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Overview
Comment:Enhancements to the VDBE opcode loop to reduce the number of machine-code instructions evaluated by about 10%.
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SHA1: 9744ffb3f5bc6d8fd59fbb6577a0d549411cd967
User & Date: drh 2009-11-17 23:59:58.000
Context
2009-11-18
01:25
Suppress more instances of unnecessary OP_IsNull and OP_Affinity opcodes. (check-in: bf6c0bd1c5 user: drh tags: trunk)
2009-11-17
23:59
Enhancements to the VDBE opcode loop to reduce the number of machine-code instructions evaluated by about 10%. (check-in: 9744ffb3f5 user: drh tags: trunk)
18:31
Code generator tries to avoid pointless OP_IsNull and OP_Affinity opcodes. (check-in: ebb0c8a3e9 user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/vdbe.c.
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){
  int pc;                    /* The program counter */
  Op *aOp = p->aOp;          /* Copy of p->aOp */
  Op *pOp;                   /* Current operation */
  int rc = SQLITE_OK;        /* Value to return */
  sqlite3 *db = p->db;       /* The database */
  u8 encoding = ENC(db);     /* The database encoding */
  u8 opProperty;
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  u8 checkProgress;          /* True if progress callbacks are enabled */
  int nProgressOps = 0;      /* Opcodes executed since progress callback. */
#endif
  Mem *aMem = p->aMem;       /* Copy of p->aMem */
  Mem *pIn1 = 0;             /* 1st input operand */
  Mem *pIn2 = 0;             /* 2nd input operand */







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){
  int pc;                    /* The program counter */
  Op *aOp = p->aOp;          /* Copy of p->aOp */
  Op *pOp;                   /* Current operation */
  int rc = SQLITE_OK;        /* Value to return */
  sqlite3 *db = p->db;       /* The database */
  u8 encoding = ENC(db);     /* The database encoding */

#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  u8 checkProgress;          /* True if progress callbacks are enabled */
  int nProgressOps = 0;      /* Opcodes executed since progress callback. */
#endif
  Mem *aMem = p->aMem;       /* Copy of p->aMem */
  Mem *pIn1 = 0;             /* 1st input operand */
  Mem *pIn2 = 0;             /* 2nd input operand */
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        }
        nProgressOps = 0;
      }
      nProgressOps++;
    }
#endif

    /* Do common setup processing for any opcode that is marked
    ** with the "out2-prerelease" tag.  Such opcodes have a single

    ** output which is specified by the P2 parameter.  The P2 register
    ** is initialized to a NULL.
    */
    assert( pOp->opflags==sqlite3OpcodeProperty[pOp->opcode] );
    opProperty = pOp->opflags;
    if( opProperty & (OPFLG_OUT2_PRERELEASE | OPFLG_IN1 | OPFLG_IN2
                      | OPFLG_IN3 | OPFLG_OUT2 | OPFLG_OUT3)
    ){
      if( (opProperty & OPFLG_OUT2_PRERELEASE)!=0 ){
        assert( pOp->p2>0 );
        assert( pOp->p2<=p->nMem );
        pOut = &aMem[pOp->p2];
        sqlite3VdbeMemReleaseExternal(pOut);
        pOut->flags = MEM_Null;
        pOut->n = 0;
      }else{
        if( (opProperty & OPFLG_IN1)!=0 ){
          assert( pOp->p1>0 );
          assert( pOp->p1<=p->nMem );
          pIn1 = &aMem[pOp->p1];
          REGISTER_TRACE(pOp->p1, pIn1);
        }
        if( (opProperty & (OPFLG_IN2|OPFLG_OUT2))!=0 ){
          assert( pOp->p2>0 );
          assert( pOp->p2<=p->nMem );
          assert( (opProperty & OPFLG_OUT2)==0 || (opProperty & OPFLG_IN3)==0 );
          pIn2 = pOut = &aMem[pOp->p2];
        }
        if( (opProperty & (OPFLG_IN3|OPFLG_OUT3))!=0 ){
          assert( pOp->p3>0 );
          assert( pOp->p3<=p->nMem );
          pIn3 = pOut = &aMem[pOp->p3];
        }

#ifdef SQLITE_DEBUG








        if( opProperty & OPFLG_IN2 ){ REGISTER_TRACE(pOp->p2, pIn2); }




        if( opProperty & OPFLG_IN3 ){ REGISTER_TRACE(pOp->p3, pIn3); }

#endif


      }



    }

  
    switch( pOp->opcode ){

/*****************************************************************************
** What follows is a massive switch statement where each case implements a
** separate instruction in the virtual machine.  If we follow the usual
** indentation conventions, each case should be indented by 6 spaces.  But







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        }
        nProgressOps = 0;
      }
      nProgressOps++;
    }
#endif


    /* On any opcode with the "out2-prerelase" tag, free any
    ** external allocations out of mem[p2] and set mem[p2] to be
    ** an undefined integer.  Opcodes will either fill in the integer
    ** value or convert mem[p2] to a different type.
    */
    assert( pOp->opflags==sqlite3OpcodeProperty[pOp->opcode] );




    if( pOp->opflags & OPFLG_OUT2_PRERELEASE ){
      assert( pOp->p2>0 );
      assert( pOp->p2<=p->nMem );
      pOut = &aMem[pOp->p2];
      sqlite3VdbeMemReleaseExternal(pOut);
      pOut->flags = MEM_Int;







    }











    /* Sanity checking on other operands */
#ifdef SQLITE_DEBUG
    if( (pOp->opflags & OPFLG_IN1)!=0 ){
      assert( pOp->p1>0 );
      assert( pOp->p1<=p->nMem );
      REGISTER_TRACE(pOp->p1, &aMem[pOp->p1]);
    }
    if( (pOp->opflags & OPFLG_IN2)!=0 ){
      assert( pOp->p2>0 );
      assert( pOp->p2<=p->nMem );
      REGISTER_TRACE(pOp->p2, &aMem[pOp->p2]);
    }
    if( (pOp->opflags & OPFLG_IN3)!=0 ){
      assert( pOp->p3>0 );
      assert( pOp->p3<=p->nMem );
      REGISTER_TRACE(pOp->p3, &aMem[pOp->p3]);
    }
    if( (pOp->opflags & OPFLG_OUT2)!=0 ){
      assert( pOp->p2>0 );
      assert( pOp->p2<=p->nMem );
    }
    if( (pOp->opflags & OPFLG_OUT3)!=0 ){
      assert( pOp->p3>0 );
      assert( pOp->p3<=p->nMem );
    }
#endif
  
    switch( pOp->opcode ){

/*****************************************************************************
** What follows is a massive switch statement where each case implements a
** separate instruction in the virtual machine.  If we follow the usual
** indentation conventions, each case should be indented by 6 spaces.  But
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/* Opcode:  Gosub P1 P2 * * *
**
** Write the current address onto register P1
** and then jump to address P2.
*/
case OP_Gosub: {            /* jump, in1 */

  assert( (pIn1->flags & MEM_Dyn)==0 );
  pIn1->flags = MEM_Int;
  pIn1->u.i = pc;
  REGISTER_TRACE(pOp->p1, pIn1);
  pc = pOp->p2 - 1;
  break;
}

/* Opcode:  Return P1 * * * *
**
** Jump to the next instruction after the address in register P1.
*/
case OP_Return: {           /* in1 */

  assert( pIn1->flags & MEM_Int );
  pc = (int)pIn1->u.i;
  break;
}

/* Opcode:  Yield P1 * * * *
**
** Swap the program counter with the value in register P1.
*/
case OP_Yield: {            /* in1 */
  int pcDest;

  assert( (pIn1->flags & MEM_Dyn)==0 );
  pIn1->flags = MEM_Int;
  pcDest = (int)pIn1->u.i;
  pIn1->u.i = pc;
  REGISTER_TRACE(pOp->p1, pIn1);
  pc = pcDest;
  break;
}

/* Opcode:  HaltIfNull  P1 P2 P3 P4 *
**
** Check the value in register P3.  If is is NULL then Halt using
** parameter P1, P2, and P4 as if this were a Halt instruction.  If the
** value in register P3 is not NULL, then this routine is a no-op.
*/
case OP_HaltIfNull: {      /* in3 */

  if( (pIn3->flags & MEM_Null)==0 ) break;
  /* Fall through into OP_Halt */
}

/* Opcode:  Halt P1 P2 * P4 *
**
** Exit immediately.  All open cursors, etc are closed







