**     CREATE INDEX
**     DROP INDEX
**     creating ID lists
**     BEGIN TRANSACTION
**     COMMIT
**     ROLLBACK
**
** $Id: build.c,v 1.467 2008/01/17 16:22:15 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** This routine is called when a new SQL statement is beginning to
** be parsed.  Initialize the pParse structure as needed.
................................................................................
                                 &db->aDb[1].pBt);
    if( rc!=SQLITE_OK ){
      sqlite3ErrorMsg(pParse, "unable to open a temporary database "
        "file for storing temporary tables");
      pParse->rc = rc;
      return 1;
    }
    if( db->flags & !db->autoCommit ){
      rc = sqlite3BtreeBeginTrans(db->aDb[1].pBt, 1);
      if( rc!=SQLITE_OK ){
        sqlite3ErrorMsg(pParse, "unable to get a write lock on "
          "the temporary database file");
        pParse->rc = rc;
        return 1;
      }
    }
    assert( db->aDb[1].pSchema );
  }
  return 0;
}

/*
** Generate VDBE code that will verify the schema cookie and start

**     CREATE INDEX
**     DROP INDEX
**     creating ID lists
**     BEGIN TRANSACTION
**     COMMIT
**     ROLLBACK
**
** $Id: build.c,v 1.468 2008/01/21 16:22:46 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** This routine is called when a new SQL statement is beginning to
** be parsed.  Initialize the pParse structure as needed.
................................................................................
                                 &db->aDb[1].pBt);
    if( rc!=SQLITE_OK ){
      sqlite3ErrorMsg(pParse, "unable to open a temporary database "
        "file for storing temporary tables");
      pParse->rc = rc;
      return 1;
    }
    assert( (db->flags & SQLITE_InTrans)==0 || db->autoCommit );








    assert( db->aDb[1].pSchema );
  }
  return 0;
}

/*
** Generate VDBE code that will verify the schema cookie and start

** This file contains the C functions that implement various SQL
** functions of SQLite.  
**
** There is only one exported symbol in this file - the function
** sqliteRegisterBuildinFunctions() found at the bottom of the file.
** All other code has file scope.
**
** $Id: func.c,v 1.182 2008/01/19 23:50:26 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
#include <stdlib.h>
#include <assert.h>
#include "vdbeInt.h"

................................................................................
  memset(zRet, 0, nArg*2);
  for(i=0; i<nArg; i++){
    char const *z = (char*)sqlite3_value_text(argv[i]);
    if( z ){
      char *zAux = sqlite3_get_auxdata(pCtx, i);
      if( zAux ){
        zRet[i*2] = '1';
        if( strcmp(zAux, z) ){
          sqlite3_result_error(pCtx, "auxdata corruption", -1);
          return;
        }
      }else {
        zRet[i*2] = '0';
      }

      zAux = contextMalloc(pCtx, strlen(z)+1);
      if( zAux ){
        strcpy(zAux, z);

** This file contains the C functions that implement various SQL
** functions of SQLite.  
**
** There is only one exported symbol in this file - the function
** sqliteRegisterBuildinFunctions() found at the bottom of the file.
** All other code has file scope.
**
** $Id: func.c,v 1.183 2008/01/21 16:22:46 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
#include <stdlib.h>
#include <assert.h>
#include "vdbeInt.h"

................................................................................
  memset(zRet, 0, nArg*2);
  for(i=0; i<nArg; i++){
    char const *z = (char*)sqlite3_value_text(argv[i]);
    if( z ){
      char *zAux = sqlite3_get_auxdata(pCtx, i);
      if( zAux ){
        zRet[i*2] = '1';
        assert( strcmp(zAux,z)==0 );



      }else {
        zRet[i*2] = '0';
      }

      zAux = contextMalloc(pCtx, strlen(z)+1);
      if( zAux ){
        strcpy(zAux, z);

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle INSERT statements in SQLite.
**
** $Id: insert.c,v 1.226 2008/01/19 03:35:59 drh Exp $
*/
#include "sqliteInt.h"

