only */ -#define SQLITE_UTF16_ALIGNED 8 /* sqlite3_create_collation only */ - -/* -** CAPI3REF: Obsolete Functions -** -** These functions are all now obsolete. In order to maintain -** backwards compatibility with older code, we continue to support -** these functions. However, new development projects should avoid -** the use of these functions. To help encourage people to avoid -** using these functions, we are not going to tell you want they do. -*/ -SQLITE_API int sqlite3_aggregate_count(sqlite3_context*); -SQLITE_API int sqlite3_expired(sqlite3_stmt*); -SQLITE_API int sqlite3_transfer_bindings(sqlite3_stmt*, sqlite3_stmt*); -SQLITE_API int sqlite3_global_recover(void); -SQLITE_API void sqlite3_thread_cleanup(void); -SQLITE_API int sqlite3_memory_alarm(void(*)(void*,sqlite3_int64,int),void*,sqlite3_int64); - -/* -** CAPI3REF: Obtaining SQL Function Parameter Values {F15100} -** -** The C-language implementation of SQL functions and aggregates uses -** this set of interface routines to access the parameter values on -** the function or aggregate. -** -** The xFunc (for scalar functions) or xStep (for aggregates) parameters -** to [sqlite3_create_function()] and [sqlite3_create_function16()] -** define callbacks that implement the SQL functions and aggregates. -** The 4th parameter to these callbacks is an array of pointers to -** [protected sqlite3_value] objects. There is one [sqlite3_value] object for -** each parameter to the SQL function. These routines are used to -** extract values from the [sqlite3_value] objects. -** -** These routines work only with [protected sqlite3_value] objects. -** Any attempt to use these routines on an [unprotected sqlite3_value] -** object results in undefined behavior. -** -** These routines work just like the corresponding -** [sqlite3_column_blob | sqlite3_column_* routines] except that -** these routines take a single [protected sqlite3_value] object pointer -** instead of an [sqlite3_stmt*] pointer and an integer column number. -** -** The sqlite3_value_text16() interface extracts a UTF16 string -** in the native byte-order of the host machine. The -** sqlite3_value_text16be() and sqlite3_value_text16le() interfaces -** extract UTF16 strings as big-endian and little-endian respectively. -** -** The sqlite3_value_numeric_type() interface attempts to apply -** numeric affinity to the value. This means that an attempt is -** made to convert the value to an integer or floating point. If -** such a conversion is possible without loss of information (in other -** words if the value is a string that looks like a number) -** then the conversion is done. Otherwise no conversion occurs. The -** [SQLITE_INTEGER | datatype] after conversion is returned. -** -** Please pay particular attention to the fact that the pointer that -** is returned from [sqlite3_value_blob()], [sqlite3_value_text()], or -** [sqlite3_value_text16()] can be invalidated by a subsequent call to -** [sqlite3_value_bytes()], [sqlite3_value_bytes16()], [sqlite3_value_text()], -** or [sqlite3_value_text16()]. -** -** These routines must be called from the same thread as -** the SQL function that supplied the [sqlite3_value*] parameters. -** -** -** INVARIANTS: -** -** {F15103} The [sqlite3_value_blob(V)] interface converts the -** [protected sqlite3_value] object V into a blob and then returns a -** pointer to the converted value. -** -** {F15106} The [sqlite3_value_bytes(V)] interface returns the -** number of bytes in the blob or string (exclusive of the -** zero terminator on the string) that was returned by the -** most recent call to [sqlite3_value_blob(V)] or -** [sqlite3_value_text(V)]. -** -** {F15109} The [sqlite3_value_bytes16(V)] interface returns the -** number of bytes in the string (exclusive of the -** zero terminator on the string) that was returned by the -** most recent call to [sqlite3_value_text16(V)], -** [sqlite3_value_text16be(V)], or [sqlite3_value_text16le(V)]. -** -** {F15112} The [sqlite3_value_double(V)] interface converts the -** [protected sqlite3_value] object V into a floating point value and -** returns a copy of that value. -** -** {F15115} The [sqlite3_value_int(V)] interface converts the -** [protected sqlite3_value] object V into a 64-bit signed integer and -** returns the lower 32 bits of that integer. -** -** {F15118} The [sqlite3_value_int64(V)] interface converts the -** [protected sqlite3_value] object V into a 64-bit signed integer and -** returns a copy of that integer. -** -** {F15121} The [sqlite3_value_text(V)] interface converts the -** [protected sqlite3_value] object V into a zero-terminated UTF-8 -** string and returns a pointer to that string. -** -** {F15124} The [sqlite3_value_text16(V)] interface converts the -** [protected sqlite3_value] object V into a zero-terminated 2-byte -** aligned UTF-16 native byte order -** string and returns a pointer to that string. -** -** {F15127} The [sqlite3_value_text16be(V)] interface converts the -** [protected sqlite3_value] object V into a zero-terminated 2-byte -** aligned UTF-16 big-endian -** string and returns a pointer to that string. -** -** {F15130} The [sqlite3_value_text16le(V)] interface converts the -** [protected sqlite3_value] object V into a zero-terminated 2-byte -** aligned UTF-16 little-endian -** string and returns a pointer to that string. -** -** {F15133} The [sqlite3_value_type(V)] interface returns -** one of [SQLITE_NULL], [SQLITE_INTEGER], [SQLITE_FLOAT], -** [SQLITE_TEXT], or [SQLITE_BLOB] as appropriate for -** the [sqlite3_value] object V. -** -** {F15136} The [sqlite3_value_numeric_type(V)] interface converts -** the [protected sqlite3_value] object V into either an integer or -** a floating point value if it can do so without loss of -** information, and returns one of [SQLITE_NULL], -** [SQLITE_INTEGER], [SQLITE_FLOAT], [SQLITE_TEXT], or -** [SQLITE_BLOB] as appropriate for -** the [protected sqlite3_value] object V after the conversion attempt. -*/ -SQLITE_API const void *sqlite3_value_blob(sqlite3_value*); -SQLITE_API int sqlite3_value_bytes(sqlite3_value*); -SQLITE_API int sqlite3_value_bytes16(sqlite3_value*); -SQLITE_API double sqlite3_value_double(sqlite3_value*); -SQLITE_API int sqlite3_value_int(sqlite3_value*); -SQLITE_API sqlite3_int64 sqlite3_value_int64(sqlite3_value*); -SQLITE_API const unsigned char *sqlite3_value_text(sqlite3_value*); -SQLITE_API const void *sqlite3_value_text16(sqlite3_value*); -SQLITE_API const void *sqlite3_value_text16le(sqlite3_value*); -SQLITE_API const void *sqlite3_value_text16be(sqlite3_value*); -SQLITE_API int sqlite3_value_type(sqlite3_value*); -SQLITE_API int sqlite3_value_numeric_type(sqlite3_value*); - -/* -** CAPI3REF: Obtain Aggregate Function Context {F16210} -** -** The implementation of aggregate SQL functions use this routine to allocate -** a structure for storing their state. -** The first time the sqlite3_aggregate_context() routine is -** is called for a particular aggregate, SQLite allocates nBytes of memory -** zeros that memory, and returns a pointer to it. -** On second and subsequent calls to sqlite3_aggregate_context() -** for the same aggregate function index, the same buffer is returned. -** The implementation -** of the aggregate can use the returned buffer to accumulate data. -** -** SQLite automatically frees the allocated buffer when the aggregate -** query concludes. -** -** The first parameter should be a copy of the -** [sqlite3_context | SQL function context] that is the first -** parameter to the callback routine that implements the aggregate -** function. -** -** This routine must be called from the same thread in which -** the aggregate SQL function is running. -** -** INVARIANTS: -** -** {F16211} The first invocation of [sqlite3_aggregate_context(C,N)] for -** a particular instance of an aggregate function (for a particular -** context C) causes SQLite to allocation N bytes of memory, -** zero that memory, and return a pointer to the allocationed -** memory. -** -** {F16213} If a memory allocation error occurs during -** [sqlite3_aggregate_context(C,N)] then the function returns 0. -** -** {F16215} Second and subsequent invocations of -** [sqlite3_aggregate_context(C,N)] for the same context pointer C -** ignore the N parameter and return a pointer to the same -** block of memory returned by the first invocation. -** -** {F16217} The memory allocated by [sqlite3_aggregate_context(C,N)] is -** automatically freed on the next call to [sqlite3_reset()] -** or [sqlite3_finalize()] for the [prepared statement] containing -** the aggregate function associated with context C. -*/ -SQLITE_API void *sqlite3_aggregate_context(sqlite3_context*, int nBytes); - -/* -** CAPI3REF: User Data For Functions {F16240} -** -** The sqlite3_user_data() interface returns a copy of -** the pointer that was the pUserData parameter (the 5th parameter) -** of the the [sqlite3_create_function()] -** and [sqlite3_create_function16()] routines that originally -** registered the application defined function. {END} -** -** This routine must be called from the same thread in which -** the application-defined function is running. -** -** INVARIANTS: -** -** {F16243} The [sqlite3_user_data(C)] interface returns a copy of the -** P pointer from the [sqlite3_create_function(D,X,N,E,P,F,S,L)] -** or [sqlite3_create_function16(D,X,N,E,P,F,S,L)] call that -** registered the SQL function associated with -** [sqlite3_context] C. -*/ -SQLITE_API void *sqlite3_user_data(sqlite3_context*); - -/* -** CAPI3REF: Database Connection For Functions {F16250} -** -** The sqlite3_context_db_handle() interface returns a copy of -** the pointer to the [database connection] (the 1st parameter) -** of the the [sqlite3_create_function()] -** and [sqlite3_create_function16()] routines that originally -** registered the application defined function. -** -** INVARIANTS: -** -** {F16253} The [sqlite3_context_db_handle(C)] interface returns a copy of the -** D pointer from the [sqlite3_create_function(D,X,N,E,P,F,S,L)] -** or [sqlite3_create_function16(D,X,N,E,P,F,S,L)] call that -** registered the SQL function associated with -** [sqlite3_context] C. -*/ -SQLITE_API sqlite3 *sqlite3_context_db_handle(sqlite3_context*); - -/* -** CAPI3REF: Function Auxiliary Data {F16270} -** -** The following two functions may be used by scalar SQL functions to -** associate meta-data with argument values. If the same value is passed to -** multiple invocations of the same SQL function during query execution, under -** some circumstances the associated meta-data may be preserved. This may -** be used, for example, to add a regular-expression matching scalar -** function. The compiled version of the regular expression is stored as -** meta-data associated with the SQL value passed as the regular expression -** pattern. The compiled regular expression can be reused on multiple -** invocations of the same function so that the original pattern string -** does not need to be recompiled on each invocation. -** -** The sqlite3_get_auxdata() interface returns a pointer to the meta-data -** associated by the sqlite3_set_auxdata() function with the Nth argument -** value to the application-defined function. -** If no meta-data has been ever been set for the Nth -** argument of the function, or if the cooresponding function parameter -** has changed since the meta-data was set, then sqlite3_get_auxdata() -** returns a NULL pointer. -** -** The sqlite3_set_auxdata() interface saves the meta-data -** pointed to by its 3rd parameter as the meta-data for the N-th -** argument of the application-defined function. Subsequent -** calls to sqlite3_get_auxdata() might return this data, if it has -** not been destroyed. -** If it is not NULL, SQLite will invoke the destructor -** function given by the 4th parameter to sqlite3_set_auxdata() on -** the meta-data when the corresponding function parameter changes -** or when the SQL statement completes, whichever comes first. -** -** SQLite is free to call the destructor and drop meta-data on -** any parameter of any function at any time. The only guarantee -** is that the destructor will be called before the metadata is -** dropped. -** -** In practice, meta-data is preserved between function calls for -** expressions that are constant at compile time. This includes literal -** values and SQL variables. -** -** These routines must be called from the same thread in which -** the SQL function is running. -** -** INVARIANTS: -** -** {F16272} The [sqlite3_get_auxdata(C,N)] interface returns a pointer -** to metadata associated with the Nth parameter of the SQL function -** whose context is C, or NULL if there is no metadata associated -** with that parameter. -** -** {F16274} The [sqlite3_set_auxdata(C,N,P,D)] interface assigns a metadata -** pointer P to the Nth parameter of the SQL function with context -** C. -** -** {F16276} SQLite will invoke the destructor D with a single argument -** which is the metadata pointer P following a call to -** [sqlite3_set_auxdata(C,N,P,D)] when SQLite ceases to hold -** the metadata. -** -** {F16277} SQLite ceases to hold metadata for an SQL function parameter -** when the value of that parameter changes. -** -** {F16278} When [sqlite3_set_auxdata(C,N,P,D)] is invoked, the destructor -** is called for any prior metadata associated with the same function -** context C and parameter N. -** -** {F16279} SQLite will call destructors for any metadata it is holding -** in a particular [prepared statement] S when either -** [sqlite3_reset(S)] or [sqlite3_finalize(S)] is called. -*/ -SQLITE_API void *sqlite3_get_auxdata(sqlite3_context*, int N); -SQLITE_API void sqlite3_set_auxdata(sqlite3_context*, int N, void*, void (*)(void*)); - - -/* -** CAPI3REF: Constants Defining Special Destructor Behavior {F10280} -** -** These are special value for the destructor that is passed in as the -** final argument to routines like [sqlite3_result_blob()]. If the destructor -** argument is SQLITE_STATIC, it means that the content pointer is constant -** and will never change. It does not need to be destroyed. The -** SQLITE_TRANSIENT value means that the content will likely change in -** the near future and that SQLite should make its own private copy of -** the content before returning. -** -** The typedef is necessary to work around problems in certain -** C++ compilers. See ticket #2191. -*/ -typedef void (*sqlite3_destructor_type)(void*); -#define SQLITE_STATIC ((sqlite3_destructor_type)0) -#define SQLITE_TRANSIENT ((sqlite3_destructor_type)-1) - -/* -** CAPI3REF: Setting The Result Of An SQL Function {F16400} -** -** These routines are used by the xFunc or xFinal callbacks that -** implement SQL functions and aggregates. See -** [sqlite3_create_function()] and [sqlite3_create_function16()] -** for additional information. -** -** These functions work very much like the -** [sqlite3_bind_blob | sqlite3_bind_*] family of functions used -** to bind values to host parameters in prepared statements. -** Refer to the -** [sqlite3_bind_blob | sqlite3_bind_* documentation] for -** additional information. -** -** The sqlite3_result_blob() interface sets the result from -** an application defined function to be the BLOB whose content is pointed -** to by the second parameter and which is N bytes long where N is the -** third parameter. -** The sqlite3_result_zeroblob() inerfaces set the result of -** the application defined function to be a BLOB containing all zero -** bytes and N bytes in size, where N is the value of the 2nd parameter. -** -** The sqlite3_result_double() interface sets the result from -** an application defined function to be a floating point value specified -** by its 2nd argument. -** -** The sqlite3_result_error() and sqlite3_result_error16() functions -** cause the implemented SQL function to throw an exception. -** SQLite uses the string pointed to by the -** 2nd parameter of sqlite3_result_error() or sqlite3_result_error16() -** as the text of an error message. SQLite interprets the error -** message string from sqlite3_result_error() as UTF8. SQLite -** interprets the string from sqlite3_result_error16() as UTF16 in native -** byte order. If the third parameter to sqlite3_result_error() -** or sqlite3_result_error16() is negative then SQLite takes as the error -** message all text up through the first zero character. -** If the third parameter to sqlite3_result_error() or -** sqlite3_result_error16() is non-negative then SQLite takes that many -** bytes (not characters) from the 2nd parameter as the error message. -** The sqlite3_result_error() and sqlite3_result_error16() -** routines make a copy private copy of the error message text before -** they return. Hence, the calling function can deallocate or -** modify the text after they return without harm. -** The sqlite3_result_error_code() function changes the error code -** returned by SQLite as a result of an error in a function. By default, -** the error code is SQLITE_ERROR. A subsequent call to sqlite3_result_error() -** or sqlite3_result_error16() resets the error code to SQLITE_ERROR. -** -** The sqlite3_result_toobig() interface causes SQLite -** to throw an error indicating that a string or BLOB is to long -** to represent. The sqlite3_result_nomem() interface -** causes SQLite to throw an exception indicating that the a -** memory allocation failed. -** -** The sqlite3_result_int() interface sets the return value -** of the application-defined function to be the 32-bit signed integer -** value given in the 2nd argument. -** The sqlite3_result_int64() interface sets the return value -** of the application-defined function to be the 64-bit signed integer -** value given in the 2nd argument. -** -** The sqlite3_result_null() interface sets the return value -** of the application-defined function to be NULL. -** -** The sqlite3_result_text(), sqlite3_result_text16(), -** sqlite3_result_text16le(), and sqlite3_result_text16be() interfaces -** set the return value of the application-defined function to be -** a text string which is represented as UTF-8, UTF-16 native byte order, -** UTF-16 little endian, or UTF-16 big endian, respectively. -** SQLite takes the text result from the application from -** the 2nd parameter of the sqlite3_result_text* interfaces. -** If the 3rd parameter to the sqlite3_result_text* interfaces -** is negative, then SQLite takes result text from the 2nd parameter -** through the first zero character. -** If the 3rd parameter to the sqlite3_result_text* interfaces -** is non-negative, then as many bytes (not characters) of the text -** pointed to by the 2nd parameter are taken as the application-defined -** function result. -** If the 4th parameter to the sqlite3_result_text* interfaces -** or sqlite3_result_blob is a non-NULL pointer, then SQLite calls that -** function as the destructor on the text or blob result when it has -** finished using that result. -** If the 4th parameter to the sqlite3_result_text* interfaces -** or sqlite3_result_blob is the special constant SQLITE_STATIC, then -** SQLite assumes that the text or blob result is constant space and -** does not copy the space or call a destructor when it has -** finished using that result. -** If the 4th parameter to the sqlite3_result_text* interfaces -** or sqlite3_result_blob is the special constant SQLITE_TRANSIENT -** then SQLite makes a copy of the result into space obtained from -** from [sqlite3_malloc()] before it returns. -** -** The sqlite3_result_value() interface sets the result of -** the application-defined function to be a copy the -** [unprotected sqlite3_value] object specified by the 2nd parameter. The -** sqlite3_result_value() interface makes a copy of the [sqlite3_value] -** so that [sqlite3_value] specified in the parameter may change or -** be deallocated after sqlite3_result_value() returns without harm. -** A [protected sqlite3_value] object may always be used where an -** [unprotected sqlite3_value] object is required, so either -** kind of [sqlite3_value] object can be used with this interface. -** -** If these routines are called from within the different thread -** than the one containing the application-defined function that recieved -** the [sqlite3_context] pointer, the results are undefined. -** -** INVARIANTS: -** -** {F16403} The default return value from any SQL function is NULL. -** -** {F16406} The [sqlite3_result_blob(C,V,N,D)] interface changes the -** return value of function C to be a blob that is N bytes -** in length and with content pointed to by V. -** -** {F16409} The [sqlite3_result_double(C,V)] interface changes the -** return value of function C to be the floating point value V. -** -** {F16412} The [sqlite3_result_error(C,V,N)] interface changes the return -** value of function C to be an exception with error code -** [SQLITE_ERROR] and a UTF8 error message copied from V up to the -** first zero byte or until N bytes are read if N is positive. -** -** {F16415} The [sqlite3_result_error16(C,V,N)] interface changes the return -** value of function C to be an exception with error code -** [SQLITE_ERROR] and a UTF16 native byte order error message -** copied from V up to the first zero terminator or until N bytes -** are read if N is positive. -** -** {F16418} The [sqlite3_result_error_toobig(C)] interface changes the return -** value of the function C to be an exception with error code -** [SQLITE_TOOBIG] and an appropriate error message. -** -** {F16421} The [sqlite3_result_error_nomem(C)] interface changes the return -** value of the function C to be an exception with error code -** [SQLITE_NOMEM] and an appropriate error message. -** -** {F16424} The [sqlite3_result_error_code(C,E)] interface changes the return -** value of the function C to be an exception with error code E. -** The error message text is unchanged. -** -** {F16427} The [sqlite3_result_int(C,V)] interface changes the -** return value of function C to be the 32-bit integer value V. -** -** {F16430} The [sqlite3_result_int64(C,V)] interface changes the -** return value of function C to be the 64-bit integer value V. -** -** {F16433} The [sqlite3_result_null(C)] interface changes the -** return value of function C to be NULL. -** -** {F16436} The [sqlite3_result_text(C,V,N,D)] interface changes the -** return value of function C to be the UTF8 string -** V up to the first zero if N is negative -** or the first N bytes of V if N is non-negative. -** -** {F16439} The [sqlite3_result_text16(C,V,N,D)] interface