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/* Opcode:  Gosub P1 P2 * * *
**
** Write the current address onto register P1
** and then jump to address P2.
*/
case OP_Gosub: {            /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  assert( (pIn1->flags & MEM_Dyn)==0 );
  pIn1->flags = MEM_Int;
  pIn1->u.i = pc;
  REGISTER_TRACE(pOp->p1, pIn1);
  pc = pOp->p2 - 1;
  break;
}

/* Opcode:  Return P1 * * * *
**
** Jump to the next instruction after the address in register P1.
*/
case OP_Return: {           /* in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags & MEM_Int );
  pc = (int)pIn1->u.i;
  break;
}

/* Opcode:  Yield P1 * * * *
**
** Swap the program counter with the value in register P1.
*/
case OP_Yield: {            /* in1 */
  int pcDest;
  pIn1 = &aMem[pOp->p1];
  assert( (pIn1->flags & MEM_Dyn)==0 );
  pIn1->flags = MEM_Int;
  pcDest = (int)pIn1->u.i;
  pIn1->u.i = pc;
  REGISTER_TRACE(pOp->p1, pIn1);
  pc = pcDest;
  break;
}

/* Opcode:  HaltIfNull  P1 P2 P3 P4 *
**
** Check the value in register P3.  If is is NULL then Halt using
** parameter P1, P2, and P4 as if this were a Halt instruction.  If the
** value in register P3 is not NULL, then this routine is a no-op.
*/
case OP_HaltIfNull: {      /* in3 */
  pIn3 = &aMem[pOp->p3];
  if( (pIn3->flags & MEM_Null)==0 ) break;
  /* Fall through into OP_Halt */
}

/* Opcode:  Halt P1 P2 * P4 *
**
** Exit immediately.  All open cursors, etc are closed
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}

/* Opcode: Integer P1 P2 * * *
**
** The 32-bit integer value P1 is written into register P2.
*/
case OP_Integer: {         /* out2-prerelease */
  pOut->flags = MEM_Int;
  pOut->u.i = pOp->p1;
  break;
}

/* Opcode: Int64 * P2 * P4 *
**
** P4 is a pointer to a 64-bit integer value.
** Write that value into register P2.
*/
case OP_Int64: {           /* out2-prerelease */
  assert( pOp->p4.pI64!=0 );
  pOut->flags = MEM_Int;
  pOut->u.i = *pOp->p4.pI64;
  break;
}

/* Opcode: Real * P2 * P4 *
**
** P4 is a pointer to a 64-bit floating point value.







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}

/* Opcode: Integer P1 P2 * * *
**
** The 32-bit integer value P1 is written into register P2.
*/
case OP_Integer: {         /* out2-prerelease */

  pOut->u.i = pOp->p1;
  break;
}

/* Opcode: Int64 * P2 * P4 *
**
** P4 is a pointer to a 64-bit integer value.
** Write that value into register P2.
*/
case OP_Int64: {           /* out2-prerelease */
  assert( pOp->p4.pI64!=0 );

  pOut->u.i = *pOp->p4.pI64;
  break;
}

/* Opcode: Real * P2 * P4 *
**
** P4 is a pointer to a 64-bit floating point value.
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}

/* Opcode: Null * P2 * * *
**
** Write a NULL into register P2.
*/
case OP_Null: {           /* out2-prerelease */

  break;
}


/* Opcode: Blob P1 P2 * P4
**
** P4 points to a blob of data P1 bytes long.  Store this







>







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}

/* Opcode: Null * P2 * * *
**
** Write a NULL into register P2.
*/
case OP_Null: {           /* out2-prerelease */
  pOut->flags = MEM_Null;
  break;
}


/* Opcode: Blob P1 P2 * P4
**
** P4 points to a blob of data P1 bytes long.  Store this
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**
** Make a copy of register P1 into register P2.
**
** This instruction makes a deep copy of the value.  A duplicate
** is made of any string or blob constant.  See also OP_SCopy.
*/
case OP_Copy: {             /* in1, out2 */


  assert( pOut!=pIn1 );
  sqlite3VdbeMemShallowCopy(pOut, pIn1, MEM_Ephem);
  Deephemeralize(pOut);
  REGISTER_TRACE(pOp->p2, pOut);
  break;
}

/* Opcode: SCopy P1 P2 * * *
**
** Make a shallow copy of register P1 into register P2.
**
** This instruction makes a shallow copy of the value.  If the value
** is a string or blob, then the copy is only a pointer to the
** original and hence if the original changes so will the copy.
** Worse, if the original is deallocated, the copy becomes invalid.
** Thus the program must guarantee that the original will not change
** during the lifetime of the copy.  Use OP_Copy to make a complete
** copy.
*/
case OP_SCopy: {            /* in1, out2 */


  assert( pOut!=pIn1 );
  sqlite3VdbeMemShallowCopy(pOut, pIn1, MEM_Ephem);
  REGISTER_TRACE(pOp->p2, pOut);
  break;
}

/* Opcode: ResultRow P1 P2 * * *







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**
** Make a copy of register P1 into register P2.
**
** This instruction makes a deep copy of the value.  A duplicate
** is made of any string or blob constant.  See also OP_SCopy.
*/
case OP_Copy: {             /* in1, out2 */
  pIn1 = &aMem[pOp->p1];
  pOut = &aMem[pOp->p2];
  assert( pOut!=pIn1 );
  sqlite3VdbeMemShallowCopy(pOut, pIn1, MEM_Ephem);
  Deephemeralize(pOut);
  REGISTER_TRACE(pOp->p2, pOut);
  break;
}

/* Opcode: SCopy P1 P2 * * *
**
** Make a shallow copy of register P1 into register P2.
**
** This instruction makes a shallow copy of the value.  If the value
** is a string or blob, then the copy is only a pointer to the
** original and hence if the original changes so will the copy.
** Worse, if the original is deallocated, the copy becomes invalid.
** Thus the program must guarantee that the original will not change
** during the lifetime of the copy.  Use OP_Copy to make a complete
** copy.
*/
case OP_SCopy: {            /* in1, out2 */
  pIn1 = &aMem[pOp->p1];
  pOut = &aMem[pOp->p2];
  assert( pOut!=pIn1 );
  sqlite3VdbeMemShallowCopy(pOut, pIn1, MEM_Ephem);
  REGISTER_TRACE(pOp->p2, pOut);
  break;
}

/* Opcode: ResultRow P1 P2 * * *
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** It is illegal for P1 and P3 to be the same register. Sometimes,
** if P3 is the same register as P2, the implementation is able
** to avoid a memcpy().
*/
case OP_Concat: {           /* same as TK_CONCAT, in1, in2, out3 */
  i64 nByte;




  assert( pIn1!=pOut );
  if( (pIn1->flags | pIn2->flags) & MEM_Null ){
    sqlite3VdbeMemSetNull(pOut);
    break;
  }
  if( ExpandBlob(pIn1) || ExpandBlob(pIn2) ) goto no_mem;
  Stringify(pIn1, encoding);







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** It is illegal for P1 and P3 to be the same register. Sometimes,
** if P3 is the same register as P2, the implementation is able
** to avoid a memcpy().
*/
case OP_Concat: {           /* same as TK_CONCAT, in1, in2, out3 */
  i64 nByte;

  pIn1 = &aMem[pOp->p1];
  pIn2 = &aMem[pOp->p2];
  pOut = &aMem[pOp->p3];
  assert( pIn1!=pOut );
  if( (pIn1->flags | pIn2->flags) & MEM_Null ){
    sqlite3VdbeMemSetNull(pOut);
    break;
  }
  if( ExpandBlob(pIn1) || ExpandBlob(pIn2) ) goto no_mem;
  Stringify(pIn1, encoding);
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case OP_Remainder: {           /* same as TK_REM, in1, in2, out3 */
  int flags;      /* Combined MEM_* flags from both inputs */
  i64 iA;         /* Integer value of left operand */
  i64 iB;         /* Integer value of right operand */
  double rA;      /* Real value of left operand */
  double rB;      /* Real value of right operand */


  applyNumericAffinity(pIn1);

  applyNumericAffinity(pIn2);

  flags = pIn1->flags | pIn2->flags;
  if( (flags & MEM_Null)!=0 ) goto arithmetic_result_is_null;
  if( (pIn1->flags & pIn2->flags & MEM_Int)==MEM_Int ){
    iA = pIn1->u.i;
    iB = pIn2->u.i;
    switch( pOp->opcode ){
      case OP_Add:         iB += iA;       break;







