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Overview
Comment:Progress toward registerification of the constraint checking logic for INSERT and UPDATE. (CVS 4693)
Downloads: Tarball | ZIP archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: b9bf509e39f5ac38c2149d2a648f68e5df5ae9e3
User & Date: drh 2008-01-08 02:57:56.000
Context
2008-01-08
15:18
Add additional randomness to crash tests. (CVS 4694) (check-in: 3ccce1f58b user: drh tags: trunk)
02:57
Progress toward registerification of the constraint checking logic for INSERT and UPDATE. (CVS 4693) (check-in: b9bf509e39 user: drh tags: trunk)
2008-01-07
19:20
Registerify the AUTOINCREMENT processing and the OP_IsNull and OP_NotNull operators. (CVS 4692) (check-in: aa48867cfa user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/delete.c.
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**    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
** in order to generate code for DELETE FROM statements.
**
** $Id: delete.c,v 1.152 2008/01/06 00:25:22 drh Exp $
*/
#include "sqliteInt.h"

/*
** Look up every table that is named in pSrc.  If any table is not found,
** add an error message to pParse->zErrMsg and return NULL.  If all tables
** are found, return a pointer to the last table.







|







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**    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
** in order to generate code for DELETE FROM statements.
**
** $Id: delete.c,v 1.153 2008/01/08 02:57:56 drh Exp $
*/
#include "sqliteInt.h"

/*
** Look up every table that is named in pSrc.  If any table is not found,
** add an error message to pParse->zErrMsg and return NULL.  If all tables
** are found, return a pointer to the last table.
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**   3.  The "iCur" cursor must be pointing to the row that is to be
**       deleted.
*/
void sqlite3GenerateRowIndexDelete(
  Vdbe *v,           /* Generate code into this VDBE */
  Table *pTab,       /* Table containing the row to be deleted */
  int iCur,          /* Cursor number for the table */
  char *aIdxUsed     /* Only delete if aIdxUsed!=0 && aIdxUsed[i]!=0 */
){
  int i;
  Index *pIdx;

  for(i=1, pIdx=pTab->pIndex; pIdx; i++, pIdx=pIdx->pNext){
    if( aIdxUsed!=0 && aIdxUsed[i-1]==0 ) continue;
    sqlite3GenerateIndexKey(v, pIdx, iCur);
    sqlite3VdbeAddOp1(v, OP_IdxDelete, iCur+i);
  }
}

/*
** Generate code that will assemble an index key and put it on the top







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**   3.  The "iCur" cursor must be pointing to the row that is to be
**       deleted.
*/
void sqlite3GenerateRowIndexDelete(
  Vdbe *v,           /* Generate code into this VDBE */
  Table *pTab,       /* Table containing the row to be deleted */
  int iCur,          /* Cursor number for the table */
  int *aRegIdx       /* Only delete if aRegIdx!=0 && aRegIdx[i]>0 */
){
  int i;
  Index *pIdx;

  for(i=1, pIdx=pTab->pIndex; pIdx; i++, pIdx=pIdx->pNext){
    if( aRegIdx!=0 && aRegIdx[i-1]==0 ) continue;
    sqlite3GenerateIndexKey(v, pIdx, iCur);
    sqlite3VdbeAddOp1(v, OP_IdxDelete, iCur+i);
  }
}

/*
** Generate code that will assemble an index key and put it on the top
Changes to src/expr.c.
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**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains routines used for analyzing expressions and
** for generating VDBE code that evaluates expressions in SQLite.
**
** $Id: expr.c,v 1.336 2008/01/07 19:20:25 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** Return the 'affinity' of the expression pExpr if any.
**







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**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains routines used for analyzing expressions and
** for generating VDBE code that evaluates expressions in SQLite.
**
** $Id: expr.c,v 1.337 2008/01/08 02:57:56 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** Return the 'affinity' of the expression pExpr if any.
**
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** the make process cause these values to align.  Assert()s in the code
** below verify that the numbers are aligned correctly.
*/
int sqlite3ExprCode(Parse *pParse, Expr *pExpr, int target){
  Vdbe *v = pParse->pVdbe;
  int op;
  int inReg = 0;
  int stackChng = 0;
  int origTarget = target;

  assert( v!=0 || pParse->db->mallocFailed );
  if( v==0 ) return 0;
  if( target<0 ){
    target = ++pParse->nMem;
  }else if( target==0 ){
    stackChng = 1;
  }

  if( pExpr==0 ){
    op = TK_NULL;
  }else{
    op = pExpr->op;
  }







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** the make process cause these values to align.  Assert()s in the code
** below verify that the numbers are aligned correctly.
*/
int sqlite3ExprCode(Parse *pParse, Expr *pExpr, int target){
  Vdbe *v = pParse->pVdbe;
  int op;
  int inReg = 0;

  int origTarget = target;

  assert( v!=0 || pParse->db->mallocFailed );
  if( v==0 ) return 0;
  if( target<0 ){
    target = ++pParse->nMem;


  }

  if( pExpr==0 ){
    op = TK_NULL;
  }else{
    op = pExpr->op;
  }
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        break;
      }
      /* Otherwise, fall thru into the TK_COLUMN case */
    }
    case TK_COLUMN: {
      if( pExpr->iTable<0 ){
        /* This only happens when coding check constraints */
        assert( pParse->ckOffset>0 );
        sqlite3VdbeAddOp1(v, OP_SCopy, -(pParse->ckOffset-pExpr->iColumn-1));
        /* inReg = -(pParse->ckOffset-pExpr->iColumn-1); */
      }else{
        sqlite3ExprCodeGetColumn(v, pExpr->pTab,
                                 pExpr->iColumn, pExpr->iTable, target);
        inReg = target;
      }
      break;
    }







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<
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        break;
      }
      /* Otherwise, fall thru into the TK_COLUMN case */
    }
    case TK_COLUMN: {
      if( pExpr->iTable<0 ){
        /* This only happens when coding check constraints */
        assert( pParse->ckBase>0 );

        inReg = pExpr->iColumn + pParse->ckBase;
      }else{
        sqlite3ExprCodeGetColumn(v, pExpr->pTab,
                                 pExpr->iColumn, pExpr->iTable, target);
        inReg = target;
      }
      break;
    }
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      to_op = aff - SQLITE_AFF_TEXT + OP_ToText;
      assert( to_op==OP_ToText    || aff!=SQLITE_AFF_TEXT    );
      assert( to_op==OP_ToBlob    || aff!=SQLITE_AFF_NONE    );
      assert( to_op==OP_ToNumeric || aff!=SQLITE_AFF_NUMERIC );
      assert( to_op==OP_ToInt     || aff!=SQLITE_AFF_INTEGER );
      assert( to_op==OP_ToReal    || aff!=SQLITE_AFF_REAL    );
      sqlite3VdbeAddOp1(v, to_op, target);
      stackChng = 0;
      inReg = target;
      break;
    }
#endif /* SQLITE_OMIT_CAST */
    case TK_LT:
    case TK_LE:
    case TK_GT:
    case TK_GE:
    case TK_NE:
    case TK_EQ: {
      assert( TK_LT==OP_Lt );
      assert( TK_LE==OP_Le );
      assert( TK_GT==OP_Gt );
      assert( TK_GE==OP_Ge );
      assert( TK_EQ==OP_Eq );
      assert( TK_NE==OP_Ne );
      sqlite3ExprCode(pParse, pExpr->pLeft, 0);
      sqlite3ExprCode(pParse, pExpr->pRight, 0);
      codeCompare(pParse, pExpr->pLeft, pExpr->pRight, op, 0, 0);
      stackChng = -1;
      break;
    }
    case TK_AND:
    case TK_OR:
    case TK_PLUS:
    case TK_STAR:
    case TK_MINUS:







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      to_op = aff - SQLITE_AFF_TEXT + OP_ToText;
      assert( to_op==OP_ToText    || aff!=SQLITE_AFF_TEXT    );
      assert( to_op==OP_ToBlob    || aff!=SQLITE_AFF_NONE    );
      assert( to_op==OP_ToNumeric || aff!=SQLITE_AFF_NUMERIC );
      assert( to_op==OP_ToInt     || aff!=SQLITE_AFF_INTEGER );
      assert( to_op==OP_ToReal    || aff!=SQLITE_AFF_REAL    );
      sqlite3VdbeAddOp1(v, to_op, target);

      inReg = target;
      break;
    }
#endif /* SQLITE_OMIT_CAST */
    case TK_LT:
    case TK_LE:
    case TK_GT:
    case TK_GE:
    case TK_NE:
    case TK_EQ: {
      assert( TK_LT==OP_Lt );
      assert( TK_LE==OP_Le );
      assert( TK_GT==OP_Gt );
      assert( TK_GE==OP_Ge );
      assert( TK_EQ==OP_Eq );
      assert( TK_NE==OP_Ne );
      sqlite3ExprCode(pParse, pExpr->pLeft, 0);
      sqlite3ExprCode(pParse, pExpr->pRight, 0);
      codeCompare(pParse, pExpr->pLeft, pExpr->pRight, op, 0, 0);

      break;
    }
    case TK_AND:
    case TK_OR:
    case TK_PLUS:
    case TK_STAR:
    case TK_MINUS:
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      assert( TK_REM==OP_Remainder );
      assert( TK_BITAND==OP_BitAnd );
      assert( TK_BITOR==OP_BitOr );
      assert( TK_SLASH==OP_Divide );
      assert( TK_LSHIFT==OP_ShiftLeft );
      assert( TK_RSHIFT==OP_ShiftRight );
      assert( TK_CONCAT==OP_Concat );
      r1 = sqlite3ExprCode(pParse, pExpr->pLeft, 0);
      r2 = sqlite3ExprCode(pParse, pExpr->pRight, 0);
      sqlite3VdbeAddOp3(v, op, r2, r1, target);
      if( r1==0 ) stackChng--;
      if( r2==0 ) stackChng--;
      if( target==0 ) stackChng++;
      inReg = target;
      break;
    }
    case TK_UMINUS: {
      Expr *pLeft = pExpr->pLeft;
      assert( pLeft );
      if( pLeft->op==TK_FLOAT || pLeft->op==TK_INTEGER ){







