out1[name] = 0
  out2[name] = 0
  out3[name] = 0
  jump[name] = 0
  in1[name] = 0
  in2[name] = 0
  in3[name] = 0

  for(i=3; i<NF; i++){
    if($i=="same" && $(i+1)=="as"){
      sym = $(i+2)
      sub(/,/,"",sym)
      op[name] = tk[sym]
      used[op[name]] = 1
      sameas[op[name]] = sym
................................................................................
  #  bit 4:     input on P1
  #  bit 5:     input on P2
  #  bit 6:     input on P3
  #  bit 7:     pushes a result onto stack
  #
  for(i=0; i<=max; i++) bv[i] = 0;
  for(name in op){
    x = op[name]
    if( jump[name] ) bv[x] += 0x01;
    if( out1[name] ) bv[x] += 0x02;
    if( out2[name] ) bv[x] += 0x04;
    if( out3[name] ) bv[x] += 0x08;
    if( in1[name] ) bv[x] += 0x10;
    if( in2[name] ) bv[x] += 0x20;
    if( in3[name] ) bv[x] += 0x40;
    if( !nopush[name] ) bv[x] += 0x80;
  }
  print "\n"
  print "/* Properties such as \"out2\" or \"jump\" that are specified in"
  print "** comments following the "case" for each opcode in the vdbe.c"
  print "** are encoded into bitvectors as follows:"
  print "*/"
  print "#define OPFLG_JUMP     0x01    /* jump:  P2 holds a jump target */"

  out1[name] = 0
  out2[name] = 0
  out3[name] = 0
  jump[name] = 0
  in1[name] = 0
  in2[name] = 0
  in3[name] = 0
  nopush[name] = 0
  for(i=3; i<NF; i++){
    if($i=="same" && $(i+1)=="as"){
      sym = $(i+2)
      sub(/,/,"",sym)
      op[name] = tk[sym]
      used[op[name]] = 1
      sameas[op[name]] = sym
................................................................................
  #  bit 4:     input on P1
  #  bit 5:     input on P2
  #  bit 6:     input on P3
  #  bit 7:     pushes a result onto stack
  #
  for(i=0; i<=max; i++) bv[i] = 0;
  for(name in op){

    if( jump[name] ) bv[x] += 0x01;
    if( out1[name] ) bv[x] += 0x02;
    if( out2[name] ) bv[x] += 0x04;
    if( out3[name] ) bv[x] += 0x08;
    if( in1[name] ) bv[x] += 0x10;
    if( in2[name] ) bv[x] += 0x20;
    if( in3[name] ) bv[x] += 0x40;
    if( 0 == nopush[name] ) bv[x] = bv[x] + 0x80;
  }
  print "\n"
  print "/* Properties such as \"out2\" or \"jump\" that are specified in"
  print "** comments following the "case" for each opcode in the vdbe.c"
  print "** are encoded into bitvectors as follows:"
  print "*/"
  print "#define OPFLG_JUMP     0x01    /* jump:  P2 holds a jump target */"

**    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 1.146 2008/01/04 13:57:26 danielk1977 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.
................................................................................
  Vdbe *v = sqlite3GetVdbe(p);
  assert(v);
  p->nMem += nVal;
  for(i=nVal-1; i>=0; i--){
    sqlite3VdbeAddOp2(v, OP_MemStore, iRet+i, 1);
  }
  return iRet;








}

/*
** Generate code that will open a table for reading.
*/
void sqlite3OpenTable(
  Parse *p,       /* Generate code into this VDBE */

**    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 1.147 2008/01/04 19:10:29 danielk1977 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.
................................................................................
  Vdbe *v = sqlite3GetVdbe(p);
  assert(v);
  p->nMem += nVal;
  for(i=nVal-1; i>=0; i--){
    sqlite3VdbeAddOp2(v, OP_MemStore, iRet+i, 1);
  }
  return iRet;
}
void sqlite3RegToStack(Parse *p, int iReg, int nVal){
  int i;
  Vdbe *v = sqlite3GetVdbe(p);
  assert(v);
  for(i=0; i<nVal; i++){
    sqlite3VdbeAddOp2(v, OP_MemLoad, iReg+i, 0);
  }
}

/*
** Generate code that will open a table for reading.
*/
void sqlite3OpenTable(
  Parse *p,       /* Generate code into this VDBE */

**    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 1.209 2008/01/04 13:24:29 danielk1977 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:
................................................................................
** Update the maximum rowid for an autoincrement calculation.
**
** This routine should be called when the top of the stack holds a
** new rowid that is about to be inserted.  If that new rowid is
** larger than the maximum rowid in the memId memory cell, then the
** memory cell is updated.  The stack is unchanged.
*/
static void autoIncStep(Parse *pParse, int memId){
  if( memId>0 ){
    sqlite3VdbeAddOp2(pParse->pVdbe, OP_MemMax, memId, 0);
  }
}

/*
** After doing one or more inserts, the maximum rowid is stored
** in mem[memId].  Generate code to write this value back into the
** the sqlite_sequence table.
................................................................................
}
#else
/*
** If SQLITE_OMIT_AUTOINCREMENT is defined, then the three routines
** above are all no-ops
*/
# define autoIncBegin(A,B,C) (0)
# define autoIncStep(A,B)
# define autoIncEnd(A,B,C,D)
#endif /* SQLITE_OMIT_AUTOINCREMENT */


/* Forward declaration */
static int xferOptimization(
  Parse *pParse,        /* Parser context */
................................................................................

