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Overview
Comment:Partial fix for ticket #96: Return SQLITE_MISUSE from sqlite_exec() if called from a child process with an active transaction that was started in the parent. (CVS 675)
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SHA1: 72a609ec6492e7d740b6e6184fa14a5e6b04a5dc
User & Date: drh 2002-07-13 17:23:21
Context
2002-07-13
17:33
Fix for ticket #64: Better error reporting in the shell. (CVS 676) (check-in: e1842e04 user: drh tags: trunk)
17:23
Partial fix for ticket #96: Return SQLITE_MISUSE from sqlite_exec() if called from a child process with an active transaction that was started in the parent. (CVS 675) (check-in: 72a609ec user: drh tags: trunk)
17:18
Fix for ticket #99: Added documentation on the sqlite_mprintf() API. (CVS 674) (check-in: d918de5f user: drh tags: trunk)
Changes
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Changes to src/build.c. 

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**     COPY
**     VACUUM
**     BEGIN TRANSACTION
**     COMMIT
**     ROLLBACK
**     PRAGMA
**
** $Id: build.c,v 1.104 2002/07/13 03:11:53 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** This routine is called when a new SQL statement is beginning to
** be parsed.  Check to see if the schema for the database needs
................................................................................
  sqlite *db;

  if( pParse==0 || (db=pParse->db)==0 || db->pBe==0 ) return;
  if( pParse->nErr || sqlite_malloc_failed ) return;
  if( db->flags & SQLITE_InTrans ) return;
  sqliteBeginWriteOperation(pParse, 0);
  db->flags |= SQLITE_InTrans;

  db->onError = onError;
}

/*
** Commit a transaction
*/
void sqliteCommitTransaction(Parse *pParse){








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**     COPY
**     VACUUM
**     BEGIN TRANSACTION
**     COMMIT
**     ROLLBACK
**     PRAGMA
**
** $Id: build.c,v 1.105 2002/07/13 17:23:21 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** This routine is called when a new SQL statement is beginning to
** be parsed.  Check to see if the schema for the database needs
................................................................................
  sqlite *db;

  if( pParse==0 || (db=pParse->db)==0 || db->pBe==0 ) return;
  if( pParse->nErr || sqlite_malloc_failed ) return;
  if( db->flags & SQLITE_InTrans ) return;
  sqliteBeginWriteOperation(pParse, 0);
  db->flags |= SQLITE_InTrans;
  db->pid = sqliteOsProcessId();
  db->onError = onError;
}

/*
** Commit a transaction
*/
void sqliteCommitTransaction(Parse *pParse){

Changes to src/main.c. 

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**
*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: main.c,v 1.85 2002/06/25 19:31:18 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>

/*
** This is the callback routine for the code that initializes the
................................................................................
  void *pArg,                 /* First argument to xCallback() */
  char **pzErrMsg             /* Write error messages here */
){
  Parse sParse;

  if( pzErrMsg ) *pzErrMsg = 0;
  if( sqliteSafetyOn(db) ) goto exec_misuse;



  if( (db->flags & SQLITE_Initialized)==0 ){
    int rc = sqliteInit(db, pzErrMsg);
    if( rc!=SQLITE_OK ){
      sqliteStrRealloc(pzErrMsg);
      sqliteSafetyOff(db);
      return rc;
    }








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**
*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: main.c,v 1.86 2002/07/13 17:23:21 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>

/*
** This is the callback routine for the code that initializes the
................................................................................
  void *pArg,                 /* First argument to xCallback() */
  char **pzErrMsg             /* Write error messages here */
){
  Parse sParse;

  if( pzErrMsg ) *pzErrMsg = 0;
  if( sqliteSafetyOn(db) ) goto exec_misuse;
  if( (db->flags & SQLITE_InTrans)!=0 && db->pid!=sqliteOsProcessId() ){
    goto exec_misuse;
  }
  if( (db->flags & SQLITE_Initialized)==0 ){
    int rc = sqliteInit(db, pzErrMsg);
    if( rc!=SQLITE_OK ){
      sqliteStrRealloc(pzErrMsg);
      sqliteSafetyOff(db);
      return rc;
    }

Changes to src/os.c. 