/*
** Set P4 of the most recently inserted opcode to a column affinity
** string for index pIdx. A column affinity string has one character
** for each column in the table, according to the affinity of the column:
................................................................................
    onError = pTab->keyConf;
    if( overrideError!=OE_Default ){
      onError = overrideError;
    }else if( onError==OE_Default ){
      onError = OE_Abort;
    }
    
    if( onError==OE_Replace && pTab->pIndex==0 ){
      seenReplace = 1;
    }else{
      if( isUpdate ){
        j2 = sqlite3VdbeAddOp3(v, OP_Eq, regRowid, 0, regRowid-1);
      }
      j3 = sqlite3VdbeAddOp3(v, OP_NotExists, baseCur, 0, regRowid);
      switch( onError ){
        default: {
          onError = OE_Abort;
................................................................................
    if( pSrc->aiColumn[i]!=pDest->aiColumn[i] ){
      return 0;   /* Different columns indexed */
    }
    if( pSrc->aSortOrder[i]!=pDest->aSortOrder[i] ){
      return 0;   /* Different sort orders */
    }
    if( pSrc->azColl[i]!=pDest->azColl[i] ){
      return 0;   /* Different sort orders */
    }
  }

  /* If no test above fails then the indices must be compatible */
  return 1;
}

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle INSERT statements in SQLite.
**
** $Id: insert.c,v 1.227 2008/01/21 16:22:46 drh Exp $
*/
#include "sqliteInt.h"

/*
** Set P4 of the most recently inserted opcode to a column affinity
** string for index pIdx. A column affinity string has one character
** for each column in the table, according to the affinity of the column:
................................................................................
    onError = pTab->keyConf;
    if( overrideError!=OE_Default ){
      onError = overrideError;
    }else if( onError==OE_Default ){
      onError = OE_Abort;
    }
    
    if( onError!=OE_Replace || pTab->pIndex ){


      if( isUpdate ){
        j2 = sqlite3VdbeAddOp3(v, OP_Eq, regRowid, 0, regRowid-1);
      }
      j3 = sqlite3VdbeAddOp3(v, OP_NotExists, baseCur, 0, regRowid);
      switch( onError ){
        default: {
          onError = OE_Abort;
................................................................................
    if( pSrc->aiColumn[i]!=pDest->aiColumn[i] ){
      return 0;   /* Different columns indexed */
    }
    if( pSrc->aSortOrder[i]!=pDest->aSortOrder[i] ){
      return 0;   /* Different sort orders */
    }
    if( pSrc->azColl[i]!=pDest->azColl[i] ){
      return 0;   /* Different collating sequences */
    }
  }

  /* If no test above fails then the indices must be compatible */
  return 1;
}

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code to implement the "sqlite" command line
** utility for accessing SQLite databases.
**
** $Id: shell.c,v 1.173 2008/01/14 15:20:08 drh Exp $
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include "sqlite3.h"
#include <ctype.h>
................................................................................
      ** did an .explain followed by a .width, .mode or .header
      ** command.
      */
      p->mode = MODE_Explain;
      p->showHeader = 1;
      memset(p->colWidth,0,ArraySize(p->colWidth));
      p->colWidth[0] = 4;                  /* addr */
      p->colWidth[1] = 14;                 /* opcode */
      p->colWidth[2] = 10;                 /* P1 */
      p->colWidth[3] = 10;                 /* P2 */
      p->colWidth[4] = 10;                 /* P3 */
      p->colWidth[5] = 20;                 /* P4 */
      p->colWidth[6] = 2;                  /* P5 */
      p->colWidth[7] = 7;                  /* Comment */
    }else if (p->explainPrev.valid) {
      p->explainPrev.valid = 0;
      p->mode = p->explainPrev.mode;
      p->showHeader = p->explainPrev.showHeader;
      memcpy(p->colWidth,p->explainPrev.colWidth,sizeof(p->colWidth));
    }
  }else

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code to implement the "sqlite" command line
** utility for accessing SQLite databases.
**
** $Id: shell.c,v 1.174 2008/01/21 16:22:46 drh Exp $
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include "sqlite3.h"
#include <ctype.h>
................................................................................
      ** did an .explain followed by a .width, .mode or .header
      ** command.
      */
      p->mode = MODE_Explain;
      p->showHeader = 1;
      memset(p->colWidth,0,ArraySize(p->colWidth));
      p->colWidth[0] = 4;                  /* addr */
      p->colWidth[1] = 13;                 /* opcode */
      p->colWidth[2] = 4;                  /* P1 */
      p->colWidth[3] = 4;                  /* P2 */
      p->colWidth[4] = 4;                  /* P3 */
      p->colWidth[5] = 13;                 /* P4 */
      p->colWidth[6] = 2;                  /* P5 */
      p->colWidth[7] = 13;                  /* Comment */
    }else if (p->explainPrev.valid) {
      p->explainPrev.valid = 0;
      p->mode = p->explainPrev.mode;
      p->showHeader = p->explainPrev.showHeader;
      memcpy(p->colWidth,p->explainPrev.colWidth,sizeof(p->colWidth));
    }
  }else