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case OP_Remainder: {           /* same as TK_REM, in1, in2, out3 */
  int flags;      /* Combined MEM_* flags from both inputs */
  i64 iA;         /* Integer value of left operand */
  i64 iB;         /* Integer value of right operand */
  double rA;      /* Real value of left operand */
  double rB;      /* Real value of right operand */

  pIn1 = &aMem[pOp->p1];
  applyNumericAffinity(pIn1);
  pIn2 = &aMem[pOp->p2];
  applyNumericAffinity(pIn2);
  pOut = &aMem[pOp->p3];
  flags = pIn1->flags | pIn2->flags;
  if( (flags & MEM_Null)!=0 ) goto arithmetic_result_is_null;
  if( (pIn1->flags & pIn2->flags & MEM_Int)==MEM_Int ){
    iA = pIn1->u.i;
    iB = pIn2->u.i;
    switch( pOp->opcode ){
      case OP_Add:         iB += iA;       break;
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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;
  i64 b;




  if( (pIn1->flags | pIn2->flags) & MEM_Null ){
    sqlite3VdbeMemSetNull(pOut);
    break;
  }
  a = sqlite3VdbeIntValue(pIn2);
  b = sqlite3VdbeIntValue(pIn1);
  switch( pOp->opcode ){







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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;
  i64 b;

  pIn1 = &aMem[pOp->p1];
  pIn2 = &aMem[pOp->p2];
  pOut = &aMem[pOp->p3];
  if( (pIn1->flags | pIn2->flags) & MEM_Null ){
    sqlite3VdbeMemSetNull(pOut);
    break;
  }
  a = sqlite3VdbeIntValue(pIn2);
  b = sqlite3VdbeIntValue(pIn1);
  switch( pOp->opcode ){
1481
1482
1483
1484
1485
1486
1487

1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500

1501
1502
1503
1504
1505
1506
1507
** 
** Add the constant P2 to 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;
  break;
}

/* Opcode: MustBeInt P1 P2 * * *
** 
** Force the value in register P1 to be an integer.  If the value
** in P1 is not an integer and cannot be converted into an integer
** without data loss, then jump immediately to P2, or if P2==0
** raise an SQLITE_MISMATCH exception.
*/
case OP_MustBeInt: {            /* jump, in1 */

  applyAffinity(pIn1, SQLITE_AFF_NUMERIC, encoding);
  if( (pIn1->flags & MEM_Int)==0 ){
    if( pOp->p2==0 ){
      rc = SQLITE_MISMATCH;
      goto abort_due_to_error;
    }else{
      pc = pOp->p2 - 1;







>













>







1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
** 
** Add the constant P2 to 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 */
  pIn1 = &aMem[pOp->p1];
  sqlite3VdbeMemIntegerify(pIn1);
  pIn1->u.i += pOp->p2;
  break;
}

/* Opcode: MustBeInt P1 P2 * * *
** 
** Force the value in register P1 to be an integer.  If the value
** in P1 is not an integer and cannot be converted into an integer
** without data loss, then jump immediately to P2, or if P2==0
** raise an SQLITE_MISMATCH exception.
*/
case OP_MustBeInt: {            /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  applyAffinity(pIn1, SQLITE_AFF_NUMERIC, encoding);
  if( (pIn1->flags & MEM_Int)==0 ){
    if( pOp->p2==0 ){
      rc = SQLITE_MISMATCH;
      goto abort_due_to_error;
    }else{
      pc = pOp->p2 - 1;
1518
1519
1520
1521
1522
1523
1524

1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541

1542
1543
1544
1545
1546
1547
1548
**
** This opcode is used when extracting information from a column that
** has REAL affinity.  Such column values may still be stored as
** integers, for space efficiency, but after extraction we want them
** to have only a real value.
*/
case OP_RealAffinity: {                  /* in1 */

  if( pIn1->flags & MEM_Int ){
    sqlite3VdbeMemRealify(pIn1);
  }
  break;
}

#ifndef SQLITE_OMIT_CAST
/* Opcode: ToText P1 * * * *
**
** Force the value in register P1 to be text.
** If the value is numeric, convert it to a string using the
** equivalent of printf().  Blob values are unchanged and
** are afterwards simply interpreted as text.
**
** A NULL value is not changed by this routine.  It remains NULL.
*/
case OP_ToText: {                  /* same as TK_TO_TEXT, in1 */

  if( pIn1->flags & MEM_Null ) break;
  assert( MEM_Str==(MEM_Blob>>3) );
  pIn1->flags |= (pIn1->flags&MEM_Blob)>>3;
  applyAffinity(pIn1, SQLITE_AFF_TEXT, encoding);
  rc = ExpandBlob(pIn1);
  assert( pIn1->flags & MEM_Str || db->mallocFailed );
  pIn1->flags &= ~(MEM_Int|MEM_Real|MEM_Blob|MEM_Zero);







>

















>







1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
**
** This opcode is used when extracting information from a column that
** has REAL affinity.  Such column values may still be stored as
** integers, for space efficiency, but after extraction we want them
** to have only a real value.
*/
case OP_RealAffinity: {                  /* in1 */
  pIn1 = &aMem[pOp->p1];
  if( pIn1->flags & MEM_Int ){
    sqlite3VdbeMemRealify(pIn1);
  }
  break;
}

#ifndef SQLITE_OMIT_CAST
/* Opcode: ToText P1 * * * *
**
** Force the value in register P1 to be text.
** If the value is numeric, convert it to a string using the
** equivalent of printf().  Blob values are unchanged and
** are afterwards simply interpreted as text.
**
** A NULL value is not changed by this routine.  It remains NULL.
*/
case OP_ToText: {                  /* same as TK_TO_TEXT, in1 */
  pIn1 = &aMem[pOp->p1];
  if( pIn1->flags & MEM_Null ) break;
  assert( MEM_Str==(MEM_Blob>>3) );
  pIn1->flags |= (pIn1->flags&MEM_Blob)>>3;
  applyAffinity(pIn1, SQLITE_AFF_TEXT, encoding);
  rc = ExpandBlob(pIn1);
  assert( pIn1->flags & MEM_Str || db->mallocFailed );
  pIn1->flags &= ~(MEM_Int|MEM_Real|MEM_Blob|MEM_Zero);
1556
1557
1558
1559
1560
1561
1562

1563
1564
1565
1566
1567
1568
1569
** If the value is numeric, convert it to a string first.
** Strings are simply reinterpreted as blobs with no change
** to the underlying data.
**
** A NULL value is not changed by this routine.  It remains NULL.
*/
case OP_ToBlob: {                  /* same as TK_TO_BLOB, in1 */

  if( pIn1->flags & MEM_Null ) break;
  if( (pIn1->flags & MEM_Blob)==0 ){
    applyAffinity(pIn1, SQLITE_AFF_TEXT, encoding);
    assert( pIn1->flags & MEM_Str || db->mallocFailed );
    MemSetTypeFlag(pIn1, MEM_Blob);
  }else{
    pIn1->flags &= ~(MEM_TypeMask&~MEM_Blob);







>







1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
** If the value is numeric, convert it to a string first.
** Strings are simply reinterpreted as blobs with no change
** to the underlying data.
**
** A NULL value is not changed by this routine.  It remains NULL.
*/
case OP_ToBlob: {                  /* same as TK_TO_BLOB, in1 */
  pIn1 = &aMem[pOp->p1];
  if( pIn1->flags & MEM_Null ) break;
  if( (pIn1->flags & MEM_Blob)==0 ){
    applyAffinity(pIn1, SQLITE_AFF_TEXT, encoding);
    assert( pIn1->flags & MEM_Str || db->mallocFailed );
    MemSetTypeFlag(pIn1, MEM_Blob);
  }else{
    pIn1->flags &= ~(MEM_TypeMask&~MEM_Blob);
1579
1580
1581
1582
1583
1584
1585

1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602

1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619

1620
1621
1622
1623
1624
1625
1626
** If the value is text or blob, try to convert it to an using the
** equivalent of atoi() or atof() and store 0 if no such conversion 
** is possible.
**
** A NULL value is not changed by this routine.  It remains NULL.
*/
case OP_ToNumeric: {                  /* same as TK_TO_NUMERIC, in1 */

  if( (pIn1->flags & (MEM_Null|MEM_Int|MEM_Real))==0 ){
    sqlite3VdbeMemNumerify(pIn1);
  }
  break;
}
#endif /* SQLITE_OMIT_CAST */