changes the -** return value of function C to be the UTF16 native byte order -** string V up to the first zero if N is -** negative or the first N bytes of V if N is non-negative. -** -** {F16442} The [sqlite3_result_text16be(C,V,N,D)] interface changes the -** return value of function C to be the UTF16 big-endian -** string V up to the first zero if N is -** is negative or the first N bytes or V if N is non-negative. -** -** {F16445} The [sqlite3_result_text16le(C,V,N,D)] interface changes the -** return value of function C to be the UTF16 little-endian -** string V up to the first zero if N is -** negative or the first N bytes of V if N is non-negative. -** -** {F16448} The [sqlite3_result_value(C,V)] interface changes the -** return value of function C to be [unprotected sqlite3_value] -** object V. -** -** {F16451} The [sqlite3_result_zeroblob(C,N)] interface changes the -** return value of function C to be an N-byte blob of all zeros. -** -** {F16454} The [sqlite3_result_error()] and [sqlite3_result_error16()] -** interfaces make a copy of their error message strings before -** returning. -** -** {F16457} If the D destructor parameter to [sqlite3_result_blob(C,V,N,D)], -** [sqlite3_result_text(C,V,N,D)], [sqlite3_result_text16(C,V,N,D)], -** [sqlite3_result_text16be(C,V,N,D)], or -** [sqlite3_result_text16le(C,V,N,D)] is the constant [SQLITE_STATIC] -** then no destructor is ever called on the pointer V and SQLite -** assumes that V is immutable. -** -** {F16460} If the D destructor parameter to [sqlite3_result_blob(C,V,N,D)], -** [sqlite3_result_text(C,V,N,D)], [sqlite3_result_text16(C,V,N,D)], -** [sqlite3_result_text16be(C,V,N,D)], or -** [sqlite3_result_text16le(C,V,N,D)] is the constant -** [SQLITE_TRANSIENT] then the interfaces makes a copy of the -** content of V and retains the copy. -** -** {F16463} If the D destructor parameter to [sqlite3_result_blob(C,V,N,D)], -** [sqlite3_result_text(C,V,N,D)], [sqlite3_result_text16(C,V,N,D)], -** [sqlite3_result_text16be(C,V,N,D)], or -** [sqlite3_result_text16le(C,V,N,D)] is some value other than -** the constants [SQLITE_STATIC] and [SQLITE_TRANSIENT] then -** SQLite will invoke the destructor D with V as its only argument -** when it has finished with the V value. -*/ -SQLITE_API void sqlite3_result_blob(sqlite3_context*, const void*, int, void(*)(void*)); -SQLITE_API void sqlite3_result_double(sqlite3_context*, double); -SQLITE_API void sqlite3_result_error(sqlite3_context*, const char*, int); -SQLITE_API void sqlite3_result_error16(sqlite3_context*, const void*, int); -SQLITE_API void sqlite3_result_error_toobig(sqlite3_context*); -SQLITE_API void sqlite3_result_error_nomem(sqlite3_context*); -SQLITE_API void sqlite3_result_error_code(sqlite3_context*, int); -SQLITE_API void sqlite3_result_int(sqlite3_context*, int); -SQLITE_API void sqlite3_result_int64(sqlite3_context*, sqlite3_int64); -SQLITE_API void sqlite3_result_null(sqlite3_context*); -SQLITE_API void sqlite3_result_text(sqlite3_context*, const char*, int, void(*)(void*)); -SQLITE_API void sqlite3_result_text16(sqlite3_context*, const void*, int, void(*)(void*)); -SQLITE_API void sqlite3_result_text16le(sqlite3_context*, const void*, int,void(*)(void*)); -SQLITE_API void sqlite3_result_text16be(sqlite3_context*, const void*, int,void(*)(void*)); -SQLITE_API void sqlite3_result_value(sqlite3_context*, sqlite3_value*); -SQLITE_API void sqlite3_result_zeroblob(sqlite3_context*, int n); - -/* -** CAPI3REF: Define New Collating Sequences {F16600} -** -** These functions are used to add new collation sequences to the -** [sqlite3*] handle specified as the first argument. -** -** The name of the new collation sequence is specified as a UTF-8 string -** for sqlite3_create_collation() and sqlite3_create_collation_v2() -** and a UTF-16 string for sqlite3_create_collation16(). In all cases -** the name is passed as the second function argument. -** -** The third argument may be one of the constants [SQLITE_UTF8], -** [SQLITE_UTF16LE] or [SQLITE_UTF16BE], indicating that the user-supplied -** routine expects to be passed pointers to strings encoded using UTF-8, -** UTF-16 little-endian or UTF-16 big-endian respectively. The -** third argument might also be [SQLITE_UTF16_ALIGNED] to indicate that -** the routine expects pointers to 16-bit word aligned strings -** of UTF16 in the native byte order of the host computer. -** -** A pointer to the user supplied routine must be passed as the fifth -** argument. If it is NULL, this is the same as deleting the collation -** sequence (so that SQLite cannot call it anymore). -** Each time the application -** supplied function is invoked, it is passed a copy of the void* passed as -** the fourth argument to sqlite3_create_collation() or -** sqlite3_create_collation16() as its first parameter. -** -** The remaining arguments to the application-supplied routine are two strings, -** each represented by a (length, data) pair and encoded in the encoding -** that was passed as the third argument when the collation sequence was -** registered. {END} The application defined collation routine should -** return negative, zero or positive if -** the first string is less than, equal to, or greater than the second -** string. i.e. (STRING1 - STRING2). -** -** The sqlite3_create_collation_v2() works like sqlite3_create_collation() -** excapt that it takes an extra argument which is a destructor for -** the collation. The destructor is called when the collation is -** destroyed and is passed a copy of the fourth parameter void* pointer -** of the sqlite3_create_collation_v2(). -** Collations are destroyed when -** they are overridden by later calls to the collation creation functions -** or when the [sqlite3*] database handle is closed using [sqlite3_close()]. -** -** INVARIANTS: -** -** {F16603} A successful call to the -** [sqlite3_create_collation_v2(B,X,E,P,F,D)] interface -** registers function F as the comparison function used to -** implement collation X on [database connection] B for -** databases having encoding E. -** -** {F16604} SQLite understands the X parameter to -** [sqlite3_create_collation_v2(B,X,E,P,F,D)] as a zero-terminated -** UTF-8 string in which case is ignored for ASCII characters and -** is significant for non-ASCII characters. -** -** {F16606} Successive calls to [sqlite3_create_collation_v2(B,X,E,P,F,D)] -** with the same values for B, X, and E, override prior values -** of P, F, and D. -** -** {F16609} The destructor D in [sqlite3_create_collation_v2(B,X,E,P,F,D)] -** is not NULL then it is called with argument P when the -** collating function is dropped by SQLite. -** -** {F16612} A collating function is dropped when it is overloaded. -** -** {F16615} A collating function is dropped when the database connection -** is closed using [sqlite3_close()]. -** -** {F16618} The pointer P in [sqlite3_create_collation_v2(B,X,E,P,F,D)] -** is passed through as the first parameter to the comparison -** function F for all subsequent invocations of F. -** -** {F16621} A call to [sqlite3_create_collation(B,X,E,P,F)] is exactly -** the same as a call to [sqlite3_create_collation_v2()] with -** the same parameters and a NULL destructor. -** -** {F16624} Following a [sqlite3_create_collation_v2(B,X,E,P,F,D)], -** SQLite uses the comparison function F for all text comparison -** operations on [database connection] B on text values that -** use the collating sequence name X. -** -** {F16627} The [sqlite3_create_collation16(B,X,E,P,F)] works the same -** as [sqlite3_create_collation(B,X,E,P,F)] except that the -** collation name X is understood as UTF-16 in native byte order -** instead of UTF-8. -** -** {F16630} When multiple comparison functions are available for the same -** collating sequence, SQLite chooses the one whose text encoding -** requires the least amount of conversion from the default -** text encoding of the database. -*/ -SQLITE_API int sqlite3_create_collation( - sqlite3*, - const char *zName, - int eTextRep, - void*, - int(*xCompare)(void*,int,const void*,int,const void*) -); -SQLITE_API int sqlite3_create_collation_v2( - sqlite3*, - const char *zName, - int eTextRep, - void*, - int(*xCompare)(void*,int,const void*,int,const void*), - void(*xDestroy)(void*) -); -SQLITE_API int sqlite3_create_collation16( - sqlite3*, - const char *zName, - int eTextRep, - void*, - int(*xCompare)(void*,int,const void*,int,const void*) -); - -/* -** CAPI3REF: Collation Needed Callbacks {F16700} -** -** To avoid having to register all collation sequences before a database -** can be used, a single callback function may be registered with the -** database handle to be called whenever an undefined collation sequence is -** required. -** -** If the function is registered using the sqlite3_collation_needed() API, -** then it is passed the names of undefined collation sequences as strings -** encoded in UTF-8. {F16703} If sqlite3_collation_needed16() is used, the names -** are passed as UTF-16 in machine native byte order. A call to either -** function replaces any existing callback. -** -** When the callback is invoked, the first argument passed is a copy -** of the second argument to sqlite3_collation_needed() or -** sqlite3_collation_needed16(). The second argument is the database -** handle. The third argument is one of [SQLITE_UTF8], -** [SQLITE_UTF16BE], or [SQLITE_UTF16LE], indicating the most -** desirable form of the collation sequence function required. -** The fourth parameter is the name of the -** required collation sequence. -** -** The callback function should register the desired collation using -** [sqlite3_create_collation()], [sqlite3_create_collation16()], or -** [sqlite3_create_collation_v2()]. -** -** INVARIANTS: -** -** {F16702} A successful call to [sqlite3_collation_needed(D,P,F)] -** or [sqlite3_collation_needed16(D,P,F)] causes -** the [database connection] D to invoke callback F with first -** parameter P whenever it needs a comparison function for a -** collating sequence that it does not know about. -** -** {F16704} Each successful call to [sqlite3_collation_needed()] or -** [sqlite3_collation_needed16()] overrides the callback registered -** on the same [database connection] by prior calls to either -** interface. -** -** {F16706} The name of the requested collating function passed in the -** 4th parameter to the callback is in UTF-8 if the callback -** was registered using [sqlite3_collation_needed()] and -** is in UTF-16 native byte order if the callback was -** registered using [sqlite3_collation_needed16()]. -** -** -*/ -SQLITE_API int sqlite3_collation_needed( - sqlite3*, - void*, - void(*)(void*,sqlite3*,int eTextRep,const char*) -); -SQLITE_API int sqlite3_collation_needed16( - sqlite3*, - void*, - void(*)(void*,sqlite3*,int eTextRep,const void*) -); - -/* -** Specify the key for an encrypted database. This routine should be -** called right after sqlite3_open(). -** -** The code to implement this API is not available in the public release -** of SQLite. -*/ -SQLITE_API int sqlite3_key( - sqlite3 *db, /* Database to be rekeyed */ - const void *pKey, int nKey /* The key */ -); - -/* -** Change the key on an open database. If the current database is not -** encrypted, this routine will encrypt it. If pNew==0 or nNew==0, the -** database is decrypted. -** -** The code to implement this API is not available in the public release -** of SQLite. -*/ -SQLITE_API int sqlite3_rekey( - sqlite3 *db, /* Database to be rekeyed */ - const void *pKey, int nKey /* The new key */ -); - -/* -** CAPI3REF: Suspend Execution For A Short Time {F10530} -** -** The sqlite3_sleep() function -** causes the current thread to suspend execution -** for at least a number of milliseconds specified in its parameter. -** -** If the operating system does not support sleep requests with -** millisecond time resolution, then the time will be rounded up to -** the nearest second. The number of milliseconds of sleep actually -** requested from the operating system is returned. -** -** SQLite implements this interface by calling the xSleep() -** method of the default [sqlite3_vfs] object. -** -** INVARIANTS: -** -** {F10533} The [sqlite3_sleep(M)] interface invokes the xSleep -** method of the default [sqlite3_vfs|VFS] in order to -** suspend execution of the current thread for at least -** M milliseconds. -** -** {F10536} The [sqlite3_sleep(M)] interface returns the number of -** milliseconds of sleep actually requested of the operating -** system, which might be larger than the parameter M. -*/ -SQLITE_API int sqlite3_sleep(int); - -/* -** CAPI3REF: Name Of The Folder Holding Temporary Files {F10310} -** -** If this global variable is made to point to a string which is -** the name of a folder (a.ka. directory), then all temporary files -** created by SQLite will be placed in that directory. If this variable -** is NULL pointer, then SQLite does a search for an appropriate temporary -** file directory. -** -** It is not safe to modify this variable once a database connection -** has been opened. It is intended that this variable be set once -** as part of process initialization and before any SQLite interface -** routines have been call and remain unchanged thereafter. -*/ -SQLITE_API char *sqlite3_temp_directory; - -/* -** CAPI3REF: Test To See If The Database Is In Auto-Commit Mode {F12930} -** -** The sqlite3_get_autocommit() interfaces returns non-zero or -** zero if the given database connection is or is not in autocommit mode, -** respectively. Autocommit mode is on -** by default. Autocommit mode is disabled by a [BEGIN] statement. -** Autocommit mode is reenabled by a [COMMIT] or [ROLLBACK]. -** -** If certain kinds of errors occur on a statement within a multi-statement -** transactions (errors including [SQLITE_FULL], [SQLITE_IOERR], -** [SQLITE_NOMEM], [SQLITE_BUSY], and [SQLITE_INTERRUPT]) then the -** transaction might be rolled back automatically. The only way to -** find out if SQLite automatically rolled back the transaction after -** an error is to use this function. -** -** INVARIANTS: -** -** {F12931} The [sqlite3_get_autocommit(D)] interface returns non-zero or -** zero if the [database connection] D is or is not in autocommit -** mode, respectively. -** -** {F12932} Autocommit mode is on by default. -** -** {F12933} Autocommit mode is disabled by a successful [BEGIN] statement. -** -** {F12934} Autocommit mode is enabled by a successful [COMMIT] or [ROLLBACK] -** statement. -** -** -** LIMITATIONS: -*** -** {U12936} If another thread changes the autocommit status of the database -** connection while this routine is running, then the return value -** is undefined. -*/ -SQLITE_API int sqlite3_get_autocommit(sqlite3*); - -/* -** CAPI3REF: Find The Database Handle Of A Prepared Statement {F13120} -** -** The sqlite3_db_handle interface -** returns the [sqlite3*] database handle to which a -** [prepared statement] belongs. -** The database handle returned by sqlite3_db_handle -** is the same database handle that was -** the first argument to the [sqlite3_prepare_v2()] or its variants -** that was used to create the statement in the first place. -** -** INVARIANTS: -** -** {F13123} The [sqlite3_db_handle(S)] interface returns a pointer -** to the [database connection] associated with -** [prepared statement] S. -*/ -SQLITE_API sqlite3 *sqlite3_db_handle(sqlite3_stmt*); - - -/* -** CAPI3REF: Commit And Rollback Notification Callbacks {F12950} -** -** The sqlite3_commit_hook() interface registers a callback -** function to be invoked whenever a transaction is committed. -** Any callback set by a previous call to sqlite3_commit_hook() -** for the same database connection is overridden. -** The sqlite3_rollback_hook() interface registers a callback -** function to be invoked whenever a transaction is committed. -** Any callback set by a previous call to sqlite3_commit_hook() -** for the same database connection is overridden. -** The pArg argument is passed through -** to the callback. If the callback on a commit hook function -** returns non-zero, then the commit is converted into a rollback. -** -** If another function was previously registered, its -** pArg value is returned. Otherwise NULL is returned. -** -** Registering a NULL function disables the callback. -** -** For the purposes of this API, a transaction is said to have been -** rolled back if an explicit "ROLLBACK" statement is executed, or -** an error or constraint causes an implicit rollback to occur. -** The rollback callback is not invoked if a transaction is -** automatically rolled back because the database connection is closed. -** The rollback callback is not invoked if a transaction is -** rolled back because a commit callback returned non-zero. -** Check on this -** -** These are experimental interfaces and are subject to change. -** -** INVARIANTS: -** -** {F12951} The [sqlite3_commit_hook(D,F,P)] interface registers the -** callback function F to be invoked with argument P whenever -** a transaction commits on [database connection] D. -** -** {F12952} The [sqlite3_commit_hook(D,F,P)] interface returns the P -** argument from the previous call with the same -** [database connection ] D , or NULL on the first call -** for a particular [database connection] D. -** -** {F12953} Each call to [sqlite3_commit_hook()] overwrites the callback -** registered by prior calls. -** -** {F12954} If the F argument to [sqlite3_commit_hook(D,F,P)] is NULL -** then the commit hook callback is cancelled and no callback -** is invoked when a transaction commits. -** -** {F12955} If the commit callback returns non-zero then the commit is -** converted into a rollback. -** -** {F12961} The [sqlite3_rollback_hook(D,F,P)] interface registers the -** callback function F to be invoked with argument P whenever -** a transaction rolls back on [database connection] D. -** -** {F12962} The [sqlite3_rollback_hook(D,F,P)] interface returns the P -** argument from the previous call with the same -** [database connection ] D , or NULL on the first call -** for a particular [database connection] D. -** -** {F12963} Each call to [sqlite3_rollback_hook()] overwrites the callback -** registered by prior calls. -** -** {F12964} If the F argument to [sqlite3_rollback_hook(D,F,P)] is NULL -** then the rollback hook callback is cancelled and no callback -** is invoked when a transaction rolls back. -*/ -SQLITE_API void *sqlite3_commit_hook(sqlite3*, int(*)(void*), void*); -SQLITE_API void *sqlite3_rollback_hook(sqlite3*, void(*)(void *), void*); - -/* -** CAPI3REF: Data Change Notification Callbacks {F12970} -** -** The sqlite3_update_hook() interface -** registers a callback function with the database connection identified by the -** first argument to be invoked whenever a row is updated, inserted or deleted. -** Any callback set by a previous call to this function for the same -** database connection is overridden. -** -** The second argument is a pointer to the function to invoke when a -** row is updated, inserted or deleted. -** The first argument to the callback is -** a copy of the third argument to sqlite3_update_hook(). -** The second callback -** argument is one of [SQLITE_INSERT], [SQLITE_DELETE] or [SQLITE_UPDATE], -** depending on the operation that caused the callback to be invoked. -** The third and -** fourth arguments to the callback contain pointers to the database and -** table name containing the affected row. -** The final callback parameter is -** the rowid of the row. -** In the case of an update, this is the rowid after -** the update takes place. -** -** The update hook is not invoked when internal system tables are -** modified (i.e. sqlite_master and sqlite_sequence). -** -** If another function was previously registered, its pArg value -** is returned. Otherwise NULL is returned. -** -** INVARIANTS: -** -** {F12971} The [sqlite3_update_hook(D,F,P)] interface causes callback -** function F to be invoked with first parameter P whenever -** a table row is modified, inserted, or deleted on -** [database connection] D. -** -** {F12973} The [sqlite3_update_hook(D,F,P)] interface returns the value -** of P for the previous call on the same [database connection] D, -** or NULL for the first call. -** -** {F12975} If the update hook callback F in [sqlite3_update_hook(D,F,P)] -** is NULL then the no update callbacks are made. -** -** {F12977} Each call to [sqlite3_update_hook(D,F,P)] overrides prior calls -** to the same interface on the same [database connection] D. -** -** {F12979} The update hook callback is not invoked when internal system -** tables such as sqlite_master and sqlite_sequence are modified. -** -** {F12981} The second parameter to the update callback -** is one of [SQLITE_INSERT], [SQLITE_DELETE] or [SQLITE_UPDATE], -** depending on the operation that caused the callback to be invoked. -** -** {F12983} The third and fourth arguments to the callback contain pointers -** to zero-terminated UTF-8 strings which are the names of the -** database and table that is being updated. - -** {F12985} The final callback parameter is the rowid of the row after -** the change occurs. -*/ -SQLITE_API void *sqlite3_update_hook( - sqlite3*, - void(*)(void *,int ,char const *,char const *,sqlite3_int64), - void* -); - -/* -** CAPI3REF: Enable Or Disable Shared Pager Cache {F10330} -** -** This routine enables or disables the sharing of the database cache -** and schema data structures between connections to the same database. -** Sharing is enabled if the argument is true and disabled if the argument -** is false. -** -** Cache sharing is enabled and disabled -** for an entire process. {END} This is a change as of SQLite version 3.5.0. -** In prior versions of SQLite, sharing was -** enabled or disabled for each thread separately. -** -** The cache sharing mode set by this interface effects all subsequent -** calls to [sqlite3_open()], [sqlite3_open_v2()], and [sqlite3_open16()]. -** Existing database connections continue use the sharing mode -** that was in effect at the time they were opened. -** -** Virtual tables cannot be used with a shared cache. When shared -** cache is enabled, the [sqlite3_create_module()] API used to register -** virtual tables will always return an error. -** -** This routine returns [SQLITE_OK] if shared cache was -** enabled or disabled successfully. An [error code] -** is returned otherwise. -** -** Shared cache is disabled by default. But this might change in -** future releases of SQLite. Applications that care