**
** Various scripts scan this source file in order to generate HTML
** documentation, headers files, or other derived files.  The formatting
** of the code in this file is, therefore, important.  See other comments
** in this file for details.  If in doubt, do not deviate from existing
** commenting and indentation practices when changing or adding code.
**
** $Id: vdbe.c,v 1.702 2008/01/19 23:50:26 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
** The following global variable is incremented every time a cursor
................................................................................
  pOut->z = zNew;
  UPDATE_MAX_BLOBSIZE(pOut);
  break;
}

/* Opcode: Add P1 P2 P3 * *
**

** Add the value in P1 to the value in P2 and store the result in P3.
** If either operand is NULL, the result is NULL.
*/
/* Opcode: Multiply P1 P2 P3 * *
**
**

** Multiply the value in P1 by the value in P2 and store the result in P3.
** If either operand is NULL, the result is NULL.
*/
/* Opcode: Subtract P1 P2 P3 * *
**
** Subtract the value in P1 from the value in P2 and store the result
** in P3.
** If either operand is NULL, the result is NULL.
*/
/* Opcode: Divide P1 P2 P3 * *
**
** Divide the value in P1 by the value in P2 and store the result

** in P3.  If the value in P2 is zero, then the result is NULL.
** If either operand is NULL, the result is NULL.
*/
/* Opcode: Remainder P1 P2 P3 * *
**
** Compute the remainder after integer division of the value in
** register P1 by the value in register P2 and store the result in P3. 
** If the value in register P2 is zero the result is NULL.
** If either operand is NULL, the result is NULL.
................................................................................
  break;
}

/* Opcode: BitAnd P1 P2 P3 * *
**
** Take the bit-wise AND of the values in register P1 and P2 and
** store the result in register P3.
** If either operand is NULL, the result is NULL.
*/
/* Opcode: BitOr P1 P2 P3 * *
**
** Take the bit-wise OR of the values in register P1 and P2 and
** store the result in register P3.
** If either operand is NULL, the result is NULL.
*/
/* Opcode: ShiftLeft P1 P2 P3 * *
**
** Shift the integer value in register P2 to the left by the
** number of bits specified by the integer in P1.
** Store the result in register P3.
** If either operand is NULL, the result is NULL.
*/
/* Opcode: ShiftRight P1 P2 P3 * *
**
** Shift the integer value in register P2 to the right by the
** number of bits specified by the integer in P1.
** Store the result in register P3.
** If either operand is NULL, the result is NULL.
*/
case OP_BitAnd:                 /* same as TK_BITAND, in1, in2, out3 */
case OP_BitOr:                  /* same as TK_BITOR, in1, in2, out3 */
case OP_ShiftLeft:              /* same as TK_LSHIFT, in1, in2, out3 */
case OP_ShiftRight: {           /* same as TK_RSHIFT, in1, in2, out3 */
  i64 a, b;

................................................................................
  pOut->u.i = a;
  pOut->flags = MEM_Int;
  break;
}

/* Opcode: AddImm  P1 P2 * * *
** 
** Add P2 the value in register P1.
** The result is always an integer.
**
** To force any register to be an integer, just add 0.
*/
case OP_AddImm: {            /* in1 */
  sqlite3VdbeMemIntegerify(pIn1);
  pIn1->u.i += pOp->p2;
................................................................................