/* Opcode: ToInt P1 * * * *
**
** Force the value in register P1 be an integer.  If
** The value is currently a real number, drop its fractional part.
** 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_ToInt: {                  /* same as TK_TO_INT, in1 */

  if( (pIn1->flags & MEM_Null)==0 ){
    sqlite3VdbeMemIntegerify(pIn1);
  }
  break;
}

#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);
  }
  break;
}
#endif /* SQLITE_OMIT_CAST */








>

















>

















>







1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
** If the value is text or blob, try to convert it to an using the
** equivalent of atoi() or atof() and store 0 if no such conversion 
** is possible.
**
** A NULL value is not changed by this routine.  It remains NULL.
*/
case OP_ToNumeric: {                  /* same as TK_TO_NUMERIC, in1 */
  pIn1 = &aMem[pOp->p1];
  if( (pIn1->flags & (MEM_Null|MEM_Int|MEM_Real))==0 ){
    sqlite3VdbeMemNumerify(pIn1);
  }
  break;
}
#endif /* SQLITE_OMIT_CAST */

/* Opcode: ToInt P1 * * * *
**
** Force the value in register P1 be an integer.  If
** The value is currently a real number, drop its fractional part.
** 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_ToInt: {                  /* same as TK_TO_INT, in1 */
  pIn1 = &aMem[pOp->p1];
  if( (pIn1->flags & MEM_Null)==0 ){
    sqlite3VdbeMemIntegerify(pIn1);
  }
  break;
}

#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 */
  pIn1 = &aMem[pOp->p1];
  if( (pIn1->flags & MEM_Null)==0 ){
    sqlite3VdbeMemRealify(pIn1);
  }
  break;
}
#endif /* SQLITE_OMIT_CAST */

1701
1702
1703
1704
1705
1706
1707


1708
1709
1710
1711
1712
1713
1714
case OP_Lt:               /* same as TK_LT, jump, in1, in3 */
case OP_Le:               /* same as TK_LE, jump, in1, in3 */
case OP_Gt:               /* same as TK_GT, jump, in1, in3 */
case OP_Ge: {             /* same as TK_GE, jump, in1, in3 */
  int res;            /* Result of the comparison of pIn1 against pIn3 */
  char affinity;      /* Affinity to use for comparison */



  if( (pIn1->flags | pIn3->flags)&MEM_Null ){
    /* One or both operands are NULL */
    if( pOp->p5 & SQLITE_NULLEQ ){
      /* If SQLITE_NULLEQ is set (which will only happen if the operator is
      ** OP_Eq or OP_Ne) then take the jump or not depending on whether
      ** or not both operands are null.
      */







>
>







1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
case OP_Lt:               /* same as TK_LT, jump, in1, in3 */
case OP_Le:               /* same as TK_LE, jump, in1, in3 */
case OP_Gt:               /* same as TK_GT, jump, in1, in3 */
case OP_Ge: {             /* same as TK_GE, jump, in1, in3 */
  int res;            /* Result of the comparison of pIn1 against pIn3 */
  char affinity;      /* Affinity to use for comparison */

  pIn1 = &aMem[pOp->p1];
  pIn3 = &aMem[pOp->p3];
  if( (pIn1->flags | pIn3->flags)&MEM_Null ){
    /* One or both operands are NULL */
    if( pOp->p5 & SQLITE_NULLEQ ){
      /* If SQLITE_NULLEQ is set (which will only happen if the operator is
      ** OP_Eq or OP_Ne) then take the jump or not depending on whether
      ** or not both operands are null.
      */
1872
1873
1874
1875
1876
1877
1878

1879
1880
1881
1882
1883

1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895

1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911


1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926


1927
1928
1929
1930
1931
1932
1933
** give a NULL output.
*/
case OP_And:              /* same as TK_AND, in1, in2, out3 */
case OP_Or: {             /* same as TK_OR, in1, in2, out3 */
  int v1;    /* Left operand:  0==FALSE, 1==TRUE, 2==UNKNOWN or NULL */
  int v2;    /* Right operand: 0==FALSE, 1==TRUE, 2==UNKNOWN or NULL */


  if( pIn1->flags & MEM_Null ){
    v1 = 2;
  }else{
    v1 = sqlite3VdbeIntValue(pIn1)!=0;
  }

  if( pIn2->flags & MEM_Null ){
    v2 = 2;
  }else{
    v2 = sqlite3VdbeIntValue(pIn2)!=0;
  }
  if( pOp->opcode==OP_And ){
    static const unsigned char and_logic[] = { 0, 0, 0, 0, 1, 2, 0, 2, 2 };
    v1 = and_logic[v1*3+v2];
  }else{
    static const unsigned char or_logic[] = { 0, 1, 2, 1, 1, 1, 2, 1, 2 };
    v1 = or_logic[v1*3+v2];
  }

  if( v1==2 ){
    MemSetTypeFlag(pOut, MEM_Null);
  }else{
    pOut->u.i = v1;
    MemSetTypeFlag(pOut, MEM_Int);
  }
  break;
}

/* Opcode: Not P1 P2 * * *
**
** Interpret the value in register P1 as a boolean value.  Store the
** boolean complement in register P2.  If the value in register P1 is 
** NULL, then a NULL is stored in P2.
*/
case OP_Not: {                /* same as TK_NOT, in1, out2 */


  if( pIn1->flags & MEM_Null ){
    sqlite3VdbeMemSetNull(pOut);
  }else{
    sqlite3VdbeMemSetInt64(pOut, !sqlite3VdbeIntValue(pIn1));
  }
  break;
}

/* Opcode: BitNot P1 P2 * * *
**
** Interpret the content of register P1 as an integer.  Store the
** ones-complement of the P1 value into register P2.  If P1 holds
** a NULL then store a NULL in P2.
*/
case OP_BitNot: {             /* same as TK_BITNOT, in1, out2 */


  if( pIn1->flags & MEM_Null ){
    sqlite3VdbeMemSetNull(pOut);
  }else{
    sqlite3VdbeMemSetInt64(pOut, ~sqlite3VdbeIntValue(pIn1));
  }
  break;
}







>





>












>
















>
>















>
>







1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
** give a NULL output.
*/
case OP_And:              /* same as TK_AND, in1, in2, out3 */
case OP_Or: {             /* same as TK_OR, in1, in2, out3 */
  int v1;    /* Left operand:  0==FALSE, 1==TRUE, 2==UNKNOWN or NULL */
  int v2;    /* Right operand: 0==FALSE, 1==TRUE, 2==UNKNOWN or NULL */

  pIn1 = &aMem[pOp->p1];
  if( pIn1->flags & MEM_Null ){
    v1 = 2;
  }else{
    v1 = sqlite3VdbeIntValue(pIn1)!=0;
  }
  pIn2 = &aMem[pOp->p2];
  if( pIn2->flags & MEM_Null ){
    v2 = 2;
  }else{
    v2 = sqlite3VdbeIntValue(pIn2)!=0;
  }
  if( pOp->opcode==OP_And ){
    static const unsigned char and_logic[] = { 0, 0, 0, 0, 1, 2, 0, 2, 2 };
    v1 = and_logic[v1*3+v2];
  }else{
    static const unsigned char or_logic[] = { 0, 1, 2, 1, 1, 1, 2, 1, 2 };
    v1 = or_logic[v1*3+v2];
  }
  pOut = &aMem[pOp->p3];
  if( v1==2 ){
    MemSetTypeFlag(pOut, MEM_Null);
  }else{
    pOut->u.i = v1;
    MemSetTypeFlag(pOut, MEM_Int);
  }
  break;
}

/* Opcode: Not P1 P2 * * *
**
** Interpret the value in register P1 as a boolean value.  Store the
** boolean complement in register P2.  If the value in register P1 is 
** NULL, then a NULL is stored in P2.
*/
case OP_Not: {                /* same as TK_NOT, in1, out2 */
  pIn1 = &aMem[pOp->p1];
  pOut = &aMem[pOp->p2];
  if( pIn1->flags & MEM_Null ){
    sqlite3VdbeMemSetNull(pOut);
  }else{
    sqlite3VdbeMemSetInt64(pOut, !sqlite3VdbeIntValue(pIn1));
  }
  break;
}