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      assert( TK_REM==OP_Remainder );
      assert( TK_BITAND==OP_BitAnd );
      assert( TK_BITOR==OP_BitOr );
      assert( TK_SLASH==OP_Divide );
      assert( TK_LSHIFT==OP_ShiftLeft );
      assert( TK_RSHIFT==OP_ShiftRight );
      assert( TK_CONCAT==OP_Concat );
      r1 = sqlite3ExprCode(pParse, pExpr->pLeft, -1);
      r2 = sqlite3ExprCode(pParse, pExpr->pRight, -1);
      sqlite3VdbeAddOp3(v, op, r2, r1, target);



      inReg = target;
      break;
    }
    case TK_UMINUS: {
      Expr *pLeft = pExpr->pLeft;
      assert( pLeft );
      if( pLeft->op==TK_FLOAT || pLeft->op==TK_INTEGER ){
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    }
    case TK_BITNOT:
    case TK_NOT: {
      assert( TK_BITNOT==OP_BitNot );
      assert( TK_NOT==OP_Not );
      sqlite3ExprCode(pParse, pExpr->pLeft, 0);
      sqlite3VdbeAddOp0(v, op);
      stackChng = 0;
      break;
    }
    case TK_ISNULL:
    case TK_NOTNULL: {
      int addr;
      assert( TK_ISNULL==OP_IsNull );
      assert( TK_NOTNULL==OP_NotNull );
      sqlite3VdbeAddOp2(v, OP_Integer, 1, target);
      sqlite3ExprCode(pParse, pExpr->pLeft, 0);
      addr = sqlite3VdbeAddOp0(v, op);
      sqlite3VdbeAddOp2(v, OP_AddImm, target, -1);
      sqlite3VdbeJumpHere(v, addr);
      stackChng = 0;
      inReg = target;
      break;
    }
    case TK_AGG_FUNCTION: {
      AggInfo *pInfo = pExpr->pAggInfo;
      if( pInfo==0 ){
        sqlite3ErrorMsg(pParse, "misuse of aggregate: %T",







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    }
    case TK_BITNOT:
    case TK_NOT: {
      assert( TK_BITNOT==OP_BitNot );
      assert( TK_NOT==OP_Not );
      sqlite3ExprCode(pParse, pExpr->pLeft, 0);
      sqlite3VdbeAddOp0(v, op);

      break;
    }
    case TK_ISNULL:
    case TK_NOTNULL: {
      int addr;
      assert( TK_ISNULL==OP_IsNull );
      assert( TK_NOTNULL==OP_NotNull );
      sqlite3VdbeAddOp2(v, OP_Integer, 1, target);
      sqlite3ExprCode(pParse, pExpr->pLeft, 0);
      addr = sqlite3VdbeAddOp0(v, op);
      sqlite3VdbeAddOp2(v, OP_AddImm, target, -1);
      sqlite3VdbeJumpHere(v, addr);

      inReg = target;
      break;
    }
    case TK_AGG_FUNCTION: {
      AggInfo *pInfo = pExpr->pAggInfo;
      if( pInfo==0 ){
        sqlite3ErrorMsg(pParse, "misuse of aggregate: %T",
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      }
      if( pDef->needCollSeq ){
        if( !pColl ) pColl = pParse->db->pDfltColl; 
        sqlite3VdbeAddOp4(v, OP_CollSeq, 0, 0, 0, (char *)pColl, P4_COLLSEQ);
      }
      sqlite3VdbeAddOp4(v, OP_Function, constMask, nExpr, 0,
                        (char*)pDef, P4_FUNCDEF);
      stackChng = 1-nExpr;
      break;
    }
#ifndef SQLITE_OMIT_SUBQUERY
    case TK_EXISTS:
    case TK_SELECT: {
      if( pExpr->iColumn==0 ){
        sqlite3CodeSubselect(pParse, pExpr);
      }
      inReg = pExpr->iColumn;
      /* sqlite3VdbeAddOp1(v, OP_SCopy, pExpr->iColumn);
      VdbeComment((v, "load subquery result")); */
      break;
    }
    case TK_IN: {
      int j1, j2, j3, j4, j5;
      char affinity;
      int ckOffset = pParse->ckOffset;
      int eType;

      eType = sqlite3FindInIndex(pParse, pExpr, 0);

      /* Figure out the affinity to use to create a key from the results
      ** of the expression. affinityStr stores a static string suitable for
      ** P4 of OP_MakeRecord.
      */
      affinity = comparisonAffinity(pExpr);

      sqlite3VdbeAddOp1(v, OP_Integer, 1);
      pParse->ckOffset = (ckOffset ? (ckOffset+1) : 0);

      /* Code the <expr> from "<expr> IN (...)". The temporary table
      ** pExpr->iTable contains the values that make up the (...) set.
      */
      sqlite3ExprCode(pParse, pExpr->pLeft, 0);
      sqlite3VdbeAddOp0(v, OP_SCopy);
      j1 = sqlite3VdbeAddOp0(v, OP_NotNull);







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      }
      if( pDef->needCollSeq ){
        if( !pColl ) pColl = pParse->db->pDfltColl; 
        sqlite3VdbeAddOp4(v, OP_CollSeq, 0, 0, 0, (char *)pColl, P4_COLLSEQ);
      }
      sqlite3VdbeAddOp4(v, OP_Function, constMask, nExpr, 0,
                        (char*)pDef, P4_FUNCDEF);

      break;
    }
#ifndef SQLITE_OMIT_SUBQUERY
    case TK_EXISTS:
    case TK_SELECT: {
      if( pExpr->iColumn==0 ){
        sqlite3CodeSubselect(pParse, pExpr);
      }
      inReg = pExpr->iColumn;
      /* sqlite3VdbeAddOp1(v, OP_SCopy, pExpr->iColumn);
      VdbeComment((v, "load subquery result")); */
      break;
    }
    case TK_IN: {
      int j1, j2, j3, j4, j5;
      char affinity;

      int eType;

      eType = sqlite3FindInIndex(pParse, pExpr, 0);

      /* Figure out the affinity to use to create a key from the results
      ** of the expression. affinityStr stores a static string suitable for
      ** P4 of OP_MakeRecord.
      */
      affinity = comparisonAffinity(pExpr);

      sqlite3VdbeAddOp1(v, OP_Integer, 1);


      /* Code the <expr> from "<expr> IN (...)". The temporary table
      ** pExpr->iTable contains the values that make up the (...) set.
      */
      sqlite3ExprCode(pParse, pExpr->pLeft, 0);
      sqlite3VdbeAddOp0(v, OP_SCopy);
      j1 = sqlite3VdbeAddOp0(v, OP_NotNull);
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      sqlite3ExprCode(pParse, pRight, 0);
      codeCompare(pParse, pLeft, pRight, OP_Le, 0, 0);
      sqlite3VdbeAddOp0(v, OP_And);
      break;
    }
    case TK_UPLUS: {
      inReg = sqlite3ExprCode(pParse, pExpr->pLeft, origTarget);
      stackChng = 0;
      break;
    }
    case TK_CASE: {
      int expr_end_label;
      int jumpInst;
      int nExpr;
      int i;







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      sqlite3ExprCode(pParse, pRight, 0);
      codeCompare(pParse, pLeft, pRight, OP_Le, 0, 0);
      sqlite3VdbeAddOp0(v, OP_And);
      break;
    }
    case TK_UPLUS: {
      inReg = sqlite3ExprCode(pParse, pExpr->pLeft, origTarget);

      break;
    }
    case TK_CASE: {
      int expr_end_label;
      int jumpInst;
      int nExpr;
      int i;
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                        (char*)pExpr->token.z, pExpr->token.n);
      } else {
         assert( pExpr->iColumn == OE_Ignore );
         sqlite3VdbeAddOp2(v, OP_ContextPop, 0, 0);
         sqlite3VdbeAddOp2(v, OP_Goto, 0, pParse->trigStack->ignoreJump);
         VdbeComment((v, "raise(IGNORE)"));
      }
      stackChng = 0;
      break;
    }
#endif
  }
  if( inReg!=target ){
    if( origTarget!=-1 ){
      sqlite3VdbeAddOp2(v, (inReg>0 ? OP_SCopy : OP_Move), inReg, target);
    }else{
      target = inReg;
    }
    stackChng = 0;
  }
  if( pParse->ckOffset ){
    pParse->ckOffset += stackChng;
    assert( pParse->ckOffset );
  }
  return target;
}

#ifndef SQLITE_OMIT_TRIGGER
/*
** Generate code that evalutes the given expression and leaves the result







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                        (char*)pExpr->token.z, pExpr->token.n);
      } else {
         assert( pExpr->iColumn == OE_Ignore );
         sqlite3VdbeAddOp2(v, OP_ContextPop, 0, 0);
         sqlite3VdbeAddOp2(v, OP_Goto, 0, pParse->trigStack->ignoreJump);
         VdbeComment((v, "raise(IGNORE)"));
      }

      break;
    }
#endif
  }
  if( inReg!=target ){
    if( origTarget!=-1 ){
      sqlite3VdbeAddOp2(v, (inReg>0 ? OP_SCopy : OP_Move), inReg, target);
    }else{
      target = inReg;
    }





  }
  return target;
}

#ifndef SQLITE_OMIT_TRIGGER
/*
** Generate code that evalutes the given expression and leaves the result
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
** operation.  Special comments in vdbe.c and the mkopcodeh.awk script in
** the make process cause these values to align.  Assert()s in the code
** below verify that the numbers are aligned correctly.
*/
void sqlite3ExprIfTrue(Parse *pParse, Expr *pExpr, int dest, int jumpIfNull){
  Vdbe *v = pParse->pVdbe;
  int op = 0;
  int ckOffset = pParse->ckOffset;
  if( v==0 || pExpr==0 ) return;
  op = pExpr->op;
  switch( op ){
    case TK_AND: {
      int d2 = sqlite3VdbeMakeLabel(v);
      sqlite3ExprIfFalse(pParse, pExpr->pLeft, d2, !jumpIfNull);
      sqlite3ExprIfTrue(pParse, pExpr->pRight, dest, jumpIfNull);







<







2418
2419
2420
2421
2422
2423
2424

2425
2426
2427
2428
2429
2430
2431
** operation.  Special comments in vdbe.c and the mkopcodeh.awk script in
** the make process cause these values to align.  Assert()s in the code
** below verify that the numbers are aligned correctly.
*/
void sqlite3ExprIfTrue(Parse *pParse, Expr *pExpr, int dest, int jumpIfNull){
  Vdbe *v = pParse->pVdbe;
  int op = 0;

  if( v==0 || pExpr==0 ) return;
  op = pExpr->op;
  switch( op ){
    case TK_AND: {
      int d2 = sqlite3VdbeMakeLabel(v);
      sqlite3ExprIfFalse(pParse, pExpr->pLeft, d2, !jumpIfNull);
      sqlite3ExprIfTrue(pParse, pExpr->pRight, dest, jumpIfNull);
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
    }
    default: {
      sqlite3ExprCode(pParse, pExpr, 0);
      sqlite3VdbeAddOp2(v, OP_If, jumpIfNull, dest);
      break;
    }
  }
  pParse->ckOffset = ckOffset;
}

