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Overview
Comment:Add the sqlite3_clear_bindings() API to the loadable extension interface. Ticket #2135. (CVS 3752)
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SHA1: 3111b43ec333f3342f9609bf441160040f3d1501
User & Date: drh 2007-03-29 18:46:01.000
Context
2007-03-29
20:13
Fix to token destructors in Lemon. This does not impact SQLite. Ticket #2175. (CVS 3753) (check-in: 6195af4982 user: drh tags: trunk)
18:46
Add the sqlite3_clear_bindings() API to the loadable extension interface. Ticket #2135. (CVS 3752) (check-in: 3111b43ec3 user: drh tags: trunk)
18:41
Buffer updates per-transaction rather than per-update. If lots of updates happen within a single transaction, there was a lot of wasted encode/decode overhead due to segment merges. This code buffers updates in memory and writes out larger level-0 segments. It only works when documents are presented in ascending order by docid. Comparing a test set running 100 documents per transaction, the total runtime is cut almost in half. (CVS 3751) (check-in: 0229cba696 user: shess tags: trunk)
Changes
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Changes to src/loadext.c.
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  sqlite3_overload_function,

  /*
  ** Added after 3.3.13
  */
  sqlite3_prepare_v2,
  sqlite3_prepare16_v2,
  sqlite3_clear_bindings,
};

/*
** Attempt to load an SQLite extension library contained in the file
** zFile.  The entry point is zProc.  zProc may be 0 in which case a
** default entry point name (sqlite3_extension_init) is used.  Use
** of the default name is recommended.
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Changes to src/sqlite3ext.h.
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*************************************************************************
** This header file defines the SQLite interface for use by
** shared libraries that want to be imported as extensions into
** an SQLite instance.  Shared libraries that intend to be loaded
** as extensions by SQLite should #include this file instead of 
** sqlite3.h.
**
** @(#) $Id: sqlite3ext.h,v 1.9 2007/03/25 19:08:47 drh Exp $
** @(#) $Id: sqlite3ext.h,v 1.10 2007/03/29 18:46:01 drh Exp $
*/
#ifndef _SQLITE3EXT_H_
#define _SQLITE3EXT_H_
#include "sqlite3.h"

typedef struct sqlite3_api_routines sqlite3_api_routines;
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  sqlite_int64  (*value_int64)(sqlite3_value*);
  int  (*value_numeric_type)(sqlite3_value*);
  const unsigned char * (*value_text)(sqlite3_value*);
  const void * (*value_text16)(sqlite3_value*);
  const void * (*value_text16be)(sqlite3_value*);
  const void * (*value_text16le)(sqlite3_value*);
  int  (*value_type)(sqlite3_value*);
  char * (*vmprintf)(const char*,va_list);
  char *(*vmprintf)(const char*,va_list);
  int (*overload_function)(sqlite3*, const char *zFuncName, int nArg);
  int  (*prepare_v2)(sqlite3*,const char*,int,sqlite3_stmt**,const char**);
  int  (*prepare16_v2)(sqlite3*,const void*,int,sqlite3_stmt**,const void**);
  int (*prepare_v2)(sqlite3*,const char*,int,sqlite3_stmt**,const char**);
  int (*prepare16_v2)(sqlite3*,const void*,int,sqlite3_stmt**,const void**);
  int (*clear_bindings)(sqlite3_stmt*);
};

/*
** The following macros redefine the API routines so that they are
** redirected throught the global sqlite3_api structure.
**
** This header file is also used by the loadext.c source file
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#define sqlite3_value_text             sqlite3_api->value_text
#define sqlite3_value_text16           sqlite3_api->value_text16
#define sqlite3_value_text16be         sqlite3_api->value_text16be
#define sqlite3_value_text16le         sqlite3_api->value_text16le
#define sqlite3_value_type             sqlite3_api->value_type
#define sqlite3_vmprintf               sqlite3_api->vmprintf
#define sqlite3_overload_function      sqlite3_api->overload_function
#define sqlite3_prepare_v2             sqlite3_api->prepare_v2
#define sqlite3_prepare16_v2           sqlite3_api->prepare16_v2
#define sqlite3_clear_bindings         sqlite3_api->clear_bindings
#endif /* SQLITE_CORE */

#define SQLITE_EXTENSION_INIT1     const sqlite3_api_routines *sqlite3_api;
#define SQLITE_EXTENSION_INIT2(v)  sqlite3_api = v;

#endif /* _SQLITE3EXT_H_ */