#ifndef SQLITE_OMIT_CAST
/* Opcode: ToReal P1 * * * *
**
** Force the value in register P1 to be a floating point number.
** If The value is currently an integer, convert it.
** If the value is text or blob, try to convert it to an integer using the
** equivalent of atoi() and store 0 if no such conversion is possible.
**
** A NULL value is not changed by this routine.  It remains NULL.
*/
case OP_ToReal: {                  /* same as TK_TO_REAL, in1 */
  if( (pIn1->flags & MEM_Null)==0 ){
    sqlite3VdbeMemRealify(pIn1);
  }
................................................................................
**
** If the SQLITE_NULLEQUAL bit of P5 is set then treat NULL operands
** as being equal to one another.  Normally NULLs are not equal to 
** anything including other NULLs.
**
** The SQLITE_AFF_MASK portion of P5 must be an affinity character -
** SQLITE_AFF_TEXT, SQLITE_AFF_INTEGER, and so forth. An attempt is made 
** to coerce both operands according to this affinity before the
** comparison is made. If the SQLITE_AFF_MASK is 0x00, then numeric
** affinity is used.


**
** Once any conversions have taken place, and neither value is NULL, 
** the values are compared. If both values are blobs then memcmp() is
** used to determine the results of the comparison.  If both values
** are text, then the appropriate collating function specified in
** P4 is  used to do the comparison.  If P4 is not specified then
** memcmp() is used to compare text string.  If both values are
................................................................................
  if( pIn1->flags & MEM_Null ) break;  /* Do nothing to NULLs */
  sqlite3VdbeMemIntegerify(pIn1);
  pIn1->u.i = ~pIn1->u.i;
  assert( pIn1->flags==MEM_Int );
  break;
}

/* Opcode: Noop * * * * *
**
** Do nothing.  This instruction is often useful as a jump
** destination.
*/
/*
** The magic Explain opcode are only inserted when explain==2 (which
** is to say when the EXPLAIN QUERY PLAN syntax is used.)
** This opcode records information from the optimizer.  It is the
** the same as a no-op.  This opcodesnever appears in a real VM program.
*/
case OP_Explain:
case OP_Noop: {
  break;
}

/* Opcode: If P1 P2 P3 * *
**
** Jump to P2 if the value in register P1 is true.  The value is
** is considered true if it is numeric and non-zero.  If the value
** in P1 is NULL then take the jump if P3 is true.
*/
/* Opcode: IfNot P1 P2 P3 * *
................................................................................
**
** Begin a transaction.  The transaction ends when a Commit or Rollback
** opcode is encountered.  Depending on the ON CONFLICT setting, the
** transaction might also be rolled back if an error is encountered.
**
** P1 is the index of the database file on which the transaction is
** started.  Index 0 is the main database file and index 1 is the
** file used for temporary tables.

**
** If P2 is non-zero, then a write-transaction is started.  A RESERVED lock is
** obtained on the database file when a write-transaction is started.  No
** other process can start another write transaction while this transaction is
** underway.  Starting a write transaction also creates a rollback journal. A
** write transaction must be started before any changes can be made to the
** database.  If P2 is 2 or greater then an EXCLUSIVE lock is also obtained
................................................................................
  break;
}

/* Opcode: OpenRead P1 P2 P3 P4 P5
**
** Open a read-only cursor for the database table whose root page is
** P2 in a database file.  The database file is determined by P3. 
** P3==0 means the main database and P3==1 means the database used for 

** temporary tables.  Give the new cursor an identifier of P1.  The P1
** values need not be contiguous but all P1 values should be small integers.
** It is an error for P1 to be negative.
**
** If P5!=0 then use the content of register P2 as the root page, not
** the value of P2 itself.
**
** There will be a read lock on the database whenever there is an
................................................................................
/* Opcode: Next P1 P2 * * *
**
** Advance cursor P1 so that it points to the next key/data pair in its
** table or index.  If there are no more key/value pairs then fall through
** to the following instruction.  But if the cursor advance was successful,
** jump immediately to P2.
**


** See also: Prev
*/
/* Opcode: Prev P1 P2 * * *
**
** Back up cursor P1 so that it points to the previous key/data pair in its
** table or index.  If there is no previous key/value pairs then fall through
** to the following instruction.  But if the cursor backup was successful,
** jump immediately to P2.