/*
** Generate code for a boolean expression such that a jump is made
** to the label "dest" if the expression is false but execution
** continues straight thru if the expression is true.
**
** If the expression evaluates to NULL (neither true nor false) then
** jump if jumpIfNull is true or fall through if jumpIfNull is false.
*/
void sqlite3ExprIfFalse(Parse *pParse, Expr *pExpr, int dest, int jumpIfNull){
  Vdbe *v = pParse->pVdbe;
  int op = 0;
  int ckOffset = pParse->ckOffset;
  if( v==0 || pExpr==0 ) return;

  /* The value of pExpr->op and op are related as follows:
  **
  **       pExpr->op            op
  **       ---------          ----------
  **       TK_ISNULL          OP_NotNull







<













<







2492
2493
2494
2495
2496
2497
2498

2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511

2512
2513
2514
2515
2516
2517
2518
    }
    default: {
      sqlite3ExprCode(pParse, pExpr, 0);
      sqlite3VdbeAddOp2(v, OP_If, jumpIfNull, dest);
      break;
    }
  }

}

/*
** Generate code for a boolean expression such that a jump is made
** to the label "dest" if the expression is false but execution
** continues straight thru if the expression is true.
**
** If the expression evaluates to NULL (neither true nor false) then
** jump if jumpIfNull is true or fall through if jumpIfNull is false.
*/
void sqlite3ExprIfFalse(Parse *pParse, Expr *pExpr, int dest, int jumpIfNull){
  Vdbe *v = pParse->pVdbe;
  int op = 0;

  if( v==0 || pExpr==0 ) return;

  /* The value of pExpr->op and op are related as follows:
  **
  **       pExpr->op            op
  **       ---------          ----------
  **       TK_ISNULL          OP_NotNull
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
    }
    default: {
      sqlite3ExprCode(pParse, pExpr, 0);
      sqlite3VdbeAddOp2(v, OP_IfNot, jumpIfNull, dest);
      break;
    }
  }
  pParse->ckOffset = ckOffset;
}

/*
** Do a deep comparison of two expression trees.  Return TRUE (non-zero)
** if they are identical and return FALSE if they differ in any way.
**
** Sometimes this routine will return FALSE even if the two expressions







<







2601
2602
2603
2604
2605
2606
2607

2608
2609
2610
2611
2612
2613
2614
    }
    default: {
      sqlite3ExprCode(pParse, pExpr, 0);
      sqlite3VdbeAddOp2(v, OP_IfNot, jumpIfNull, dest);
      break;
    }
  }

}

/*
** Do a deep comparison of two expression trees.  Return TRUE (non-zero)
** if they are identical and return FALSE if they differ in any way.
**
** Sometimes this routine will return FALSE even if the two expressions
Changes to src/insert.c.
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
**    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 1.215 2008/01/07 19:20:25 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:







|







8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
**    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 1.216 2008/01/08 02:57:56 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:
369
370
371
372
373
374
375

376
377
378
379
380
381
382
  int regFromSelect;    /* Base register for data coming from SELECT */
  int regAutoinc = 0;   /* Register holding the AUTOINCREMENT counter */
  int regRowCount = 0;  /* Memory cell used for the row counter */
  int regIns;           /* Block of regs holding rowid+data being inserted */
  int regRowid;         /* registers holding insert rowid */
  int regData;          /* register holding first column to insert */
  int regRecord;        /* Holds the assemblied row record */



#ifndef SQLITE_OMIT_TRIGGER
  int isView;                 /* True if attempting to insert into a view */
  int triggers_exist = 0;     /* True if there are FOR EACH ROW triggers */
#endif








>







369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
  int regFromSelect;    /* Base register for data coming from SELECT */
  int regAutoinc = 0;   /* Register holding the AUTOINCREMENT counter */
  int regRowCount = 0;  /* Memory cell used for the row counter */
  int regIns;           /* Block of regs holding rowid+data being inserted */
  int regRowid;         /* registers holding insert rowid */
  int regData;          /* register holding first column to insert */
  int regRecord;        /* Holds the assemblied row record */
  int *aRegIdx = 0;     /* One register allocated to each index */


#ifndef SQLITE_OMIT_TRIGGER
  int isView;                 /* True if attempting to insert into a view */
  int triggers_exist = 0;     /* True if there are FOR EACH ROW triggers */
#endif

627
628
629
630
631
632
633



634
635







636
637
638
639
640
641
642
  if( db->flags & SQLITE_CountRows ){
    regRowCount = ++pParse->nMem;
    sqlite3VdbeAddOp2(v, OP_Integer, 0, regRowCount);
  }

  /* If this is not a view, open the table and and all indices */
  if( !isView ){



    base = pParse->nTab;
    sqlite3OpenTableAndIndices(pParse, pTab, base, OP_OpenWrite);







  }

  /* If the data source is a temporary table, then we have to create
  ** a loop because there might be multiple rows of data.  If the data
  ** source is a subroutine call from the SELECT statement, then we need
  ** to launch the SELECT statement processing.
  */







>
>
>

|
>
>
>
>
>
>
>







628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
  if( db->flags & SQLITE_CountRows ){
    regRowCount = ++pParse->nMem;
    sqlite3VdbeAddOp2(v, OP_Integer, 0, regRowCount);
  }

  /* If this is not a view, open the table and and all indices */
  if( !isView ){
    int nIdx;
    int i;

    base = pParse->nTab;
    nIdx = sqlite3OpenTableAndIndices(pParse, pTab, base, OP_OpenWrite);
    aRegIdx = sqlite3DbMallocZero(db, sizeof(int)*(nIdx+1));
    if( aRegIdx==0 ){
      goto insert_cleanup;
    }
    for(i=0; i<nIdx; i++){
      aRegIdx[i] = ++pParse->nMem;
    }
  }

  /* If the data source is a temporary table, then we have to create
  ** a loop because there might be multiple rows of data.  If the data
  ** source is a subroutine call from the SELECT statement, then we need
  ** to launch the SELECT statement processing.
  */
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
      pParse->pVirtualLock = pTab;
      sqlite3VdbeAddOp4(v, OP_VUpdate, 1, pTab->nCol+2, regIns,
                     (const char*)pTab->pVtab, P4_VTAB);
    }else
#endif
    {
      sqlite3RegToStack(pParse, regIns, pTab->nCol+1);
      sqlite3GenerateConstraintChecks(pParse, pTab, base, 0, keyColumn>=0,
                                     0, onError, endOfLoop);
      sqlite3CompleteInsertion(pParse, pTab, base, 0,0,0,
                            (triggers_exist & TRIGGER_AFTER)!=0 ? newIdx : -1,
                            appendFlag);
    }
  }

  /* Update the count of rows that are inserted
  */







|

|







837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
      pParse->pVirtualLock = pTab;
      sqlite3VdbeAddOp4(v, OP_VUpdate, 1, pTab->nCol+2, regIns,
                     (const char*)pTab->pVtab, P4_VTAB);
    }else
#endif
    {
      sqlite3RegToStack(pParse, regIns, pTab->nCol+1);
      sqlite3GenerateConstraintChecks(pParse, pTab, base, aRegIdx, keyColumn>=0,
                                     0, onError, endOfLoop);
      sqlite3CompleteInsertion(pParse, pTab, base, aRegIdx,0,0,
                            (triggers_exist & TRIGGER_AFTER)!=0 ? newIdx : -1,
                            appendFlag);
    }
  }

  /* Update the count of rows that are inserted
  */
891
892
893
894
895
896
897

898
899
900
901
902
903
904
  }

insert_cleanup:
  sqlite3SrcListDelete(pTabList);
  sqlite3ExprListDelete(pList);
  sqlite3SelectDelete(pSelect);
  sqlite3IdListDelete(pColumn);

}

/*
** Generate code to do constraint checks prior to an INSERT or an UPDATE.
**
** When this routine is called, the stack contains (from bottom to top)
** the following values:







>







902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
  }

insert_cleanup:
  sqlite3SrcListDelete(pTabList);
  sqlite3ExprListDelete(pList);
  sqlite3SelectDelete(pSelect);
  sqlite3IdListDelete(pColumn);
  sqlite3_free(aRegIdx);
}

/*
** Generate code to do constraint checks prior to an INSERT or an UPDATE.
**
** When this routine is called, the stack contains (from bottom to top)
** the following values:
915
916
917
918
919
920
921
922
923

924
925
926
927
928
929
930
931
932
933
**
**    N.  The data in the last column of the entry after the update.
**
** The old rowid shown as entry (1) above is omitted unless both isUpdate
** and rowidChng are 1.  isUpdate is true for UPDATEs and false for
** INSERTs and rowidChng is true if the record number is being changed.
**
** The code generated by this routine pushes additional entries onto
** the stack which are the keys for new index entries for the new record.

** The order of index keys is the same as the order of the indices on
** the pTable->pIndex list.  A key is only created for index i if 
** aIdxUsed!=0 and aIdxUsed[i]!=0.
**
** This routine also generates code to check constraints.  NOT NULL,
** CHECK, and UNIQUE constraints are all checked.  If a constraint fails,
** then the appropriate action is performed.  There are five possible
** actions: ROLLBACK, ABORT, FAIL, REPLACE, and IGNORE.
**
**  Constraint type  Action       What Happens







|
|
>
|
<
|







927
928
929
930
931
932
933
934
935
936
937

938
939
940
941
942
943
944
945
**
**    N.  The data in the last column of the entry after the update.
**
** The old rowid shown as entry (1) above is omitted unless both isUpdate
** and rowidChng are 1.  isUpdate is true for UPDATEs and false for
** INSERTs and rowidChng is true if the record number is being changed.
**
** The code generated by this routine store new index entries into
** registers identified by aRegIdx[].  No index entry is created for
** indices where aRegIdx[i]==0.  The order of indices in aRegIdx[] is
** the same as the order of indices on the linked list of indices

** attached to the table.
**
** This routine also generates code to check constraints.  NOT NULL,
** CHECK, and UNIQUE constraints are all checked.  If a constraint fails,
** then the appropriate action is performed.  There are five possible
** actions: ROLLBACK, ABORT, FAIL, REPLACE, and IGNORE.
**
**  Constraint type  Action       What Happens
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999