/* Opcode: BitNot P1 P2 * * *
**
** Interpret the content of register P1 as an integer.  Store the
** ones-complement of the P1 value into register P2.  If P1 holds
** a NULL then store a NULL in P2.
*/
case OP_BitNot: {             /* same as TK_BITNOT, in1, out2 */
  pIn1 = &aMem[pOp->p1];
  pOut = &aMem[pOp->p2];
  if( pIn1->flags & MEM_Null ){
    sqlite3VdbeMemSetNull(pOut);
  }else{
    sqlite3VdbeMemSetInt64(pOut, ~sqlite3VdbeIntValue(pIn1));
  }
  break;
}
1943
1944
1945
1946
1947
1948
1949

1950
1951
1952
1953
1954
1955
1956
** Jump to P2 if the value in register P1 is False.  The value is
** is considered true if it has a numeric value of zero.  If the value
** in P1 is NULL then take the jump if P3 is true.
*/
case OP_If:                 /* jump, in1 */
case OP_IfNot: {            /* jump, in1 */
  int c;

  if( pIn1->flags & MEM_Null ){
    c = pOp->p3;
  }else{
#ifdef SQLITE_OMIT_FLOATING_POINT
    c = sqlite3VdbeIntValue(pIn1)!=0;
#else
    c = sqlite3VdbeRealValue(pIn1)!=0.0;







>







1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
** Jump to P2 if the value in register P1 is False.  The value is
** is considered true if it has a numeric value of zero.  If the value
** in P1 is NULL then take the jump if P3 is true.
*/
case OP_If:                 /* jump, in1 */
case OP_IfNot: {            /* jump, in1 */
  int c;
  pIn1 = &aMem[pOp->p1];
  if( pIn1->flags & MEM_Null ){
    c = pOp->p3;
  }else{
#ifdef SQLITE_OMIT_FLOATING_POINT
    c = sqlite3VdbeIntValue(pIn1)!=0;
#else
    c = sqlite3VdbeRealValue(pIn1)!=0.0;
1964
1965
1966
1967
1968
1969
1970

1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981

1982
1983
1984
1985
1986
1987
1988
}

/* Opcode: IsNull P1 P2 * * *
**
** Jump to P2 if the value in register P1 is NULL.
*/
case OP_IsNull: {            /* same as TK_ISNULL, jump, in1 */

  if( (pIn1->flags & MEM_Null)!=0 ){
    pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: NotNull P1 P2 * * *
**
** Jump to P2 if the value in register P1 is not NULL.  
*/
case OP_NotNull: {            /* same as TK_NOTNULL, jump, in1 */

  if( (pIn1->flags & MEM_Null)==0 ){
    pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: Column P1 P2 P3 P4 P5







>











>







1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
}

/* Opcode: IsNull P1 P2 * * *
**
** Jump to P2 if the value in register P1 is NULL.
*/
case OP_IsNull: {            /* same as TK_ISNULL, jump, in1 */
  pIn1 = &aMem[pOp->p1];
  if( (pIn1->flags & MEM_Null)!=0 ){
    pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: NotNull P1 P2 * * *
**
** Jump to P2 if the value in register P1 is not NULL.  
*/
case OP_NotNull: {            /* same as TK_NOTNULL, jump, in1 */
  pIn1 = &aMem[pOp->p1];
  if( (pIn1->flags & MEM_Null)==0 ){
    pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: Column P1 P2 P3 P4 P5
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466

  pCrsr = p->apCsr[pOp->p1]->pCursor;
  if( pCrsr ){
    rc = sqlite3BtreeCount(pCrsr, &nEntry);
  }else{
    nEntry = 0;
  }
  pOut->flags = MEM_Int;
  pOut->u.i = nEntry;
  break;
}
#endif

/* Opcode: Savepoint P1 * * P4 *
**







<







2486
2487
2488
2489
2490
2491
2492

2493
2494
2495
2496
2497
2498
2499

  pCrsr = p->apCsr[pOp->p1]->pCursor;
  if( pCrsr ){
    rc = sqlite3BtreeCount(pCrsr, &nEntry);
  }else{
    nEntry = 0;
  }

  pOut->u.i = nEntry;
  break;
}
#endif

/* Opcode: Savepoint P1 * * P4 *
**
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800

2801
2802
2803
2804
2805
2806
2807
  assert( pOp->p3<SQLITE_N_BTREE_META );
  assert( iDb>=0 && iDb<db->nDb );
  assert( db->aDb[iDb].pBt!=0 );
  assert( (p->btreeMask & (1<<iDb))!=0 );

  sqlite3BtreeGetMeta(db->aDb[iDb].pBt, iCookie, (u32 *)&iMeta);
  pOut->u.i = iMeta;
  MemSetTypeFlag(pOut, MEM_Int);
  break;
}

/* Opcode: SetCookie P1 P2 P3 * *
**
** Write the content of register P3 (interpreted as an integer)
** into cookie number P2 of database P1.  P2==1 is the schema version.  
** P2==2 is the database format. P2==3 is the recommended pager cache 
** size, and so forth.  P1==0 is the main database file and P1==1 is the 
** database file used to store temporary tables.
**
** A transaction must be started before executing this opcode.
*/
case OP_SetCookie: {       /* in3 */
  Db *pDb;
  assert( pOp->p2<SQLITE_N_BTREE_META );
  assert( pOp->p1>=0 && pOp->p1<db->nDb );
  assert( (p->btreeMask & (1<<pOp->p1))!=0 );
  pDb = &db->aDb[pOp->p1];
  assert( pDb->pBt!=0 );

  sqlite3VdbeMemIntegerify(pIn3);
  /* See note about index shifting on OP_ReadCookie */
  rc = sqlite3BtreeUpdateMeta(pDb->pBt, pOp->p2, (int)pIn3->u.i);
  if( pOp->p2==BTREE_SCHEMA_VERSION ){
    /* When the schema cookie changes, record the new cookie internally */
    pDb->pSchema->schema_cookie = (int)pIn3->u.i;
    db->flags |= SQLITE_InternChanges;







<




















>







2806
2807
2808
2809
2810
2811
2812

2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
  assert( pOp->p3<SQLITE_N_BTREE_META );
  assert( iDb>=0 && iDb<db->nDb );
  assert( db->aDb[iDb].pBt!=0 );
  assert( (p->btreeMask & (1<<iDb))!=0 );

  sqlite3BtreeGetMeta(db->aDb[iDb].pBt, iCookie, (u32 *)&iMeta);
  pOut->u.i = iMeta;

  break;
}

/* Opcode: SetCookie P1 P2 P3 * *
**
** Write the content of register P3 (interpreted as an integer)
** into cookie number P2 of database P1.  P2==1 is the schema version.  
** P2==2 is the database format. P2==3 is the recommended pager cache 
** size, and so forth.  P1==0 is the main database file and P1==1 is the 
** database file used to store temporary tables.
**
** A transaction must be started before executing this opcode.
*/
case OP_SetCookie: {       /* in3 */
  Db *pDb;
  assert( pOp->p2<SQLITE_N_BTREE_META );
  assert( pOp->p1>=0 && pOp->p1<db->nDb );
  assert( (p->btreeMask & (1<<pOp->p1))!=0 );
  pDb = &db->aDb[pOp->p1];
  assert( pDb->pBt!=0 );
  pIn3 = &aMem[pOp->p3];
  sqlite3VdbeMemIntegerify(pIn3);
  /* See note about index shifting on OP_ReadCookie */
  rc = sqlite3BtreeUpdateMeta(pDb->pBt, pOp->p2, (int)pIn3->u.i);
  if( pOp->p2==BTREE_SCHEMA_VERSION ){
    /* When the schema cookie changes, record the new cookie internally */
    pDb->pSchema->schema_cookie = (int)pIn3->u.i;
    db->flags |= SQLITE_InternChanges;
3178
3179
3180
3181
3182
3183
3184

3185
3186
3187
3188
3189
3190
3191
  if( pC->pCursor!=0 ){
    oc = pOp->opcode;
    pC->nullRow = 0;
    if( pC->isTable ){
      /* The input value in P3 might be of any type: integer, real, string,
      ** blob, or NULL.  But it needs to be an integer before we can do
      ** the seek, so covert it. */

      applyNumericAffinity(pIn3);
      iKey = sqlite3VdbeIntValue(pIn3);
      pC->rowidIsValid = 0;