*/
case OP_Prev:          /* jump */
case OP_Next: {        /* jump */
  Cursor *pC;
  BtCursor *pCrsr;


  CHECK_FOR_INTERRUPT;
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  if( pC==0 ){
    break;  /* See ticket #2273 */
  }
  if( (pCrsr = pC->pCursor)!=0 ){
    int res;
    if( pC->nullRow ){
      res = 1;
    }else{
      assert( pC->deferredMoveto==0 );
      rc = pOp->opcode==OP_Next ? sqlite3BtreeNext(pCrsr, &res) :
                                  sqlite3BtreePrevious(pCrsr, &res);
      pC->nullRow = res;
      pC->cacheStatus = CACHE_STALE;
    }
    if( res==0 ){
      pc = pOp->p2 - 1;
#ifdef SQLITE_TEST
      sqlite3_search_count++;
#endif
    }
  }else{
    pC->nullRow = 1;
  }
  pC->rowidIsValid = 0;
  break;
}

/* Opcode: IdxInsert P1 P2 P3 * *
**
................................................................................
/* Opcode: IntegrityCk P1 P2 P3 * P5
**
** Do an analysis of the currently open database.  Store in
** register P1 the text of an error message describing any problems.
** If no problems are found, store a NULL in register P1.
**
** The register P3 contains the maximum number of allowed errors.
** At most reg[P3] errors will be reported.
** In other words, the analysis stops as soon as reg[P1] errors are 
** seen.  Reg[P1] is updated with the number of errors remaining.
**
** The root page numbers of all tables in the database are integer
** stored in reg[P1], reg[P1+1], reg[P1+2], ....  There are P2 tables
** total.
**
** If P5 is not zero, the check is done on the auxiliary database
** file, not the main database file.
**
** This opcode is used to implement the integrity_check pragma.
*/

**
** Various scripts scan this source file in order to generate HTML
** documentation, headers files, or other derived files.  The formatting
** of the code in this file is, therefore, important.  See other comments
** in this file for details.  If in doubt, do not deviate from existing
** commenting and indentation practices when changing or adding code.
**
** $Id: vdbe.c,v 1.703 2008/01/21 16:22:46 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
** The following global variable is incremented every time a cursor
................................................................................
  pOut->z = zNew;
  UPDATE_MAX_BLOBSIZE(pOut);
  break;
}

/* Opcode: Add P1 P2 P3 * *
**
** Add the value in register P1 to the value in register P2
** and store the result in regiser P3.
** If either input is NULL, the result is NULL.
*/
/* Opcode: Multiply P1 P2 P3 * *
**
**
** Multiply the value in regiser P1 by the value in regiser P2
** and store the result in register P3.
** If either input is NULL, the result is NULL.
*/
/* Opcode: Subtract P1 P2 P3 * *
**
** Subtract the value in register P1 from the value in register P2
** and store the result in register P3.
** If either input is NULL, the result is NULL.
*/
/* Opcode: Divide P1 P2 P3 * *
**
** Divide the value in register P1 by the value in register P2
** and store the result in register P3.  If the value in register P2
** is zero, then the result is NULL.
** If either input is NULL, the result is NULL.
*/
/* Opcode: Remainder P1 P2 P3 * *
**
** Compute the remainder after integer division of the value in
** register P1 by the value in register P2 and store the result in P3. 
** If the value in register P2 is zero the result is NULL.
** If either operand is NULL, the result is NULL.
................................................................................
  break;
}

/* Opcode: BitAnd P1 P2 P3 * *
**
** Take the bit-wise AND of the values in register P1 and P2 and
** store the result in register P3.
** If either input is NULL, the result is NULL.
*/
/* Opcode: BitOr P1 P2 P3 * *
**
** Take the bit-wise OR of the values in register P1 and P2 and
** store the result in register P3.
** If either input is NULL, the result is NULL.
*/
/* Opcode: ShiftLeft P1 P2 P3 * *
**
** Shift the integer value in register P2 to the left by the
** number of bits specified by the integer in regiser P1.
** Store the result in register P3.
** If either input is NULL, the result is NULL.
*/
/* Opcode: ShiftRight P1 P2 P3 * *
**
** Shift the integer value in register P2 to the right by the
** number of bits specified by the integer in register P1.
** Store the result in register P3.
** If either input is NULL, the result is NULL.
*/
case OP_BitAnd:                 /* same as TK_BITAND, in1, in2, out3 */
case OP_BitOr:                  /* same as TK_BITOR, in1, in2, out3 */
case OP_ShiftLeft:              /* same as TK_LSHIFT, in1, in2, out3 */
case OP_ShiftRight: {           /* same as TK_RSHIFT, in1, in2, out3 */
  i64 a, b;

................................................................................
  pOut->u.i = a;
  pOut->flags = MEM_Int;
  break;
}

/* Opcode: AddImm  P1 P2 * * *
** 
** Add the constant P2 the value in register P1.
** The result is always an integer.
**
** To force any register to be an integer, just add 0.
*/
case OP_AddImm: {            /* in1 */
  sqlite3VdbeMemIntegerify(pIn1);
  pIn1->u.i += pOp->p2;
................................................................................