about shared -** cache setting should set it explicitly. -** -** INVARIANTS: -** -** {F10331} A successful invocation of [sqlite3_enable_shared_cache(B)] -** will enable or disable shared cache mode for any subsequently -** created [database connection] in the same process. -** -** {F10336} When shared cache is enabled, the [sqlite3_create_module()] -** interface will always return an error. -** -** {F10337} The [sqlite3_enable_shared_cache(B)] interface returns -** [SQLITE_OK] if shared cache was enabled or disabled successfully. -** -** {F10339} Shared cache is disabled by default. -*/ -SQLITE_API int sqlite3_enable_shared_cache(int); - -/* -** CAPI3REF: Attempt To Free Heap Memory {F17340} -** -** The sqlite3_release_memory() interface attempts to -** free N bytes of heap memory by deallocating non-essential memory -** allocations held by the database labrary. {END} Memory used -** to cache database pages to improve performance is an example of -** non-essential memory. Sqlite3_release_memory() returns -** the number of bytes actually freed, which might be more or less -** than the amount requested. -** -** INVARIANTS: -** -** {F17341} The [sqlite3_release_memory(N)] interface attempts to -** free N bytes of heap memory by deallocating non-essential -** memory allocations held by the database labrary. -** -** {F16342} The [sqlite3_release_memory(N)] returns the number -** of bytes actually freed, which might be more or less -** than the amount requested. -*/ -SQLITE_API int sqlite3_release_memory(int); - -/* -** CAPI3REF: Impose A Limit On Heap Size {F17350} -** -** The sqlite3_soft_heap_limit() interface -** places a "soft" limit on the amount of heap memory that may be allocated -** by SQLite. If an internal allocation is requested -** that would exceed the soft heap limit, [sqlite3_release_memory()] is -** invoked one or more times to free up some space before the allocation -** is made. -** -** The limit is called "soft", because if -** [sqlite3_release_memory()] cannot -** free sufficient memory to prevent the limit from being exceeded, -** the memory is allocated anyway and the current operation proceeds. -** -** A negative or zero value for N means that there is no soft heap limit and -** [sqlite3_release_memory()] will only be called when memory is exhausted. -** The default value for the soft heap limit is zero. -** -** SQLite makes a best effort to honor the soft heap limit. -** But if the soft heap limit cannot honored, execution will -** continue without error or notification. This is why the limit is -** called a "soft" limit. It is advisory only. -** -** Prior to SQLite version 3.5.0, this routine only constrained the memory -** allocated by a single thread - the same thread in which this routine -** runs. Beginning with SQLite version 3.5.0, the soft heap limit is -** applied to all threads. The value specified for the soft heap limit -** is an upper bound on the total memory allocation for all threads. In -** version 3.5.0 there is no mechanism for limiting the heap usage for -** individual threads. -** -** INVARIANTS: -** -** {F16351} The [sqlite3_soft_heap_limit(N)] interface places a soft limit -** of N bytes on the amount of heap memory that may be allocated -** using [sqlite3_malloc()] or [sqlite3_realloc()] at any point -** in time. -** -** {F16352} If a call to [sqlite3_malloc()] or [sqlite3_realloc()] would -** cause the total amount of allocated memory to exceed the -** soft heap limit, then [sqlite3_release_memory()] is invoked -** in an attempt to reduce the memory usage prior to proceeding -** with the memory allocation attempt. -** -** {F16353} Calls to [sqlite3_malloc()] or [sqlite3_realloc()] that trigger -** attempts to reduce memory usage through the soft heap limit -** mechanism continue even if the attempt to reduce memory -** usage is unsuccessful. -** -** {F16354} A negative or zero value for N in a call to -** [sqlite3_soft_heap_limit(N)] means that there is no soft -** heap limit and [sqlite3_release_memory()] will only be -** called when memory is completely exhausted. -** -** {F16355} The default value for the soft heap limit is zero. -** -** {F16358} Each call to [sqlite3_soft_heap_limit(N)] overrides the -** values set by all prior calls. -*/ -SQLITE_API void sqlite3_soft_heap_limit(int); - -/* -** CAPI3REF: Extract Metadata About A Column Of A Table {F12850} -** -** This routine -** returns meta-data about a specific column of a specific database -** table accessible using the connection handle passed as the first function -** argument. -** -** The column is identified by the second, third and fourth parameters to -** this function. The second parameter is either the name of the database -** (i.e. "main", "temp" or an attached database) containing the specified -** table or NULL. If it is NULL, then all attached databases are searched -** for the table using the same algorithm as the database engine uses to -** resolve unqualified table references. -** -** The third and fourth parameters to this function are the table and column -** name of the desired column, respectively. Neither of these parameters -** may be NULL. -** -** Meta information is returned by writing to the memory locations passed as -** the 5th and subsequent parameters to this function. Any of these -** arguments may be NULL, in which case the corresponding element of meta -** information is ommitted. -** -** 
-** Parameter     Output Type      Description
-** -----------------------------------
-**
-**   5th         const char*      Data type
-**   6th         const char*      Name of the default collation sequence 
-**   7th         int              True if the column has a NOT NULL constraint
-**   8th         int              True if the column is part of the PRIMARY KEY
-**   9th         int              True if the column is AUTOINCREMENT
-**
-** -** -** The memory pointed to by the character pointers returned for the -** declaration type and collation sequence is valid only until the next -** call to any sqlite API function. -** -** If the specified table is actually a view, then an error is returned. -** -** If the specified column is "rowid", "oid" or "_rowid_" and an -** INTEGER PRIMARY KEY column has been explicitly declared, then the output -** parameters are set for the explicitly declared column. If there is no -** explicitly declared IPK column, then the output parameters are set as -** follows: -** -** 
-**     data type: "INTEGER"
-**     collation sequence: "BINARY"
-**     not null: 0
-**     primary key: 1
-**     auto increment: 0
-**
-** -** This function may load one or more schemas from database files. If an -** error occurs during this process, or if the requested table or column -** cannot be found, an SQLITE error code is returned and an error message -** left in the database handle (to be retrieved using sqlite3_errmsg()). -** -** This API is only available if the library was compiled with the -** SQLITE_ENABLE_COLUMN_METADATA preprocessor symbol defined. -*/ -SQLITE_API int sqlite3_table_column_metadata( - sqlite3 *db, /* Connection handle */ - const char *zDbName, /* Database name or NULL */ - const char *zTableName, /* Table name */ - const char *zColumnName, /* Column name */ - char const **pzDataType, /* OUTPUT: Declared data type */ - char const **pzCollSeq, /* OUTPUT: Collation sequence name */ - int *pNotNull, /* OUTPUT: True if NOT NULL constraint exists */ - int *pPrimaryKey, /* OUTPUT: True if column part of PK */ - int *pAutoinc /* OUTPUT: True if column is auto-increment */ -); - -/* -** CAPI3REF: Load An Extension {F12600} -** -** {F12601} The sqlite3_load_extension() interface -** attempts to load an SQLite extension library contained in the file -** zFile. {F12602} The entry point is zProc. {F12603} zProc may be 0 -** in which case the name of the entry point defaults -** to "sqlite3_extension_init". -** -** {F12604} The sqlite3_load_extension() interface shall -** return [SQLITE_OK] on success and [SQLITE_ERROR] if something goes wrong. -** -** {F12605} -** If an error occurs and pzErrMsg is not 0, then the -** sqlite3_load_extension() interface shall attempt to fill *pzErrMsg with -** error message text stored in memory obtained from [sqlite3_malloc()]. -** {END} The calling function should free this memory -** by calling [sqlite3_free()]. -** -** {F12606} -** Extension loading must be enabled using [sqlite3_enable_load_extension()] -** prior to calling this API or an error will be returned. -*/ -SQLITE_API int sqlite3_load_extension( - sqlite3 *db, /* Load the extension into this database connection */ - const char *zFile, /* Name of the shared library containing extension */ - const char *zProc, /* Entry point. Derived from zFile if 0 */ - char **pzErrMsg /* Put error message here if not 0 */ -); - -/* -** CAPI3REF: Enable Or Disable Extension Loading {F12620} -** -** So as not to open security holes in older applications that are -** unprepared to deal with extension loading, and as a means of disabling -** extension loading while evaluating user-entered SQL, the following -** API is provided to turn the [sqlite3_load_extension()] mechanism on and -** off. {F12622} It is off by default. {END} See ticket #1863. -** -** {F12621} Call the sqlite3_enable_load_extension() routine -** with onoff==1 to turn extension loading on -** and call it with onoff==0 to turn it back off again. {END} -*/ -SQLITE_API int sqlite3_enable_load_extension(sqlite3 *db, int onoff); - -/* -** CAPI3REF: Make Arrangements To Automatically Load An Extension {F12640} -** -** {F12641} This function -** registers an extension entry point that is automatically invoked -** whenever a new database connection is opened using -** [sqlite3_open()], [sqlite3_open16()], or [sqlite3_open_v2()]. {END} -** -** This API can be invoked at program startup in order to register -** one or more statically linked extensions that will be available -** to all new database connections. -** -** {F12642} Duplicate extensions are detected so calling this routine multiple -** times with the same extension is harmless. -** -** {F12643} This routine stores a pointer to the extension in an array -** that is obtained from sqlite_malloc(). {END} If you run a memory leak -** checker on your program and it reports a leak because of this -** array, then invoke [sqlite3_reset_auto_extension()] prior -** to shutdown to free the memory. -** -** {F12644} Automatic extensions apply across all threads. {END} -** -** This interface is experimental and is subject to change or -** removal in future releases of SQLite. -*/ -SQLITE_API int sqlite3_auto_extension(void *xEntryPoint); - - -/* -** CAPI3REF: Reset Automatic Extension Loading {F12660} -** -** {F12661} This function disables all previously registered -** automatic extensions. {END} This -** routine undoes the effect of all prior [sqlite3_auto_extension()] -** calls. -** -** {F12662} This call disabled automatic extensions in all threads. {END} -** -** This interface is experimental and is subject to change or -** removal in future releases of SQLite. -*/ -SQLITE_API void sqlite3_reset_auto_extension(void); - - -/* -****** EXPERIMENTAL - subject to change without notice ************** -** -** The interface to the virtual-table mechanism is currently considered -** to be experimental. The interface might change in incompatible ways. -** If this is a problem for you, do not use the interface at this time. -** -** When the virtual-table mechanism stablizes, we will declare the -** interface fixed, support it indefinitely, and remove this comment. -*/ - -/* -** Structures used by the virtual table interface -*/ -typedef struct sqlite3_vtab sqlite3_vtab; -typedef struct sqlite3_index_info sqlite3_index_info; -typedef struct sqlite3_vtab_cursor sqlite3_vtab_cursor; -typedef struct sqlite3_module sqlite3_module; - -/* -** CAPI3REF: Virtual Table Object {F18000} -** KEYWORDS: sqlite3_module -** -** A module is a class of virtual tables. Each module is defined -** by an instance of the following structure. This structure consists -** mostly of methods for the module. -*/ -struct sqlite3_module { - int iVersion; - int (*xCreate)(sqlite3*, void *pAux, - int argc, const char *const*argv, - sqlite3_vtab **ppVTab, char**); - int (*xConnect)(sqlite3*, void *pAux, - int argc, const char *const*argv, - sqlite3_vtab **ppVTab, char**); - int (*xBestIndex)(sqlite3_vtab *pVTab, sqlite3_index_info*); - int (*xDisconnect)(sqlite3_vtab *pVTab); - int (*xDestroy)(sqlite3_vtab *pVTab); - int (*xOpen)(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCursor); - int (*xClose)(sqlite3_vtab_cursor*); - int (*xFilter)(sqlite3_vtab_cursor*, int idxNum, const char *idxStr, - int argc, sqlite3_value **argv); - int (*xNext)(sqlite3_vtab_cursor*); - int (*xEof)(sqlite3_vtab_cursor*); - int (*xColumn)(sqlite3_vtab_cursor*, sqlite3_context*, int); - int (*xRowid)(sqlite3_vtab_cursor*, sqlite3_int64 *pRowid); - int (*xUpdate)(sqlite3_vtab *, int, sqlite3_value **, sqlite3_int64 *); - int (*xBegin)(sqlite3_vtab *pVTab); - int (*xSync)(sqlite3_vtab *pVTab); - int (*xCommit)(sqlite3_vtab *pVTab); - int (*xRollback)(sqlite3_vtab *pVTab); - int (*xFindFunction)(sqlite3_vtab *pVtab, int nArg, const char *zName, - void (**pxFunc)(sqlite3_context*,int,sqlite3_value**), - void **ppArg); - - int (*xRename)(sqlite3_vtab *pVtab, const char *zNew); -}; - -/* -** CAPI3REF: Virtual Table Indexing Information {F18100} -** KEYWORDS: sqlite3_index_info -** -** The sqlite3_index_info structure and its substructures is used to -** pass information into and receive the reply from the xBestIndex -** method of an sqlite3_module. The fields under **Inputs** are the -** inputs to xBestIndex and are read-only. xBestIndex inserts its -** results into the **Outputs** fields. -** -** The aConstraint[] array records WHERE clause constraints of the -** form: -** -** column OP expr -** -** Where OP is =, <, <=, >, or >=. -** The particular operator is stored -** in aConstraint[].op. The index of the column is stored in -** aConstraint[].iColumn. aConstraint[].usable is TRUE if the -** expr on the right-hand side can be evaluated (and thus the constraint -** is usable) and false if it cannot. -** -** The optimizer automatically inverts terms of the form "expr OP column" -** and makes other simplifications to the WHERE clause in an attempt to -** get as many WHERE clause terms into the form shown above as possible. -** The aConstraint[] array only reports WHERE clause terms in the correct -** form that refer to the particular virtual table being queried. -** -** Information about the ORDER BY clause is stored in aOrderBy[]. -** Each term of aOrderBy records a column of the ORDER BY clause. -** -** The xBestIndex method must fill aConstraintUsage[] with information -** about what parameters to pass to xFilter. If argvIndex>0 then -** the right-hand side of the corresponding aConstraint[] is evaluated -** and becomes the argvIndex-th entry in argv. If aConstraintUsage[].omit -** is true, then the constraint is assumed to be fully handled by the -** virtual table and is not checked again by SQLite. -** -** The idxNum and idxPtr values are recorded and passed into xFilter. -** sqlite3_free() is used to free idxPtr if needToFreeIdxPtr is true. -** -** The orderByConsumed means that output from xFilter will occur in -** the correct order to satisfy the ORDER BY clause so that no separate -** sorting step is required. -** -** The estimatedCost value is an estimate of the cost of doing the -** particular lookup. A full scan of a table with N entries should have -** a cost of N. A binary search of a table of N entries should have a -** cost of approximately log(N). -*/ -struct sqlite3_index_info { - /* Inputs */ - int nConstraint; /* Number of entries in aConstraint */ - struct sqlite3_index_constraint { - int iColumn; /* Column on left-hand side of constraint */ - unsigned char op; /* Constraint operator */ - unsigned char usable; /* True if this constraint is usable */ - int iTermOffset; /* Used internally - xBestIndex should ignore */ - } *aConstraint; /* Table of WHERE clause constraints */ - int nOrderBy; /* Number of terms in the ORDER BY clause */ - struct sqlite3_index_orderby { - int iColumn; /* Column number */ - unsigned char desc; /* True for DESC. False for ASC. */ - } *aOrderBy; /* The ORDER BY clause */ - - /* Outputs */ - struct sqlite3_index_constraint_usage { - int argvIndex; /* if >0, constraint is part of argv to xFilter */ - unsigned char omit; /* Do not code a test for this constraint */ - } *aConstraintUsage; - int idxNum; /* Number used to identify the index */ - char *idxStr; /* String, possibly obtained from sqlite3_malloc */ - int needToFreeIdxStr; /* Free idxStr using sqlite3_free() if true */ - int orderByConsumed; /* True if output is already ordered */ - double estimatedCost; /* Estimated cost of using this index */ -}; -#define SQLITE_INDEX_CONSTRAINT_EQ 2 -#define SQLITE_INDEX_CONSTRAINT_GT 4 -#define SQLITE_INDEX_CONSTRAINT_LE 8 -#define SQLITE_INDEX_CONSTRAINT_LT 16 -#define SQLITE_INDEX_CONSTRAINT_GE 32 -#define SQLITE_INDEX_CONSTRAINT_MATCH 64 - -/* -** CAPI3REF: Register A Virtual Table Implementation {F18200} -** -** This routine is used to register a new module name with an SQLite -** connection. Module names must be registered before creating new -** virtual tables on the module, or before using preexisting virtual -** tables of the module. -*/ -SQLITE_API int sqlite3_create_module( - sqlite3 *db, /* SQLite connection to register module with */ - const char *zName, /* Name of the module */ - const sqlite3_module *, /* Methods for the module */ - void * /* Client data for xCreate/xConnect */ -); - -/* -** CAPI3REF: Register A Virtual Table Implementation {F18210} -** -** This routine is identical to the sqlite3_create_module() method above, -** except that it allows a destructor function to be specified. It is -** even more experimental than the rest of the virtual tables API. -*/ -SQLITE_API int sqlite3_create_module_v2( - sqlite3 *db, /* SQLite connection to register module with */ - const char *zName, /* Name of the module */ - const sqlite3_module *, /* Methods for the module */ - void *, /* Client data for xCreate/xConnect */ - void(*xDestroy)(void*) /* Module destructor function */ -); - -/* -** CAPI3REF: Virtual Table Instance Object {F18010} -** KEYWORDS: sqlite3_vtab -** -** Every module implementation uses a subclass of the following structure -** to describe a particular instance of the module. Each subclass will -** be tailored to the specific needs of the module implementation. The -** purpose of this superclass is to define certain fields that are common -** to all module implementations. -** -** Virtual tables methods can set an error message by assigning a -** string obtained from sqlite3_mprintf() to zErrMsg. The method should -** take care that any prior string is freed by a call to sqlite3_free() -** prior to assigning a new string to zErrMsg. After the error message -** is delivered up to the client application, the string will be automatically -** freed by sqlite3_free() and the zErrMsg field will be zeroed. Note -** that sqlite3_mprintf() and sqlite3_free() are used on the zErrMsg field -** since virtual tables are commonly implemented in loadable extensions which -** do not have access to sqlite3MPrintf() or sqlite3Free(). -*/ -struct sqlite3_vtab { - const sqlite3_module *pModule; /* The module for this virtual table */ - int nRef; /* Used internally */ - char *zErrMsg; /* Error message from sqlite3_mprintf() */ - /* Virtual table implementations will typically add additional fields */ -}; - -/* -** CAPI3REF: Virtual Table Cursor Object {F18020} -** KEYWORDS: sqlite3_vtab_cursor -** -** Every module implementation uses a subclass of the following structure -** to describe cursors that point into the virtual table and are used -** to loop through the virtual table. Cursors are created using the -** xOpen method of the module. Each module implementation will define -** the content of a cursor structure to suit its own needs. -** -** This superclass exists in order to define fields of the cursor that -** are common to all implementations. -*/ -struct sqlite3_vtab_cursor { - sqlite3_vtab *pVtab; /* Virtual table of this cursor */ - /* Virtual table implementations will typically add additional fields */ -}; - -/* -** CAPI3REF: Declare The Schema Of A Virtual Table {F18280} -** -** The xCreate and xConnect methods of a module use the following API -** to declare the format (the names and datatypes of the columns) of -** the virtual tables they implement. -*/ -SQLITE_API int sqlite3_declare_vtab(sqlite3*, const char *zCreateTable); - -/* -** CAPI3REF: Overload A Function For A Virtual Table {F18300} -** -** Virtual tables can provide alternative implementations of functions -** using the xFindFunction method. But global versions of those functions -** must exist in order to be overloaded. -** -** This API makes sure a global version of a function with a particular -** name and number of parameters exists. If no such function exists -** before this API is called, a new function is created. The implementation -** of the new function always causes an exception to be thrown. So -** the new function is not good for anything by itself. Its only -** purpose is to be a place-holder function that can be overloaded -** by virtual tables. -** -** This API should be considered part of the virtual table interface, -** which is experimental and subject to change. -*/ -SQLITE_API int sqlite3_overload_function(sqlite3*, const char *zFuncName, int nArg); - -/* -** The interface to the virtual-table mechanism defined above (back up -** to a comment remarkably similar to this one) is currently considered -** to be experimental. The interface might change in incompatible ways. -** If this is a problem for you, do not use the interface at this time. -** -** When the virtual-table mechanism stabilizes, we will declare the -** interface fixed, support it indefinitely, and remove this comment. -** -****** EXPERIMENTAL - subject to change without notice ************** -*/ - -/* -** CAPI3REF: A Handle To An Open BLOB {F17800} -** -** An instance of this object represents an open BLOB on which -** incremental I/O can be preformed. -** Objects of this type are created by -** [sqlite3_blob_open()] and destroyed by [sqlite3_blob_close()]. -** The [sqlite3_blob_read()] and [sqlite3_blob_write()] interfaces -** can be used to read or write small subsections of the blob. -** The [sqlite3_blob_bytes()] interface returns the size of the -** blob in bytes. -*/ -typedef struct sqlite3_blob sqlite3_blob; - -/* -** CAPI3REF: Open A BLOB For Incremental I/O {F17810} -** -** This interfaces opens a handle to the blob located -** in row iRow, column zColumn, table zTable in database zDb; -** in other words, the same blob that would be selected by: -** -** 