      /* If the P3 value could not be converted into an integer without
      ** loss of information, then special processing is required... */
      if( (pIn3->flags & MEM_Int)==0 ){







>







3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
  if( pC->pCursor!=0 ){
    oc = pOp->opcode;
    pC->nullRow = 0;
    if( pC->isTable ){
      /* The input value in P3 might be of any type: integer, real, string,
      ** blob, or NULL.  But it needs to be an integer before we can do
      ** the seek, so covert it. */
      pIn3 = &aMem[pOp->p3];
      applyNumericAffinity(pIn3);
      iKey = sqlite3VdbeIntValue(pIn3);
      pC->rowidIsValid = 0;

      /* If the P3 value could not be converted into an integer without
      ** loss of information, then special processing is required... */
      if( (pIn3->flags & MEM_Int)==0 ){
3317
3318
3319
3320
3321
3322
3323

3324
3325
3326
3327
3328
3329
3330

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  if( ALWAYS(pC->pCursor!=0) ){
    assert( pC->isTable );
    pC->nullRow = 0;

    pC->movetoTarget = sqlite3VdbeIntValue(pIn2);
    pC->rowidIsValid = 0;
    pC->deferredMoveto = 1;
  }
  break;
}
  







>







3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  if( ALWAYS(pC->pCursor!=0) ){
    assert( pC->isTable );
    pC->nullRow = 0;
    pIn2 = &aMem[pOp->p2];
    pC->movetoTarget = sqlite3VdbeIntValue(pIn2);
    pC->rowidIsValid = 0;
    pC->deferredMoveto = 1;
  }
  break;
}
  
3367
3368
3369
3370
3371
3372
3373

3374
3375
3376
3377
3378
3379
3380
#endif

  alreadyExists = 0;
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  assert( pOp->p4type==P4_INT32 );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );

  if( ALWAYS(pC->pCursor!=0) ){

    assert( pC->isTable==0 );
    if( pOp->p4.i>0 ){
      r.pKeyInfo = pC->pKeyInfo;
      r.nField = pOp->p4.i;
      r.aMem = pIn3;







>







3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
#endif

  alreadyExists = 0;
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  assert( pOp->p4type==P4_INT32 );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  pIn3 = &aMem[pOp->p3];
  if( ALWAYS(pC->pCursor!=0) ){

    assert( pC->isTable==0 );
    if( pOp->p4.i>0 ){
      r.pKeyInfo = pC->pKeyInfo;
      r.nField = pOp->p4.i;
      r.aMem = pIn3;
3440
3441
3442
3443
3444
3445
3446

3447
3448
3449
3450
3451
3452
3453
  VdbeCursor *pCx;
  BtCursor *pCrsr;
  u16 nField;
  Mem *aMx;
  UnpackedRecord r;                  /* B-Tree index search key */
  i64 R;                             /* Rowid stored in register P3 */


  aMx = &aMem[pOp->p4.i];
  /* Assert that the values of parameters P1 and P4 are in range. */
  assert( pOp->p4type==P4_INT32 );
  assert( pOp->p4.i>0 && pOp->p4.i<=p->nMem );
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );

  /* Find the index cursor. */







>







3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
  VdbeCursor *pCx;
  BtCursor *pCrsr;
  u16 nField;
  Mem *aMx;
  UnpackedRecord r;                  /* B-Tree index search key */
  i64 R;                             /* Rowid stored in register P3 */

  pIn3 = &aMem[pOp->p3];
  aMx = &aMem[pOp->p4.i];
  /* Assert that the values of parameters P1 and P4 are in range. */
  assert( pOp->p4type==P4_INT32 );
  assert( pOp->p4.i>0 && pOp->p4.i<=p->nMem );
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );

  /* Find the index cursor. */
3508
3509
3510
3511
3512
3513
3514

3515
3516
3517
3518
3519
3520
3521
*/
case OP_NotExists: {        /* jump, in3 */
  VdbeCursor *pC;
  BtCursor *pCrsr;
  int res;
  u64 iKey;


  assert( pIn3->flags & MEM_Int );
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  assert( pC->isTable );
  assert( pC->pseudoTableReg==0 );
  pCrsr = pC->pCursor;







>







3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
*/
case OP_NotExists: {        /* jump, in3 */
  VdbeCursor *pC;
  BtCursor *pCrsr;
  int res;
  u64 iKey;

  pIn3 = &aMem[pOp->p3];
  assert( pIn3->flags & MEM_Int );
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  assert( pC->isTable );
  assert( pC->pseudoTableReg==0 );
  pCrsr = pC->pCursor;
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
** The sequence number on the cursor is incremented after this
** instruction.  
*/
case OP_Sequence: {           /* out2-prerelease */
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  assert( p->apCsr[pOp->p1]!=0 );
  pOut->u.i = p->apCsr[pOp->p1]->seqCount++;
  MemSetTypeFlag(pOut, MEM_Int);
  break;
}


/* Opcode: NewRowid P1 P2 P3 * *
**
** Get a new integer record number (a.k.a "rowid") used as the key to a table.







<







3589
3590
3591
3592
3593
3594
3595

3596
3597
3598
3599
3600
3601
3602
** The sequence number on the cursor is incremented after this
** instruction.  
*/
case OP_Sequence: {           /* out2-prerelease */
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  assert( p->apCsr[pOp->p1]!=0 );
  pOut->u.i = p->apCsr[pOp->p1]->seqCount++;

  break;
}


/* Opcode: NewRowid P1 P2 P3 * *
**
** Get a new integer record number (a.k.a "rowid") used as the key to a table.
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
        goto abort_due_to_error;
      }
    }
    pC->rowidIsValid = 0;
    pC->deferredMoveto = 0;
    pC->cacheStatus = CACHE_STALE;
  }
  MemSetTypeFlag(pOut, MEM_Int);
  pOut->u.i = v;
  break;
}

/* Opcode: Insert P1 P2 P3 P4 P5
**
** Write an entry into the table of cursor P1.  A new entry is







<







3725
3726
3727
3728
3729
3730
3731

3732
3733
3734
3735
3736
3737
3738
        goto abort_due_to_error;
      }
    }
    pC->rowidIsValid = 0;
    pC->deferredMoveto = 0;
    pC->cacheStatus = CACHE_STALE;
  }

  pOut->u.i = v;
  break;
}

/* Opcode: Insert P1 P2 P3 P4 P5
**
** Write an entry into the table of cursor P1.  A new entry is
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
  const sqlite3_module *pModule;

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  assert( pC->pseudoTableReg==0 );
  if( pC->nullRow ){
    /* Do nothing so that reg[P2] remains NULL */
    break;
  }else if( pC->deferredMoveto ){
    v = pC->movetoTarget;
#ifndef SQLITE_OMIT_VIRTUALTABLE
  }else if( pC->pVtabCursor ){
    pVtab = pC->pVtabCursor->pVtab;
    pModule = pVtab->pModule;







|







4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
  const sqlite3_module *pModule;

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  assert( pC->pseudoTableReg==0 );
  if( pC->nullRow ){
    pOut->flags = MEM_Null;
    break;
  }else if( pC->deferredMoveto ){
    v = pC->movetoTarget;
#ifndef SQLITE_OMIT_VIRTUALTABLE
  }else if( pC->pVtabCursor ){
    pVtab = pC->pVtabCursor->pVtab;
    pModule = pVtab->pModule;
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
      v = pC->lastRowid;
    }else{
      rc = sqlite3BtreeKeySize(pC->pCursor, &v);
      assert( rc==SQLITE_OK );  /* Always so because of CursorMoveto() above */
    }
  }
  pOut->u.i = v;
  MemSetTypeFlag(pOut, MEM_Int);
  break;
}

/* Opcode: NullRow P1 * * * *
**
** Move the cursor P1 to a null row.  Any OP_Column operations
** that occur while the cursor is on the null row will always







<







4044
4045
4046
4047
4048
4049
4050

4051
4052
4053
4054
4055
4056
4057
      v = pC->lastRowid;
    }else{
      rc = sqlite3BtreeKeySize(pC->pCursor, &v);
      assert( rc==SQLITE_OK );  /* Always so because of CursorMoveto() above */
    }
  }
  pOut->u.i = v;

  break;
}

/* Opcode: NullRow P1 * * * *
**
** Move the cursor P1 to a null row.  Any OP_Column operations
** that occur while the cursor is on the null row will always
4193
4194
4195
4196
4197
4198
4199