#ifndef SQLITE_OMIT_CAST
/* Opcode: ToReal P1 * * * *
**
** Force the value in register P1 to be a floating point number.
** If The value is currently an integer, convert it.
** If the value is text or blob, try to convert it to an integer using the
** equivalent of atoi() and store 0.0 if no such conversion is possible.
**
** A NULL value is not changed by this routine.  It remains NULL.
*/
case OP_ToReal: {                  /* same as TK_TO_REAL, in1 */
  if( (pIn1->flags & MEM_Null)==0 ){
    sqlite3VdbeMemRealify(pIn1);
  }
................................................................................
**
** If the SQLITE_NULLEQUAL bit of P5 is set then treat NULL operands
** as being equal to one another.  Normally NULLs are not equal to 
** anything including other NULLs.
**
** The SQLITE_AFF_MASK portion of P5 must be an affinity character -
** SQLITE_AFF_TEXT, SQLITE_AFF_INTEGER, and so forth. An attempt is made 
** to coerce both inputs according to this affinity before the
** comparison is made. If the SQLITE_AFF_MASK is 0x00, then numeric
** affinity is used. Note that the affinity conversions are stored
** back into the input registers P1 and P3.  So this opcode can cause
** persistent changes to registers P1 and P3.
**
** Once any conversions have taken place, and neither value is NULL, 
** the values are compared. If both values are blobs then memcmp() is
** used to determine the results of the comparison.  If both values
** are text, then the appropriate collating function specified in
** P4 is  used to do the comparison.  If P4 is not specified then
** memcmp() is used to compare text string.  If both values are
................................................................................
  if( pIn1->flags & MEM_Null ) break;  /* Do nothing to NULLs */
  sqlite3VdbeMemIntegerify(pIn1);
  pIn1->u.i = ~pIn1->u.i;
  assert( pIn1->flags==MEM_Int );
  break;
}

















/* Opcode: If P1 P2 P3 * *
**
** Jump to P2 if the value in register P1 is true.  The value is
** is considered true if it is numeric and non-zero.  If the value
** in P1 is NULL then take the jump if P3 is true.
*/
/* Opcode: IfNot P1 P2 P3 * *
................................................................................
**
** Begin a transaction.  The transaction ends when a Commit or Rollback
** opcode is encountered.  Depending on the ON CONFLICT setting, the
** transaction might also be rolled back if an error is encountered.
**
** P1 is the index of the database file on which the transaction is
** started.  Index 0 is the main database file and index 1 is the
** file used for temporary tables.  Indices of 2 or more are used for
** attached databases.
**
** If P2 is non-zero, then a write-transaction is started.  A RESERVED lock is
** obtained on the database file when a write-transaction is started.  No
** other process can start another write transaction while this transaction is
** underway.  Starting a write transaction also creates a rollback journal. A
** write transaction must be started before any changes can be made to the
** database.  If P2 is 2 or greater then an EXCLUSIVE lock is also obtained
................................................................................
  break;
}

/* Opcode: OpenRead P1 P2 P3 P4 P5
**
** Open a read-only cursor for the database table whose root page is
** P2 in a database file.  The database file is determined by P3. 
** P3==0 means the main database, P3==1 means the database used for 
** temporary tables, and P3>1 means used the corresponding attached
** database.  Give the new cursor an identifier of P1.  The P1
** values need not be contiguous but all P1 values should be small integers.
** It is an error for P1 to be negative.
**
** If P5!=0 then use the content of register P2 as the root page, not
** the value of P2 itself.
**
** There will be a read lock on the database whenever there is an
................................................................................
/* Opcode: Next P1 P2 * * *
**
** Advance cursor P1 so that it points to the next key/data pair in its
** table or index.  If there are no more key/value pairs then fall through
** to the following instruction.  But if the cursor advance was successful,
** jump immediately to P2.
**
** The P1 cursor must be for a real table, not a pseudo-table.
**
** See also: Prev
*/
/* Opcode: Prev P1 P2 * * *
**
** Back up cursor P1 so that it points to the previous key/data pair in its
** table or index.  If there is no previous key/value pairs then fall through
** to the following instruction.  But if the cursor backup was successful,
** jump immediately to P2.
**
** The P1 cursor must be for a real table, not a pseudo-table.
*/
case OP_Prev:          /* jump */
case OP_Next: {        /* jump */
  Cursor *pC;
  BtCursor *pCrsr;
    int res;

