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Overview
Comment:Fix the max_page_count pragma so that it will not set to a value smaller than the current database size, as the documentation requires. Also, remove all occurances of atoi() from the core.
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SHA1: 2031974b606ef713b5f34522b2221470d98687c5
User & Date: drh 2010-11-23 18:59:28.000
Context
2010-11-23
20:25
The previous check-in with changes to the max_page_count pragma was not quite correct. This check-in fixes the problem. (check-in: 30c26c3b13 user: drh tags: trunk)
18:59
Fix the max_page_count pragma so that it will not set to a value smaller than the current database size, as the documentation requires. Also, remove all occurances of atoi() from the core. (check-in: 2031974b60 user: drh tags: trunk)
2010-11-22
17:26
Fix a typo in unixCurrentTimeInt64() preventing compilation with NO_GETTOD defined. (check-in: 3df3e79b56 user: dan tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/pragma.c.
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                             /* 123456789 123456789 */
  static const char zText[] = "onoffalseyestruefull";
  static const u8 iOffset[] = {0, 1, 2, 4, 9, 12, 16};
  static const u8 iLength[] = {2, 2, 3, 5, 3, 4, 4};
  static const u8 iValue[] =  {1, 0, 0, 0, 1, 1, 2};
  int i, n;
  if( sqlite3Isdigit(*z) ){
    return (u8)atoi(z);
  }
  n = sqlite3Strlen30(z);
  for(i=0; i<ArraySize(iLength); i++){
    if( iLength[i]==n && sqlite3StrNICmp(&zText[iOffset[i]],z,n)==0 ){
      return iValue[i];
    }
  }







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                             /* 123456789 123456789 */
  static const char zText[] = "onoffalseyestruefull";
  static const u8 iOffset[] = {0, 1, 2, 4, 9, 12, 16};
  static const u8 iLength[] = {2, 2, 3, 5, 3, 4, 4};
  static const u8 iValue[] =  {1, 0, 0, 0, 1, 1, 2};
  int i, n;
  if( sqlite3Isdigit(*z) ){
    return (u8)sqlite3Atoi(z);
  }
  n = sqlite3Strlen30(z);
  for(i=0; i<ArraySize(iLength); i++){
    if( iLength[i]==n && sqlite3StrNICmp(&zText[iOffset[i]],z,n)==0 ){
      return iValue[i];
    }
  }
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** acceptable, as are their numeric equivalents: 0, 1 and 2 respectively.
*/
static int getAutoVacuum(const char *z){
  int i;
  if( 0==sqlite3StrICmp(z, "none") ) return BTREE_AUTOVACUUM_NONE;
  if( 0==sqlite3StrICmp(z, "full") ) return BTREE_AUTOVACUUM_FULL;
  if( 0==sqlite3StrICmp(z, "incremental") ) return BTREE_AUTOVACUUM_INCR;
  i = atoi(z);
  return (u8)((i>=0&&i<=2)?i:0);
}
#endif /* ifndef SQLITE_OMIT_AUTOVACUUM */

#ifndef SQLITE_OMIT_PAGER_PRAGMAS
/*
** Interpret the given string as a temp db location. Return 1 for file







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** acceptable, as are their numeric equivalents: 0, 1 and 2 respectively.
*/
static int getAutoVacuum(const char *z){
  int i;
  if( 0==sqlite3StrICmp(z, "none") ) return BTREE_AUTOVACUUM_NONE;
  if( 0==sqlite3StrICmp(z, "full") ) return BTREE_AUTOVACUUM_FULL;
  if( 0==sqlite3StrICmp(z, "incremental") ) return BTREE_AUTOVACUUM_INCR;
  i = sqlite3Atoi(z);
  return (u8)((i>=0&&i<=2)?i:0);
}
#endif /* ifndef SQLITE_OMIT_AUTOVACUUM */

#ifndef SQLITE_OMIT_PAGER_PRAGMAS
/*
** Interpret the given string as a temp db location. Return 1 for file
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      sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "cache_size", SQLITE_STATIC);
      pParse->nMem += 2;
      addr = sqlite3VdbeAddOpList(v, ArraySize(getCacheSize), getCacheSize);
      sqlite3VdbeChangeP1(v, addr, iDb);
      sqlite3VdbeChangeP1(v, addr+1, iDb);
      sqlite3VdbeChangeP1(v, addr+6, SQLITE_DEFAULT_CACHE_SIZE);
    }else{
      int size = atoi(zRight);
      if( size<0 ) size = -size;
      sqlite3BeginWriteOperation(pParse, 0, iDb);
      sqlite3VdbeAddOp2(v, OP_Integer, size, 1);
      sqlite3VdbeAddOp3(v, OP_SetCookie, iDb, BTREE_DEFAULT_CACHE_SIZE, 1);
      pDb->pSchema->cache_size = size;
      sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
    }