4200
4201
4202
4203
4204
4205
4206
  BtCursor *pCrsr;
  int nKey;
  const char *zKey;

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );

  assert( pIn2->flags & MEM_Blob );
  pCrsr = pC->pCursor;
  if( ALWAYS(pCrsr!=0) ){
    assert( pC->isTable==0 );
    rc = ExpandBlob(pIn2);
    if( rc==SQLITE_OK ){
      nKey = pIn2->n;







>







4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
  BtCursor *pCrsr;
  int nKey;
  const char *zKey;

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  pIn2 = &aMem[pOp->p2];
  assert( pIn2->flags & MEM_Blob );
  pCrsr = pC->pCursor;
  if( ALWAYS(pCrsr!=0) ){
    assert( pC->isTable==0 );
    rc = ExpandBlob(pIn2);
    if( rc==SQLITE_OK ){
      nKey = pIn2->n;
4261
4262
4263
4264
4265
4266
4267

4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279

4280
4281
4282
4283
4284
4285
4286
  VdbeCursor *pC;
  i64 rowid;

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  pCrsr = pC->pCursor;

  if( ALWAYS(pCrsr!=0) ){
    rc = sqlite3VdbeCursorMoveto(pC);
    if( NEVER(rc) ) goto abort_due_to_error;
    assert( pC->deferredMoveto==0 );
    assert( pC->isTable==0 );
    if( !pC->nullRow ){
      rc = sqlite3VdbeIdxRowid(db, pCrsr, &rowid);
      if( rc!=SQLITE_OK ){
        goto abort_due_to_error;
      }
      MemSetTypeFlag(pOut, MEM_Int);
      pOut->u.i = rowid;

    }
  }
  break;
}

/* Opcode: IdxGE P1 P2 P3 P4 P5
**







>










<

>







4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314

4315
4316
4317
4318
4319
4320
4321
4322
4323
  VdbeCursor *pC;
  i64 rowid;

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  pCrsr = pC->pCursor;
  pOut->flags = MEM_Null;
  if( ALWAYS(pCrsr!=0) ){
    rc = sqlite3VdbeCursorMoveto(pC);
    if( NEVER(rc) ) goto abort_due_to_error;
    assert( pC->deferredMoveto==0 );
    assert( pC->isTable==0 );
    if( !pC->nullRow ){
      rc = sqlite3VdbeIdxRowid(db, pCrsr, &rowid);
      if( rc!=SQLITE_OK ){
        goto abort_due_to_error;
      }

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

/* Opcode: IdxGE P1 P2 P3 P4 P5
**
4374
4375
4376
4377
4378
4379
4380

4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
    if( pVdbe->magic==VDBE_MAGIC_RUN && pVdbe->inVtabMethod<2 && pVdbe->pc>=0 ){
      iCnt++;
    }
  }
#else
  iCnt = db->activeVdbeCnt;
#endif

  if( iCnt>1 ){
    rc = SQLITE_LOCKED;
    p->errorAction = OE_Abort;
  }else{
    iDb = pOp->p3;
    assert( iCnt==1 );
    assert( (p->btreeMask & (1<<iDb))!=0 );
    rc = sqlite3BtreeDropTable(db->aDb[iDb].pBt, pOp->p1, &iMoved);
    MemSetTypeFlag(pOut, MEM_Int);
    pOut->u.i = iMoved;
#ifndef SQLITE_OMIT_AUTOVACUUM
    if( rc==SQLITE_OK && iMoved!=0 ){
      sqlite3RootPageMoved(&db->aDb[iDb], iMoved, pOp->p1);
    }
#endif
  }







>








|







4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
    if( pVdbe->magic==VDBE_MAGIC_RUN && pVdbe->inVtabMethod<2 && pVdbe->pc>=0 ){
      iCnt++;
    }
  }
#else
  iCnt = db->activeVdbeCnt;
#endif
  pOut->flags = MEM_Null;
  if( iCnt>1 ){
    rc = SQLITE_LOCKED;
    p->errorAction = OE_Abort;
  }else{
    iDb = pOp->p3;
    assert( iCnt==1 );
    assert( (p->btreeMask & (1<<iDb))!=0 );
    rc = sqlite3BtreeDropTable(db->aDb[iDb].pBt, pOp->p1, &iMoved);
    pOut->flags = MEM_Int;
    pOut->u.i = iMoved;
#ifndef SQLITE_OMIT_AUTOVACUUM
    if( rc==SQLITE_OK && iMoved!=0 ){
      sqlite3RootPageMoved(&db->aDb[iDb], iMoved, pOp->p1);
    }
#endif
  }
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
    /* flags = BTREE_INTKEY; */
    flags = BTREE_LEAFDATA|BTREE_INTKEY;
  }else{
    flags = BTREE_ZERODATA;
  }
  rc = sqlite3BtreeCreateTable(pDb->pBt, &pgno, flags);
  pOut->u.i = pgno;
  MemSetTypeFlag(pOut, MEM_Int);
  break;
}

/* Opcode: ParseSchema P1 P2 * P4 *
**
** Read and parse all entries from the SQLITE_MASTER table of database P1
** that match the WHERE clause P4.  P2 is the "force" flag.   Always do







<







4507
4508
4509
4510
4511
4512
4513

4514
4515
4516
4517
4518
4519
4520
    /* flags = BTREE_INTKEY; */
    flags = BTREE_LEAFDATA|BTREE_INTKEY;
  }else{
    flags = BTREE_ZERODATA;
  }
  rc = sqlite3BtreeCreateTable(pDb->pBt, &pgno, flags);
  pOut->u.i = pgno;

  break;
}

/* Opcode: ParseSchema P1 P2 * P4 *
**
** Read and parse all entries from the SQLITE_MASTER table of database P1
** that match the WHERE clause P4.  P2 is the "force" flag.   Always do
4668
4669
4670
4671
4672
4673
4674


4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692

4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
**
** Insert the integer value held by register P2 into a boolean index
** held in register P1.
**
** An assertion fails if P2 is not an integer.
*/
case OP_RowSetAdd: {       /* in1, in2 */


  assert( (pIn2->flags & MEM_Int)!=0 );
  if( (pIn1->flags & MEM_RowSet)==0 ){
    sqlite3VdbeMemSetRowSet(pIn1);
    if( (pIn1->flags & MEM_RowSet)==0 ) goto no_mem;
  }
  sqlite3RowSetInsert(pIn1->u.pRowSet, pIn2->u.i);
  break;
}

/* Opcode: RowSetRead P1 P2 P3 * *
**
** Extract the smallest value from boolean index P1 and put that value into
** register P3.  Or, if boolean index P1 is initially empty, leave P3
** unchanged and jump to instruction P2.
*/
case OP_RowSetRead: {       /* jump, in1, out3 */
  i64 val;
  CHECK_FOR_INTERRUPT;

  if( (pIn1->flags & MEM_RowSet)==0 
   || sqlite3RowSetNext(pIn1->u.pRowSet, &val)==0
  ){
    /* The boolean index is empty */
    sqlite3VdbeMemSetNull(pIn1);
    pc = pOp->p2 - 1;
  }else{
    /* A value was pulled from the index */
    sqlite3VdbeMemSetInt64(pOut, val);
  }
  break;
}

/* Opcode: RowSetTest P1 P2 P3 P4
**
** Register P3 is assumed to hold a 64-bit integer value. If register P1







>
>


















>








|







4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
**
** Insert the integer value held by register P2 into a boolean index
** held in register P1.
**
** An assertion fails if P2 is not an integer.
*/
case OP_RowSetAdd: {       /* in1, in2 */
  pIn1 = &aMem[pOp->p1];
  pIn2 = &aMem[pOp->p2];
  assert( (pIn2->flags & MEM_Int)!=0 );
  if( (pIn1->flags & MEM_RowSet)==0 ){
    sqlite3VdbeMemSetRowSet(pIn1);
    if( (pIn1->flags & MEM_RowSet)==0 ) goto no_mem;
  }
  sqlite3RowSetInsert(pIn1->u.pRowSet, pIn2->u.i);
  break;
}