-**     SELECT zColumn FROM zDb.zTable WHERE rowid = iRow;
-**
{END} -** -** If the flags parameter is non-zero, the blob is opened for -** read and write access. If it is zero, the blob is opened for read -** access. -** -** Note that the database name is not the filename that contains -** the database but rather the symbolic name of the database that -** is assigned when the database is connected using [ATTACH]. -** For the main database file, the database name is "main". For -** TEMP tables, the database name is "temp". -** -** On success, [SQLITE_OK] is returned and the new -** [sqlite3_blob | blob handle] is written to *ppBlob. -** Otherwise an error code is returned and -** any value written to *ppBlob should not be used by the caller. -** This function sets the database-handle error code and message -** accessible via [sqlite3_errcode()] and [sqlite3_errmsg()]. -** -** INVARIANTS: -** -** {F17813} A successful invocation of the [sqlite3_blob_open(D,B,T,C,R,F,P)] -** interface opens an [sqlite3_blob] object P on the blob -** in column C of table T in database B on [database connection] D. -** -** {F17814} A successful invocation of [sqlite3_blob_open(D,...)] starts -** a new transaction on [database connection] D if that connection -** is not already in a transaction. -** -** {F17816} The [sqlite3_blob_open(D,B,T,C,R,F,P)] interface opens the blob -** for read and write access if and only if the F parameter -** is non-zero. -** -** {F17819} The [sqlite3_blob_open()] interface returns [SQLITE_OK] on -** success and an appropriate [error code] on failure. -** -** {F17821} If an error occurs during evaluation of [sqlite3_blob_open(D,...)] -** then subsequent calls to [sqlite3_errcode(D)], -** [sqlite3_errmsg(D)], and [sqlite3_errmsg16(D)] will return -** information approprate for that error. -*/ -SQLITE_API int sqlite3_blob_open( - sqlite3*, - const char *zDb, - const char *zTable, - const char *zColumn, - sqlite3_int64 iRow, - int flags, - sqlite3_blob **ppBlob -); - -/* -** CAPI3REF: Close A BLOB Handle {F17830} -** -** Close an open [sqlite3_blob | blob handle]. -** -** Closing a BLOB shall cause the current transaction to commit -** if there are no other BLOBs, no pending prepared statements, and the -** database connection is in autocommit mode. -** If any writes were made to the BLOB, they might be held in cache -** until the close operation if they will fit. {END} -** Closing the BLOB often forces the changes -** out to disk and so if any I/O errors occur, they will likely occur -** at the time when the BLOB is closed. {F17833} Any errors that occur during -** closing are reported as a non-zero return value. -** -** The BLOB is closed unconditionally. Even if this routine returns -** an error code, the BLOB is still closed. -** -** INVARIANTS: -** -** {F17833} The [sqlite3_blob_close(P)] interface closes an -** [sqlite3_blob] object P previously opened using -** [sqlite3_blob_open()]. -** -** {F17836} Closing an [sqlite3_blob] object using -** [sqlite3_blob_close()] shall cause the current transaction to -** commit if there are no other open [sqlite3_blob] objects -** or [prepared statements] on the same [database connection] and -** the [database connection] is in -** [sqlite3_get_autocommit | autocommit mode]. -** -** {F17839} The [sqlite3_blob_close(P)] interfaces closes the -** [sqlite3_blob] object P unconditionally, even if -** [sqlite3_blob_close(P)] returns something other than [SQLITE_OK]. -** -*/ -SQLITE_API int sqlite3_blob_close(sqlite3_blob *); - -/* -** CAPI3REF: Return The Size Of An Open BLOB {F17840} -** -** Return the size in bytes of the blob accessible via the open -** [sqlite3_blob] object in its only argument. -** -** INVARIANTS: -** -** {F17843} The [sqlite3_blob_bytes(P)] interface returns the size -** in bytes of the BLOB that the [sqlite3_blob] object P -** refers to. -*/ -SQLITE_API int sqlite3_blob_bytes(sqlite3_blob *); - -/* -** CAPI3REF: Read Data From A BLOB Incrementally {F17850} -** -** This function is used to read data from an open -** [sqlite3_blob | blob-handle] into a caller supplied buffer. -** N bytes of data are copied into buffer -** Z from the open blob, starting at offset iOffset. -** -** If offset iOffset is less than N bytes from the end of the blob, -** [SQLITE_ERROR] is returned and no data is read. If N or iOffset is -** less than zero [SQLITE_ERROR] is returned and no data is read. -** -** On success, SQLITE_OK is returned. Otherwise, an -** [error code] or an [extended error code] is returned. -** -** INVARIANTS: -** -** {F17853} The [sqlite3_blob_read(P,Z,N,X)] interface reads N bytes -** beginning at offset X from -** the blob that [sqlite3_blob] object P refers to -** and writes those N bytes into buffer Z. -** -** {F17856} In [sqlite3_blob_read(P,Z,N,X)] if the size of the blob -** is less than N+X bytes, then the function returns [SQLITE_ERROR] -** and nothing is read from the blob. -** -** {F17859} In [sqlite3_blob_read(P,Z,N,X)] if X or N is less than zero -** then the function returns [SQLITE_ERROR] -** and nothing is read from the blob. -** -** {F17862} The [sqlite3_blob_read(P,Z,N,X)] interface returns [SQLITE_OK] -** if N bytes where successfully read into buffer Z. -** -** {F17865} If the requested read could not be completed, -** the [sqlite3_blob_read(P,Z,N,X)] interface returns an -** appropriate [error code] or [extended error code]. -** -** {F17868} If an error occurs during evaluation of [sqlite3_blob_read(P,...)] -** then subsequent calls to [sqlite3_errcode(D)], -** [sqlite3_errmsg(D)], and [sqlite3_errmsg16(D)] will return -** information approprate for that error, where D is the -** database handle that was used to open blob handle P. -*/ -SQLITE_API int sqlite3_blob_read(sqlite3_blob *, void *Z, int N, int iOffset); - -/* -** CAPI3REF: Write Data Into A BLOB Incrementally {F17870} -** -** This function is used to write data into an open -** [sqlite3_blob | blob-handle] from a user supplied buffer. -** n bytes of data are copied from the buffer -** pointed to by z into the open blob, starting at offset iOffset. -** -** If the [sqlite3_blob | blob-handle] passed as the first argument -** was not opened for writing (the flags parameter to [sqlite3_blob_open()] -*** was zero), this function returns [SQLITE_READONLY]. -** -** This function may only modify the contents of the blob; it is -** not possible to increase the size of a blob using this API. -** If offset iOffset is less than n bytes from the end of the blob, -** [SQLITE_ERROR] is returned and no data is written. If n is -** less than zero [SQLITE_ERROR] is returned and no data is written. -** -** On success, SQLITE_OK is returned. Otherwise, an -** [error code] or an [extended error code] is returned. -** -** INVARIANTS: -** -** {F17873} The [sqlite3_blob_write(P,Z,N,X)] interface writes N bytes -** from buffer Z into -** the blob that [sqlite3_blob] object P refers to -** beginning at an offset of X into the blob. -** -** {F17875} The [sqlite3_blob_write(P,Z,N,X)] interface returns -** [SQLITE_READONLY] if the [sqlite3_blob] object P was -** [sqlite3_blob_open | opened] for reading only. -** -** {F17876} In [sqlite3_blob_write(P,Z,N,X)] if the size of the blob -** is less than N+X bytes, then the function returns [SQLITE_ERROR] -** and nothing is written into the blob. -** -** {F17879} In [sqlite3_blob_write(P,Z,N,X)] if X or N is less than zero -** then the function returns [SQLITE_ERROR] -** and nothing is written into the blob. -** -** {F17882} The [sqlite3_blob_write(P,Z,N,X)] interface returns [SQLITE_OK] -** if N bytes where successfully written into blob. -** -** {F17885} If the requested write could not be completed, -** the [sqlite3_blob_write(P,Z,N,X)] interface returns an -** appropriate [error code] or [extended error code]. -** -** {F17888} If an error occurs during evaluation of [sqlite3_blob_write(D,...)] -** then subsequent calls to [sqlite3_errcode(D)], -** [sqlite3_errmsg(D)], and [sqlite3_errmsg16(D)] will return -** information approprate for that error. -*/ -SQLITE_API int sqlite3_blob_write(sqlite3_blob *, const void *z, int n, int iOffset); - -/* -** CAPI3REF: Virtual File System Objects {F11200} -** -** A virtual filesystem (VFS) is an [sqlite3_vfs] object -** that SQLite uses to interact -** with the underlying operating system. Most SQLite builds come with a -** single default VFS that is appropriate for the host computer. -** New VFSes can be registered and existing VFSes can be unregistered. -** The following interfaces are provided. -** -** The sqlite3_vfs_find() interface returns a pointer to -** a VFS given its name. Names are case sensitive. -** Names are zero-terminated UTF-8 strings. -** If there is no match, a NULL -** pointer is returned. If zVfsName is NULL then the default -** VFS is returned. -** -** New VFSes are registered with sqlite3_vfs_register(). -** Each new VFS becomes the default VFS if the makeDflt flag is set. -** The same VFS can be registered multiple times without injury. -** To make an existing VFS into the default VFS, register it again -** with the makeDflt flag set. If two different VFSes with the -** same name are registered, the behavior is undefined. If a -** VFS is registered with a name that is NULL or an empty string, -** then the behavior is undefined. -** -** Unregister a VFS with the sqlite3_vfs_unregister() interface. -** If the default VFS is unregistered, another VFS is chosen as -** the default. The choice for the new VFS is arbitrary. -** -** INVARIANTS: -** -** {F11203} The [sqlite3_vfs_find(N)] interface returns a pointer to the -** registered [sqlite3_vfs] object whose name exactly matches -** the zero-terminated UTF-8 string N, or it returns NULL if -** there is no match. -** -** {F11206} If the N parameter to [sqlite3_vfs_find(N)] is NULL then -** the function returns a pointer to the default [sqlite3_vfs] -** object if there is one, or NULL if there is no default -** [sqlite3_vfs] object. -** -** {F11209} The [sqlite3_vfs_register(P,F)] interface registers the -** well-formed [sqlite3_vfs] object P using the name given -** by the zName field of the object. -** -** {F11212} Using the [sqlite3_vfs_register(P,F)] interface to register -** the same [sqlite3_vfs] object multiple times is a harmless no-op. -** -** {F11215} The [sqlite3_vfs_register(P,F)] interface makes the -** the [sqlite3_vfs] object P the default [sqlite3_vfs] object -** if F is non-zero. -** -** {F11218} The [sqlite3_vfs_unregister(P)] interface unregisters the -** [sqlite3_vfs] object P so that it is no longer returned by -** subsequent calls to [sqlite3_vfs_find()]. -*/ -SQLITE_API sqlite3_vfs *sqlite3_vfs_find(const char *zVfsName); -SQLITE_API int sqlite3_vfs_register(sqlite3_vfs*, int makeDflt); -SQLITE_API int sqlite3_vfs_unregister(sqlite3_vfs*); - -/* -** CAPI3REF: Mutexes {F17000} -** -** The SQLite core uses these routines for thread -** synchronization. Though they are intended for internal -** use by SQLite, code that links against SQLite is -** permitted to use any of these routines. -** -** The SQLite source code contains multiple implementations -** of these mutex routines. An appropriate implementation -** is selected automatically at compile-time. The following -** implementations are available in the SQLite core: -** -**
    -**
  • SQLITE_MUTEX_OS2 -**
  • SQLITE_MUTEX_PTHREAD -**
  • SQLITE_MUTEX_W32 -**
  • SQLITE_MUTEX_NOOP -**
-** -** The SQLITE_MUTEX_NOOP implementation is a set of routines -** that does no real locking and is appropriate for use in -** a single-threaded application. The SQLITE_MUTEX_OS2, -** SQLITE_MUTEX_PTHREAD, and SQLITE_MUTEX_W32 implementations -** are appropriate for use on os/2, unix, and windows. -** -** If SQLite is compiled with the SQLITE_MUTEX_APPDEF preprocessor -** macro defined (with "-DSQLITE_MUTEX_APPDEF=1"), then no mutex -** implementation is included with the library. The -** mutex interface routines defined here become external -** references in the SQLite library for which implementations -** must be provided by the application. This facility allows an -** application that links against SQLite to provide its own mutex -** implementation without having to modify the SQLite core. -** -** {F17011} The sqlite3_mutex_alloc() routine allocates a new -** mutex and returns a pointer to it. {F17012} If it returns NULL -** that means that a mutex could not be allocated. {F17013} SQLite -** will unwind its stack and return an error. {F17014} The argument -** to sqlite3_mutex_alloc() is one of these integer constants: -** -**
    -**
  • SQLITE_MUTEX_FAST -**
  • SQLITE_MUTEX_RECURSIVE -**
  • SQLITE_MUTEX_STATIC_MASTER -**
  • SQLITE_MUTEX_STATIC_MEM -**
  • SQLITE_MUTEX_STATIC_MEM2 -**
  • SQLITE_MUTEX_STATIC_PRNG -**
  • SQLITE_MUTEX_STATIC_LRU -**
  • SQLITE_MUTEX_STATIC_LRU2 -**
{END} -** -** {F17015} The first two constants cause sqlite3_mutex_alloc() to create -** a new mutex. The new mutex is recursive when SQLITE_MUTEX_RECURSIVE -** is used but not necessarily so when SQLITE_MUTEX_FAST is used. {END} -** The mutex implementation does not need to make a distinction -** between SQLITE_MUTEX_RECURSIVE and SQLITE_MUTEX_FAST if it does -** not want to. {F17016} But SQLite will only request a recursive mutex in -** cases where it really needs one. {END} If a faster non-recursive mutex -** implementation is available on the host platform, the mutex subsystem -** might return such a mutex in response to SQLITE_MUTEX_FAST. -** -** {F17017} The other allowed parameters to sqlite3_mutex_alloc() each return -** a pointer to a static preexisting mutex. {END} Four static mutexes are -** used by the current version of SQLite. Future versions of SQLite -** may add additional static mutexes. Static mutexes are for internal -** use by SQLite only. Applications that use SQLite mutexes should -** use only the dynamic mutexes returned by SQLITE_MUTEX_FAST or -** SQLITE_MUTEX_RECURSIVE. -** -** {F17018} Note that if one of the dynamic mutex parameters (SQLITE_MUTEX_FAST -** or SQLITE_MUTEX_RECURSIVE) is used then sqlite3_mutex_alloc() -** returns a different mutex on every call. {F17034} But for the static -** mutex types, the same mutex is returned on every call that has -** the same type number. {END} -** -** {F17019} The sqlite3_mutex_free() routine deallocates a previously -** allocated dynamic mutex. {F17020} SQLite is careful to deallocate every -** dynamic mutex that it allocates. {U17021} The dynamic mutexes must not be in -** use when they are deallocated. {U17022} Attempting to deallocate a static -** mutex results in undefined behavior. {F17023} SQLite never deallocates -** a static mutex. {END} -** -** The sqlite3_mutex_enter() and sqlite3_mutex_try() routines attempt -** to enter a mutex. {F17024} If another thread is already within the mutex, -** sqlite3_mutex_enter() will block and sqlite3_mutex_try() will return -** SQLITE_BUSY. {F17025} The sqlite3_mutex_try() interface returns SQLITE_OK -** upon successful entry. {F17026} Mutexes created using -** SQLITE_MUTEX_RECURSIVE can be entered multiple times by the same thread. -** {F17027} In such cases the, -** mutex must be exited an equal number of times before another thread -** can enter. {U17028} If the same thread tries to enter any other -** kind of mutex more than once, the behavior is undefined. -** {F17029} SQLite will never exhibit -** such behavior in its own use of mutexes. {END} -** -** Some systems (ex: windows95) do not the operation implemented by -** sqlite3_mutex_try(). On those systems, sqlite3_mutex_try() will -** always return SQLITE_BUSY. {F17030} The SQLite core only ever uses -** sqlite3_mutex_try() as an optimization so this is acceptable behavior. {END} -** -** {F17031} The sqlite3_mutex_leave() routine exits a mutex that was -** previously entered by the same thread. {U17032} The behavior -** is undefined if the mutex is not currently entered by the -** calling thread or is not currently allocated. {F17033} SQLite will -** never do either. {END} -** -** See also: [sqlite3_mutex_held()] and [sqlite3_mutex_notheld()]. -*/ -SQLITE_API sqlite3_mutex *sqlite3_mutex_alloc(int); -SQLITE_API void sqlite3_mutex_free(sqlite3_mutex*); -SQLITE_API void sqlite3_mutex_enter(sqlite3_mutex*); -SQLITE_API int sqlite3_mutex_try(sqlite3_mutex*); -SQLITE_API void sqlite3_mutex_leave(sqlite3_mutex*); - -/* -** CAPI3REF: Mutex Verifcation Routines {F17080} -** -** The sqlite3_mutex_held() and sqlite3_mutex_notheld() routines -** are intended for use inside assert() statements. {F17081} The SQLite core -** never uses these routines except inside an assert() and applications -** are advised to follow the lead of the core. {F17082} The core only -** provides implementations for these routines when it is compiled -** with the SQLITE_DEBUG flag. {U17087} External mutex implementations -** are only required to provide these routines if SQLITE_DEBUG is -** defined and if NDEBUG is not defined. -** -** {F17083} These routines should return true if the mutex in their argument -** is held or not held, respectively, by the calling thread. {END} -** -** {X17084} The implementation is not required to provided versions of these -** routines that actually work. -** If the implementation does not provide working -** versions of these routines, it should at least provide stubs -** that always return true so that one does not get spurious -** assertion failures. {END} -** -** {F17085} If the argument to sqlite3_mutex_held() is a NULL pointer then -** the routine should return 1. {END} This seems counter-intuitive since -** clearly the mutex cannot be held if it does not exist. But the -** the reason the mutex does not exist is because the build is not -** using mutexes. And we do not want the assert() containing the -** call to sqlite3_mutex_held() to fail, so a non-zero return is -** the appropriate thing to do. {F17086} The sqlite3_mutex_notheld() -** interface should also return 1 when given a NULL pointer. -*/ -SQLITE_API int sqlite3_mutex_held(sqlite3_mutex*); -SQLITE_API int sqlite3_mutex_notheld(sqlite3_mutex*); - -/* -** CAPI3REF: Mutex Types {F17001} -** -** {F17002} The [sqlite3_mutex_alloc()] interface takes a single argument -** which is one of these integer constants. {END} -*/ -#define SQLITE_MUTEX_FAST 0 -#define SQLITE_MUTEX_RECURSIVE 1 -#define SQLITE_MUTEX_STATIC_MASTER 2 -#define SQLITE_MUTEX_STATIC_MEM 3 /* sqlite3_malloc() */ -#define SQLITE_MUTEX_STATIC_MEM2 4 /* sqlite3_release_memory() */ -#define SQLITE_MUTEX_STATIC_PRNG 5 /* sqlite3_random() */ -#define SQLITE_MUTEX_STATIC_LRU 6 /* lru page list */ -#define SQLITE_MUTEX_STATIC_LRU2 7 /* lru page list */ - -/* -** CAPI3REF: Low-Level Control Of Database Files {F11300} -** -** {F11301} The [sqlite3_file_control()] interface makes a direct call to the -** xFileControl method for the [sqlite3_io_methods] object associated -** with a particular database identified by the second argument. {F11302} The -** name of the database is the name assigned to the database by the -** ATTACH SQL command that opened the -** database. {F11303} To control the main database file, use the name "main" -** or a NULL pointer. {F11304} The third and fourth parameters to this routine -** are passed directly through to the second and third parameters of -** the xFileControl method. {F11305} The return value of the xFileControl -** method becomes the return value of this routine. -** -** {F11306} If the second parameter (zDbName) does not match the name of any -** open database file, then SQLITE_ERROR is returned. {F11307} This error -** code is not remembered and will not be recalled by [sqlite3_errcode()] -** or [sqlite3_errmsg()]. {U11308} The underlying xFileControl method might -** also return SQLITE_ERROR. {U11309} There is no way to distinguish between -** an incorrect zDbName and an SQLITE_ERROR return from the underlying -** xFileControl method. {END} -** -** See also: [SQLITE_FCNTL_LOCKSTATE] -*/ -SQLITE_API int sqlite3_file_control(sqlite3*, const char *zDbName, int op, void*); - -/* -** CAPI3REF: Testing Interface {F11400} -** -** The sqlite3_test_control() interface is used to read out internal -** state of SQLite and to inject faults into SQLite for testing -** purposes. The first parameter a operation code that determines -** the number, meaning, and operation of all subsequent parameters. -** -** This interface is not for use by applications. It exists solely -** for verifying the correct operation of the SQLite library. Depending -** on how the SQLite library is compiled, this interface might not exist. -** -** The details of the operation codes, their meanings, the parameters -** they take, and what they do are all subject to change without notice. -** Unlike most of the SQLite API, this function is not guaranteed to -** operate consistently from one release to the next. -*/ -SQLITE_API int sqlite3_test_control(int op, ...); - -/* -** CAPI3REF: Testing Interface Operation Codes {F11410} -** -** These constants are the valid operation code parameters used -** as the first argument to [sqlite3_test_control()]. -** -** These parameters and their meansing are subject to change -** without notice. These values are for testing purposes only. -** Applications should not use any of these parameters or the -** [sqlite3_test_control()] interface. -*/ -#define SQLITE_TESTCTRL_FAULT_CONFIG 1 -#define SQLITE_TESTCTRL_FAULT_FAILURES 2 -#define SQLITE_TESTCTRL_FAULT_BENIGN_FAILURES 3 -#define SQLITE_TESTCTRL_FAULT_PENDING 4 -#define SQLITE_TESTCTRL_PRNG_SAVE 5 -#define SQLITE_TESTCTRL_PRNG_RESTORE 6 -#define SQLITE_TESTCTRL_PRNG_RESET 7 -#define SQLITE_TESTCTRL_BITVEC_TEST 8 - - -/* -** Undo the hack that converts floating point types to integer for -** builds on processors without floating point support. -*/ -#ifdef SQLITE_OMIT_FLOATING_POINT -# undef double -#endif - -#if 0 -} /* End of the 'extern "C"' block */ -#endif -#endif - -/************** End of sqlite3.h *********************************************/ -/************** Continuing where we left off in sqliteInt.h ******************/ -/************** Include