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      sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "cache_size", SQLITE_STATIC);
      pParse->nMem += 2;
      addr = sqlite3VdbeAddOpList(v, ArraySize(getCacheSize), getCacheSize);
      sqlite3VdbeChangeP1(v, addr, iDb);
      sqlite3VdbeChangeP1(v, addr+1, iDb);
      sqlite3VdbeChangeP1(v, addr+6, SQLITE_DEFAULT_CACHE_SIZE);
    }else{
      int size = sqlite3Atoi(zRight);
      if( size<0 ) size = -size;
      sqlite3BeginWriteOperation(pParse, 0, iDb);
      sqlite3VdbeAddOp2(v, OP_Integer, size, 1);
      sqlite3VdbeAddOp3(v, OP_SetCookie, iDb, BTREE_DEFAULT_CACHE_SIZE, 1);
      pDb->pSchema->cache_size = size;
      sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
    }
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    if( !zRight ){
      int size = ALWAYS(pBt) ? sqlite3BtreeGetPageSize(pBt) : 0;
      returnSingleInt(pParse, "page_size", size);
    }else{
      /* Malloc may fail when setting the page-size, as there is an internal
      ** buffer that the pager module resizes using sqlite3_realloc().
      */
      db->nextPagesize = atoi(zRight);
      if( SQLITE_NOMEM==sqlite3BtreeSetPageSize(pBt, db->nextPagesize, -1, 0) ){
        db->mallocFailed = 1;
      }
    }
  }else

  /*
  **  PRAGMA [database.]max_page_count
  **  PRAGMA [database.]max_page_count=N
  **
  ** The first form reports the current setting for the
  ** maximum number of pages in the database file.  The 
  ** second form attempts to change this setting.  Both
  ** forms return the current setting.
  */
  if( sqlite3StrICmp(zLeft,"max_page_count")==0 ){
    Btree *pBt = pDb->pBt;
    int newMax = 0;
    assert( pBt!=0 );
    if( zRight ){
      newMax = atoi(zRight);
    }
    if( ALWAYS(pBt) ){
      newMax = sqlite3BtreeMaxPageCount(pBt, newMax);
    }
    returnSingleInt(pParse, "max_page_count", newMax);
  }else

  /*
  **  PRAGMA [database.]secure_delete
  **  PRAGMA [database.]secure_delete=ON/OFF
  **
  ** The first form reports the current setting for the
  ** secure_delete flag.  The second form changes the secure_delete
  ** flag setting and reports thenew value.







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    if( !zRight ){
      int size = ALWAYS(pBt) ? sqlite3BtreeGetPageSize(pBt) : 0;
      returnSingleInt(pParse, "page_size", size);
    }else{
      /* Malloc may fail when setting the page-size, as there is an internal
      ** buffer that the pager module resizes using sqlite3_realloc().
      */
      db->nextPagesize = sqlite3Atoi(zRight);
      if( SQLITE_NOMEM==sqlite3BtreeSetPageSize(pBt, db->nextPagesize, -1, 0) ){
        db->mallocFailed = 1;
      }
    }
  }else























  /*
  **  PRAGMA [database.]secure_delete
  **  PRAGMA [database.]secure_delete=ON/OFF
  **
  ** The first form reports the current setting for the
  ** secure_delete flag.  The second form changes the secure_delete
  ** flag setting and reports thenew value.
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      }
    }
    b = sqlite3BtreeSecureDelete(pBt, b);
    returnSingleInt(pParse, "secure_delete", b);
  }else

  /*








  **  PRAGMA [database.]page_count
  **
  ** Return the number of pages in the specified database.
  */
  if( sqlite3StrICmp(zLeft,"page_count")==0 ){


    int iReg;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    sqlite3CodeVerifySchema(pParse, iDb);
    iReg = ++pParse->nMem;

    sqlite3VdbeAddOp2(v, OP_Pagecount, iDb, iReg);



    sqlite3VdbeAddOp2(v, OP_ResultRow, iReg, 1);
    sqlite3VdbeSetNumCols(v, 1);
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "page_count", SQLITE_STATIC);
  }else