/* Opcode: RowSetRead P1 P2 P3 * *
**
** Extract the smallest value from boolean index P1 and put that value into
** register P3.  Or, if boolean index P1 is initially empty, leave P3
** unchanged and jump to instruction P2.
*/
case OP_RowSetRead: {       /* jump, in1, out3 */
  i64 val;
  CHECK_FOR_INTERRUPT;
  pIn1 = &aMem[pOp->p1];
  if( (pIn1->flags & MEM_RowSet)==0 
   || sqlite3RowSetNext(pIn1->u.pRowSet, &val)==0
  ){
    /* The boolean index is empty */
    sqlite3VdbeMemSetNull(pIn1);
    pc = pOp->p2 - 1;
  }else{
    /* A value was pulled from the index */
    sqlite3VdbeMemSetInt64(&aMem[pOp->p3], val);
  }
  break;
}

/* Opcode: RowSetTest P1 P2 P3 P4
**
** Register P3 is assumed to hold a 64-bit integer value. If register P1
4726
4727
4728
4729
4730
4731
4732


4733
4734
4735
4736
4737
4738
4739
** previously inserted as part of set X (only if it was previously
** inserted as part of some other set).
*/
case OP_RowSetTest: {                     /* jump, in1, in3 */
  int iSet;
  int exists;



  iSet = pOp->p4.i;
  assert( pIn3->flags&MEM_Int );

  /* If there is anything other than a rowset object in memory cell P1,
  ** delete it now and initialize P1 with an empty rowset
  */
  if( (pIn1->flags & MEM_RowSet)==0 ){







>
>







4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
** previously inserted as part of set X (only if it was previously
** inserted as part of some other set).
*/
case OP_RowSetTest: {                     /* jump, in1, in3 */
  int iSet;
  int exists;

  pIn1 = &aMem[pOp->p1];
  pIn3 = &aMem[pOp->p3];
  iSet = pOp->p4.i;
  assert( pIn3->flags&MEM_Int );

  /* If there is anything other than a rowset object in memory cell P1,
  ** delete it now and initialize P1 with an empty rowset
  */
  if( (pIn1->flags & MEM_RowSet)==0 ){
4952
4953
4954
4955
4956
4957
4958

4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974

4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989

4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005

5006
5007
5008
5009
5010
5011
5012
  if( p->pFrame ){
    for(pFrame=p->pFrame; pFrame->pParent; pFrame=pFrame->pParent);
    pIn1 = &pFrame->aMem[pOp->p1];
  }else{
    pIn1 = &aMem[pOp->p1];
  }
  sqlite3VdbeMemIntegerify(pIn1);

  sqlite3VdbeMemIntegerify(pIn2);
  if( pIn1->u.i<pIn2->u.i){
    pIn1->u.i = pIn2->u.i;
  }
  break;
}
#endif /* SQLITE_OMIT_AUTOINCREMENT */

/* Opcode: IfPos P1 P2 * * *
**
** If the value of register P1 is 1 or greater, jump to P2.
**
** It is illegal to use this instruction on a register that does
** not contain an integer.  An assertion fault will result if you try.
*/
case OP_IfPos: {        /* jump, in1 */

  assert( pIn1->flags&MEM_Int );
  if( pIn1->u.i>0 ){
     pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: IfNeg P1 P2 * * *
**
** If the value of register P1 is less than zero, jump to P2. 
**
** It is illegal to use this instruction on a register that does
** not contain an integer.  An assertion fault will result if you try.
*/
case OP_IfNeg: {        /* jump, in1 */

  assert( pIn1->flags&MEM_Int );
  if( pIn1->u.i<0 ){
     pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: IfZero P1 P2 P3 * *
**
** The register P1 must contain an integer.  Add literal P3 to the
** value in register P1.  If the result is exactly 0, jump to P2. 
**
** It is illegal to use this instruction on a register that does
** not contain an integer.  An assertion fault will result if you try.
*/
case OP_IfZero: {        /* jump, in1 */

  assert( pIn1->flags&MEM_Int );
  pIn1->u.i += pOp->p3;
  if( pIn1->u.i==0 ){
     pc = pOp->p2 - 1;
  }
  break;
}







>
















>















>
















>







4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
  if( p->pFrame ){
    for(pFrame=p->pFrame; pFrame->pParent; pFrame=pFrame->pParent);
    pIn1 = &pFrame->aMem[pOp->p1];
  }else{
    pIn1 = &aMem[pOp->p1];
  }
  sqlite3VdbeMemIntegerify(pIn1);
  pIn2 = &aMem[pOp->p2];
  sqlite3VdbeMemIntegerify(pIn2);
  if( pIn1->u.i<pIn2->u.i){
    pIn1->u.i = pIn2->u.i;
  }
  break;
}
#endif /* SQLITE_OMIT_AUTOINCREMENT */

/* Opcode: IfPos P1 P2 * * *
**
** If the value of register P1 is 1 or greater, jump to P2.
**
** It is illegal to use this instruction on a register that does
** not contain an integer.  An assertion fault will result if you try.
*/
case OP_IfPos: {        /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags&MEM_Int );
  if( pIn1->u.i>0 ){
     pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: IfNeg P1 P2 * * *
**
** If the value of register P1 is less than zero, jump to P2. 
**
** It is illegal to use this instruction on a register that does
** not contain an integer.  An assertion fault will result if you try.
*/
case OP_IfNeg: {        /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags&MEM_Int );
  if( pIn1->u.i<0 ){
     pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: IfZero P1 P2 P3 * *
**
** The register P1 must contain an integer.  Add literal P3 to the
** value in register P1.  If the result is exactly 0, jump to P2. 
**
** It is illegal to use this instruction on a register that does
** not contain an integer.  An assertion fault will result if you try.
*/
case OP_IfZero: {        /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags&MEM_Int );
  pIn1->u.i += pOp->p3;
  if( pIn1->u.i==0 ){
     pc = pOp->p2 - 1;
  }
  break;
}
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
  p1 = pOp->p1; 
  pPager = sqlite3BtreePager(db->aDb[p1].pBt);
  rc = sqlite3PagerPagecount(pPager, &nPage);
  /* OP_Pagecount is always called from within a read transaction.  The
  ** page count has already been successfully read and cached.  So the
  ** sqlite3PagerPagecount() call above cannot fail. */
  if( ALWAYS(rc==SQLITE_OK) ){
    pOut->flags = MEM_Int;
    pOut->u.i = nPage;
  }
  break;
}
#endif

#ifndef SQLITE_OMIT_TRACE







<







5607
5608
5609
5610
5611
5612
5613

5614
5615
5616
5617
5618
5619
5620
  p1 = pOp->p1; 
  pPager = sqlite3BtreePager(db->aDb[p1].pBt);
  rc = sqlite3PagerPagecount(pPager, &nPage);
  /* OP_Pagecount is always called from within a read transaction.  The
  ** page count has already been successfully read and cached.  So the
  ** sqlite3PagerPagecount() call above cannot fail. */
  if( ALWAYS(rc==SQLITE_OK) ){

    pOut->u.i = nPage;
  }
  break;
}
#endif

#ifndef SQLITE_OMIT_TRACE
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
    */
#ifndef NDEBUG
    assert( pc>=-1 && pc<p->nOp );

#ifdef SQLITE_DEBUG
    if( p->trace ){
      if( rc!=0 ) fprintf(p->trace,"rc=%d\n",rc);
      if( opProperty & OPFLG_OUT2_PRERELEASE ){
        registerTrace(p->trace, pOp->p2, pOut);
      }
      if( opProperty & OPFLG_OUT3 ){
        registerTrace(p->trace, pOp->p3, pOut);
      }
    }
#endif  /* SQLITE_DEBUG */
#endif  /* NDEBUG */
  }  /* The end of the for(;;) loop the loops through opcodes */

  /* If we reach this point, it means that execution is finished with







|
|

|
|







5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
    */
#ifndef NDEBUG
    assert( pc>=-1 && pc<p->nOp );

#ifdef SQLITE_DEBUG
    if( p->trace ){
      if( rc!=0 ) fprintf(p->trace,"rc=%d\n",rc);
      if( pOp->opflags & (OPFLG_OUT2_PRERELEASE|OPFLG_OUT2) ){
        registerTrace(p->trace, pOp->p2, &aMem[pOp->p2]);
      }
      if( pOp->opflags & OPFLG_OUT3 ){
        registerTrace(p->trace, pOp->p3, &aMem[pOp->p3]);
      }
    }
#endif  /* SQLITE_DEBUG */
#endif  /* NDEBUG */
  }  /* The end of the for(;;) loop the loops through opcodes */

  /* If we reach this point, it means that execution is finished with