hash.h in the middle of sqliteInt.h ******************/ -/************** Begin file hash.h ********************************************/ -/* -** 2001 September 22 -** -** The author disclaims copyright to this source code. In place of -** a legal notice, here is a blessing: -** -** May you do good and not evil. -** May you find forgiveness for yourself and forgive others. -** May you share freely, never taking more than you give. -** -************************************************************************* -** This is the header file for the generic hash-table implemenation -** used in SQLite. -** -** $Id: hash.h,v 1.11 2007/09/04 14:31:47 danielk1977 Exp $ -*/ -#ifndef _SQLITE_HASH_H_ -#define _SQLITE_HASH_H_ - -/* Forward declarations of structures. */ -typedef struct Hash Hash; -typedef struct HashElem HashElem; - -/* A complete hash table is an instance of the following structure. -** The internals of this structure are intended to be opaque -- client -** code should not attempt to access or modify the fields of this structure -** directly. Change this structure only by using the routines below. -** However, many of the "procedures" and "functions" for modifying and -** accessing this structure are really macros, so we can't really make -** this structure opaque. -*/ -struct Hash { - char keyClass; /* SQLITE_HASH_INT, _POINTER, _STRING, _BINARY */ - char copyKey; /* True if copy of key made on insert */ - int count; /* Number of entries in this table */ - int htsize; /* Number of buckets in the hash table */ - HashElem *first; /* The first element of the array */ - struct _ht { /* the hash table */ - int count; /* Number of entries with this hash */ - HashElem *chain; /* Pointer to first entry with this hash */ - } *ht; -}; - -/* Each element in the hash table is an instance of the following -** structure. All elements are stored on a single doubly-linked list. -** -** Again, this structure is intended to be opaque, but it can't really -** be opaque because it is used by macros. -*/ -struct HashElem { - HashElem *next, *prev; /* Next and previous elements in the table */ - void *data; /* Data associated with this element */ - void *pKey; int nKey; /* Key associated with this element */ -}; - -/* -** There are 4 different modes of operation for a hash table: -** -** SQLITE_HASH_INT nKey is used as the key and pKey is ignored. -** -** SQLITE_HASH_POINTER pKey is used as the key and nKey is ignored. -** -** SQLITE_HASH_STRING pKey points to a string that is nKey bytes long -** (including the null-terminator, if any). Case -** is ignored in comparisons. -** -** SQLITE_HASH_BINARY pKey points to binary data nKey bytes long. -** memcmp() is used to compare keys. -** -** A copy of the key is made for SQLITE_HASH_STRING and SQLITE_HASH_BINARY -** if the copyKey parameter to HashInit is 1. -*/ -/* #define SQLITE_HASH_INT 1 // NOT USED */ -/* #define SQLITE_HASH_POINTER 2 // NOT USED */ -#define SQLITE_HASH_STRING 3 -#define SQLITE_HASH_BINARY 4 - -/* -** Access routines. To delete, insert a NULL pointer. -*/ -SQLITE_PRIVATE void sqlite3HashInit(Hash*, int keytype, int copyKey); -SQLITE_PRIVATE void *sqlite3HashInsert(Hash*, const void *pKey, int nKey, void *pData); -SQLITE_PRIVATE void *sqlite3HashFind(const Hash*, const void *pKey, int nKey); -SQLITE_PRIVATE HashElem *sqlite3HashFindElem(const Hash*, const void *pKey, int nKey); -SQLITE_PRIVATE void sqlite3HashClear(Hash*); - -/* -** Macros for looping over all elements of a hash table. The idiom is -** like this: -** -** Hash h; -** HashElem *p; -** ... -** for(p=sqliteHashFirst(&h); p; p=sqliteHashNext(p)){ -** SomeStructure *pData = sqliteHashData(p); -** // do something with pData -** } -*/ -#define sqliteHashFirst(H) ((H)->first) -#define sqliteHashNext(E) ((E)->next) -#define sqliteHashData(E) ((E)->data) -#define sqliteHashKey(E) ((E)->pKey) -#define sqliteHashKeysize(E) ((E)->nKey) - -/* -** Number of entries in a hash table -*/ -#define sqliteHashCount(H) ((H)->count) - -#endif /* _SQLITE_HASH_H_ */ - -/************** End of hash.h ************************************************/ -/************** Continuing where we left off in sqliteInt.h ******************/ -/************** Include parse.h in the middle of sqliteInt.h *****************/ -/************** Begin file parse.h *******************************************/ -#define TK_SEMI 1 -#define TK_EXPLAIN 2 -#define TK_QUERY 3 -#define TK_PLAN 4 -#define TK_BEGIN 5 -#define TK_TRANSACTION 6 -#define TK_DEFERRED 7 -#define TK_IMMEDIATE 8 -#define TK_EXCLUSIVE 9 -#define TK_COMMIT 10 -#define TK_END 11 -#define TK_ROLLBACK 12 -#define TK_CREATE 13 -#define TK_TABLE 14 -#define TK_IF 15 -#define TK_NOT 16 -#define TK_EXISTS 17 -#define TK_TEMP 18 -#define TK_LP 19 -#define TK_RP 20 -#define TK_AS 21 -#define TK_COMMA 22 -#define TK_ID 23 -#define TK_ABORT 24 -#define TK_AFTER 25 -#define TK_ANALYZE 26 -#define TK_ASC 27 -#define TK_ATTACH 28 -#define TK_BEFORE 29 -#define TK_CASCADE 30 -#define TK_CAST 31 -#define TK_CONFLICT 32 -#define TK_DATABASE 33 -#define TK_DESC 34 -#define TK_DETACH 35 -#define TK_EACH 36 -#define TK_FAIL 37 -#define TK_FOR 38 -#define TK_IGNORE 39 -#define TK_INITIALLY 40 -#define TK_INSTEAD 41 -#define TK_LIKE_KW 42 -#define TK_MATCH 43 -#define TK_KEY 44 -#define TK_OF 45 -#define TK_OFFSET 46 -#define TK_PRAGMA 47 -#define TK_RAISE 48 -#define TK_REPLACE 49 -#define TK_RESTRICT 50 -#define TK_ROW 51 -#define TK_TRIGGER 52 -#define TK_VACUUM 53 -#define TK_VIEW 54 -#define TK_VIRTUAL 55 -#define TK_REINDEX 56 -#define TK_RENAME 57 -#define TK_CTIME_KW 58 -#define TK_ANY 59 -#define TK_OR 60 -#define TK_AND 61 -#define TK_IS 62 -#define TK_BETWEEN 63 -#define TK_IN 64 -#define TK_ISNULL 65 -#define TK_NOTNULL 66 -#define TK_NE 67 -#define TK_EQ 68 -#define TK_GT 69 -#define TK_LE 70 -#define TK_LT 71 -#define TK_GE 72 -#define TK_ESCAPE 73 -#define TK_BITAND 74 -#define TK_BITOR 75 -#define TK_LSHIFT 76 -#define TK_RSHIFT 77 -#define TK_PLUS 78 -#define TK_MINUS 79 -#define TK_STAR 80 -#define TK_SLASH 81 -#define TK_REM 82 -#define TK_CONCAT 83 -#define TK_COLLATE 84 -#define TK_UMINUS 85 -#define TK_UPLUS 86 -#define TK_BITNOT 87 -#define TK_STRING 88 -#define TK_JOIN_KW 89 -#define TK_CONSTRAINT 90 -#define TK_DEFAULT 91 -#define TK_NULL 92 -#define TK_PRIMARY 93 -#define TK_UNIQUE 94 -#define TK_CHECK 95 -#define TK_REFERENCES 96 -#define TK_AUTOINCR 97 -#define TK_ON 98 -#define TK_DELETE 99 -#define TK_UPDATE 100 -#define TK_INSERT 101 -#define TK_SET 102 -#define TK_DEFERRABLE 103 -#define TK_FOREIGN 104 -#define TK_DROP 105 -#define TK_UNION 106 -#define TK_ALL 107 -#define TK_EXCEPT 108 -#define TK_INTERSECT 109 -#define TK_SELECT 110 -#define TK_DISTINCT 111 -#define TK_DOT 112 -#define TK_FROM 113 -#define TK_JOIN 114 -#define TK_USING 115 -#define TK_ORDER 116 -#define TK_BY 117 -#define TK_GROUP 118 -#define TK_HAVING 119 -#define TK_LIMIT 120 -#define TK_WHERE 121 -#define TK_INTO 122 -#define TK_VALUES 123 -#define TK_INTEGER 124 -#define TK_FLOAT 125 -#define TK_BLOB 126 -#define TK_REGISTER 127 -#define TK_VARIABLE 128 -#define TK_CASE 129 -#define TK_WHEN 130 -#define TK_THEN 131 -#define TK_ELSE 132 -#define TK_INDEX 133 -#define TK_ALTER 134 -#define TK_TO 135 -#define TK_ADD 136 -#define TK_COLUMNKW 137 -#define TK_TO_TEXT 138 -#define TK_TO_BLOB 139 -#define TK_TO_NUMERIC 140 -#define TK_TO_INT 141 -#define TK_TO_REAL 142 -#define TK_END_OF_FILE 143 -#define TK_ILLEGAL 144 -#define TK_SPACE 145 -#define TK_UNCLOSED_STRING 146 -#define TK_COMMENT 147 -#define TK_FUNCTION 148 -#define TK_COLUMN 149 -#define TK_AGG_FUNCTION 150 -#define TK_AGG_COLUMN 151 -#define TK_CONST_FUNC 152 - -/************** End of parse.h ***********************************************/ -/************** Continuing where we left off in sqliteInt.h ******************/ -#include -#include -#include -#include -#include - -/* -** If compiling for a processor that lacks floating point support, -** substitute integer for floating-point -*/ -#ifdef SQLITE_OMIT_FLOATING_POINT -# define double sqlite_int64 -# define LONGDOUBLE_TYPE sqlite_int64 -# ifndef SQLITE_BIG_DBL -# define SQLITE_BIG_DBL (0x7fffffffffffffff) -# endif -# define SQLITE_OMIT_DATETIME_FUNCS 1 -# define SQLITE_OMIT_TRACE 1 -# undef SQLITE_MIXED_ENDIAN_64BIT_FLOAT -#endif -#ifndef SQLITE_BIG_DBL -# define SQLITE_BIG_DBL (1e99) -#endif - -/* -** OMIT_TEMPDB is set to 1 if SQLITE_OMIT_TEMPDB is defined, or 0 -** afterward. Having this macro allows us to cause the C compiler -** to omit code used by TEMP tables without messy #ifndef statements. -*/ -#ifdef SQLITE_OMIT_TEMPDB -#define OMIT_TEMPDB 1 -#else -#define OMIT_TEMPDB 0 -#endif - -/* -** If the following macro is set to 1, then NULL values are considered -** distinct when determining whether or not two entries are the same -** in a UNIQUE index. This is the way PostgreSQL, Oracle, DB2, MySQL, -** OCELOT, and Firebird all work. The SQL92 spec explicitly says this -** is the way things are suppose to work. -** -** If the following macro is set to 0, the NULLs are indistinct for -** a UNIQUE index. In this mode, you can only have a single NULL entry -** for a column declared UNIQUE. This is the way Informix and SQL Server -** work. -*/ -#define NULL_DISTINCT_FOR_UNIQUE 1 - -/* -** The "file format" number is an integer that is incremented whenever -** the VDBE-level file format changes. The following macros define the -** the default file format for new databases and the maximum file format -** that the library can read. -*/ -#define SQLITE_MAX_FILE_FORMAT 4 -#ifndef SQLITE_DEFAULT_FILE_FORMAT -# define SQLITE_DEFAULT_FILE_FORMAT 1 -#endif - -/* -** Provide a default value for TEMP_STORE in case it is not specified -** on the command-line -*/ -#ifndef TEMP_STORE -# define TEMP_STORE 1 -#endif - -/* -** GCC does not define the offsetof() macro so we'll have to do it -** ourselves. -*/ -#ifndef offsetof -#define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD)) -#endif - -/* -** Check to see if this machine uses EBCDIC. (Yes, believe it or -** not, there are still machines out there that use EBCDIC.) -*/ -#if 'A' == '\301' -# define SQLITE_EBCDIC 1 -#else -# define SQLITE_ASCII 1 -#endif - -/* -** Integers of known sizes. These typedefs might change for architectures -** where the sizes very. Preprocessor macros are available so that the -** types can be conveniently redefined at compile-type. Like this: -** -** cc '-DUINTPTR_TYPE=long long int' ... -*/ -#ifndef UINT32_TYPE -# ifdef HAVE_UINT32_T -# define UINT32_TYPE uint32_t -# else -# define UINT32_TYPE unsigned int -# endif -#endif -#ifndef UINT16_TYPE -# ifdef HAVE_UINT16_T -# define UINT16_TYPE uint16_t -# else -# define UINT16_TYPE unsigned short int -# endif -#endif -#ifndef INT16_TYPE -# ifdef HAVE_INT16_T -# define INT16_TYPE int16_t -# else -# define INT16_TYPE short int -# endif -#endif -#ifndef UINT8_TYPE -# ifdef HAVE_UINT8_T -# define UINT8_TYPE uint8_t -# else -# define UINT8_TYPE unsigned char -# endif -#endif -#ifndef INT8_TYPE -# ifdef HAVE_INT8_T -# define INT8_TYPE int8_t -# else -# define INT8_TYPE signed char -# endif -#endif -#ifndef LONGDOUBLE_TYPE -# define LONGDOUBLE_TYPE long double -#endif -typedef sqlite_int64 i64; /* 8-byte signed integer */ -typedef sqlite_uint64 u64; /* 8-byte unsigned integer */ -typedef UINT32_TYPE u32; /* 4-byte unsigned integer */ -typedef UINT16_TYPE u16; /* 2-byte unsigned integer */ -typedef INT16_TYPE i16; /* 2-byte signed integer */ -typedef UINT8_TYPE u8; /* 1-byte unsigned integer */ -typedef UINT8_TYPE i8; /* 1-byte signed integer */ - -/* -** Macros to determine whether the machine is big or little endian, -** evaluated at runtime. -*/ -#ifdef SQLITE_AMALGAMATION -SQLITE_PRIVATE const int sqlite3one; -#else -SQLITE_PRIVATE const int sqlite3one; -#endif -#if defined(i386) || defined(__i386__) || defined(_M_IX86) -# define SQLITE_BIGENDIAN 0 -# define SQLITE_LITTLEENDIAN 1 -# define SQLITE_UTF16NATIVE SQLITE_UTF16LE -#else -# define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0) -# define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1) -# define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE) -#endif - -/* -** Constants for the largest and smallest possible 64-bit signed integers. -** These macros are designed to work correctly on both 32-bit and 64-bit -** compilers. -*/ -#define LARGEST_INT64 (0xffffffff|(((i64)0x7fffffff)<<32)) -#define SMALLEST_INT64 (((i64)-1) - LARGEST_INT64) - -/* -** An instance of the following structure is used to store the busy-handler -** callback for a given sqlite handle. -** -** The sqlite.busyHandler member of the sqlite struct contains the busy -** callback for the database handle. Each pager opened via the sqlite -** handle is passed a pointer to sqlite.busyHandler. The busy-handler -** callback is currently invoked only from within pager.c. -*/ -typedef struct BusyHandler BusyHandler; -struct BusyHandler { - int (*xFunc)(void *,int); /* The busy callback */ - void *pArg; /* First arg to busy callback */ - int nBusy; /* Incremented with each busy call */ -}; - -/* -** Name of the master database table. The master database table -** is a special table that holds the names and attributes of all -** user tables and indices. -*/ -#define MASTER_NAME "sqlite_master" -#define TEMP_MASTER_NAME "sqlite_temp_master" - -/* -** The root-page of the master database table. -*/ -#define MASTER_ROOT 1 - -/* -** The name of the schema table. -*/ -#define SCHEMA_TABLE(x) ((!OMIT_TEMPDB)&&(x==1)?TEMP_MASTER_NAME:MASTER_NAME) - -/* -** A convenience macro that returns the number of elements in -** an array. -*/ -#define ArraySize(X) (sizeof(X)/sizeof(X[0])) - -/* -** Forward references to structures -*/ -typedef struct AggInfo AggInfo; -typedef struct AuthContext AuthContext; -typedef struct Bitvec Bitvec; -typedef struct CollSeq CollSeq; -typedef struct Column Column; -typedef struct Db Db; -typedef struct Schema Schema; -typedef struct Expr Expr; -typedef struct ExprList ExprList; -typedef struct FKey FKey; -typedef struct FuncDef FuncDef; -typedef struct IdList IdList; -typedef struct Index Index; -typedef struct KeyClass KeyClass; -typedef struct KeyInfo KeyInfo; -typedef struct Module Module; -typedef struct NameContext NameContext; -typedef struct Parse Parse; -typedef struct Select Select; -typedef struct SrcList SrcList; -typedef struct StrAccum StrAccum; -typedef struct Table Table; -typedef struct TableLock TableLock; -typedef struct Token Token; -typedef struct TriggerStack TriggerStack; -typedef struct TriggerStep TriggerStep; -typedef struct Trigger Trigger; -typedef struct WhereInfo WhereInfo; -typedef struct WhereLevel WhereLevel; - -/* -** Defer sourcing vdbe.h and btree.h until after the "u8" and -** "BusyHandler" typedefs. vdbe.h also requires a few of the opaque -** pointer types (i.e. FuncDef) defined above. -*/ -/************** Include btree.h in the middle of sqliteInt.h *****************/ -/************** Begin file btree.h *******************************************/ -/* -** 2001 September 15 -** -** The author disclaims copyright to this source code. In place of -** a legal notice, here is a blessing: -** -** May you do good and not evil. -** May you find forgiveness for yourself and forgive others. -** May you share freely, never taking more than you give. -** -************************************************************************* -** This header file defines the interface that the sqlite B-Tree file -** subsystem. See comments in the source code for a detailed description -** of what each interface routine does. -** -** @(#) $Id: btree.h,v 1.98 2008/04/26 13:39:47 drh Exp $ -*/ -#ifndef _BTREE_H_ -#define _BTREE_H_ - -/* TODO: This definition is just included so other modules compile. It -** needs to be revisited. -*/ -#define SQLITE_N_BTREE_META 10 - -/* -** If defined as non-zero, auto-vacuum is enabled by default. Otherwise -** it must be turned on for each database using "PRAGMA auto_vacuum = 1". -*/ -#ifndef SQLITE_DEFAULT_AUTOVACUUM - #define SQLITE_DEFAULT_AUTOVACUUM 0 -#endif - -#define BTREE_AUTOVACUUM_NONE 0 /* Do not do auto-vacuum */ -#define BTREE_AUTOVACUUM_FULL 1 /* Do full auto-vacuum */ -#define BTREE_AUTOVACUUM_INCR 2 /* Incremental vacuum */ - -/* -** Forward declarations of structure -*/ -typedef struct Btree Btree; -typedef struct BtCursor BtCursor; -typedef struct BtShared BtShared; -typedef struct BtreeMutexArray BtreeMutexArray; - -/* -** This structure records all of the Btrees that need to hold -** a mutex before we enter sqlite3VdbeExec(). The Btrees are -** are placed in aBtree[] in order of aBtree[]->pBt. That way, -** we can always lock and unlock them all quickly. -*/ -struct BtreeMutexArray { - int nMutex; - Btree *aBtree[SQLITE_MAX_ATTACHED+1]; -}; - - -SQLITE_PRIVATE int sqlite3BtreeOpen( - const char *zFilename, /* Name of database file to open */ - sqlite3 *db, /* Associated database connection */ - Btree **, /* Return open Btree* here */ - int flags, /* Flags */ - int vfsFlags /* Flags passed through to VFS open */ -); - -/* The flags parameter to sqlite3BtreeOpen can be the bitwise or of the -** following values. -** -** NOTE: These values must match the corresponding PAGER_ values in -** pager.h. -*/ -#define BTREE_OMIT_JOURNAL 1 /* Do not use journal. No argument */ -#define BTREE_NO_READLOCK 2 /* Omit readlocks on readonly files */ -#define BTREE_MEMORY 4 /* In-memory DB. No argument */ -#define BTREE_READONLY 8 /* Open the database in read-only mode */ -#define BTREE_READWRITE 16 /* Open for both reading and writing */ -#define BTREE_CREATE 32 /* Create the database if it does not exist */ - -/* Additional values for the 4th argument of sqlite3BtreeOpen that -** are not associated with PAGER_ values. -*/ -#define BTREE_PRIVATE 64 /* Never share with other connections */ - -SQLITE_PRIVATE int sqlite3BtreeClose(Btree*); -SQLITE_PRIVATE int sqlite3BtreeSetCacheSize(Btree*,int); -SQLITE_PRIVATE int sqlite3BtreeSetSafetyLevel(Btree*,int,int); -SQLITE_PRIVATE int sqlite3BtreeSyncDisabled(Btree*); -SQLITE_PRIVATE int sqlite3BtreeSetPageSize(Btree*,int,int); -SQLITE_PRIVATE int sqlite3BtreeGetPageSize(Btree*); -SQLITE_PRIVATE int sqlite3BtreeMaxPageCount(Btree*,int); -SQLITE_PRIVATE int sqlite3BtreeGetReserve(Btree*); -SQLITE_PRIVATE int sqlite3BtreeSetAutoVacuum(Btree *, int); -SQLITE_PRIVATE int sqlite3BtreeGetAutoVacuum(Btree *); -SQLITE_PRIVATE int sqlite3BtreeBeginTrans(Btree*,int); -SQLITE_PRIVATE int sqlite3BtreeCommitPhaseOne(Btree*, const char *zMaster); -SQLITE_PRIVATE int sqlite3BtreeCommitPhaseTwo(Btree*); -SQLITE_PRIVATE int sqlite3BtreeCommit(Btree*); -SQLITE_PRIVATE int sqlite3BtreeRollback(Btree*); -SQLITE_PRIVATE int sqlite3BtreeBeginStmt(Btree*); -SQLITE_PRIVATE int sqlite3BtreeCommitStmt(Btree*); -SQLITE_PRIVATE int sqlite3BtreeRollbackStmt(Btree*); -SQLITE_PRIVATE int sqlite3BtreeCreateTable(Btree*, int*, int flags); -SQLITE_PRIVATE int sqlite3BtreeIsInTrans(Btree*); -SQLITE_PRIVATE int sqlite3BtreeIsInStmt(Btree*); -SQLITE_PRIVATE int sqlite3BtreeIsInReadTrans(Btree*); -SQLITE_PRIVATE void *sqlite3BtreeSchema(Btree *, int, void(*)(void *)); -SQLITE_PRIVATE int sqlite3BtreeSchemaLocked(Btree *); -SQLITE_PRIVATE int sqlite3BtreeLockTable(Btree *, int, u8); - -SQLITE_PRIVATE const char *sqlite3BtreeGetFilename(Btree *); -SQLITE_PRIVATE const char *sqlite3BtreeGetDirname(Btree *); -SQLITE_PRIVATE const char *sqlite3BtreeGetJournalname(Btree *); -SQLITE_PRIVATE int sqlite3BtreeCopyFile(Btree *, Btree *); - -SQLITE_PRIVATE int sqlite3BtreeIncrVacuum(Btree *); - -/* The flags parameter to sqlite3BtreeCreateTable can be the bitwise OR -** of the following flags: -*/ -#define BTREE_INTKEY 1 /* Table has only 64-bit signed integer keys */ -#define BTREE_ZERODATA 2 /* Table has keys only - no data */ -#define BTREE_LEAFDATA 4 /* Data stored in leaves only. Implies INTKEY */ - -SQLITE_PRIVATE int sqlite3BtreeDropTable(Btree*, int, int*); -SQLITE_PRIVATE int sqlite3BtreeClearTable(Btree*, int); -SQLITE_PRIVATE int sqlite3BtreeGetMeta(Btree*, int idx, u32 *pValue); -SQLITE_PRIVATE int sqlite3BtreeUpdateMeta(Btree*, int idx, u32 value); -SQLITE_PRIVATE void sqlite3BtreeTripAllCursors(Btree*, int); - -struct UnpackedRecord; /* Forward declaration. Definition in vdbeaux.c. */ - -SQLITE_PRIVATE int sqlite3BtreeCursor( - Btree*, /* BTree containing table to open */ - int iTable, /* Index of root page */ - int wrFlag, /* 1 for writing. 