  /*
  **  PRAGMA [database.]locking_mode
  **  PRAGMA [database.]locking_mode = (normal|exclusive)
  */
  if( sqlite3StrICmp(zLeft,"locking_mode")==0 ){







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      }
    }
    b = sqlite3BtreeSecureDelete(pBt, b);
    returnSingleInt(pParse, "secure_delete", b);
  }else

  /*
  **  PRAGMA [database.]max_page_count
  **  PRAGMA [database.]max_page_count=N
  **
  ** The first form reports the current setting for the
  ** maximum number of pages in the database file.  The 
  ** second form attempts to change this setting.  Both
  ** forms return the current setting.
  **
  **  PRAGMA [database.]page_count
  **
  ** Return the number of pages in the specified database.
  */
  if( sqlite3StrICmp(zLeft,"page_count")==0
   || sqlite3StrICmp(zLeft,"max_page_count")==0
  ){
    int iReg;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    sqlite3CodeVerifySchema(pParse, iDb);
    iReg = ++pParse->nMem;
    if( zLeft[0]=='p' ){
      sqlite3VdbeAddOp2(v, OP_Pagecount, iDb, iReg);
    }else{
      sqlite3VdbeAddOp3(v, OP_MaxPgcnt, iDb, iReg, sqlite3Atoi(zRight));
    }
    sqlite3VdbeAddOp2(v, OP_ResultRow, iReg, 1);
    sqlite3VdbeSetNumCols(v, 1);
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLeft, SQLITE_TRANSIENT);
  }else

  /*
  **  PRAGMA [database.]locking_mode
  **  PRAGMA [database.]locking_mode = (normal|exclusive)
  */
  if( sqlite3StrICmp(zLeft,"locking_mode")==0 ){
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  ** N should be a positive integer.
  */
  if( sqlite3StrICmp(zLeft,"cache_size")==0 ){
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    if( !zRight ){
      returnSingleInt(pParse, "cache_size", pDb->pSchema->cache_size);
    }else{
      int size = atoi(zRight);
      if( size<0 ) size = -size;
      pDb->pSchema->cache_size = size;
      sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
    }
  }else

  /*







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  ** N should be a positive integer.
  */
  if( sqlite3StrICmp(zLeft,"cache_size")==0 ){
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    if( !zRight ){
      returnSingleInt(pParse, "cache_size", pDb->pSchema->cache_size);
    }else{
      int size = sqlite3Atoi(zRight);
      if( size<0 ) size = -size;
      pDb->pSchema->cache_size = size;
      sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
    }
  }else

  /*
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    pParse->nMem = 6;
    sqlite3VdbeSetNumCols(v, 1);
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "integrity_check", SQLITE_STATIC);

    /* Set the maximum error count */
    mxErr = SQLITE_INTEGRITY_CHECK_ERROR_MAX;
    if( zRight ){
      mxErr = atoi(zRight);
      if( mxErr<=0 ){
        mxErr = SQLITE_INTEGRITY_CHECK_ERROR_MAX;
      }
    }
    sqlite3VdbeAddOp2(v, OP_Integer, mxErr, 1);  /* reg[1] holds errors left */

    /* Do an integrity check on each database file */







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    pParse->nMem = 6;
    sqlite3VdbeSetNumCols(v, 1);
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "integrity_check", SQLITE_STATIC);

    /* Set the maximum error count */
    mxErr = SQLITE_INTEGRITY_CHECK_ERROR_MAX;
    if( zRight ){
      sqlite3GetInt32(zRight, &mxErr);
      if( mxErr<=0 ){
        mxErr = SQLITE_INTEGRITY_CHECK_ERROR_MAX;
      }
    }
    sqlite3VdbeAddOp2(v, OP_Integer, mxErr, 1);  /* reg[1] holds errors left */

    /* Do an integrity check on each database file */
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      static const VdbeOpList setCookie[] = {
        { OP_Transaction,    0,  1,  0},    /* 0 */
        { OP_Integer,        0,  1,  0},    /* 1 */
        { OP_SetCookie,      0,  0,  1},    /* 2 */
      };
      int addr = sqlite3VdbeAddOpList(v, ArraySize(setCookie), setCookie);
      sqlite3VdbeChangeP1(v, addr, iDb);
      sqlite3VdbeChangeP1(v, addr+1, atoi(zRight));
      sqlite3VdbeChangeP1(v, addr+2, iDb);
      sqlite3VdbeChangeP2(v, addr+2, iCookie);
    }else{
      /* Read the specified cookie value */
      static const VdbeOpList readCookie[] = {
        { OP_Transaction,     0,  0,  0},    /* 0 */
        { OP_ReadCookie,      0,  1,  0},    /* 1 */