1000
1001
1002
1003
1004







1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043

1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
** is used.  Or if pParse->onError==OE_Default then the onError value
** for the constraint is used.
**
** The calling routine must open a read/write cursor for pTab with
** cursor number "base".  All indices of pTab must also have open
** read/write cursors with cursor number base+i for the i-th cursor.
** Except, if there is no possibility of a REPLACE action then
** cursors do not need to be open for indices where aIdxUsed[i]==0.
**
** If the isUpdate flag is true, it means that the "base" cursor is
** initially pointing to an entry that is being updated.  The isUpdate
** flag causes extra code to be generated so that the "base" cursor
** is still pointing at the same entry after the routine returns.
** Without the isUpdate flag, the "base" cursor might be moved.
*/
void sqlite3GenerateConstraintChecks(
  Parse *pParse,      /* The parser context */
  Table *pTab,        /* the table into which we are inserting */
  int base,           /* Index of a read/write cursor pointing at pTab */
  char *aIdxUsed,     /* Which indices are used.  NULL means all are used */
  int rowidChng,      /* True if the record number will change */
  int isUpdate,       /* True for UPDATE, False for INSERT */
  int overrideError,  /* Override onError to this if not OE_Default */
  int ignoreDest      /* Jump to this label on an OE_Ignore resolution */
){
  int i;
  Vdbe *v;
  int nCol;
  int onError;
  int addr;
  int extra;
  int iCur;
  Index *pIdx;
  int seenReplace = 0;
  int jumpInst1=0, jumpInst2;
  int hasTwoRowids = (isUpdate && rowidChng);



  v = sqlite3GetVdbe(pParse);
  assert( v!=0 );
  assert( pTab->pSelect==0 );  /* This table is not a VIEW */
  nCol = pTab->nCol;








  /* Test all NOT NULL constraints.
  */
  for(i=0; i<nCol; i++){
    if( i==pTab->iPKey ){
      continue;
    }
    onError = pTab->aCol[i].notNull;
    if( onError==OE_None ) continue;
    if( overrideError!=OE_Default ){
      onError = overrideError;
    }else if( onError==OE_Default ){
      onError = OE_Abort;
    }
    if( onError==OE_Replace && pTab->aCol[i].pDflt==0 ){
      onError = OE_Abort;
    }
    sqlite3VdbeAddOp1(v, OP_SCopy, -(nCol-1-i));
    addr = sqlite3VdbeAddOp0(v, OP_NotNull);
    assert( onError==OE_Rollback || onError==OE_Abort || onError==OE_Fail
        || onError==OE_Ignore || onError==OE_Replace );
    switch( onError ){
      case OE_Rollback:
      case OE_Abort:
      case OE_Fail: {
        char *zMsg = 0;
        sqlite3VdbeAddOp2(v, OP_Halt, SQLITE_CONSTRAINT, onError);
        sqlite3SetString(&zMsg, pTab->zName, ".", pTab->aCol[i].zName,
                        " may not be NULL", (char*)0);
        sqlite3VdbeChangeP4(v, -1, zMsg, P4_DYNAMIC);
        break;
      }
      case OE_Ignore: {
        sqlite3VdbeAddOp2(v, OP_Pop, nCol+1+hasTwoRowids, 0);
        sqlite3VdbeAddOp2(v, OP_Goto, 0, ignoreDest);
        break;
      }
      case OE_Replace: {
        sqlite3ExprCode(pParse, pTab->aCol[i].pDflt, 0);

        sqlite3VdbeAddOp1(v, OP_Push, nCol-i);
        break;
      }
    }
    sqlite3VdbeJumpHere(v, addr);
  }

  /* Test all CHECK constraints
  */
#ifndef SQLITE_OMIT_CHECK
  if( pTab->pCheck && (pParse->db->flags & SQLITE_IgnoreChecks)==0 ){
    int allOk = sqlite3VdbeMakeLabel(v);
    assert( pParse->ckOffset==0 );
    pParse->ckOffset = nCol;
    sqlite3ExprIfTrue(pParse, pTab->pCheck, allOk, 1);
    assert( pParse->ckOffset==nCol );
    pParse->ckOffset = 0;
    onError = overrideError!=OE_Default ? overrideError : OE_Abort;
    if( onError==OE_Ignore ){
      sqlite3VdbeAddOp2(v, OP_Pop, nCol+1+hasTwoRowids, 0);
      sqlite3VdbeAddOp2(v, OP_Goto, 0, ignoreDest);
    }else{
      sqlite3VdbeAddOp2(v, OP_Halt, SQLITE_CONSTRAINT, onError);
    }







|











|









|
<



<

>
>





>
>
>
>
>
>
>

















|
<




















>




|







<
|

<
<







976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005

1006
1007
1008

1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041

1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074

1075
1076


1077
1078
1079
1080
1081
1082
1083
** is used.  Or if pParse->onError==OE_Default then the onError value
** for the constraint is used.
**
** The calling routine must open a read/write cursor for pTab with
** cursor number "base".  All indices of pTab must also have open
** read/write cursors with cursor number base+i for the i-th cursor.
** Except, if there is no possibility of a REPLACE action then
** cursors do not need to be open for indices where aRegIdx[i]==0.
**
** If the isUpdate flag is true, it means that the "base" cursor is
** initially pointing to an entry that is being updated.  The isUpdate
** flag causes extra code to be generated so that the "base" cursor
** is still pointing at the same entry after the routine returns.
** Without the isUpdate flag, the "base" cursor might be moved.
*/
void sqlite3GenerateConstraintChecks(
  Parse *pParse,      /* The parser context */
  Table *pTab,        /* the table into which we are inserting */
  int base,           /* Index of a read/write cursor pointing at pTab */
  int *aRegIdx,       /* Register used by each index.  0 for unused indices */
  int rowidChng,      /* True if the record number will change */
  int isUpdate,       /* True for UPDATE, False for INSERT */
  int overrideError,  /* Override onError to this if not OE_Default */
  int ignoreDest      /* Jump to this label on an OE_Ignore resolution */
){
  int i;
  Vdbe *v;
  int nCol;
  int onError;
  int j1, j2, j3;     /* Address of jump instructions */

  int iCur;
  Index *pIdx;
  int seenReplace = 0;

  int hasTwoRowids = (isUpdate && rowidChng);

  int regRowid, regData;

  v = sqlite3GetVdbe(pParse);
  assert( v!=0 );
  assert( pTab->pSelect==0 );  /* This table is not a VIEW */
  nCol = pTab->nCol;

  /* Copy rowids and data into registers 
  */
  regRowid = sqlite3StackToReg(pParse, nCol+1+hasTwoRowids);
  sqlite3RegToStack(pParse, regRowid, nCol+1+hasTwoRowids);
  if( hasTwoRowids ) regRowid++;
  regData = regRowid+1;

  /* Test all NOT NULL constraints.
  */
  for(i=0; i<nCol; i++){
    if( i==pTab->iPKey ){
      continue;
    }
    onError = pTab->aCol[i].notNull;
    if( onError==OE_None ) continue;
    if( overrideError!=OE_Default ){
      onError = overrideError;
    }else if( onError==OE_Default ){
      onError = OE_Abort;
    }
    if( onError==OE_Replace && pTab->aCol[i].pDflt==0 ){
      onError = OE_Abort;
    }
    j1 = sqlite3VdbeAddOp1(v, OP_NotNull, regData+i);

    assert( onError==OE_Rollback || onError==OE_Abort || onError==OE_Fail
        || onError==OE_Ignore || onError==OE_Replace );
    switch( onError ){
      case OE_Rollback:
      case OE_Abort:
      case OE_Fail: {
        char *zMsg = 0;
        sqlite3VdbeAddOp2(v, OP_Halt, SQLITE_CONSTRAINT, onError);
        sqlite3SetString(&zMsg, pTab->zName, ".", pTab->aCol[i].zName,
                        " may not be NULL", (char*)0);
        sqlite3VdbeChangeP4(v, -1, zMsg, P4_DYNAMIC);
        break;
      }
      case OE_Ignore: {
        sqlite3VdbeAddOp2(v, OP_Pop, nCol+1+hasTwoRowids, 0);
        sqlite3VdbeAddOp2(v, OP_Goto, 0, ignoreDest);
        break;
      }
      case OE_Replace: {
        sqlite3ExprCode(pParse, pTab->aCol[i].pDflt, 0);
        sqlite3VdbeAddOp2(v, OP_Copy, 0, regData+i);
        sqlite3VdbeAddOp1(v, OP_Push, nCol-i);
        break;
      }
    }
    sqlite3VdbeJumpHere(v, j1);
  }

  /* Test all CHECK constraints
  */
#ifndef SQLITE_OMIT_CHECK
  if( pTab->pCheck && (pParse->db->flags & SQLITE_IgnoreChecks)==0 ){
    int allOk = sqlite3VdbeMakeLabel(v);

    pParse->ckBase = regData;
    sqlite3ExprIfTrue(pParse, pTab->pCheck, allOk, 1);


    onError = overrideError!=OE_Default ? overrideError : OE_Abort;
    if( onError==OE_Ignore ){
      sqlite3VdbeAddOp2(v, OP_Pop, nCol+1+hasTwoRowids, 0);
      sqlite3VdbeAddOp2(v, OP_Goto, 0, ignoreDest);
    }else{
      sqlite3VdbeAddOp2(v, OP_Halt, SQLITE_CONSTRAINT, onError);
    }
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    if( overrideError!=OE_Default ){
      onError = overrideError;
    }else if( onError==OE_Default ){
      onError = OE_Abort;
    }
    
    if( isUpdate ){
      sqlite3VdbeAddOp1(v, OP_SCopy, -(nCol+1));
      sqlite3VdbeAddOp1(v, OP_SCopy, -(nCol+1));
      jumpInst1 = sqlite3VdbeAddOp2(v, OP_Eq, 0, 0);
    }
    sqlite3VdbeAddOp1(v, OP_SCopy, -nCol);
    jumpInst2 = sqlite3VdbeAddOp2(v, OP_NotExists, base, 0);
    switch( onError ){
      default: {
        onError = OE_Abort;
        /* Fall thru into the next case */
      }
      case OE_Rollback:
      case OE_Abort:
      case OE_Fail: {
        sqlite3VdbeAddOp4(v, OP_Halt, SQLITE_CONSTRAINT, onError, 0,
                         "PRIMARY KEY must be unique", P4_STATIC);
        break;
      }
      case OE_Replace: {
        sqlite3GenerateRowIndexDelete(v, pTab, base, 0);
        if( isUpdate ){
          sqlite3VdbeAddOp1(v, OP_SCopy, -(nCol+hasTwoRowids));
          sqlite3VdbeAddOp2(v, OP_MoveGe, base, 0);
        }
        seenReplace = 1;
        break;
      }
      case OE_Ignore: {
        assert( seenReplace==0 );
        sqlite3VdbeAddOp2(v, OP_Pop, nCol+1+hasTwoRowids, 0);
        sqlite3VdbeAddOp2(v, OP_Goto, 0, ignoreDest);
        break;
      }
    }
    sqlite3VdbeJumpHere(v, jumpInst2);
    if( isUpdate ){
      sqlite3VdbeJumpHere(v, jumpInst1);
      sqlite3VdbeAddOp1(v, OP_SCopy, -(nCol+1));
      sqlite3VdbeAddOp2(v, OP_MoveGe, base, 0);
    }
  }

  /* Test all UNIQUE constraints by creating entries for each UNIQUE
  ** index and making sure that duplicate entries do not already exist.
  ** Add the new records to the indices as we go.
  */
  extra = -1;
  for(iCur=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, iCur++){
    if( aIdxUsed && aIdxUsed[iCur]==0 ) continue;  /* Skip unused indices */
    extra++;