0 for read-only */ - struct KeyInfo*, /* First argument to compare function */ - BtCursor *pCursor /* Space to write cursor structure */ -); -SQLITE_PRIVATE int sqlite3BtreeCursorSize(void); - -SQLITE_PRIVATE int sqlite3BtreeCloseCursor(BtCursor*); -SQLITE_PRIVATE int sqlite3BtreeMoveto( - BtCursor*, - const void *pKey, - struct UnpackedRecord *pUnKey, - i64 nKey, - int bias, - int *pRes -); -SQLITE_PRIVATE int sqlite3BtreeDelete(BtCursor*); -SQLITE_PRIVATE int sqlite3BtreeInsert(BtCursor*, const void *pKey, i64 nKey, - const void *pData, int nData, - int nZero, int bias); -SQLITE_PRIVATE int sqlite3BtreeFirst(BtCursor*, int *pRes); -SQLITE_PRIVATE int sqlite3BtreeLast(BtCursor*, int *pRes); -SQLITE_PRIVATE int sqlite3BtreeNext(BtCursor*, int *pRes); -SQLITE_PRIVATE int sqlite3BtreeEof(BtCursor*); -SQLITE_PRIVATE int sqlite3BtreeFlags(BtCursor*); -SQLITE_PRIVATE int sqlite3BtreePrevious(BtCursor*, int *pRes); -SQLITE_PRIVATE int sqlite3BtreeKeySize(BtCursor*, i64 *pSize); -SQLITE_PRIVATE int sqlite3BtreeKey(BtCursor*, u32 offset, u32 amt, void*); -SQLITE_PRIVATE sqlite3 *sqlite3BtreeCursorDb(const BtCursor*); -SQLITE_PRIVATE const void *sqlite3BtreeKeyFetch(BtCursor*, int *pAmt); -SQLITE_PRIVATE const void *sqlite3BtreeDataFetch(BtCursor*, int *pAmt); -SQLITE_PRIVATE int sqlite3BtreeDataSize(BtCursor*, u32 *pSize); -SQLITE_PRIVATE int sqlite3BtreeData(BtCursor*, u32 offset, u32 amt, void*); - -SQLITE_PRIVATE char *sqlite3BtreeIntegrityCheck(Btree*, int *aRoot, int nRoot, int, int*); -SQLITE_PRIVATE struct Pager *sqlite3BtreePager(Btree*); - -SQLITE_PRIVATE int sqlite3BtreePutData(BtCursor*, u32 offset, u32 amt, void*); -SQLITE_PRIVATE void sqlite3BtreeCacheOverflow(BtCursor *); - -#ifdef SQLITE_TEST -SQLITE_PRIVATE int sqlite3BtreeCursorInfo(BtCursor*, int*, int); -SQLITE_PRIVATE void sqlite3BtreeCursorList(Btree*); -SQLITE_PRIVATE int sqlite3BtreePageDump(Btree*, int, int recursive); -#endif - -/* -** If we are not using shared cache, then there is no need to -** use mutexes to access the BtShared structures. So make the -** Enter and Leave procedures no-ops. -*/ -#if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE -SQLITE_PRIVATE void sqlite3BtreeEnter(Btree*); -SQLITE_PRIVATE void sqlite3BtreeLeave(Btree*); -SQLITE_PRIVATE int sqlite3BtreeHoldsMutex(Btree*); -SQLITE_PRIVATE void sqlite3BtreeEnterCursor(BtCursor*); -SQLITE_PRIVATE void sqlite3BtreeLeaveCursor(BtCursor*); -SQLITE_PRIVATE void sqlite3BtreeEnterAll(sqlite3*); -SQLITE_PRIVATE void sqlite3BtreeLeaveAll(sqlite3*); -SQLITE_PRIVATE int sqlite3BtreeHoldsAllMutexes(sqlite3*); -SQLITE_PRIVATE void sqlite3BtreeMutexArrayEnter(BtreeMutexArray*); -SQLITE_PRIVATE void sqlite3BtreeMutexArrayLeave(BtreeMutexArray*); -SQLITE_PRIVATE void sqlite3BtreeMutexArrayInsert(BtreeMutexArray*, Btree*); -#else -# define sqlite3BtreeEnter(X) -# define sqlite3BtreeLeave(X) -# define sqlite3BtreeHoldsMutex(X) 1 -# define sqlite3BtreeEnterCursor(X) -# define sqlite3BtreeLeaveCursor(X) -# define sqlite3BtreeEnterAll(X) -# define sqlite3BtreeLeaveAll(X) -# define sqlite3BtreeHoldsAllMutexes(X) 1 -# define sqlite3BtreeMutexArrayEnter(X) -# define sqlite3BtreeMutexArrayLeave(X) -# define sqlite3BtreeMutexArrayInsert(X,Y) -#endif - - -#endif /* _BTREE_H_ */ - -/************** End of btree.h ***********************************************/ -/************** Continuing where we left off in sqliteInt.h ******************/ -/************** Include vdbe.h in the middle of sqliteInt.h ******************/ -/************** Begin file vdbe.h ********************************************/ -/* -** 2001 September 15 -** -** The author disclaims copyright to this source code. In place of -** a legal notice, here is a blessing: -** -** May you do good and not evil. -** May you find forgiveness for yourself and forgive others. -** May you share freely, never taking more than you give. -** -************************************************************************* -** Header file for the Virtual DataBase Engine (VDBE) -** -** This header defines the interface to the virtual database engine -** or VDBE. The VDBE implements an abstract machine that runs a -** simple program to access and modify the underlying database. -** -** $Id: vdbe.h,v 1.131 2008/05/01 17:03:49 drh Exp $ -*/ -#ifndef _SQLITE_VDBE_H_ -#define _SQLITE_VDBE_H_ - -/* -** A single VDBE is an opaque structure named "Vdbe". Only routines -** in the source file sqliteVdbe.c are allowed to see the insides -** of this structure. -*/ -typedef struct Vdbe Vdbe; - -/* -** The names of the following types declared in vdbeInt.h are required -** for the VdbeOp definition. -*/ -typedef struct VdbeFunc VdbeFunc; -typedef struct Mem Mem; -typedef struct UnpackedRecord UnpackedRecord; - -/* -** A single instruction of the virtual machine has an opcode -** and as many as three operands. The instruction is recorded -** as an instance of the following structure: -*/ -struct VdbeOp { - u8 opcode; /* What operation to perform */ - signed char p4type; /* One of the P4_xxx constants for p4 */ - u8 opflags; /* Not currently used */ - u8 p5; /* Fifth parameter is an unsigned character */ - int p1; /* First operand */ - int p2; /* Second parameter (often the jump destination) */ - int p3; /* The third parameter */ - union { /* forth parameter */ - int i; /* Integer value if p4type==P4_INT32 */ - void *p; /* Generic pointer */ - char *z; /* Pointer to data for string (char array) types */ - i64 *pI64; /* Used when p4type is P4_INT64 */ - double *pReal; /* Used when p4type is P4_REAL */ - FuncDef *pFunc; /* Used when p4type is P4_FUNCDEF */ - VdbeFunc *pVdbeFunc; /* Used when p4type is P4_VDBEFUNC */ - CollSeq *pColl; /* Used when p4type is P4_COLLSEQ */ - Mem *pMem; /* Used when p4type is P4_MEM */ - sqlite3_vtab *pVtab; /* Used when p4type is P4_VTAB */ - KeyInfo *pKeyInfo; /* Used when p4type is P4_KEYINFO */ - } p4; -#ifdef SQLITE_DEBUG - char *zComment; /* Comment to improve readability */ -#endif -#ifdef VDBE_PROFILE - int cnt; /* Number of times this instruction was executed */ - long long cycles; /* Total time spend executing this instruction */ -#endif -}; -typedef struct VdbeOp VdbeOp; - -/* -** A smaller version of VdbeOp used for the VdbeAddOpList() function because -** it takes up less space. -*/ -struct VdbeOpList { - u8 opcode; /* What operation to perform */ - signed char p1; /* First operand */ - signed char p2; /* Second parameter (often the jump destination) */ - signed char p3; /* Third parameter */ -}; -typedef struct VdbeOpList VdbeOpList; - -/* -** Allowed values of VdbeOp.p3type -*/ -#define P4_NOTUSED 0 /* The P4 parameter is not used */ -#define P4_DYNAMIC (-1) /* Pointer to a string obtained from sqliteMalloc() */ -#define P4_STATIC (-2) /* Pointer to a static string */ -#define P4_COLLSEQ (-4) /* P4 is a pointer to a CollSeq structure */ -#define P4_FUNCDEF (-5) /* P4 is a pointer to a FuncDef structure */ -#define P4_KEYINFO (-6) /* P4 is a pointer to a KeyInfo structure */ -#define P4_VDBEFUNC (-7) /* P4 is a pointer to a VdbeFunc structure */ -#define P4_MEM (-8) /* P4 is a pointer to a Mem* structure */ -#define P4_TRANSIENT (-9) /* P4 is a pointer to a transient string */ -#define P4_VTAB (-10) /* P4 is a pointer to an sqlite3_vtab structure */ -#define P4_MPRINTF (-11) /* P4 is a string obtained from sqlite3_mprintf() */ -#define P4_REAL (-12) /* P4 is a 64-bit floating point value */ -#define P4_INT64 (-13) /* P4 is a 64-bit signed integer */ -#define P4_INT32 (-14) /* P4 is a 32-bit signed integer */ - -/* When adding a P4 argument using P4_KEYINFO, a copy of the KeyInfo structure -** is made. That copy is freed when the Vdbe is finalized. But if the -** argument is P4_KEYINFO_HANDOFF, the passed in pointer is used. It still -** gets freed when the Vdbe is finalized so it still should be obtained -** from a single sqliteMalloc(). But no copy is made and the calling -** function should *not* try to free the KeyInfo. -*/ -#define P4_KEYINFO_HANDOFF (-9) - -/* -** The Vdbe.aColName array contains 5n Mem structures, where n is the -** number of columns of data returned by the statement. -*/ -#define COLNAME_NAME 0 -#define COLNAME_DECLTYPE 1 -#define COLNAME_DATABASE 2 -#define COLNAME_TABLE 3 -#define COLNAME_COLUMN 4 -#ifdef SQLITE_ENABLE_COLUMN_METADATA -# define COLNAME_N 5 /* Number of COLNAME_xxx symbols */ -#else -# ifdef SQLITE_OMIT_DECLTYPE -# define COLNAME_N 1 /* Store only the name */ -# else -# define COLNAME_N 2 /* Store the name and decltype */ -# endif -#endif - -/* -** The following macro converts a relative address in the p2 field -** of a VdbeOp structure into a negative number so that -** sqlite3VdbeAddOpList() knows that the address is relative. Calling -** the macro again restores the address. -*/ -#define ADDR(X) (-1-(X)) - -/* -** The makefile scans the vdbe.c source file and creates the "opcodes.h" -** header file that defines a number for each opcode used by the VDBE. -*/ -/************** Include opcodes.h in the middle of vdbe.h ********************/ -/************** Begin file opcodes.h *****************************************/ -/* Automatically generated. Do not edit */ -/* See the mkopcodeh.awk script for details */ -#define OP_VNext 1 -#define OP_Affinity 2 -#define OP_Column 3 -#define OP_SetCookie 4 -#define OP_Real 125 /* same as TK_FLOAT */ -#define OP_Sequence 5 -#define OP_MoveGt 6 -#define OP_Ge 72 /* same as TK_GE */ -#define OP_RowKey 7 -#define OP_SCopy 8 -#define OP_Eq 68 /* same as TK_EQ */ -#define OP_OpenWrite 9 -#define OP_NotNull 66 /* same as TK_NOTNULL */ -#define OP_If 10 -#define OP_ToInt 141 /* same as TK_TO_INT */ -#define OP_String8 88 /* same as TK_STRING */ -#define OP_VRowid 11 -#define OP_CollSeq 12 -#define OP_OpenRead 13 -#define OP_Expire 14 -#define OP_AutoCommit 15 -#define OP_Gt 69 /* same as TK_GT */ -#define OP_IntegrityCk 17 -#define OP_Sort 18 -#define OP_Copy 19 -#define OP_Trace 20 -#define OP_Function 21 -#define OP_IfNeg 22 -#define OP_And 61 /* same as TK_AND */ -#define OP_Subtract 79 /* same as TK_MINUS */ -#define OP_Noop 23 -#define OP_Return 24 -#define OP_Remainder 82 /* same as TK_REM */ -#define OP_NewRowid 25 -#define OP_Multiply 80 /* same as TK_STAR */ -#define OP_Variable 26 -#define OP_String 27 -#define OP_RealAffinity 28 -#define OP_VRename 29 -#define OP_ParseSchema 30 -#define OP_VOpen 31 -#define OP_Close 32 -#define OP_CreateIndex 33 -#define OP_IsUnique 34 -#define OP_NotFound 35 -#define OP_Int64 36 -#define OP_MustBeInt 37 -#define OP_Halt 38 -#define OP_Rowid 39 -#define OP_IdxLT 40 -#define OP_AddImm 41 -#define OP_Statement 42 -#define OP_RowData 43 -#define OP_MemMax 44 -#define OP_Or 60 /* same as TK_OR */ -#define OP_NotExists 45 -#define OP_Gosub 46 -#define OP_Divide 81 /* same as TK_SLASH */ -#define OP_Integer 47 -#define OP_ToNumeric 140 /* same as TK_TO_NUMERIC*/ -#define OP_Prev 48 -#define OP_Concat 83 /* same as TK_CONCAT */ -#define OP_BitAnd 74 /* same as TK_BITAND */ -#define OP_VColumn 49 -#define OP_CreateTable 50 -#define OP_Last 51 -#define OP_IsNull 65 /* same as TK_ISNULL */ -#define OP_IncrVacuum 52 -#define OP_IdxRowid 53 -#define OP_ShiftRight 77 /* same as TK_RSHIFT */ -#define OP_ResetCount 54 -#define OP_FifoWrite 55 -#define OP_ContextPush 56 -#define OP_DropTrigger 57 -#define OP_DropIndex 58 -#define OP_IdxGE 59 -#define OP_IdxDelete 62 -#define OP_Vacuum 63 -#define OP_MoveLe 64 -#define OP_IfNot 73 -#define OP_DropTable 84 -#define OP_MakeRecord 85 -#define OP_ToBlob 139 /* same as TK_TO_BLOB */ -#define OP_ResultRow 86 -#define OP_Delete 89 -#define OP_AggFinal 90 -#define OP_ShiftLeft 76 /* same as TK_LSHIFT */ -#define OP_Goto 91 -#define OP_TableLock 92 -#define OP_FifoRead 93 -#define OP_Clear 94 -#define OP_MoveLt 95 -#define OP_Le 70 /* same as TK_LE */ -#define OP_VerifyCookie 96 -#define OP_AggStep 97 -#define OP_ToText 138 /* same as TK_TO_TEXT */ -#define OP_Not 16 /* same as TK_NOT */ -#define OP_ToReal 142 /* same as TK_TO_REAL */ -#define OP_SetNumColumns 98 -#define OP_Transaction 99 -#define OP_VFilter 100 -#define OP_Ne 67 /* same as TK_NE */ -#define OP_VDestroy 101 -#define OP_ContextPop 102 -#define OP_BitOr 75 /* same as TK_BITOR */ -#define OP_Next 103 -#define OP_IdxInsert 104 -#define OP_Lt 71 /* same as TK_LT */ -#define OP_Insert 105 -#define OP_Destroy 106 -#define OP_ReadCookie 107 -#define OP_ForceInt 108 -#define OP_LoadAnalysis 109 -#define OP_Explain 110 -#define OP_OpenPseudo 111 -#define OP_OpenEphemeral 112 -#define OP_Null 113 -#define OP_Move 114 -#define OP_Blob 115 -#define OP_Add 78 /* same as TK_PLUS */ -#define OP_Rewind 116 -#define OP_MoveGe 117 -#define OP_VBegin 118 -#define OP_VUpdate 119 -#define OP_IfZero 120 -#define OP_BitNot 87 /* same as TK_BITNOT */ -#define OP_VCreate 121 -#define OP_Found 122 -#define OP_IfPos 123 -#define OP_NullRow 124 - -/* The following opcode values are never used */ -#define OP_NotUsed_126 126 -#define OP_NotUsed_127 127 -#define OP_NotUsed_128 128 -#define OP_NotUsed_129 129 -#define OP_NotUsed_130 130 -#define OP_NotUsed_131 131 -#define OP_NotUsed_132 132 -#define OP_NotUsed_133 133 -#define OP_NotUsed_134 134 -#define OP_NotUsed_135 135 -#define OP_NotUsed_136 136 -#define OP_NotUsed_137 137 - - -/* Properties such as "out2" or "jump" that are specified in -** comments following the "case" for each opcode in the vdbe.c -** are encoded into bitvectors as follows: -*/ -#define OPFLG_JUMP 0x0001 /* jump: P2 holds jmp target */ -#define OPFLG_OUT2_PRERELEASE 0x0002 /* out2-prerelease: */ -#define OPFLG_IN1 0x0004 /* in1: P1 is an input */ -#define OPFLG_IN2 0x0008 /* in2: P2 is an input */ -#define OPFLG_IN3 0x0010 /* in3: P3 is an input */ -#define OPFLG_OUT3 0x0020 /* out3: P3 is an output */ -#define OPFLG_INITIALIZER {\ -/* 0 */ 0x00, 0x01, 0x00, 0x00, 0x10, 0x02, 0x11, 0x00,\ -/* 8 */ 0x00, 0x00, 0x05, 0x02, 0x00, 0x00, 0x00, 0x00,\ -/* 16 */ 0x04, 0x00, 0x01, 0x00, 0x00, 0x00, 0x05, 0x00,\ -/* 24 */ 0x00, 0x02, 0x02, 0x02, 0x04, 0x00, 0x00, 0x00,\ -/* 32 */ 0x00, 0x02, 0x11, 0x11, 0x02, 0x05, 0x00, 0x02,\ -/* 40 */ 0x11, 0x04, 0x00, 0x00, 0x0c, 0x11, 0x01, 0x02,\ -/* 48 */ 0x01, 0x00, 0x02, 0x01, 0x01, 0x02, 0x00, 0x04,\ -/* 56 */ 0x00, 0x00, 0x00, 0x11, 0x2c, 0x2c, 0x00, 0x00,\ -/* 64 */ 0x11, 0x05, 0x05, 0x15, 0x15, 0x15, 0x15, 0x15,\ -/* 72 */ 0x15, 0x05, 0x2c, 0x2c, 0x2c, 0x2c, 0x2c, 0x2c,\ -/* 80 */ 0x2c, 0x2c, 0x2c, 0x2c, 0x00, 0x00, 0x00, 0x04,\ -/* 88 */ 0x02, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x11,\ -/* 96 */ 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01,\ -/* 104 */ 0x08, 0x00, 0x02, 0x02, 0x05, 0x00, 0x00, 0x00,\ -/* 112 */ 0x00, 0x02, 0x00, 0x02, 0x01, 0x11, 0x00, 0x00,\ -/* 120 */ 0x05, 0x00, 0x11, 0x05, 0x00, 0x02, 0x00, 0x00,\ -/* 128 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\ -/* 136 */ 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04,} - -/************** End of opcodes.h *********************************************/ -/************** Continuing where we left off in vdbe.h ***********************/ - -/* -** Prototypes for the VDBE interface. See comments on the implementation -** for a description of what each of these routines does. -*/ -SQLITE_PRIVATE Vdbe *sqlite3VdbeCreate(sqlite3*); -SQLITE_PRIVATE int sqlite3VdbeAddOp0(Vdbe*,int); -SQLITE_PRIVATE int sqlite3VdbeAddOp1(Vdbe*,int,int); -SQLITE_PRIVATE int sqlite3VdbeAddOp2(Vdbe*,int,int,int); -SQLITE_PRIVATE int sqlite3VdbeAddOp3(Vdbe*,int,int,int,int); -SQLITE_PRIVATE int sqlite3VdbeAddOp4(Vdbe*,int,int,int,int,const char *zP4,int); -SQLITE_PRIVATE int sqlite3VdbeAddOpList(Vdbe*, int nOp, VdbeOpList const *aOp); -SQLITE_PRIVATE void sqlite3VdbeChangeP1(Vdbe*, int addr, int P1); -SQLITE_PRIVATE void sqlite3VdbeChangeP2(Vdbe*, int addr, int P2); -SQLITE_PRIVATE void sqlite3VdbeChangeP3(Vdbe*, int addr, int P3); -SQLITE_PRIVATE void sqlite3VdbeChangeP5(Vdbe*, u8 P5); -SQLITE_PRIVATE void sqlite3VdbeJumpHere(Vdbe*, int addr); -SQLITE_PRIVATE void sqlite3VdbeChangeToNoop(Vdbe*, int addr, int N); -SQLITE_PRIVATE void sqlite3VdbeChangeP4(Vdbe*, int addr, const char *zP4, int N); -SQLITE_PRIVATE void sqlite3VdbeUsesBtree(Vdbe*, int); -SQLITE_PRIVATE VdbeOp *sqlite3VdbeGetOp(Vdbe*, int); -SQLITE_PRIVATE int sqlite3VdbeMakeLabel(Vdbe*); -SQLITE_PRIVATE void sqlite3VdbeDelete(Vdbe*); -SQLITE_PRIVATE void sqlite3VdbeMakeReady(Vdbe*,int,int,int,int); -SQLITE_PRIVATE int sqlite3VdbeFinalize(Vdbe*); -SQLITE_PRIVATE void sqlite3VdbeResolveLabel(Vdbe*, int); -SQLITE_PRIVATE int sqlite3VdbeCurrentAddr(Vdbe*); -#ifdef SQLITE_DEBUG -SQLITE_PRIVATE void sqlite3VdbeTrace(Vdbe*,FILE*); -#endif -SQLITE_PRIVATE void sqlite3VdbeResetStepResult(Vdbe*); -SQLITE_PRIVATE int sqlite3VdbeReset(Vdbe*, int); -SQLITE_PRIVATE void sqlite3VdbeSetNumCols(Vdbe*,int); -SQLITE_PRIVATE int sqlite3VdbeSetColName(Vdbe*, int, int, const char *, int); -SQLITE_PRIVATE void sqlite3VdbeCountChanges(Vdbe*); -SQLITE_PRIVATE sqlite3 *sqlite3VdbeDb(Vdbe*); -SQLITE_PRIVATE void sqlite3VdbeSetSql(Vdbe*, const char *z, int n); -SQLITE_PRIVATE void sqlite3VdbeSwap(Vdbe*,Vdbe*); - -#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT -SQLITE_PRIVATE int sqlite3VdbeReleaseMemory(int); -#endif -SQLITE_PRIVATE UnpackedRecord *sqlite3VdbeRecordUnpack(KeyInfo*,int,const void*,void*,int); -SQLITE_PRIVATE void sqlite3VdbeDeleteUnpackedRecord(UnpackedRecord*); -SQLITE_PRIVATE int sqlite3VdbeRecordCompare(int,const void*,UnpackedRecord*); - - -#ifndef NDEBUG -SQLITE_PRIVATE void sqlite3VdbeComment(Vdbe*, const char*, ...); -# define VdbeComment(X) sqlite3VdbeComment X -#else -# define VdbeComment(X) -#endif - -#endif - -/************** End of vdbe.h ************************************************/ -/************** Continuing where we left off in sqliteInt.h ******************/ -/************** Include pager.h in the middle of sqliteInt.h *****************/ -/************** Begin file pager.h *******************************************/ -/* -** 2001 September 15 -** -** The author disclaims copyright to this source code. In place of -** a legal notice, here is a blessing: -** -** May you do good and not evil. -** May you find forgiveness for yourself and forgive others. -** May you share freely, never taking more than you give. -** -************************************************************************* -** This header file defines the interface that the sqlite page cache -** subsystem. The page cache subsystem reads and writes a file a page -** at a time and provides a journal for rollback. -** -** @(#) $Id: pager.h,v 1.72 2008/05/01 17:03:49 drh Exp $ -*/ - -#ifndef _PAGER_H_ -#define _PAGER_H_ - -/* -** The type used to represent a page number. The first page in a file -** is called page 1. 0 is used to represent "not a page". -*/ -typedef unsigned int Pgno; - -/* -** Each open file is managed by a separate instance of the "Pager" structure. -*/ -typedef struct Pager Pager; - -/* -** Handle type for pages. -*/ -typedef struct PgHdr DbPage; - -/* -** Allowed values for the flags parameter to sqlite3PagerOpen(). -** -** NOTE: This values must match the corresponding BTREE_ values in btree.h. -*/ -#define PAGER_OMIT_JOURNAL 0x0001 /* Do not use a rollback journal */ -#define PAGER_NO_READLOCK 0x0002 /* Omit readlocks on readonly files */ - -/* -** Valid values for the second argument to sqlite3PagerLockingMode(). -*/ -#define PAGER_LOCKINGMODE_QUERY -1 -#define PAGER_LOCKINGMODE_NORMAL 0 -#define PAGER_LOCKINGMODE_EXCLUSIVE 1 - -/* -** Valid values for the second argument to sqlite3PagerJournalMode(). -*/ -#define PAGER_JOURNALMODE_QUERY -1 -#define PAGER_JOURNALMODE_DELETE 0 /* Commit by deleting journal file */ -#define PAGER_JOURNALMODE_PERSIST 1 /* Commit by zeroing journal header */ -#define PAGER_JOURNALMODE_OFF 2 /* Journal omitted. */ - -/* -** See source code comments for a detailed description of the following -** routines: -*/ -SQLITE_PRIVATE int sqlite3PagerOpen(sqlite3_vfs *, Pager **ppPager, const char*, int,int,int); -SQLITE_PRIVATE void sqlite3PagerSetBusyhandler(Pager*, BusyHandler *pBusyHandler); -SQLITE_PRIVATE void sqlite3PagerSetDestructor(Pager*, void(*)(DbPage*,int)); -SQLITE_PRIVATE void sqlite3PagerSetReiniter(Pager*, void(*)(DbPage*,int)); -SQLITE_PRIVATE int sqlite3PagerSetPagesize(Pager*, u16*); -SQLITE_PRIVATE int sqlite3PagerMaxPageCount(Pager*, int); -SQLITE_PRIVATE int sqlite3PagerReadFileheader(Pager*, int, unsigned char*); -SQLITE_PRIVATE void sqlite3PagerSetCachesize(Pager*, int); -SQLITE_PRIVATE int sqlite3PagerClose(Pager *pPager); -SQLITE_PRIVATE int sqlite3PagerAcquire(Pager *pPager, Pgno pgno, DbPage **ppPage, int clrFlag); -#define sqlite3PagerGet(A,B,C) sqlite3PagerAcquire(A,B,C,0) -SQLITE_PRIVATE DbPage *sqlite3PagerLookup(Pager *pPager, Pgno pgno); -SQLITE_PRIVATE int sqlite3PagerRef(DbPage*); -SQLITE_PRIVATE int sqlite3PagerUnref(DbPage*); -SQLITE_PRIVATE int sqlite3PagerWrite(DbPage*); -SQLITE_PRIVATE int sqlite3PagerPagecount(Pager*); -SQLITE_PRIVATE int sqlite3PagerTruncate(Pager*,Pgno); -SQLITE_PRIVATE int sqlite3PagerBegin(DbPage*, int exFlag); -SQLITE_PRIVATE int sqlite3PagerCommitPhaseOne(Pager*,const char *zMaster, Pgno, int); -SQLITE_PRIVATE int sqlite3PagerCommitPhaseTwo(Pager*); -SQLITE_PRIVATE int sqlite3PagerRollback(Pager*); -SQLITE_PRIVATE int sqlite3PagerIsreadonly(Pager*); -SQLITE_PRIVATE int sqlite3PagerStmtBegin(Pager*); -SQLITE_PRIVATE int sqlite3PagerStmtCommit(Pager*); -SQLITE_PRIVATE int sqlite3PagerStmtRollback(Pager*); -SQLITE_PRIVATE void sqlite3PagerDontRollback(DbPage*); -SQLITE_PRIVATE void sqlite3PagerDontWrite(DbPage*); -SQLITE_PRIVATE int sqlite3PagerRefcount(Pager*); -SQLITE_PRIVATE void sqlite3PagerSetSafetyLevel(Pager*,int,int); -SQLITE_PRIVATE const char *sqlite3PagerFilename(Pager*); -SQLITE_PRIVATE const sqlite3_vfs *sqlite3PagerVfs(Pager*); -SQLITE_PRIVATE sqlite3_file *sqlite3PagerFile(Pager*); -SQLITE_PRIVATE const char *sqlite3PagerDirname(Pager*); -SQLITE_PRIVATE const char *sqlite3PagerJournalname(Pager*); -SQLITE_PRIVATE int sqlite3PagerNosync(Pager*); -SQLITE_PRIVATE int sqlite3PagerMovepage(Pager*,DbPage*,Pgno); -SQLITE_PRIVATE void *sqlite3PagerGetData(DbPage *); -SQLITE_PRIVATE void *sqlite3PagerGetExtra(DbPage *); -SQLITE_PRIVATE int sqlite3PagerLockingMode(Pager *, int); -SQLITE_PRIVATE int sqlite3PagerJournalMode(Pager *, int); -SQLITE_PRIVATE void *sqlite3PagerTempSpace(Pager*); -SQLITE_PRIVATE int sqlite3PagerSync(Pager *pPager); - -#if defined(SQLITE_ENABLE_MEMORY_MANAGEMENT) && !defined(SQLITE_OMIT_DISKIO) -SQLITE_PRIVATE int sqlite3PagerReleaseMemory(int); -#endif - -#ifdef SQLITE_HAS_CODEC -SQLITE_PRIVATE void sqlite3PagerSetCodec(Pager*,void*(*)(void*,void*,Pgno,int),void*); -#endif - -#if !defined(NDEBUG) || defined(SQLITE_TEST) -SQLITE_PRIVATE Pgno sqlite3PagerPagenumber(DbPage*); -SQLITE_PRIVATE int sqlite3PagerIswriteable(DbPage*); -#endif - -#ifdef SQLITE_TEST -SQLITE_PRIVATE int *sqlite3PagerStats(Pager*); -SQLITE_PRIVATE void sqlite3PagerRefdump(Pager*); -#endif - -#ifdef SQLITE_TEST -void disable_simulated_io_errors(void); -void enable_simulated_io_errors(void); -#else -# define disable_simulated_io_errors() -# define enable_simulated_io_errors() -#endif - -#endif /* _PAGER_H_ */ - -/************** End of pager.h ***********************************************/ -/************** Continuing where we left off in sqliteInt.h ******************/ - -/************** Include os.h in the middle of sqliteInt.h ********************/ -/************** Begin file os.h **********************************************/ -/* -** 2001 September 16 -** -** The author disclaims copyright to this source code. In place of -** a legal notice, here is a blessing: -** -** May you do good and not evil. -** May you find forgiveness for yourself and forgive others. -** May you share freely, never taking more than you give. -** -****************************************************************************** -** -** This header file (together with is companion C source-code file -** "os.c") attempt to abstract the underlying operating system so that -** the SQLite library will work on both POSIX and windows systems. -** -** This header file is #include-ed by sqliteInt.h and thus ends up -** being included by every source file. -*/ -#ifndef _SQLITE_OS_H_ -#define _SQLITE_OS_H_ - -/* -** Figure out if we are dealing with Unix, Windows, or some other -** operating system. After the following block of preprocess macros, -** all of OS_UNIX, OS_WIN, OS_OS2, and OS_OTHER will defined to either -** 1 or 0. One of the four will be 1. The other three will be 0. -*/ -#if defined(OS_OTHER) -# if OS_OTHER==1 -# undef OS_UNIX -# define OS_UNIX 0 -# undef OS_WIN -# define