  CHECK_FOR_INTERRUPT;
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  if( pC==0 ){
    break;  /* See ticket #2273 */
  }
  pCrsr = pC->pCursor;
  assert( pCrsr );
  if( pC->nullRow ){
    res = 1;
  }else{
    assert( pC->deferredMoveto==0 );
    rc = pOp->opcode==OP_Next ? sqlite3BtreeNext(pCrsr, &res) :
                                sqlite3BtreePrevious(pCrsr, &res);
    pC->nullRow = res;
    pC->cacheStatus = CACHE_STALE;

    if( res==0 ){
      pc = pOp->p2 - 1;
#ifdef SQLITE_TEST
      sqlite3_search_count++;
#endif
    }


  }
  pC->rowidIsValid = 0;
  break;
}

/* Opcode: IdxInsert P1 P2 P3 * *
**
................................................................................
/* Opcode: IntegrityCk P1 P2 P3 * P5
**
** Do an analysis of the currently open database.  Store in
** register P1 the text of an error message describing any problems.
** If no problems are found, store a NULL in register P1.
**
** The register P3 contains the maximum number of allowed errors.
** At most reg(P3) errors will be reported.
** In other words, the analysis stops as soon as reg(P1) errors are 
** seen.  Reg(P1) is updated with the number of errors remaining.
**
** The root page numbers of all tables in the database are integer
** stored in reg(P1), reg(P1+1), reg(P1+2), ....  There are P2 tables
** total.
**
** If P5 is not zero, the check is done on the auxiliary database
** file, not the main database file.
**
** This opcode is used to implement the integrity_check pragma.
*/

#
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# This file implements tests for the conflict resolution extension
# to SQLite.
#
# $Id: conflict.test,v 1.30 2007/08/21 14:27:02 danielk1977 Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

ifcapable !conflict {
  finish_test
  return
................................................................................
  }
  execsql {
    COMMIT;
    SELECT * FROM abc;
  }
} {1 2 3 7 8 9}
integrity_check conflict-11.6































finish_test

#
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# This file implements tests for the conflict resolution extension
# to SQLite.
#
# $Id: conflict.test,v 1.31 2008/01/21 16:22:46 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

ifcapable !conflict {
  finish_test
  return
................................................................................
  }
  execsql {
    COMMIT;
    SELECT * FROM abc;
  }
} {1 2 3 7 8 9}
integrity_check conflict-11.6

# Make sure UPDATE OR REPLACE works on tables that have only
# an INTEGER PRIMARY KEY.
#
do_test conflict-12.1 {
  execsql {
    CREATE TABLE t5(a INTEGER PRIMARY KEY, b text);
    INSERT INTO t5 VALUES(1,'one');
    INSERT INTO t5 VALUES(2,'two');
    SELECT * FROM t5
  }
} {1 one 2 two}
do_test conflict-12.2 {
  execsql {
    UPDATE OR IGNORE t5 SET a=a+1 WHERE a=1;
    SELECT * FROM t5;
  }
} {1 one 2 two}
do_test conflict-12.3 {
  catchsql {
    UPDATE t5 SET a=a+1 WHERE a=1;
  }
} {1 {PRIMARY KEY must be unique}}
do_test conflict-12.4 {
  execsql {
    UPDATE OR REPLACE t5 SET a=a+1 WHERE a=1;
    SELECT * FROM t5;
  }
} {2 one}


finish_test

# 2008 Jan 21
#
# 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 implements regression tests for SQLite library.
#
# This file implements tests for the sqlite3_exec interface
#
# $Id: exec.test,v 1.1 2008/01/21 16:22:46 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

do_test exec-1.1 {
  execsql {
    CREATE TABLE t1(a,b);
    INSERT INTO t1 VALUES(1,2);
    SELECT * FROM t1;
  }
} {1 2}
do_test exec-1.2 {
  sqlite3_exec db {/* comment */;;; SELECT * FROM t1; /* comment */}
} {0 {a b 1 2}}
do_test exec-1.3 {
  sqlite3 db2 test.db
  db2 eval {CREATE TABLE t2(x, y);}
  db2 close
  sqlite3_exec db {SELECT * FROM t1}
} {0 {a b 1 2}}

finish_test

#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is testing the incremental vacuum feature.
#
# Note: There are also some tests for incremental vacuum and IO 
# errors in incrvacuum_ioerr.test.
#
# $Id: incrvacuum.test,v 1.17 2008/01/19 20:11:26 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