    /* Create a key for accessing the index entry */
    sqlite3VdbeAddOp1(v, OP_SCopy, -(nCol+extra));
    for(i=0; i<pIdx->nColumn; i++){
      int idx = pIdx->aiColumn[i];
      if( idx==pTab->iPKey ){
        sqlite3VdbeAddOp1(v, OP_SCopy, -(i+extra+nCol+1));
      }else{
        sqlite3VdbeAddOp1(v, OP_SCopy, -(i+extra+nCol-idx));
      }
    }
    jumpInst1 = sqlite3VdbeAddOp2(v, OP_MakeIdxRec, pIdx->nColumn, 0);
    sqlite3IndexAffinityStr(v, pIdx);

    /* Find out what action to take in case there is an indexing conflict */
    onError = pIdx->onError;
    if( onError==OE_None ) continue;  /* pIdx is not a UNIQUE index */
    if( overrideError!=OE_Default ){
      onError = overrideError;
    }else if( onError==OE_Default ){
      onError = OE_Abort;
    }
    if( seenReplace ){
      if( onError==OE_Ignore ) onError = OE_Replace;
      else if( onError==OE_Fail ) onError = OE_Abort;
    }
    

    /* Check to see if the new index entry will be unique */
    sqlite3VdbeAddOp1(v, OP_SCopy, -(extra+nCol+1+hasTwoRowids));

    jumpInst2 = sqlite3VdbeAddOp2(v, OP_IsUnique, base+iCur+1, 0);

    /* Generate code that executes if the new index entry is not unique */
    assert( onError==OE_Rollback || onError==OE_Abort || onError==OE_Fail
        || onError==OE_Ignore || onError==OE_Replace );
    switch( onError ){
      case OE_Rollback:
      case OE_Abort:







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    if( overrideError!=OE_Default ){
      onError = overrideError;
    }else if( onError==OE_Default ){
      onError = OE_Abort;
    }
    
    if( isUpdate ){
      sqlite3VdbeAddOp1(v, OP_SCopy, regRowid-1);
      sqlite3VdbeAddOp1(v, OP_SCopy, regRowid);
      j2 = sqlite3VdbeAddOp2(v, OP_Eq, 0, 0);
    }

    j3 = sqlite3VdbeAddOp3(v, OP_NotExists, base, 0, regRowid);
    switch( onError ){
      default: {
        onError = OE_Abort;
        /* Fall thru into the next case */
      }
      case OE_Rollback:
      case OE_Abort:
      case OE_Fail: {
        sqlite3VdbeAddOp4(v, OP_Halt, SQLITE_CONSTRAINT, onError, 0,
                         "PRIMARY KEY must be unique", P4_STATIC);
        break;
      }
      case OE_Replace: {
        sqlite3GenerateRowIndexDelete(v, pTab, base, 0);
        if( isUpdate ){
          sqlite3VdbeAddOp1(v, OP_SCopy, regRowid-hasTwoRowids);
          sqlite3VdbeAddOp2(v, OP_MoveGe, base, 0);
        }
        seenReplace = 1;
        break;
      }
      case OE_Ignore: {
        assert( seenReplace==0 );
        sqlite3VdbeAddOp2(v, OP_Pop, nCol+1+hasTwoRowids, 0);
        sqlite3VdbeAddOp2(v, OP_Goto, 0, ignoreDest);
        break;
      }
    }
    sqlite3VdbeJumpHere(v, j3);
    if( isUpdate ){
      sqlite3VdbeJumpHere(v, j2);
      sqlite3VdbeAddOp1(v, OP_SCopy, regRowid-1);
      sqlite3VdbeAddOp2(v, OP_MoveGe, base, 0);
    }
  }

  /* Test all UNIQUE constraints by creating entries for each UNIQUE
  ** index and making sure that duplicate entries do not already exist.
  ** Add the new records to the indices as we go.
  */

  for(iCur=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, iCur++){
    if( aRegIdx[iCur]==0 ) continue;  /* Skip unused indices */


    /* Create a key for accessing the index entry */
    sqlite3VdbeAddOp1(v, OP_SCopy, regRowid);
    for(i=0; i<pIdx->nColumn; i++){
      int idx = pIdx->aiColumn[i];
      if( idx==pTab->iPKey ){
        sqlite3VdbeAddOp1(v, OP_SCopy, regRowid);
      }else{
        sqlite3VdbeAddOp1(v, OP_SCopy, regData+idx);
      }
    }
    j2 = sqlite3VdbeAddOp3(v, OP_MakeIdxRec, pIdx->nColumn, 0, aRegIdx[iCur]);
    sqlite3IndexAffinityStr(v, pIdx);

    /* Find out what action to take in case there is an indexing conflict */
    onError = pIdx->onError;
    if( onError==OE_None ) continue;  /* pIdx is not a UNIQUE index */
    if( overrideError!=OE_Default ){
      onError = overrideError;
    }else if( onError==OE_Default ){
      onError = OE_Abort;
    }
    if( seenReplace ){
      if( onError==OE_Ignore ) onError = OE_Replace;
      else if( onError==OE_Fail ) onError = OE_Abort;
    }
    

    /* Check to see if the new index entry will be unique */
    sqlite3VdbeAddOp1(v, OP_SCopy, aRegIdx[iCur]);
    sqlite3VdbeAddOp1(v, OP_SCopy, regRowid-hasTwoRowids);
    j3 = sqlite3VdbeAddOp2(v, OP_IsUnique, base+iCur+1, 0);

    /* Generate code that executes if the new index entry is not unique */
    assert( onError==OE_Rollback || onError==OE_Abort || onError==OE_Fail
        || onError==OE_Ignore || onError==OE_Replace );
    switch( onError ){
      case OE_Rollback:
      case OE_Abort:
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        sqlite3_snprintf(sizeof(zErrMsg)-n1, &zErrMsg[n1], 
            pIdx->nColumn>1 ? " are not unique" : " is not unique");
        sqlite3VdbeAddOp4(v, OP_Halt, SQLITE_CONSTRAINT, onError, 0, zErrMsg,0);
        break;
      }
      case OE_Ignore: {
        assert( seenReplace==0 );
        sqlite3VdbeAddOp2(v, OP_Pop, nCol+extra+3+hasTwoRowids, 0);
        sqlite3VdbeAddOp2(v, OP_Goto, 0, ignoreDest);
        break;
      }
      case OE_Replace: {
        int iRowid = sqlite3StackToReg(pParse, 1);
        sqlite3GenerateRowDelete(pParse->db, v, pTab, base, iRowid, 0);
        if( isUpdate ){
          sqlite3VdbeAddOp1(v, OP_SCopy, -(nCol+extra+1+hasTwoRowids));
          sqlite3VdbeAddOp2(v, OP_MoveGe, base, 0);
        }
        seenReplace = 1;
        break;
      }
    }


#if NULL_DISTINCT_FOR_UNIQUE
    sqlite3VdbeJumpHere(v, jumpInst1);
#endif
    sqlite3VdbeJumpHere(v, jumpInst2);
  }
}

/*
** This routine generates code to finish the INSERT or UPDATE operation
** that was started by a prior call to sqlite3GenerateConstraintChecks.
** The stack must contain keys for all active indices followed by data
** and the rowid for the new entry.  This routine creates the new
** entries in all indices and in the main table.
**
** The arguments to this routine should be the same as the first six
** arguments to sqlite3GenerateConstraintChecks.
*/
void sqlite3CompleteInsertion(
  Parse *pParse,      /* The parser context */
  Table *pTab,        /* the table into which we are inserting */
  int base,           /* Index of a read/write cursor pointing at pTab */
  char *aIdxUsed,     /* Which indices are used.  NULL means all are used */
  int rowidChng,      /* True if the record number will change */
  int isUpdate,       /* True for UPDATE, False for INSERT */
  int newIdx,         /* Index of NEW table for triggers.  -1 if none */
  int appendBias      /* True if this is likely to be an append */
){
  int i;
  Vdbe *v;
  int nIdx;
  Index *pIdx;
  int pik_flags;

  v = sqlite3GetVdbe(pParse);
  assert( v!=0 );
  assert( pTab->pSelect==0 );  /* This table is not a VIEW */
  for(nIdx=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, nIdx++){}
  for(i=nIdx-1; i>=0; i--){
    if( aIdxUsed && aIdxUsed[i]==0 ) continue;
    sqlite3VdbeAddOp2(v, OP_IdxInsert, base+i+1, 0);
  }
  sqlite3VdbeAddOp2(v, OP_MakeRecord, pTab->nCol, 0);
  sqlite3TableAffinityStr(v, pTab);
#ifndef SQLITE_OMIT_TRIGGER
  if( newIdx>=0 ){
    sqlite3VdbeAddOp1(v, OP_Copy, -1);
    sqlite3VdbeAddOp1(v, OP_Copy, -1);







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        sqlite3_snprintf(sizeof(zErrMsg)-n1, &zErrMsg[n1], 
            pIdx->nColumn>1 ? " are not unique" : " is not unique");
        sqlite3VdbeAddOp4(v, OP_Halt, SQLITE_CONSTRAINT, onError, 0, zErrMsg,0);
        break;
      }
      case OE_Ignore: {
        assert( seenReplace==0 );
        sqlite3VdbeAddOp2(v, OP_Pop, nCol+3+hasTwoRowids, 0);
        sqlite3VdbeAddOp2(v, OP_Goto, 0, ignoreDest);
        break;
      }
      case OE_Replace: {
        int iRowid = sqlite3StackToReg(pParse, 1);
        sqlite3GenerateRowDelete(pParse->db, v, pTab, base, iRowid, 0);
        if( isUpdate ){
          sqlite3VdbeAddOp1(v, OP_SCopy, regRowid-hasTwoRowids);
          sqlite3VdbeAddOp2(v, OP_MoveGe, base, 0);
        }
        seenReplace = 1;
        break;
      }
    }
    sqlite3VdbeJumpHere(v, j3);
    sqlite3VdbeAddOp1(v, OP_Pop, 1);
#if NULL_DISTINCT_FOR_UNIQUE
    sqlite3VdbeJumpHere(v, j2);
#endif

  }
}

/*
** This routine generates code to finish the INSERT or UPDATE operation
** that was started by a prior call to sqlite3GenerateConstraintChecks.
** The stack must contain keys for all active indices followed by data
** and the rowid for the new entry.  This routine creates the new
** entries in all indices and in the main table.
**
** The arguments to this routine should be the same as the first six
** arguments to sqlite3GenerateConstraintChecks.
*/
void sqlite3CompleteInsertion(
  Parse *pParse,      /* The parser context */
  Table *pTab,        /* the table into which we are inserting */
  int base,           /* Index of a read/write cursor pointing at pTab */
  int *aRegIdx,       /* Register used by each index.  0 for unused indices */
  int rowidChng,      /* True if the record number will change */
  int isUpdate,       /* True for UPDATE, False for INSERT */
  int newIdx,         /* Index of NEW table for triggers.  -1 if none */
  int appendBias      /* True if this is likely to be an append */
){
  int i;
  Vdbe *v;
  int nIdx;
  Index *pIdx;
  int pik_flags;

  v = sqlite3GetVdbe(pParse);
  assert( v!=0 );
  assert( pTab->pSelect==0 );  /* This table is not a VIEW */
  for(nIdx=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, nIdx++){}
  for(i=nIdx-1; i>=0; i--){
    if( aRegIdx[i]==0 ) continue;
    sqlite3VdbeAddOp2(v, OP_IdxInsert, base+i+1, aRegIdx[i]);
  }
  sqlite3VdbeAddOp2(v, OP_MakeRecord, pTab->nCol, 0);
  sqlite3TableAffinityStr(v, pTab);
#ifndef SQLITE_OMIT_TRIGGER
  if( newIdx>=0 ){
    sqlite3VdbeAddOp1(v, OP_Copy, -1);
    sqlite3VdbeAddOp1(v, OP_Copy, -1);
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  }
}

/*
** Generate code that will open cursors for a table and for all
** indices of that table.  The "base" parameter is the cursor number used
** for the table.  Indices are opened on subsequent cursors.