OS_WIN 0 -# undef OS_OS2 -# define OS_OS2 0 -# else -# undef OS_OTHER -# endif -#endif -#if !defined(OS_UNIX) && !defined(OS_OTHER) -# define OS_OTHER 0 -# ifndef OS_WIN -# if defined(_WIN32) || defined(WIN32) || defined(__CYGWIN__) || defined(__MINGW32__) || defined(__BORLANDC__) -# define OS_WIN 1 -# define OS_UNIX 0 -# define OS_OS2 0 -# elif defined(__EMX__) || defined(_OS2) || defined(OS2) || defined(_OS2_) || defined(__OS2__) -# define OS_WIN 0 -# define OS_UNIX 0 -# define OS_OS2 1 -# else -# define OS_WIN 0 -# define OS_UNIX 1 -# define OS_OS2 0 -# endif -# else -# define OS_UNIX 0 -# define OS_OS2 0 -# endif -#else -# ifndef OS_WIN -# define OS_WIN 0 -# endif -#endif - - - -/* -** Define the maximum size of a temporary filename -*/ -#if OS_WIN -# include -# define SQLITE_TEMPNAME_SIZE (MAX_PATH+50) -#elif OS_OS2 -# if (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ >= 3) && defined(OS2_HIGH_MEMORY) -# include /* has to be included before os2.h for linking to work */ -# endif -# define INCL_DOSDATETIME -# define INCL_DOSFILEMGR -# define INCL_DOSERRORS -# define INCL_DOSMISC -# define INCL_DOSPROCESS -# define INCL_DOSMODULEMGR -# define INCL_DOSSEMAPHORES -# include -# include -# define SQLITE_TEMPNAME_SIZE (CCHMAXPATHCOMP) -#else -# define SQLITE_TEMPNAME_SIZE 200 -#endif - -/* If the SET_FULLSYNC macro is not defined above, then make it -** a no-op -*/ -#ifndef SET_FULLSYNC -# define SET_FULLSYNC(x,y) -#endif - -/* -** The default size of a disk sector -*/ -#ifndef SQLITE_DEFAULT_SECTOR_SIZE -# define SQLITE_DEFAULT_SECTOR_SIZE 512 -#endif - -/* -** Temporary files are named starting with this prefix followed by 16 random -** alphanumeric characters, and no file extension. They are stored in the -** OS's standard temporary file directory, and are deleted prior to exit. -** If sqlite is being embedded in another program, you may wish to change the -** prefix to reflect your program's name, so that if your program exits -** prematurely, old temporary files can be easily identified. This can be done -** using -DSQLITE_TEMP_FILE_PREFIX=myprefix_ on the compiler command line. -** -** 2006-10-31: The default prefix used to be "sqlite_". But then -** Mcafee started using SQLite in their anti-virus product and it -** started putting files with the "sqlite" name in the c:/temp folder. -** This annoyed many windows users. Those users would then do a -** Google search for "sqlite", find the telephone numbers of the -** developers and call to wake them up at night and complain. -** For this reason, the default name prefix is changed to be "sqlite" -** spelled backwards. So the temp files are still identified, but -** anybody smart enough to figure out the code is also likely smart -** enough to know that calling the developer will not help get rid -** of the file. -*/ -#ifndef SQLITE_TEMP_FILE_PREFIX -# define SQLITE_TEMP_FILE_PREFIX "etilqs_" -#endif - -/* -** The following values may be passed as the second argument to -** sqlite3OsLock(). The various locks exhibit the following semantics: -** -** SHARED: Any number of processes may hold a SHARED lock simultaneously. -** RESERVED: A single process may hold a RESERVED lock on a file at -** any time. Other processes may hold and obtain new SHARED locks. -** PENDING: A single process may hold a PENDING lock on a file at -** any one time. Existing SHARED locks may persist, but no new -** SHARED locks may be obtained by other processes. -** EXCLUSIVE: An EXCLUSIVE lock precludes all other locks. -** -** PENDING_LOCK may not be passed directly to sqlite3OsLock(). Instead, a -** process that requests an EXCLUSIVE lock may actually obtain a PENDING -** lock. This can be upgraded to an EXCLUSIVE lock by a subsequent call to -** sqlite3OsLock(). -*/ -#define NO_LOCK 0 -#define SHARED_LOCK 1 -#define RESERVED_LOCK 2 -#define PENDING_LOCK 3 -#define EXCLUSIVE_LOCK 4 - -/* -** File Locking Notes: (Mostly about windows but also some info for Unix) -** -** We cannot use LockFileEx() or UnlockFileEx() on Win95/98/ME because -** those functions are not available. So we use only LockFile() and -** UnlockFile(). -** -** LockFile() prevents not just writing but also reading by other processes. -** A SHARED_LOCK is obtained by locking a single randomly-chosen -** byte out of a specific range of bytes. The lock byte is obtained at -** random so two separate readers can probably access the file at the -** same time, unless they are unlucky and choose the same lock byte. -** An EXCLUSIVE_LOCK is obtained by locking all bytes in the range. -** There can only be one writer. A RESERVED_LOCK is obtained by locking -** a single byte of the file that is designated as the reserved lock byte. -** A PENDING_LOCK is obtained by locking a designated byte different from -** the RESERVED_LOCK byte. -** -** On WinNT/2K/XP systems, LockFileEx() and UnlockFileEx() are available, -** which means we can use reader/writer locks. When reader/writer locks -** are used, the lock is placed on the same range of bytes that is used -** for probabilistic locking in Win95/98/ME. Hence, the locking scheme -** will support two or more Win95 readers or two or more WinNT readers. -** But a single Win95 reader will lock out all WinNT readers and a single -** WinNT reader will lock out all other Win95 readers. -** -** The following #defines specify the range of bytes used for locking. -** SHARED_SIZE is the number of bytes available in the pool from which -** a random byte is selected for a shared lock. The pool of bytes for -** shared locks begins at SHARED_FIRST. -** -** These #defines are available in sqlite_aux.h so that adaptors for -** connecting SQLite to other operating systems can use the same byte -** ranges for locking. In particular, the same locking strategy and -** byte ranges are used for Unix. This leaves open the possiblity of having -** clients on win95, winNT, and unix all talking to the same shared file -** and all locking correctly. To do so would require that samba (or whatever -** tool is being used for file sharing) implements locks correctly between -** windows and unix. I'm guessing that isn't likely to happen, but by -** using the same locking range we are at least open to the possibility. -** -** Locking in windows is manditory. For this reason, we cannot store -** actual data in the bytes used for locking. The pager never allocates -** the pages involved in locking therefore. SHARED_SIZE is selected so -** that all locks will fit on a single page even at the minimum page size. -** PENDING_BYTE defines the beginning of the locks. By default PENDING_BYTE -** is set high so that we don't have to allocate an unused page except -** for very large databases. But one should test the page skipping logic -** by setting PENDING_BYTE low and running the entire regression suite. -** -** Changing the value of PENDING_BYTE results in a subtly incompatible -** file format. Depending on how it is changed, you might not notice -** the incompatibility right away, even running a full regression test. -** The default location of PENDING_BYTE is the first byte past the -** 1GB boundary. -** -*/ -#ifndef SQLITE_TEST -#define PENDING_BYTE 0x40000000 /* First byte past the 1GB boundary */ -#else -SQLITE_API extern unsigned int sqlite3_pending_byte; -#define PENDING_BYTE sqlite3_pending_byte -#endif - -#define RESERVED_BYTE (PENDING_BYTE+1) -#define SHARED_FIRST (PENDING_BYTE+2) -#define SHARED_SIZE 510 - -/* -** Functions for accessing sqlite3_file methods -*/ -SQLITE_PRIVATE int sqlite3OsClose(sqlite3_file*); -SQLITE_PRIVATE int sqlite3OsRead(sqlite3_file*, void*, int amt, i64 offset); -SQLITE_PRIVATE int sqlite3OsWrite(sqlite3_file*, const void*, int amt, i64 offset); -SQLITE_PRIVATE int sqlite3OsTruncate(sqlite3_file*, i64 size); -SQLITE_PRIVATE int sqlite3OsSync(sqlite3_file*, int); -SQLITE_PRIVATE int sqlite3OsFileSize(sqlite3_file*, i64 *pSize); -SQLITE_PRIVATE int sqlite3OsLock(sqlite3_file*, int); -SQLITE_PRIVATE int sqlite3OsUnlock(sqlite3_file*, int); -SQLITE_PRIVATE int sqlite3OsCheckReservedLock(sqlite3_file *id); -SQLITE_PRIVATE int sqlite3OsFileControl(sqlite3_file*,int,void*); -SQLITE_PRIVATE int sqlite3OsSectorSize(sqlite3_file *id); -SQLITE_PRIVATE int sqlite3OsDeviceCharacteristics(sqlite3_file *id); - -/* -** Functions for accessing sqlite3_vfs methods -*/ -SQLITE_PRIVATE int sqlite3OsOpen(sqlite3_vfs *, const char *, sqlite3_file*, int, int *); -SQLITE_PRIVATE int sqlite3OsDelete(sqlite3_vfs *, const char *, int); -SQLITE_PRIVATE int sqlite3OsAccess(sqlite3_vfs *, const char *, int); -SQLITE_PRIVATE int sqlite3OsGetTempname(sqlite3_vfs *, int, char *); -SQLITE_PRIVATE int sqlite3OsFullPathname(sqlite3_vfs *, const char *, int, char *); -SQLITE_PRIVATE void *sqlite3OsDlOpen(sqlite3_vfs *, const char *); -SQLITE_PRIVATE void sqlite3OsDlError(sqlite3_vfs *, int, char *); -SQLITE_PRIVATE void *sqlite3OsDlSym(sqlite3_vfs *, void *, const char *); -SQLITE_PRIVATE void sqlite3OsDlClose(sqlite3_vfs *, void *); -SQLITE_PRIVATE int sqlite3OsRandomness(sqlite3_vfs *, int, char *); -SQLITE_PRIVATE int sqlite3OsSleep(sqlite3_vfs *, int); -SQLITE_PRIVATE int sqlite3OsCurrentTime(sqlite3_vfs *, double*); - -/* -** Convenience functions for opening and closing files using -** sqlite3_malloc() to obtain space for the file-handle structure. -*/ -SQLITE_PRIVATE int sqlite3OsOpenMalloc(sqlite3_vfs *, const char *, sqlite3_file **, int,int*); -SQLITE_PRIVATE int sqlite3OsCloseFree(sqlite3_file *); - -/* -** Each OS-specific backend defines an instance of the following -** structure for returning a pointer to its sqlite3_vfs. If OS_OTHER -** is defined (meaning that the application-defined OS interface layer -** is used) then there is no default VFS. The application must -** register one or more VFS structures using sqlite3_vfs_register() -** before attempting to use SQLite. -*/ -SQLITE_PRIVATE sqlite3_vfs *sqlite3OsDefaultVfs(void); - -#endif /* _SQLITE_OS_H_ */ - -/************** End of os.h **************************************************/ -/************** Continuing where we left off in sqliteInt.h ******************/ -/************** Include mutex.h in the middle of sqliteInt.h *****************/ -/************** Begin file mutex.h *******************************************/ -/* -** 2007 August 28 -** -** The author disclaims copyright to this source code. In place of -** a legal notice, here is a blessing: -** -** May you do good and not evil. -** May you find forgiveness for yourself and forgive others. -** May you share freely, never taking more than you give. -** -************************************************************************* -** -** This file contains the common header for all mutex implementations. -** The sqliteInt.h header #includes this file so that it is available -** to all source files. We break it out in an effort to keep the code -** better organized. -** -** NOTE: source files should *not* #include this header file directly. -** Source files should #include the sqliteInt.h file and let that file -** include this one indirectly. -** -** $Id: mutex.h,v 1.2 2007/08/30 14:10:30 drh Exp $ -*/ - - -#ifdef SQLITE_MUTEX_APPDEF -/* -** If SQLITE_MUTEX_APPDEF is defined, then this whole module is -** omitted and equivalent functionality must be provided by the -** application that links against the SQLite library. -*/ -#else -/* -** Figure out what version of the code to use. The choices are -** -** SQLITE_MUTEX_NOOP For single-threaded applications that -** do not desire error checking. -** -** SQLITE_MUTEX_NOOP_DEBUG For single-threaded applications with -** error checking to help verify that mutexes -** are being used correctly even though they -** are not needed. Used when SQLITE_DEBUG is -** defined on single-threaded builds. -** -** SQLITE_MUTEX_PTHREADS For multi-threaded applications on Unix. -** -** SQLITE_MUTEX_W32 For multi-threaded applications on Win32. -** -** SQLITE_MUTEX_OS2 For multi-threaded applications on OS/2. -*/ -#define SQLITE_MUTEX_NOOP 1 /* The default */ -#if defined(SQLITE_DEBUG) && !SQLITE_THREADSAFE -# undef SQLITE_MUTEX_NOOP -# define SQLITE_MUTEX_NOOP_DEBUG -#endif -#if defined(SQLITE_MUTEX_NOOP) && SQLITE_THREADSAFE && OS_UNIX -# undef SQLITE_MUTEX_NOOP -# define SQLITE_MUTEX_PTHREADS -#endif -#if defined(SQLITE_MUTEX_NOOP) && SQLITE_THREADSAFE && OS_WIN -# undef SQLITE_MUTEX_NOOP -# define SQLITE_MUTEX_W32 -#endif -#if defined(SQLITE_MUTEX_NOOP) && SQLITE_THREADSAFE && OS_OS2 -# undef SQLITE_MUTEX_NOOP -# define SQLITE_MUTEX_OS2 -#endif - -#ifdef SQLITE_MUTEX_NOOP -/* -** If this is a no-op implementation, implement everything as macros. -*/ -#define sqlite3_mutex_alloc(X) ((sqlite3_mutex*)8) -#define sqlite3_mutex_free(X) -#define sqlite3_mutex_enter(X) -#define sqlite3_mutex_try(X) SQLITE_OK -#define sqlite3_mutex_leave(X) -#define sqlite3_mutex_held(X) 1 -#define sqlite3_mutex_notheld(X) 1 -#endif - -#endif /* SQLITE_MUTEX_APPDEF */ - -/************** End of mutex.h ***********************************************/ -/************** Continuing where we left off in sqliteInt.h ******************/ - - -/* -** Each database file to be accessed by the system is an instance -** of the following structure. There are normally two of these structures -** in the sqlite.aDb[] array. aDb[0] is the main database file and -** aDb[1] is the database file used to hold temporary tables. Additional -** databases may be attached. -*/ -struct Db { - char *zName; /* Name of this database */ - Btree *pBt; /* The B*Tree structure for this database file */ - u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */ - u8 safety_level; /* How aggressive at synching data to disk */ - void *pAux; /* Auxiliary data. Usually NULL */ - void (*xFreeAux)(void*); /* Routine to free pAux */ - Schema *pSchema; /* Pointer to database schema (possibly shared) */ -}; - -/* -** An instance of the following structure stores a database schema. -** -** If there are no virtual tables configured in this schema, the -** Schema.db variable is set to NULL. After the first virtual table -** has been added, it is set to point to the database connection -** used to create the connection. Once a virtual table has been -** added to the Schema structure and the Schema.db variable populated, -** only that database connection may use the Schema to prepare -** statements. -*/ -struct Schema { - int schema_cookie; /* Database schema version number for this file */ - Hash tblHash; /* All tables indexed by name */ - Hash idxHash; /* All (named) indices indexed by name */ - Hash trigHash; /* All triggers indexed by name */ - Hash aFKey; /* Foreign keys indexed by to-table */ - Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */ - u8 file_format; /* Schema format version for this file */ - u8 enc; /* Text encoding used by this database */ - u16 flags; /* Flags associated with this schema */ - int cache_size; /* Number of pages to use in the cache */ -#ifndef SQLITE_OMIT_VIRTUALTABLE - sqlite3 *db; /* "Owner" connection. See comment above */ -#endif -}; - -/* -** These macros can be used to test, set, or clear bits in the -** Db.flags field. -*/ -#define DbHasProperty(D,I,P) (((D)->aDb[I].pSchema->flags&(P))==(P)) -#define DbHasAnyProperty(D,I,P) (((D)->aDb[I].pSchema->flags&(P))!=0) -#define DbSetProperty(D,I,P) (D)->aDb[I].pSchema->flags|=(P) -#define DbClearProperty(D,I,P) (D)->aDb[I].pSchema->flags&=~(P) - -/* -** Allowed values for the DB.flags field. -** -** The DB_SchemaLoaded flag is set after the database schema has been -** read into internal hash tables. -** -** DB_UnresetViews means that one or more views have column names that -** have been filled out. If the schema changes, these column names might -** changes and so the view will need to be reset. -*/ -#define DB_SchemaLoaded 0x0001 /* The schema has been loaded */ -#define DB_UnresetViews 0x0002 /* Some views have defined column names */ -#define DB_Empty 0x0004 /* The file is empty (length 0 bytes) */ - -/* -** The number of different kinds of things that can be limited -** using the sqlite3_limit() interface. -*/ -#define SQLITE_N_LIMIT (SQLITE_LIMIT_VARIABLE_NUMBER+1) - -/* -** Each database is an instance of the following structure. -** -** The sqlite.lastRowid records the last insert rowid generated by an -** insert statement. Inserts on views do not affect its value. Each -** trigger has its own context, so that lastRowid can be updated inside -** triggers as usual. The previous value will be restored once the trigger -** exits. Upon entering a before or instead of trigger, lastRowid is no -** longer (since after version 2.8.12) reset to -1. -** -** The sqlite.nChange does not count changes within triggers and keeps no -** context. It is reset at start of sqlite3_exec. -** The sqlite.lsChange represents the number of changes made by the last -** insert, update, or delete statement. It remains constant throughout the -** length of a statement and is then updated by OP_SetCounts. It keeps a -** context stack just like lastRowid so that the count of changes -** within a trigger is not seen outside the trigger. Changes to views do not -** affect the value of lsChange. -** The sqlite.csChange keeps track of the number of current changes (since -** the last statement) and is used to update sqlite_lsChange. -** -** The member variables sqlite.errCode, sqlite.zErrMsg and sqlite.zErrMsg16 -** store the most recent error code and, if applicable, string. The -** internal function sqlite3Error() is used to set these variables -** consistently. -*/ -struct sqlite3 { - sqlite3_vfs *pVfs; /* OS Interface */ - int nDb; /* Number of backends currently in use */ - Db *aDb; /* All backends */ - int flags; /* Miscellanous flags. See below */ - int openFlags; /* Flags passed to sqlite3_vfs.xOpen() */ - int errCode; /* Most recent error code (SQLITE_*) */ - int errMask; /* & result codes with this before returning */ - u8 autoCommit; /* The auto-commit flag. */ - u8 temp_store; /* 1: file 2: memory 0: default */ - u8 mallocFailed; /* True if we have seen a malloc failure */ - u8 dfltLockMode; /* Default locking-mode for attached dbs */ - u8 dfltJournalMode; /* Default journal mode for attached dbs */ - signed char nextAutovac; /* Autovac setting after VACUUM if >=0 */ - int nextPagesize; /* Pagesize after VACUUM if >0 */ - int nTable; /* Number of tables in the database */ - CollSeq *pDfltColl; /* The default collating sequence (BINARY) */ - i64 lastRowid; /* ROWID of most recent insert (see above) */ - i64 priorNewRowid; /* Last randomly generated ROWID */ - int magic; /* Magic number for detect library misuse */ - int nChange; /* Value returned by sqlite3_changes() */ - int nTotalChange; /* Value returned by sqlite3_total_changes() */ - sqlite3_mutex *mutex; /* Connection mutex */ - int aLimit[SQLITE_N_LIMIT]; /* Limits */ - struct sqlite3InitInfo { /* Information used during initialization */ - int iDb; /* When back is being initialized */ - int newTnum; /* Rootpage of table being initialized */ - u8 busy; /* TRUE if currently initializing */ - } init; - int nExtension; /* Number of loaded extensions */ - void **aExtension; /* Array of shared libraray handles */ - struct Vdbe *pVdbe; /* List of active virtual machines */ - int activeVdbeCnt; /* Number of vdbes currently executing */ - void (*xTrace)(void*,const char*); /* Trace function */ - void *pTraceArg; /* Argument to the trace function */ - void (*xProfile)(void*,const char*,u64); /* Profiling function */ - void *pProfileArg; /* Argument to profile function */ - void *pCommitArg; /* Argument to xCommitCallback() */ - int (*xCommitCallback)(void*); /* Invoked at every commit. */ - void *pRollbackArg; /* Argument to xRollbackCallback() */ - void (*xRollbackCallback)(void*); /* Invoked at every commit. */ - void *pUpdateArg; - void (*xUpdateCallback)(void*,int, const char*,const char*,sqlite_int64); - void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*); - void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*); - void *pCollNeededArg; - sqlite3_value *pErr; /* Most recent error message */ - char *zErrMsg; /* Most recent error message (UTF-8 encoded) */ - char *zErrMsg16; /* Most recent error message (UTF-16 encoded) */ - union { - int isInterrupted; /* True if sqlite3_interrupt has been called */ - double notUsed1; /* Spacer */ - } u1; -#ifndef SQLITE_OMIT_AUTHORIZATION - int (*xAuth)(void*,int,const char*,const char*,const char*,const char*); - /* Access authorization function */ - void *pAuthArg; /* 1st argument to the access auth function */ -#endif -#ifndef SQLITE_OMIT_PROGRESS_CALLBACK - int (*xProgress)(void *); /* The progress callback */ - void *pProgressArg; /* Argument to the progress callback */ - int nProgressOps; /* Number of opcodes for progress callback */ -#endif -#ifndef SQLITE_OMIT_VIRTUALTABLE - Hash aModule; /* populated by sqlite3_create_module() */ - Table *pVTab; /* vtab with active Connect/Create method */ - sqlite3_vtab **aVTrans; /* Virtual tables with open transactions */ - int nVTrans; /* Allocated size of aVTrans */ -#endif - Hash aFunc; /* All functions that can be in SQL exprs */ - Hash aCollSeq; /* All collating sequences */ - BusyHandler busyHandler; /* Busy callback */ - int busyTimeout; /* Busy handler timeout, in msec */ - Db aDbStatic[2]; /* Static space for the 2 default backends */ -#ifdef SQLITE_SSE - sqlite3_stmt *pFetch; /* Used by SSE to fetch stored statements */ -#endif -}; - -/* -** A macro to discover the encoding of a database. -*/ -#define ENC(db) ((db)->aDb[0].pSchema->enc) - -/* -** Possible values for the sqlite.flags and or Db.flags fields. -** -** On sqlite.flags, the SQLITE_InTrans value means that we have -** executed a BEGIN. On Db.flags, SQLITE_InTrans means a statement -** transaction is active on that particular database file. -*/ -#define SQLITE_VdbeTrace 0x00000001 /* True to trace VDBE execution */ -#define SQLITE_InTrans 0x00000008 /* True if in a transaction */ -#define SQLITE_InternChanges 0x00000010 /* Uncommitted Hash table changes */ -#define SQLITE_FullColNames 0x00000020 /* Show full column names on SELECT */ -#define SQLITE_ShortColNames 0x00000040 /* Show short columns names */ -#define SQLITE_CountRows 0x00000080 /* Count rows changed by INSERT, */ - /* DELETE, or UPDATE and return */ - /* the count using a callback. */ -#define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */ - /* result set is empty */ -#define SQLITE_SqlTrace 0x00000200 /* Debug print SQL as it executes */ -#define SQLITE_VdbeListing 0x00000400 /* Debug listings of