# If this build of the library does not support auto-vacuum, omit this
# whole file.
ifcapable {!autovacuum || !pragma} {
................................................................................
} {SQLITE_DONE SQLITE_OK}
do_test incrvacuum-13.5 {
  execsql {
    PRAGMA auto_vacuum;
  }
} {0}















db2 close

finish_test

#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is testing the incremental vacuum feature.
#
# Note: There are also some tests for incremental vacuum and IO 
# errors in incrvacuum_ioerr.test.
#
# $Id: incrvacuum.test,v 1.18 2008/01/21 16:22:46 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

# If this build of the library does not support auto-vacuum, omit this
# whole file.
ifcapable {!autovacuum || !pragma} {
................................................................................
} {SQLITE_DONE SQLITE_OK}
do_test incrvacuum-13.5 {
  execsql {
    PRAGMA auto_vacuum;
  }
} {0}


# Verify that the incremental_vacuum pragma fails gracefully if it
# is used against an invalid database file.
#
do_test incrvacuum-14.1 {
  set out [open invalid.db w]
  puts $out "This is not an SQLite database file"
  close $out
  sqlite3 db3 invalid.db
  catchsql {
    PRAGMA incremental_vacuum(10);
  } db3
} {1 {file is encrypted or is not a database}}

db2 close
db3 close
finish_test

#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is testing the INSERT transfer optimization.
#
# $Id: insert4.test,v 1.9 2007/11/12 15:29:19 danielk1977 Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

ifcapable !view||!subquery {
  finish_test
  return
................................................................................
  catchsql { 
    CREATE TABLE t5(a, b, c);
    INSERT INTO t4 SELECT * FROM t5;
  }
} {1 {table t4 has 2 columns but 3 values were supplied}}

do_test insert4-6.1 {

  execsql {
    CREATE INDEX t2_i2 ON t2(x, y COLLATE nocase); 
    CREATE INDEX t2_i1 ON t2(x ASC, y DESC);
    CREATE INDEX t3_i1 ON t3(a, b);
    INSERT INTO t2 SELECT * FROM t3;
  }

} {}






























finish_test

#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is testing the INSERT transfer optimization.
#
# $Id: insert4.test,v 1.10 2008/01/21 16:22:46 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

ifcapable !view||!subquery {
  finish_test
  return
................................................................................
  catchsql { 
    CREATE TABLE t5(a, b, c);
    INSERT INTO t4 SELECT * FROM t5;
  }
} {1 {table t4 has 2 columns but 3 values were supplied}}

do_test insert4-6.1 {
  set ::sqlite3_xferopt_count 0
  execsql {
    CREATE INDEX t2_i2 ON t2(x, y COLLATE nocase); 
    CREATE INDEX t2_i1 ON t2(x ASC, y DESC);
    CREATE INDEX t3_i1 ON t3(a, b);
    INSERT INTO t2 SELECT * FROM t3;
  }
  set ::sqlite3_xferopt_count
} {0}
do_test insert4-6.2 {
  set ::sqlite3_xferopt_count 0
  execsql {
    DROP INDEX t2_i2;
    INSERT INTO t2 SELECT * FROM t3;
  }
  set ::sqlite3_xferopt_count
} {0}
do_test insert4-6.3 {
  set ::sqlite3_xferopt_count 0
  execsql {
    DROP INDEX t2_i1;
    CREATE INDEX t2_i1 ON t2(x ASC, y ASC);
    INSERT INTO t2 SELECT * FROM t3;
  }
  set ::sqlite3_xferopt_count
} {1}
do_test insert4-6.4 {
  set ::sqlite3_xferopt_count 0
  execsql {
    DROP INDEX t2_i1;
    CREATE INDEX t2_i1 ON t2(x ASC, y COLLATE RTRIM);
    INSERT INTO t2 SELECT * FROM t3;
  }
  set ::sqlite3_xferopt_count
} {0}




finish_test