*/
void sqlite3OpenTableAndIndices(
  Parse *pParse,   /* Parsing context */
  Table *pTab,     /* Table to be opened */
  int base,        /* Cursor number assigned to the table */
  int op           /* OP_OpenRead or OP_OpenWrite */
){
  int i;
  int iDb;
  Index *pIdx;
  Vdbe *v;

  if( IsVirtual(pTab) ) return;
  iDb = sqlite3SchemaToIndex(pParse->db, pTab->pSchema);
  v = sqlite3GetVdbe(pParse);
  assert( v!=0 );
  sqlite3OpenTable(pParse, base, iDb, pTab, op);
  for(i=1, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
    KeyInfo *pKey = sqlite3IndexKeyinfo(pParse, pIdx);
    assert( pIdx->pSchema==pTab->pSchema );
    sqlite3VdbeAddOp4(v, op, i+base, pIdx->tnum, iDb,
                      (char*)pKey, P4_KEYINFO_HANDOFF);
    VdbeComment((v, "%s", pIdx->zName));
  }
  if( pParse->nTab<=base+i ){
    pParse->nTab = base+i;
  }

}


#ifdef SQLITE_TEST
/*
** The following global variable is incremented whenever the
** transfer optimization is used.  This is used for testing







>
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>







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  }
}

/*
** Generate code that will open cursors for a table and for all
** indices of that table.  The "base" parameter is the cursor number used
** for the table.  Indices are opened on subsequent cursors.
**
** Return the number of indices on the table.
*/
int sqlite3OpenTableAndIndices(
  Parse *pParse,   /* Parsing context */
  Table *pTab,     /* Table to be opened */
  int base,        /* Cursor number assigned to the table */
  int op           /* OP_OpenRead or OP_OpenWrite */
){
  int i;
  int iDb;
  Index *pIdx;
  Vdbe *v;

  if( IsVirtual(pTab) ) return 0;
  iDb = sqlite3SchemaToIndex(pParse->db, pTab->pSchema);
  v = sqlite3GetVdbe(pParse);
  assert( v!=0 );
  sqlite3OpenTable(pParse, base, iDb, pTab, op);
  for(i=1, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
    KeyInfo *pKey = sqlite3IndexKeyinfo(pParse, pIdx);
    assert( pIdx->pSchema==pTab->pSchema );
    sqlite3VdbeAddOp4(v, op, i+base, pIdx->tnum, iDb,
                      (char*)pKey, P4_KEYINFO_HANDOFF);
    VdbeComment((v, "%s", pIdx->zName));
  }
  if( pParse->nTab<=base+i ){
    pParse->nTab = base+i;
  }
  return i-1;
}


#ifdef SQLITE_TEST
/*
** The following global variable is incremented whenever the
** transfer optimization is used.  This is used for testing
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1624
    VdbeComment((v, "%s", pSrcIdx->zName));
    pKey = sqlite3IndexKeyinfo(pParse, pDestIdx);
    sqlite3VdbeAddOp4(v, OP_OpenWrite, iDest, pDestIdx->tnum, iDbDest,
                      (char*)pKey, P4_KEYINFO_HANDOFF);
    VdbeComment((v, "%s", pDestIdx->zName));
    addr1 = sqlite3VdbeAddOp2(v, OP_Rewind, iSrc, 0);
    sqlite3VdbeAddOp2(v, OP_RowKey, iSrc, 0);
    sqlite3VdbeAddOp2(v, OP_IdxInsert, iDest, 1);
    sqlite3VdbeAddOp2(v, OP_Next, iSrc, addr1+1);
    sqlite3VdbeJumpHere(v, addr1);
  }
  sqlite3VdbeJumpHere(v, emptySrcTest);
  sqlite3VdbeAddOp2(v, OP_Close, iSrc, 0);
  sqlite3VdbeAddOp2(v, OP_Close, iDest, 0);
  if( emptyDestTest ){







|







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    VdbeComment((v, "%s", pSrcIdx->zName));
    pKey = sqlite3IndexKeyinfo(pParse, pDestIdx);
    sqlite3VdbeAddOp4(v, OP_OpenWrite, iDest, pDestIdx->tnum, iDbDest,
                      (char*)pKey, P4_KEYINFO_HANDOFF);
    VdbeComment((v, "%s", pDestIdx->zName));
    addr1 = sqlite3VdbeAddOp2(v, OP_Rewind, iSrc, 0);
    sqlite3VdbeAddOp2(v, OP_RowKey, iSrc, 0);
    sqlite3VdbeAddOp3(v, OP_IdxInsert, iDest, 0, 1);
    sqlite3VdbeAddOp2(v, OP_Next, iSrc, addr1+1);
    sqlite3VdbeJumpHere(v, addr1);
  }
  sqlite3VdbeJumpHere(v, emptySrcTest);
  sqlite3VdbeAddOp2(v, OP_Close, iSrc, 0);
  sqlite3VdbeAddOp2(v, OP_Close, iDest, 0);
  if( emptyDestTest ){
Changes to src/sqliteInt.h.
1
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3
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5
6
7
8
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13
14
15
16
17
18
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/*
** 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 1.641 2008/01/06 00:25:22 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_

/*
** The macro unlikely() is a hint that surrounds a boolean
** expression that is usually false.  Macro likely() surrounds













|







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7
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/*
** 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 1.642 2008/01/08 02:57:56 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_

/*
** The macro unlikely() is a hint that surrounds a boolean
** expression that is usually false.  Macro likely() surrounds
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  u8 checkSchema;      /* Causes schema cookie check after an error */
  u8 nested;           /* Number of nested calls to the parser/code generator */
  u8 parseError;       /* True after a parsing error.  Ticket #1794 */
  int nErr;            /* Number of errors seen */
  int nTab;            /* Number of previously allocated VDBE cursors */
  int nMem;            /* Number of memory cells used so far */
  int nSet;            /* Number of sets used so far */
  int ckOffset;        /* Stack offset to data used by CHECK constraints */
  u32 writeMask;       /* Start a write transaction on these databases */
  u32 cookieMask;      /* Bitmask of schema verified databases */
  int cookieGoto;      /* Address of OP_Goto to cookie verifier subroutine */
  int cookieValue[SQLITE_MAX_ATTACHED+2];  /* Values of cookies to verify */
#ifndef SQLITE_OMIT_SHARED_CACHE
  int nTableLock;        /* Number of locks in aTableLock */
  TableLock *aTableLock; /* Required table locks for shared-cache mode */







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  u8 checkSchema;      /* Causes schema cookie check after an error */
  u8 nested;           /* Number of nested calls to the parser/code generator */
  u8 parseError;       /* True after a parsing error.  Ticket #1794 */
  int nErr;            /* Number of errors seen */
  int nTab;            /* Number of previously allocated VDBE cursors */
  int nMem;            /* Number of memory cells used so far */
  int nSet;            /* Number of sets used so far */
  int ckBase;          /* Base register of data during check constraints */
  u32 writeMask;       /* Start a write transaction on these databases */
  u32 cookieMask;      /* Bitmask of schema verified databases */
  int cookieGoto;      /* Address of OP_Goto to cookie verifier subroutine */
  int cookieValue[SQLITE_MAX_ATTACHED+2];  /* Values of cookies to verify */
#ifndef SQLITE_OMIT_SHARED_CACHE
  int nTableLock;        /* Number of locks in aTableLock */
  TableLock *aTableLock; /* Required table locks for shared-cache mode */
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void sqlite3RollbackTransaction(Parse*);
int sqlite3ExprIsConstant(Expr*);
int sqlite3ExprIsConstantNotJoin(Expr*);
int sqlite3ExprIsConstantOrFunction(Expr*);
int sqlite3ExprIsInteger(Expr*, int*);
int sqlite3IsRowid(const char*);
void sqlite3GenerateRowDelete(sqlite3*, Vdbe*, Table*, int, int, int);
void sqlite3GenerateRowIndexDelete(Vdbe*, Table*, int, char*);
void sqlite3GenerateIndexKey(Vdbe*, Index*, int);
void sqlite3GenerateConstraintChecks(Parse*,Table*,int,char*,int,int,int,int);
void sqlite3CompleteInsertion(Parse*, Table*, int, char*, int, int, int, int);
void sqlite3OpenTableAndIndices(Parse*, Table*, int, int);
void sqlite3BeginWriteOperation(Parse*, int, int);
Expr *sqlite3ExprDup(sqlite3*,Expr*);
void sqlite3TokenCopy(sqlite3*,Token*, Token*);
ExprList *sqlite3ExprListDup(sqlite3*,ExprList*);
SrcList *sqlite3SrcListDup(sqlite3*,SrcList*);
IdList *sqlite3IdListDup(sqlite3*,IdList*);
Select *sqlite3SelectDup(sqlite3*,Select*);







|

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|







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void sqlite3RollbackTransaction(Parse*);
int sqlite3ExprIsConstant(Expr*);
int sqlite3ExprIsConstantNotJoin(Expr*);
int sqlite3ExprIsConstantOrFunction(Expr*);
int sqlite3ExprIsInteger(Expr*, int*);
int sqlite3IsRowid(const char*);
void sqlite3GenerateRowDelete(sqlite3*, Vdbe*, Table*, int, int, int);
void sqlite3GenerateRowIndexDelete(Vdbe*, Table*, int, int*);
void sqlite3GenerateIndexKey(Vdbe*, Index*, int);
void sqlite3GenerateConstraintChecks(Parse*,Table*,int,int*,int,int,int,int);
void sqlite3CompleteInsertion(Parse*, Table*, int, int*, int, int, int, int);
int sqlite3OpenTableAndIndices(Parse*, Table*, int, int);
void sqlite3BeginWriteOperation(Parse*, int, int);
Expr *sqlite3ExprDup(sqlite3*,Expr*);
void sqlite3TokenCopy(sqlite3*,Token*, Token*);
ExprList *sqlite3ExprListDup(sqlite3*,ExprList*);
SrcList *sqlite3SrcListDup(sqlite3*,SrcList*);
IdList *sqlite3IdListDup(sqlite3*,IdList*);
Select *sqlite3SelectDup(sqlite3*,Select*);
Changes to src/update.c.
8
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**    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 UPDATE statements.
**
** $Id: update.c,v 1.162 2008/01/06 00:25:22 drh Exp $
*/
#include "sqliteInt.h"