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#endif
#if OS_WIN
  SimulateIOError(SQLITE_IOERR);
  *pSize = GetFileSize(id->h, 0);
  return SQLITE_OK;
#endif
}















/*
** Change the status of the lock on the file "id" to be a readlock.
** If the file was write locked, then this reduces the lock to a read.
** If the file was read locked, then this acquires a new read lock.
**








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#endif
#if OS_WIN
  SimulateIOError(SQLITE_IOERR);
  *pSize = GetFileSize(id->h, 0);
  return SQLITE_OK;
#endif
}

/*
** Return the process ID for the current process.  This
** only works under Unix.  Under windows, a constant is returned.
*/
int sqliteOsProcessId(void){
#if OS_UNIX
  return getpid();
#endif
#if OS_WIN
  return 1;
#endif
}


/*
** Change the status of the lock on the file "id" to be a readlock.
** If the file was write locked, then this reduces the lock to a read.
** If the file was read locked, then this acquires a new read lock.
**

Changes to src/os.h. 

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int sqliteOsTruncate(OsFile*, int size);
int sqliteOsFileSize(OsFile*, int *pSize);
int sqliteOsReadLock(OsFile*);
int sqliteOsWriteLock(OsFile*);
int sqliteOsUnlock(OsFile*);
int sqliteOsRandomSeed(char*);
int sqliteOsSleep(int ms);

void sqliteOsEnterMutex(void);
void sqliteOsLeaveMutex(void);



#endif /* _SQLITE_OS_H_ */








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int sqliteOsTruncate(OsFile*, int size);
int sqliteOsFileSize(OsFile*, int *pSize);
int sqliteOsReadLock(OsFile*);
int sqliteOsWriteLock(OsFile*);
int sqliteOsUnlock(OsFile*);
int sqliteOsRandomSeed(char*);
int sqliteOsSleep(int ms);
int sqliteOsProcessId(void);
void sqliteOsEnterMutex(void);
void sqliteOsLeaveMutex(void);



#endif /* _SQLITE_OS_H_ */

Changes to src/sqliteInt.h. 

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**    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 1.137 2002/07/13 03:11:54 drh Exp $
*/
#include "sqlite.h"
#include "hash.h"
#include "vdbe.h"
#include "parse.h"
#include "btree.h"
#include <stdio.h>
................................................................................
  Btree *pBeTemp;               /* Backend for session temporary tables */
  int flags;                    /* Miscellanous flags. See below */
  int file_format;              /* What file format version is this database? */
  int schema_cookie;            /* Magic number that changes with the schema */
  int next_cookie;              /* Value of schema_cookie after commit */
  int cache_size;               /* Number of pages to use in the cache */
  int nTable;                   /* Number of tables in the database */

  void *pBusyArg;               /* 1st Argument to the busy callback */
  int (*xBusyCallback)(void *,const char*,int);  /* The busy callback */
  Hash tblHash;                 /* All tables indexed by name */
  Hash idxHash;                 /* All (named) indices indexed by name */
  Hash trigHash;                /* All triggers indexed by name */
  Hash aFunc;                   /* All functions that can be in SQL exprs */
  int lastRowid;                /* ROWID of most recent insert */








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**    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 1.138 2002/07/13 17:23:21 drh Exp $
*/
#include "sqlite.h"
#include "hash.h"
#include "vdbe.h"
#include "parse.h"
#include "btree.h"
#include <stdio.h>
................................................................................
  Btree *pBeTemp;               /* Backend for session temporary tables */
  int flags;                    /* Miscellanous flags. See below */
  int file_format;              /* What file format version is this database? */
  int schema_cookie;            /* Magic number that changes with the schema */
  int next_cookie;              /* Value of schema_cookie after commit */
  int cache_size;               /* Number of pages to use in the cache */
  int nTable;                   /* Number of tables in the database */
  int pid;                      /* Process ID that started the transaction */
  void *pBusyArg;               /* 1st Argument to the busy callback */
  int (*xBusyCallback)(void *,const char*,int);  /* The busy callback */
  Hash tblHash;                 /* All tables indexed by name */
  Hash idxHash;                 /* All (named) indices indexed by name */
  Hash trigHash;                /* All triggers indexed by name */
  Hash aFunc;                   /* All functions that can be in SQL exprs */
  int lastRowid;                /* ROWID of most recent insert */

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