VDBE programs */ -#define SQLITE_WriteSchema 0x00000800 /* OK to update SQLITE_MASTER */ -#define SQLITE_NoReadlock 0x00001000 /* Readlocks are omitted when - ** accessing read-only databases */ -#define SQLITE_IgnoreChecks 0x00002000 /* Do not enforce check constraints */ -#define SQLITE_ReadUncommitted 0x00004000 /* For shared-cache mode */ -#define SQLITE_LegacyFileFmt 0x00008000 /* Create new databases in format 1 */ -#define SQLITE_FullFSync 0x00010000 /* Use full fsync on the backend */ -#define SQLITE_LoadExtension 0x00020000 /* Enable load_extension */ - -#define SQLITE_RecoveryMode 0x00040000 /* Ignore schema errors */ -#define SQLITE_SharedCache 0x00080000 /* Cache sharing is enabled */ -#define SQLITE_Vtab 0x00100000 /* There exists a virtual table */ - -/* -** Possible values for the sqlite.magic field. -** The numbers are obtained at random and have no special meaning, other -** than being distinct from one another. -*/ -#define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */ -#define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */ -#define SQLITE_MAGIC_SICK 0x4b771290 /* Error and awaiting close */ -#define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */ -#define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */ - -/* -** Each SQL function is defined by an instance of the following -** structure. A pointer to this structure is stored in the sqlite.aFunc -** hash table. When multiple functions have the same name, the hash table -** points to a linked list of these structures. -*/ -struct FuncDef { - i16 nArg; /* Number of arguments. -1 means unlimited */ - u8 iPrefEnc; /* Preferred text encoding (SQLITE_UTF8, 16LE, 16BE) */ - u8 needCollSeq; /* True if sqlite3GetFuncCollSeq() might be called */ - u8 flags; /* Some combination of SQLITE_FUNC_* */ - void *pUserData; /* User data parameter */ - FuncDef *pNext; /* Next function with same name */ - void (*xFunc)(sqlite3_context*,int,sqlite3_value**); /* Regular function */ - void (*xStep)(sqlite3_context*,int,sqlite3_value**); /* Aggregate step */ - void (*xFinalize)(sqlite3_context*); /* Aggregate finializer */ - char zName[1]; /* SQL name of the function. MUST BE LAST */ -}; - -/* -** Each SQLite module (virtual table definition) is defined by an -** instance of the following structure, stored in the sqlite3.aModule -** hash table. -*/ -struct Module { - const sqlite3_module *pModule; /* Callback pointers */ - const char *zName; /* Name passed to create_module() */ - void *pAux; /* pAux passed to create_module() */ - void (*xDestroy)(void *); /* Module destructor function */ -}; - -/* -** Possible values for FuncDef.flags -*/ -#define SQLITE_FUNC_LIKE 0x01 /* Candidate for the LIKE optimization */ -#define SQLITE_FUNC_CASE 0x02 /* Case-sensitive LIKE-type function */ -#define SQLITE_FUNC_EPHEM 0x04 /* Ephermeral. Delete with VDBE */ - -/* -** information about each column of an SQL table is held in an instance -** of this structure. -*/ -struct Column { - char *zName; /* Name of this column */ - Expr *pDflt; /* Default value of this column */ - char *zType; /* Data type for this column */ - char *zColl; /* Collating sequence. If NULL, use the default */ - u8 notNull; /* True if there is a NOT NULL constraint */ - u8 isPrimKey; /* True if this column is part of the PRIMARY KEY */ - char affinity; /* One of the SQLITE_AFF_... values */ -#ifndef SQLITE_OMIT_VIRTUALTABLE - u8 isHidden; /* True if this column is 'hidden' */ -#endif -}; - -/* -** A "Collating Sequence" is defined by an instance of the following -** structure. Conceptually, a collating sequence consists of a name and -** a comparison routine that defines the order of that sequence. -** -** There may two seperate implementations of the collation function, one -** that processes text in UTF-8 encoding (CollSeq.xCmp) and another that -** processes text encoded in UTF-16 (CollSeq.xCmp16), using the machine -** native byte order. When a collation sequence is invoked, SQLite selects -** the version that will require the least expensive encoding -** translations, if any. -** -** The CollSeq.pUser member variable is an extra parameter that passed in -** as the first argument to the UTF-8 comparison function, xCmp. -** CollSeq.pUser16 is the equivalent for the UTF-16 comparison function, -** xCmp16. -** -** If both CollSeq.xCmp and CollSeq.xCmp16 are NULL, it means that the -** collating sequence is undefined. Indices built on an undefined -** collating sequence may not be read or written. -*/ -struct CollSeq { - char *zName; /* Name of the collating sequence, UTF-8 encoded */ - u8 enc; /* Text encoding handled by xCmp() */ - u8 type; /* One of the SQLITE_COLL_... values below */ - void *pUser; /* First argument to xCmp() */ - int (*xCmp)(void*,int, const void*, int, const void*); - void (*xDel)(void*); /* Destructor for pUser */ -}; - -/* -** Allowed values of CollSeq flags: -*/ -#define SQLITE_COLL_BINARY 1 /* The default memcmp() collating sequence */ -#define SQLITE_COLL_NOCASE 2 /* The built-in NOCASE collating sequence */ -#define SQLITE_COLL_REVERSE 3 /* The built-in REVERSE collating sequence */ -#define SQLITE_COLL_USER 0 /* Any other user-defined collating sequence */ - -/* -** A sort order can be either ASC or DESC. -*/ -#define SQLITE_SO_ASC 0 /* Sort in ascending order */ -#define SQLITE_SO_DESC 1 /* Sort in ascending order */ - -/* -** Column affinity types. -** -** These used to have mnemonic name like 'i' for SQLITE_AFF_INTEGER and -** 't' for SQLITE_AFF_TEXT. But we can save a little space and improve -** the speed a little by number the values consecutively. -** -** But rather than start with 0 or 1, we begin with 'a'. That way, -** when multiple affinity types are concatenated into a string and -** used as the P4 operand, they will be more readable. -** -** Note also that the numeric types are grouped together so that testing -** for a numeric type is a single comparison. -*/ -#define SQLITE_AFF_TEXT 'a' -#define SQLITE_AFF_NONE 'b' -#define SQLITE_AFF_NUMERIC 'c' -#define SQLITE_AFF_INTEGER 'd' -#define SQLITE_AFF_REAL 'e' - -#define sqlite3IsNumericAffinity(X) ((X)>=SQLITE_AFF_NUMERIC) - -/* -** The SQLITE_AFF_MASK values masks off the significant bits of an -** affinity value. -*/ -#define SQLITE_AFF_MASK 0x67 - -/* -** Additional bit values that can be ORed with an affinity without -** changing the affinity. -*/ -#define SQLITE_JUMPIFNULL 0x08 /* jumps if either operand is NULL */ -#define SQLITE_NULLEQUAL 0x10 /* compare NULLs equal */ -#define SQLITE_STOREP2 0x80 /* Store result in reg[P2] rather than jump */ - -/* -** Each SQL table is represented in memory by an instance of the -** following structure. -** -** Table.zName is the name of the table. The case of the original -** CREATE TABLE statement is stored, but case is not significant for -** comparisons. -** -** Table.nCol is the number of columns in this table. Table.aCol is a -** pointer to an array of Column structures, one for each column. -** -** If the table has an INTEGER PRIMARY KEY, then Table.iPKey is the index of -** the column that is that key. Otherwise Table.iPKey is negative. Note -** that the datatype of the PRIMARY KEY must be INTEGER for this field to -** be set. An INTEGER PRIMARY KEY is used as the rowid for each row of -** the table. If a table has no INTEGER PRIMARY KEY, then a random rowid -** is generated for each row of the table. Table.hasPrimKey is true if -** the table has any PRIMARY KEY, INTEGER or otherwise. -** -** Table.tnum is the page number for the root BTree page of the table in the -** database file. If Table.iDb is the index of the database table backend -** in sqlite.aDb[]. 0 is for the main database and 1 is for the file that -** holds temporary tables and indices. If Table.isEphem -** is true, then the table is stored in a file that is automatically deleted -** when the VDBE cursor to the table is closed. In this case Table.tnum -** refers VDBE cursor number that holds the table open, not to the root -** page number. Transient tables are used to hold the results of a -** sub-query that appears instead of a real table name in the FROM clause -** of a SELECT statement. -*/ -struct Table { - char *zName; /* Name of the table */ - int nCol; /* Number of columns in this table */ - Column *aCol; /* Information about each column */ - int iPKey; /* If not less then 0, use aCol[iPKey] as the primary key */ - Index *pIndex; /* List of SQL indexes on this table. */ - int tnum; /* Root BTree node for this table (see note above) */ - Select *pSelect; /* NULL for tables. Points to definition if a view. */ - int nRef; /* Number of pointers to this Table */ - Trigger *pTrigger; /* List of SQL triggers on this table */ - FKey *pFKey; /* Linked list of all foreign keys in this table */ - char *zColAff; /* String defining the affinity of each column */ -#ifndef SQLITE_OMIT_CHECK - Expr *pCheck; /* The AND of all CHECK constraints */ -#endif -#ifndef SQLITE_OMIT_ALTERTABLE - int addColOffset; /* Offset in CREATE TABLE statement to add a new column */ -#endif - u8 readOnly; /* True if this table should not be written by the user */ - u8 isEphem; /* True if created using OP_OpenEphermeral */ - u8 hasPrimKey; /* True if there exists a primary key */ - u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */ - u8 autoInc; /* True if the integer primary key is autoincrement */ -#ifndef SQLITE_OMIT_VIRTUALTABLE - u8 isVirtual; /* True if this is a virtual table */ - u8 isCommit; /* True once the CREATE TABLE has been committed */ - Module *pMod; /* Pointer to the implementation of the module */ - sqlite3_vtab *pVtab; /* Pointer to the module instance */ - int nModuleArg; /* Number of arguments to the module */ - char **azModuleArg; /* Text of all module args. [0] is module name */ -#endif - Schema *pSchema; /* Schema that contains this table */ -}; - -/* -** Test to see whether or not a table is a virtual table. This is -** done as a macro so that it will be optimized out when virtual -** table support is omitted from the build. -*/ -#ifndef SQLITE_OMIT_VIRTUALTABLE -# define IsVirtual(X) ((X)->isVirtual) -# define IsHiddenColumn(X) ((X)->isHidden) -#else -# define IsVirtual(X) 0 -# define IsHiddenColumn(X) 0 -#endif - -/* -** Each foreign key constraint is an instance of the following structure. -** -** A foreign key is associated with two tables. The "from" table is -** the table that contains the REFERENCES clause that creates the foreign -** key. The "to" table is the table that is named in the REFERENCES clause. -** Consider this example: -** -** CREATE TABLE ex1( -** a INTEGER PRIMARY KEY, -** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x) -** ); -** -** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2". -** -** Each REFERENCES clause generates an instance of the following structure -** which is attached to the from-table. The to-table need not exist when -** the from-table is created. The existance of the to-table is not checked -** until an attempt is made to insert data into the from-table. -** -** The sqlite.aFKey hash table stores pointers to this structure -** given the name of a to-table. For each to-table, all foreign keys -** associated with that table are on a linked list using the FKey.pNextTo -** field. -*/ -struct FKey { - Table *pFrom; /* The table that constains the REFERENCES clause */ - FKey *pNextFrom; /* Next foreign key in pFrom */ - char *zTo; /* Name of table that the key points to */ - FKey *pNextTo; /* Next foreign key that points to zTo */ - int nCol; /* Number of columns in this key */ - struct sColMap { /* Mapping of columns in pFrom to columns in zTo */ - int iFrom; /* Index of column in pFrom */ - char *zCol; /* Name of column in zTo. If 0 use PRIMARY KEY */ - } *aCol; /* One entry for each of nCol column s */ - u8 isDeferred; /* True if constraint checking is deferred till COMMIT */ - u8 updateConf; /* How to resolve conflicts that occur on UPDATE */ - u8 deleteConf; /* How to resolve conflicts that occur on DELETE */ - u8 insertConf; /* How to resolve conflicts that occur on INSERT */ -}; - -/* -** SQLite supports many different ways to resolve a constraint -** error. ROLLBACK processing means that a constraint violation -** causes the operation in process to fail and for the current transaction -** to be rolled back. ABORT processing means the operation in process -** fails and any prior changes from that one operation are backed out, -** but the transaction is not rolled back. FAIL processing means that -** the operation in progress stops and returns an error code. But prior -** changes due to the same operation are not backed out and no rollback -** occurs. IGNORE means that the particular row that caused the constraint -** error is not inserted or updated. Processing continues and no error -** is returned. REPLACE means that preexisting database rows that caused -** a UNIQUE constraint violation are removed so that the new insert or -** update can proceed. Processing continues and no error is reported. -** -** RESTRICT, SETNULL, and CASCADE actions apply only to foreign keys. -** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the -** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign -** key is set to NULL. CASCADE means that a DELETE or UPDATE of the -** referenced table row is propagated into the row that holds the -** foreign key. -** -** The following symbolic values are used to record which type -** of action to take. -*/ -#define OE_None 0 /* There is no constraint to check */ -#define OE_Rollback 1 /* Fail the operation and rollback the transaction */ -#define OE_Abort 2 /* Back out changes but do no rollback transaction */ -#define OE_Fail 3 /* Stop the operation but leave all prior changes */ -#define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */ -#define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */ - -#define OE_Restrict 6 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */ -#define OE_SetNull 7 /* Set the foreign key value to NULL */ -#define OE_SetDflt 8 /* Set the foreign key value to its default */ -#define OE_Cascade 9 /* Cascade the changes */ - -#define OE_Default 99 /* Do whatever the default action is */ - - -/* -** An instance of the following structure is passed as the first -** argument to sqlite3VdbeKeyCompare and is used to control the -** comparison of the two index keys. -** -** If the KeyInfo.incrKey value is true and the comparison would -** otherwise be equal, then return a result as if the second key -** were larger. -*/ -struct KeyInfo { - sqlite3 *db; /* The database connection */ - u8 enc; /* Text encoding - one of the TEXT_Utf* values */ - u8 incrKey; /* Increase 2nd key by epsilon before comparison */ - u8 prefixIsEqual; /* Treat a prefix as equal */ - int nField; /* Number of entries in aColl[] */ - u8 *aSortOrder; /* If defined an aSortOrder[i] is true, sort DESC */ - CollSeq *aColl[1]; /* Collating sequence for each term of the key */ -}; - -/* -** Each SQL index is represented in memory by an -** instance of the following structure. -** -** The columns of the table that are to be indexed are described -** by the aiColumn[] field of this structure. For example, suppose -** we have the following table and index: -** -** CREATE TABLE Ex1(c1 int, c2 int, c3 text); -** CREATE INDEX Ex2 ON Ex1(c3,c1); -** -** In the Table structure describing Ex1, nCol==3 because there are -** three columns in the table. In the Index structure describing -** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed. -** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the -** first column to be indexed (c3) has an index of 2 in Ex1.aCol[]. -** The second column to be indexed (c1) has an index of 0 in -** Ex1.aCol[], hence Ex2.aiColumn[1]==0. -** -** The Index.onError field determines whether or not the indexed columns -** must be unique and what to do if they are not. When Index.onError=OE_None, -** it means this is not a unique index. Otherwise it is a unique index -** and the value of Index.onError indicate the which conflict resolution -** algorithm to employ whenever an attempt is made to insert a non-unique -** element. -*/ -struct Index { - char *zName; /* Name of this index */ - int nColumn; /* Number of columns in the table used by this index */ - int *aiColumn; /* Which columns are used by this index. 1st is 0 */ - unsigned *aiRowEst; /* Result of ANALYZE: Est. rows selected by each column */ - Table *pTable; /* The SQL table being indexed */ - int tnum; /* Page containing root of this index in database file */ - u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */ - u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */ - char *zColAff; /* String defining the affinity of each column */ - Index *pNext; /* The next index associated with the same table */ - Schema *pSchema; /* Schema containing this index */ - u8 *aSortOrder; /* Array of size Index.nColumn. True==DESC, False==ASC */ - char **azColl; /* Array of collation sequence names for index */ -}; - -/* -** Each token coming out of the lexer is an instance of -** this structure. Tokens are also used as part of an expression. -** -** Note if Token.z==0 then Token.dyn and Token.n are undefined and -** may contain random values. Do not make any assuptions about Token.dyn -** and Token.n when Token.z==0. -*/ -struct Token { - const unsigned char *z; /* Text of the token. Not NULL-terminated! */ - unsigned dyn : 1; /* True for malloced memory, false for static */ - unsigned n : 31; /* Number of characters in this token */ -}; - -/* -** An instance of this structure contains information needed to generate -** code for a SELECT that contains aggregate functions. -** -** If Expr.op==TK_AGG_COLUMN or TK_AGG_FUNCTION then Expr.pAggInfo is a -** pointer to this structure. The Expr.iColumn field is the index in -** AggInfo.aCol[] or AggInfo.aFunc[] of information needed to generate -** code for that node. -** -** AggInfo.pGroupBy and AggInfo.aFunc.pExpr point to fields within the -** original Select structure that describes the SELECT statement. These -** fields do not need to be freed when deallocating the AggInfo structure. -*/ -struct AggInfo { - u8 directMode; /* Direct rendering mode means take data directly - ** from source tables rather than from accumulators */ - u8 useSortingIdx; /* In direct mode, reference the sorting index rather - ** than the source table */ - int sortingIdx; /* Cursor number of the sorting index */ - ExprList *pGroupBy; /* The group by clause */ - int nSortingColumn; /* Number of columns in the sorting index */ - struct AggInfo_col { /* For each column used in source tables */ - Table *pTab; /* Source table */ - int iTable; /* Cursor number of the source table */ - int iColumn; /* Column number within the source table */ - int iSorterColumn; /* Column number in the sorting index */ - int iMem; /* Memory location that acts as accumulator */ - Expr *pExpr; /* The original expression */ - } *aCol; - int nColumn; /* Number of used entries in aCol[] */ - int nColumnAlloc; /* Number of slots allocated for aCol[] */ - int nAccumulator; /* Number of columns that show through to the output. - ** Additional columns are used only as parameters to - ** aggregate functions */ - struct AggInfo_func { /* For each aggregate function */ - Expr *pExpr; /* Expression encoding the function */ - FuncDef *pFunc; /* The aggregate function implementation */ - int iMem; /* Memory location that acts as accumulator */ - int iDistinct; /* Ephermeral table used to enforce DISTINCT */ - } *aFunc; - int nFunc; /* Number of entries in aFunc[] */ - int nFuncAlloc; /* Number of slots allocated for aFunc[] */ -}; - -/* -** Each node of an expression in the parse tree is an instance -** of this structure. -** -** Expr.op is the opcode. The integer parser token codes are reused -** as opcodes here. For example, the parser defines TK_GE to be an integer -** code representing the ">=" operator. This same integer code is reused -** to represent the greater-than-or-equal-to operator in the expression -** tree. -** -** Expr.pRight and Expr.pLeft are subexpressions. Expr.pList is a list -** of argument if the expression is a function. -** -** Expr.token is the operator token for this node. For some expressions -** that have subexpressions, Expr.token can be the complete text that gave -** rise to the Expr. In the latter case, the token is marked as being -** a compound token. -** -** An expression of the form ID or ID.ID refers to a column in a table. -** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is -** the integer cursor number of a VDBE cursor pointing to that table and -** Expr.iColumn is the column number for the specific column. If the -** expression is used as a result in an aggregate SELECT, then the -** value is also stored in the Expr.iAgg column in the aggregate so that -** it can be accessed after all aggregates are computed. -** -** If the expression is a function, the Expr.iTable is an integer code -** representing which function. If the expression is an unbound variable -** marker (a question mark character '?' in the original SQL) then the -** Expr.iTable holds the index number for that variable. -** -** If the expression is a subquery then Expr.iColumn holds an integer -** register number containing the result of the subquery. If the -** subquery gives a constant result, then iTable is -1. If the subquery -** gives a different answer at different times during statement processing -** then iTable is the address of a subroutine that computes the subquery. -** -** The Expr.pSelect field points to a SELECT statement. The SELECT might -** be the right operand of an IN operator. Or, if a scalar SELECT appears -** in an expression the opcode is TK_SELECT and Expr.pSelect is the only -** operand. -** -** If the Expr is of type OP_Column, and the table it is selecting from -** is a disk table or the "old.*" pseudo-table, then pTab points to the -** corresponding table definition. -*/ -struct Expr { - u8 op; /* Operation performed by this node */ - char affinity; /* The affinity of the column or 0 if not a column */ - u16 flags; /* Various flags. See below */ - CollSeq *pColl; /* The collation type of the column or 0 */ - Expr *pLeft, *pRight; /* Left and right subnodes */ - ExprList *pList; /* A list of expressions used as function arguments - ** or in " IN (aCol[] or ->aFunc[] */ - int iRightJoinTable; /* If EP_FromJoin, the right table of the join */ - Select *pSelect; /* When the expression is a sub-select. Also the - ** right side of " IN (