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Forward declaration */
static void updateVirtualTable(
  Parse *pParse,       /* The parsing context */







|







8
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19
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**    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 UPDATE statements.
**
** $Id: update.c,v 1.163 2008/01/08 02:57:56 drh Exp $
*/
#include "sqliteInt.h"

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Forward declaration */
static void updateVirtualTable(
  Parse *pParse,       /* The parsing context */
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  int i, j;              /* Loop counters */
  Table *pTab;           /* The table to be updated */
  int addr = 0;          /* VDBE instruction address of the start of the loop */
  WhereInfo *pWInfo;     /* Information about the WHERE clause */
  Vdbe *v;               /* The virtual database engine */
  Index *pIdx;           /* For looping over indices */
  int nIdx;              /* Number of indices that need updating */
  int nIdxTotal;         /* Total number of indices */
  int iCur;              /* VDBE Cursor number of pTab */
  sqlite3 *db;           /* The database structure */
  Index **apIdx = 0;     /* An array of indices that need updating too */
  char *aIdxUsed = 0;    /* aIdxUsed[i]==1 if the i-th index is used */
  int *aXRef = 0;        /* aXRef[i] is the index in pChanges->a[] of the
                         ** an expression for the i-th column of the table.
                         ** aXRef[i]==-1 if the i-th column is not changed. */
  int chngRowid;         /* True if the record number is being changed */
  Expr *pRowidExpr = 0;  /* Expression defining the new record number */
  int openAll = 0;       /* True if all indices need to be opened */
  AuthContext sContext;  /* The authorization context */







<


|
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  int i, j;              /* Loop counters */
  Table *pTab;           /* The table to be updated */
  int addr = 0;          /* VDBE instruction address of the start of the loop */
  WhereInfo *pWInfo;     /* Information about the WHERE clause */
  Vdbe *v;               /* The virtual database engine */
  Index *pIdx;           /* For looping over indices */
  int nIdx;              /* Number of indices that need updating */

  int iCur;              /* VDBE Cursor number of pTab */
  sqlite3 *db;           /* The database structure */
  int *aRegIdx = 0;      /* One register assigned to each index to be updated */

  int *aXRef = 0;        /* aXRef[i] is the index in pChanges->a[] of the
                         ** an expression for the i-th column of the table.
                         ** aXRef[i]==-1 if the i-th column is not changed. */
  int chngRowid;         /* True if the record number is being changed */
  Expr *pRowidExpr = 0;  /* Expression defining the new record number */
  int openAll = 0;       /* True if all indices need to be opened */
  AuthContext sContext;  /* The authorization context */
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      }else if( rc==SQLITE_IGNORE ){
        aXRef[j] = -1;
      }
    }
#endif
  }

  /* Allocate memory for the array apIdx[] and fill it with pointers to every
  ** index that needs to be updated.  Indices only need updating if their
  ** key includes one of the columns named in pChanges or if the record
  ** number of the original table entry is changing.
  */
  for(nIdx=nIdxTotal=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, nIdxTotal++){
    if( chngRowid ){
      i = 0;
    }else {
      for(i=0; i<pIdx->nColumn; i++){
        if( aXRef[pIdx->aiColumn[i]]>=0 ) break;
      }
    }
    if( i<pIdx->nColumn ) nIdx++;
  }
  if( nIdxTotal>0 ){
    apIdx = sqlite3DbMallocRaw(db, sizeof(Index*) * nIdx + nIdxTotal );
    if( apIdx==0 ) goto update_cleanup;
    aIdxUsed = (char*)&apIdx[nIdx];
  }
  for(nIdx=j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){

    if( chngRowid ){
      i = 0;
    }else{

      for(i=0; i<pIdx->nColumn; i++){
        if( aXRef[pIdx->aiColumn[i]]>=0 ) break;


      }
    }
    if( i<pIdx->nColumn ){
      apIdx[nIdx++] = pIdx;
      aIdxUsed[j] = 1;
    }else{
      aIdxUsed[j] = 0;
    }

  }

  /* Begin generating code.
  */
  v = sqlite3GetVdbe(pParse);
  if( v==0 ) goto update_cleanup;
  if( pParse->nested==0 ) sqlite3VdbeCountChanges(v);







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      }else if( rc==SQLITE_IGNORE ){
        aXRef[j] = -1;
      }
    }
#endif
  }

  /* Allocate memory for the array aRegIdx[].  There is one entry in the
  ** array for each index associated with table being updated.  Fill in
  ** the value with a register number for indices that are to be used
  ** and with zero for unused indices.
  */
  for(nIdx=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, nIdx++){}









  if( nIdx>0 ){
    aRegIdx = sqlite3DbMallocRaw(db, sizeof(Index*) * nIdx );
    if( aRegIdx==0 ) goto update_cleanup;

  }
  for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
    int reg;
    if( chngRowid ){
      reg = ++pParse->nMem;
    }else{
      reg = 0;
      for(i=0; i<pIdx->nColumn; i++){
        if( aXRef[pIdx->aiColumn[i]]>=0 ){
          reg = ++pParse->nMem;
          break;
        }
      }





    }
    aRegIdx[j] = reg;
  }

  /* Begin generating code.
  */
  v = sqlite3GetVdbe(pParse);
  if( v==0 ) goto update_cleanup;
  if( pParse->nested==0 ) sqlite3VdbeCountChanges(v);
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        if( pIdx->onError==OE_Replace ){
          openAll = 1;
          break;
        }
      }
    }
    for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
      if( openAll || aIdxUsed[i] ){
        KeyInfo *pKey = sqlite3IndexKeyinfo(pParse, pIdx);
        sqlite3VdbeAddOp4(v, OP_OpenWrite, iCur+i+1, pIdx->tnum, iDb,
                       (char*)pKey, P4_KEYINFO_HANDOFF);
        assert( pParse->nTab>iCur+i+1 );
      }
    }
  }







|







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        if( pIdx->onError==OE_Replace ){
          openAll = 1;
          break;
        }
      }
    }
    for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
      if( openAll || aRegIdx[i]>0 ){
        KeyInfo *pKey = sqlite3IndexKeyinfo(pParse, pIdx);
        sqlite3VdbeAddOp4(v, OP_OpenWrite, iCur+i+1, pIdx->tnum, iDb,
                       (char*)pKey, P4_KEYINFO_HANDOFF);
        assert( pParse->nTab>iCur+i+1 );
      }
    }
  }
482
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      }else{
        sqlite3ExprCode(pParse, pChanges->a[j].pExpr, 0);
      }
    }

    /* Do constraint checks
    */
    sqlite3GenerateConstraintChecks(pParse, pTab, iCur, aIdxUsed, chngRowid, 1,
                                   onError, addr);

    /* Delete the old indices for the current record.
    */
    sqlite3GenerateRowIndexDelete(v, pTab, iCur, aIdxUsed);

    /* If changing the record number, delete the old record.
    */
    if( chngRowid ){
      sqlite3VdbeAddOp2(v, OP_Delete, iCur, 0);
    }

    /* Create the new index entries and the new record.
    */
    sqlite3CompleteInsertion(pParse, pTab, iCur, aIdxUsed, chngRowid, 1, -1, 0);
  }

  /* Increment the row counter 
  */
  if( db->flags & SQLITE_CountRows && !pParse->trigStack){
    sqlite3VdbeAddOp2(v, OP_AddImm, memCnt, 1);
  }







|




|









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      }else{
        sqlite3ExprCode(pParse, pChanges->a[j].pExpr, 0);
      }
    }

    /* Do constraint checks
    */
    sqlite3GenerateConstraintChecks(pParse, pTab, iCur, aRegIdx, chngRowid, 1,
                                   onError, addr);

    /* Delete the old indices for the current record.
    */
    sqlite3GenerateRowIndexDelete(v, pTab, iCur, aRegIdx);

    /* If changing the record number, delete the old record.
    */
    if( chngRowid ){
      sqlite3VdbeAddOp2(v, OP_Delete, iCur, 0);
    }

    /* Create the new index entries and the new record.
    */
    sqlite3CompleteInsertion(pParse, pTab, iCur, aRegIdx, chngRowid, 1, -1, 0);
  }

  /* Increment the row counter 
  */
  if( db->flags & SQLITE_CountRows && !pParse->trigStack){
    sqlite3VdbeAddOp2(v, OP_AddImm, memCnt, 1);
  }
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  ** all record selected by the WHERE clause have been updated.
  */
  sqlite3VdbeAddOp2(v, OP_Goto, 0, addr);
  sqlite3VdbeJumpHere(v, addr);

  /* Close all tables */
  for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
    if( openAll || aIdxUsed[i] ){
      sqlite3VdbeAddOp2(v, OP_Close, iCur+i+1, 0);
    }
  }
  sqlite3VdbeAddOp2(v, OP_Close, iCur, 0);
  if( triggers_exist ){
    sqlite3VdbeAddOp2(v, OP_Close, newIdx, 0);
    sqlite3VdbeAddOp2(v, OP_Close, oldIdx, 0);







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  ** all record selected by the WHERE clause have been updated.
  */
  sqlite3VdbeAddOp2(v, OP_Goto, 0, addr);
  sqlite3VdbeJumpHere(v, addr);