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      static const VdbeOpList setCookie[] = {
        { OP_Transaction,    0,  1,  0},    /* 0 */
        { OP_Integer,        0,  1,  0},    /* 1 */
        { OP_SetCookie,      0,  0,  1},    /* 2 */
      };
      int addr = sqlite3VdbeAddOpList(v, ArraySize(setCookie), setCookie);
      sqlite3VdbeChangeP1(v, addr, iDb);
      sqlite3VdbeChangeP1(v, addr+1, sqlite3Atoi(zRight));
      sqlite3VdbeChangeP1(v, addr+2, iDb);
      sqlite3VdbeChangeP2(v, addr+2, iCookie);
    }else{
      /* Read the specified cookie value */
      static const VdbeOpList readCookie[] = {
        { OP_Transaction,     0,  0,  0},    /* 0 */
        { OP_ReadCookie,      0,  1,  0},    /* 1 */
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  **
  ** Configure a database connection to automatically checkpoint a database
  ** after accumulating N frames in the log. Or query for the current value
  ** of N.
  */
  if( sqlite3StrICmp(zLeft, "wal_autocheckpoint")==0 ){
    if( zRight ){
      int nAuto = atoi(zRight);
      sqlite3_wal_autocheckpoint(db, nAuto);
    }
    returnSingleInt(pParse, "wal_autocheckpoint", 
       db->xWalCallback==sqlite3WalDefaultHook ? 
           SQLITE_PTR_TO_INT(db->pWalArg) : 0);
  }else
#endif








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  **
  ** Configure a database connection to automatically checkpoint a database
  ** after accumulating N frames in the log. Or query for the current value
  ** of N.
  */
  if( sqlite3StrICmp(zLeft, "wal_autocheckpoint")==0 ){
    if( zRight ){

      sqlite3_wal_autocheckpoint(db, sqlite3Atoi(zRight));
    }
    returnSingleInt(pParse, "wal_autocheckpoint", 
       db->xWalCallback==sqlite3WalDefaultHook ? 
           SQLITE_PTR_TO_INT(db->pWalArg) : 0);
  }else
#endif

Changes to src/prepare.c.
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    */
    int rc;
    sqlite3_stmt *pStmt;
    TESTONLY(int rcp);            /* Return code from sqlite3_prepare() */

    assert( db->init.busy );
    db->init.iDb = iDb;
    db->init.newTnum = atoi(argv[1]);
    db->init.orphanTrigger = 0;
    TESTONLY(rcp = ) sqlite3_prepare(db, argv[2], -1, &pStmt, 0);
    rc = db->errCode;
    assert( (rc&0xFF)==(rcp&0xFF) );
    db->init.iDb = 0;
    if( SQLITE_OK!=rc ){
      if( db->init.orphanTrigger ){







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    */
    int rc;
    sqlite3_stmt *pStmt;
    TESTONLY(int rcp);            /* Return code from sqlite3_prepare() */

    assert( db->init.busy );
    db->init.iDb = iDb;
    db->init.newTnum = sqlite3Atoi(argv[1]);
    db->init.orphanTrigger = 0;
    TESTONLY(rcp = ) sqlite3_prepare(db, argv[2], -1, &pStmt, 0);
    rc = db->errCode;
    assert( (rc&0xFF)==(rcp&0xFF) );
    db->init.iDb = 0;
    if( SQLITE_OK!=rc ){
      if( db->init.orphanTrigger ){
Changes to src/sqliteInt.h.
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int sqlite3FixSrcList(DbFixer*, SrcList*);
int sqlite3FixSelect(DbFixer*, Select*);
int sqlite3FixExpr(DbFixer*, Expr*);
int sqlite3FixExprList(DbFixer*, ExprList*);
int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
int sqlite3AtoF(const char *z, double*, int, u8);
int sqlite3GetInt32(const char *, int*);

int sqlite3Utf16ByteLen(const void *pData, int nChar);
int sqlite3Utf8CharLen(const char *pData, int nByte);
int sqlite3Utf8Read(const u8*, const u8**);

/*
** Routines to read and write variable-length integers.  These used to
** be defined locally, but now we use the varint routines in the util.c







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int sqlite3FixSrcList(DbFixer*, SrcList*);
int sqlite3FixSelect(DbFixer*, Select*);
int sqlite3FixExpr(DbFixer*, Expr*);
int sqlite3FixExprList(DbFixer*, ExprList*);
int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
int sqlite3AtoF(const char *z, double*, int, u8);
int sqlite3GetInt32(const char *, int*);
int sqlite3Atoi(const char*);
int sqlite3Utf16ByteLen(const void *pData, int nChar);
int sqlite3Utf8CharLen(const char *pData, int nByte);
int sqlite3Utf8Read(const u8*, const u8**);

/*
** Routines to read and write variable-length integers.  These used to
** be defined locally, but now we use the varint routines in the util.c
Changes to src/util.c.
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  }
  if( neg ){
    v = -v;
  }
  *pValue = (int)v;
  return 1;
}











/*
** The variable-length integer encoding is as follows:
**
** KEY:
**         A = 0xxxxxxx    7 bits of data and one flag bit
**         B = 1xxxxxxx    7 bits of data and one flag bit







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  }
  if( neg ){
    v = -v;
  }
  *pValue = (int)v;
  return 1;
}

/*
** Return a 32-bit integer value extracted from a string.  If the
** string is not an integer, just return 0.
*/
int sqlite3Atoi(const char *z){
  int x = 0;
  if( z ) sqlite3GetInt32(z, &x);
  return x;
}

/*
** The variable-length integer encoding is as follows:
**
** KEY:
**         A = 0xxxxxxx    7 bits of data and one flag bit
**         B = 1xxxxxxx    7 bits of data and one flag bit
Changes to src/vdbe.c.
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** Write the current number of pages in database P1 to memory cell P2.
*/
case OP_Pagecount: {            /* out2-prerelease */
  pOut->u.i = sqlite3BtreeLastPage(db->aDb[pOp->p1].pBt);
  break;
}
#endif





















#ifndef SQLITE_OMIT_TRACE
/* Opcode: Trace * * * P4 *
**
** If tracing is enabled (by the sqlite3_trace()) interface, then
** the UTF-8 string contained in P4 is emitted on the trace callback.
*/







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** Write the current number of pages in database P1 to memory cell P2.
*/
case OP_Pagecount: {            /* out2-prerelease */
  pOut->u.i = sqlite3BtreeLastPage(db->aDb[pOp->p1].pBt);
  break;
}
#endif


#ifndef  SQLITE_OMIT_PAGER_PRAGMAS
/* Opcode: MaxPgcnt P1 P2 P3 * *
**
** Try to set the maximum page count for database P1 to the value in P3.
** Do not let the maximum page count fall below the current page count.
** Store the maximum page count after the change in register P2.
*/
case OP_MaxPgcnt: {            /* out2-prerelease */
  unsigned int pgcnt;
  Btree *pBt;

  pBt = db->aDb[pOp->p1].pBt;
  pgcnt = sqlite3BtreeLastPage(pBt);
  pOut->u.i = sqlite3BtreeMaxPageCount(pBt, pOp->p3<pgcnt ? pgcnt : pOp->p3);
  break;
}
#endif


#ifndef SQLITE_OMIT_TRACE
/* Opcode: Trace * * * P4 *
**
** If tracing is enabled (by the sqlite3_trace()) interface, then
** the UTF-8 string contained in P4 is emitted on the trace callback.
*/
Changes to test/pager1.test.
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} {13}
do_execsql_test pager1-6.8 {
    INSERT INTO t11 VALUES(3, 4);
    PRAGMA max_page_count = 10;
} {11}
do_execsql_test pager1-6.9 { COMMIT } {}

do_execsql_test pager1-6.10 { PRAGMA max_page_count = 10 } {10}
do_execsql_test pager1-6.11 { SELECT * FROM t11 }          {1 2 3 4}
do_execsql_test pager1-6.12 { PRAGMA max_page_count }      {11}


#-------------------------------------------------------------------------
# The following tests work with "PRAGMA journal_mode=TRUNCATE" and
# "PRAGMA locking_mode=EXCLUSIVE".







|







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} {13}
do_execsql_test pager1-6.8 {
    INSERT INTO t11 VALUES(3, 4);
    PRAGMA max_page_count = 10;
} {11}
do_execsql_test pager1-6.9 { COMMIT } {}

do_execsql_test pager1-6.10 { PRAGMA max_page_count = 10 } {11}
do_execsql_test pager1-6.11 { SELECT * FROM t11 }          {1 2 3 4}
do_execsql_test pager1-6.12 { PRAGMA max_page_count }      {11}


#-------------------------------------------------------------------------
# The following tests work with "PRAGMA journal_mode=TRUNCATE" and
# "PRAGMA locking_mode=EXCLUSIVE".