  /* Close all tables */
  for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
    if( openAll || aRegIdx[i]>0 ){
      sqlite3VdbeAddOp2(v, OP_Close, iCur+i+1, 0);
    }
  }
  sqlite3VdbeAddOp2(v, OP_Close, iCur, 0);
  if( triggers_exist ){
    sqlite3VdbeAddOp2(v, OP_Close, newIdx, 0);
    sqlite3VdbeAddOp2(v, OP_Close, oldIdx, 0);
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    sqlite3VdbeAddOp2(v, OP_ResultRow, memCnt, 1);
    sqlite3VdbeSetNumCols(v, 1);
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "rows updated", P4_STATIC);
  }

update_cleanup:
  sqlite3AuthContextPop(&sContext);
  sqlite3_free(apIdx);
  sqlite3_free(aXRef);
  sqlite3SrcListDelete(pTabList);
  sqlite3ExprListDelete(pChanges);
  sqlite3ExprDelete(pWhere);
  return;
}








|







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    sqlite3VdbeAddOp2(v, OP_ResultRow, memCnt, 1);
    sqlite3VdbeSetNumCols(v, 1);
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "rows updated", P4_STATIC);
  }

update_cleanup:
  sqlite3AuthContextPop(&sContext);
  sqlite3_free(aRegIdx);
  sqlite3_free(aXRef);
  sqlite3SrcListDelete(pTabList);
  sqlite3ExprListDelete(pChanges);
  sqlite3ExprDelete(pWhere);
  return;
}

Changes to src/vdbe.c.
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**
** 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 1.687 2008/01/07 19:20:25 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
** The following global variable is incremented every time a cursor







|







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48
49
50
51
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53
**
** 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 1.688 2008/01/08 02:57:56 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
** The following global variable is incremented every time a cursor
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718




















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            nPop = 0;
          }
          pOut = &pTos[-nPop];
        }else{
          assert( pOp->p2<=p->nMem );
          pOut = &p->aMem[pOp->p2];
        }




















      }
    }

    switch( pOp->opcode ){

/*****************************************************************************
** What follows is a massive switch statement where each case implements a







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            nPop = 0;
          }
          pOut = &pTos[-nPop];
        }else{
          assert( pOp->p2<=p->nMem );
          pOut = &p->aMem[pOp->p2];
        }
      }
    }else if( (opProperty & OPFLG_IN2)!=0 ){
      assert( pOp->p2>=0 );
      if( pOp->p2==0 ){
        pIn2 = pTos;
        nPop = 1;
      }else{
        assert( pOp->p2<=p->nMem );
        pIn2 = &p->aMem[pOp->p2];
        REGISTER_TRACE(pOp->p2, pIn2);
      }
    }else if( (opProperty & OPFLG_IN3)!=0 ){
      assert( pOp->p3>=0 );
      if( pOp->p3==0 ){
        pIn3 = pTos;
        nPop = 1;
      }else{
        assert( pOp->p3<=p->nMem );
        pIn3 = &p->aMem[pOp->p3];
        REGISTER_TRACE(pOp->p3, pIn3);
      }
    }

    switch( pOp->opcode ){

/*****************************************************************************
** What follows is a massive switch statement where each case implements a
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4181
4182
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4187
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4189
4190
4191
4192
4193
4194
4195
4196
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4200
4201
4202
4203
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4205
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4208
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4212
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4214
4215
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4221
4222
4223
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4225
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  }else{
    pC->nullRow = 1;
  }
  pC->rowidIsValid = 0;
  break;
}

/* Opcode: IdxInsert P1 P2 *
**
** The top of the stack holds a SQL index key made using either the
** MakeIdxRec or MakeRecord instructions.  This opcode writes that key
** into the index P1.  Data for the entry is nil.
**
** P2 is a flag that provides a hint to the b-tree layer that this
** insert is likely to be an append.
**
** This instruction only works for indices.  The equivalent instruction
** for tables is OP_Insert.
*/
case OP_IdxInsert: {        /* no-push */
  int i = pOp->p1;
  Cursor *pC;
  BtCursor *pCrsr;
  assert( pTos>=p->aStack );
  assert( i>=0 && i<p->nCursor );
  assert( p->apCsr[i]!=0 );
  assert( pTos->flags & MEM_Blob );
  if( (pCrsr = (pC = p->apCsr[i])->pCursor)!=0 ){
    assert( pC->isTable==0 );
    rc = ExpandBlob(pTos);
    if( rc==SQLITE_OK ){
      int nKey = pTos->n;
      const char *zKey = pTos->z;
      rc = sqlite3BtreeInsert(pCrsr, zKey, nKey, "", 0, 0, pOp->p2);
      assert( pC->deferredMoveto==0 );
      pC->cacheStatus = CACHE_STALE;
    }
  }
  Release(pTos);
  pTos--;
  break;
}

/* Opcode: IdxDelete P1 * *
**
** The top of the stack is an index key built using the either the
** MakeIdxRec or MakeRecord opcodes.
** This opcode removes that entry from the index.
*/
case OP_IdxDelete: {        /* no-push */
  int i = pOp->p1;
  Cursor *pC;
  BtCursor *pCrsr;
  assert( pTos>=p->aStack );
  assert( pTos->flags & MEM_Blob );
  assert( i>=0 && i<p->nCursor );
  assert( p->apCsr[i]!=0 );
  if( (pCrsr = (pC = p->apCsr[i])->pCursor)!=0 ){
    int res;
    rc = sqlite3BtreeMoveto(pCrsr, pTos->z, pTos->n, 0, &res);
    if( rc==SQLITE_OK && res==0 ){
      rc = sqlite3BtreeDelete(pCrsr);
    }
    assert( pC->deferredMoveto==0 );
    pC->cacheStatus = CACHE_STALE;
  }
  Release(pTos);
  pTos--;
  break;
}

/* Opcode: IdxRowid P1 P2 * * *
**
** Write into register P2 an integer which is the last entry in the record at
** the end of the index key pointed to by cursor P1.  This integer should be







|

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|





|



<


|


|

|
|
|




<
<



|

|
<
|

|



<
|




|






<
<







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4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204

4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218


4219
4220
4221
4222
4223
4224

4225
4226
4227
4228
4229
4230

4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242


4243
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4245
4246
4247
4248
4249
  }else{
    pC->nullRow = 1;
  }
  pC->rowidIsValid = 0;
  break;
}

/* Opcode: IdxInsert P1 P2 P3
**
** Register P2 holds a SQL index key made using the
** MakeIdxRec instructions.  This opcode writes that key
** into the index P1.  Data for the entry is nil.
**
** P3 is a flag that provides a hint to the b-tree layer that this
** insert is likely to be an append.
**
** This instruction only works for indices.  The equivalent instruction
** for tables is OP_Insert.
*/
case OP_IdxInsert: {        /* no-push, in2 */
  int i = pOp->p1;
  Cursor *pC;
  BtCursor *pCrsr;

  assert( i>=0 && i<p->nCursor );
  assert( p->apCsr[i]!=0 );
  assert( pIn2->flags & MEM_Blob );
  if( (pCrsr = (pC = p->apCsr[i])->pCursor)!=0 ){
    assert( pC->isTable==0 );
    rc = ExpandBlob(pIn2);
    if( rc==SQLITE_OK ){
      int nKey = pIn2->n;
      const char *zKey = pIn2->z;
      rc = sqlite3BtreeInsert(pCrsr, zKey, nKey, "", 0, 0, pOp->p3);
      assert( pC->deferredMoveto==0 );
      pC->cacheStatus = CACHE_STALE;
    }
  }


  break;
}

/* Opcode: IdxDelete P1 P2 *
**
** The content of register P2 is an index key built using the either the

** MakeIdxRec opcode.  Removes that entry from the index.
*/
case OP_IdxDelete: {        /* no-push, in2 */
  int i = pOp->p1;
  Cursor *pC;
  BtCursor *pCrsr;

  assert( pIn2->flags & MEM_Blob );
  assert( i>=0 && i<p->nCursor );
  assert( p->apCsr[i]!=0 );
  if( (pCrsr = (pC = p->apCsr[i])->pCursor)!=0 ){
    int res;
    rc = sqlite3BtreeMoveto(pCrsr, pIn2->z, pIn2->n, 0, &res);
    if( rc==SQLITE_OK && res==0 ){
      rc = sqlite3BtreeDelete(pCrsr);
    }
    assert( pC->deferredMoveto==0 );
    pC->cacheStatus = CACHE_STALE;
  }


  break;
}

/* Opcode: IdxRowid P1 P2 * * *
**
** Write into register P2 an integer which is the last entry in the record at
** the end of the index key pointed to by cursor P1.  This integer should be
Changes to src/vdbeaux.c.
817
818
819
820
821
822
823

824
825
826
827
828
829

830
831
832
833
834
835
836
      pMem->n = sprintf(pMem->zShort, "%.2x", pOp->p5);   /* P5 */
      pMem->z = pMem->zShort;
      pMem->type = SQLITE_TEXT;
      pMem->enc = SQLITE_UTF8;
      pMem++;
  
      pMem->flags = MEM_Null;                       /* Comment */

      if( pOp->zComment ){
        pMem->flags = MEM_Str|MEM_Term;
        pMem->z = pOp->zComment;
        pMem->n = strlen(pMem->z);
        pMem->enc = SQLITE_UTF8;
      }

    }

    p->nResColumn = 8 - 5*(p->explain-1);
    p->pTos = pMem;
    p->rc = SQLITE_OK;
    rc = SQLITE_ROW;
  }







>






>







817
818
819
820
821
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824
825
826
827
828
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830
831
832
833
834
835
836
837
838
      pMem->n = sprintf(pMem->zShort, "%.2x", pOp->p5);   /* P5 */
      pMem->z = pMem->zShort;
      pMem->type = SQLITE_TEXT;
      pMem->enc = SQLITE_UTF8;
      pMem++;
  
      pMem->flags = MEM_Null;                       /* Comment */
#ifdef SQLITE_DEBUG
      if( pOp->zComment ){
        pMem->flags = MEM_Str|MEM_Term;
        pMem->z = pOp->zComment;
        pMem->n = strlen(pMem->z);
        pMem->enc = SQLITE_UTF8;
      }
#endif
    }

    p->nResColumn = 8 - 5*(p->explain-1);
    p->pTos = pMem;
    p->rc = SQLITE_OK;
    rc = SQLITE_ROW;
  }
Changes to src/vdbemem.c.
525
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530
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534
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536
537
538
539
  }
  memcpy(pTo, pFrom, sizeof(Mem));
  if( pFrom->flags & MEM_Short ){
    pTo->z = pTo->zShort;
  }
  pFrom->flags = MEM_Null;
  pFrom->xDel = 0;
  if( pTo->flags & MEM_Ephem ){
    rc = sqlite3VdbeMemMakeWriteable(pTo);
  }else{
    rc = SQLITE_OK;
  }
  return rc;
}








|







525
526
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531
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533
534
535
536
537
538
539
  }
  memcpy(pTo, pFrom, sizeof(Mem));
  if( pFrom->flags & MEM_Short ){
    pTo->z = pTo->zShort;
  }
  pFrom->flags = MEM_Null;
  pFrom->xDel = 0;
  if( 0 /* pTo->flags & MEM_Ephem */ ){
    rc = sqlite3VdbeMemMakeWriteable(pTo);
  }else{
    rc = SQLITE_OK;
  }
  return rc;
}