  /* Push the record number for the new entry onto the stack.  The
  ** record number is a randomly generate integer created by NewRowid
  ** except when the table has an INTEGER PRIMARY KEY column, in which
  ** case the record number is the same as that column. 
  */
  if( !isView ){




    if( IsVirtual(pTab) ){
      /* The row that the VUpdate opcode will delete:  none */
      sqlite3VdbeAddOp2(v, OP_Null, 0, 0);
    }
    if( keyColumn>=0 ){
      if( useTempTable ){
        sqlite3VdbeAddOp2(v, OP_Column, srcTab, keyColumn);
      }else if( pSelect ){
        sqlite3VdbeAddOp2(v, OP_Dup, nColumn - keyColumn - 1, 1);


      }else{
        VdbeOp *pOp;
        sqlite3ExprCode(pParse, pList->a[keyColumn].pExpr, 0);
        pOp = sqlite3VdbeGetOp(v, sqlite3VdbeCurrentAddr(v) - 1);
        if( pOp && pOp->opcode==OP_Null ){
          appendFlag = 1;
          pOp->opcode = OP_NewRowid;
          pOp->p1 = base;
          pOp->p2 = counterMem;




        }
      }
      /* If the PRIMARY KEY expression is NULL, then use OP_NewRowid
      ** to generate a unique primary key value.
      */
      if( !appendFlag ){
        sqlite3VdbeAddOp2(v, OP_NotNull, -1, sqlite3VdbeCurrentAddr(v)+3);
        sqlite3VdbeAddOp2(v, OP_Pop, 1, 0);
        sqlite3VdbeAddOp2(v, OP_NewRowid, base, counterMem);
        sqlite3VdbeAddOp2(v, OP_MustBeInt, 0, 0);
      }
    }else if( IsVirtual(pTab) ){
      sqlite3VdbeAddOp2(v, OP_Null, 0, 0);
    }else{
      sqlite3VdbeAddOp2(v, OP_NewRowid, base, counterMem);

      appendFlag = 1;
    }
    autoIncStep(pParse, counterMem);

    /* Push onto the stack, data for all columns of the new entry, beginning
    ** with the first column.
    */
    nHidden = 0;
    for(i=0; i<pTab->nCol; i++){

      if( i==pTab->iPKey ){
        /* The value of the INTEGER PRIMARY KEY column is always a NULL.
        ** Whenever this column is read, the record number will be substituted
        ** in its place.  So will fill this column with a NULL to avoid
        ** taking up data space with information that will never be used. */
        sqlite3VdbeAddOp2(v, OP_Null, 0, 0);
        continue;
      }
      if( pColumn==0 ){
        if( IsHiddenColumn(&pTab->aCol[i]) ){
          assert( IsVirtual(pTab) );
          j = -1;
          nHidden++;
................................................................................
        }
      }else{
        for(j=0; j<pColumn->nId; j++){
          if( pColumn->a[j].idx==i ) break;
        }
      }
      if( j<0 || nColumn==0 || (pColumn && j>=pColumn->nId) ){
        sqlite3ExprCode(pParse, pTab->aCol[i].pDflt, 0);
      }else if( useTempTable ){
        sqlite3VdbeAddOp2(v, OP_Column, srcTab, j); 
      }else if( pSelect ){
        sqlite3VdbeAddOp2(v, OP_Dup, i+nColumn-j+IsVirtual(pTab), 1);


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

    /* Generate code to check constraints and generate index keys and
    ** do the insertion.
    */
#ifndef SQLITE_OMIT_VIRTUALTABLE
    if( IsVirtual(pTab) ){
      int iReg = sqlite3StackToReg(pParse, pTab->nCol+2);
      pParse->pVirtualLock = pTab;
      sqlite3VdbeAddOp4(v, OP_VUpdate, 1, pTab->nCol+2, iReg,
                     (const char*)pTab->pVtab, P4_VTAB);
    }else
#endif
    {

      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);
    }
  }
................................................................................
  if( pDest->iPKey>=0 ){
    addr1 = sqlite3VdbeAddOp2(v, OP_Rowid, iSrc, 0);
    sqlite3VdbeAddOp2(v, OP_Dup, 0, 0);
    addr2 = sqlite3VdbeAddOp2(v, OP_NotExists, iDest, 0);
    sqlite3VdbeAddOp4(v, OP_Halt, SQLITE_CONSTRAINT, onError, 0,
                      "PRIMARY KEY must be unique", P4_STATIC);
    sqlite3VdbeJumpHere(v, addr2);
    autoIncStep(pParse, counterMem);
  }else if( pDest->pIndex==0 ){
    addr1 = sqlite3VdbeAddOp2(v, OP_NewRowid, iDest, 0);
  }else{
    addr1 = sqlite3VdbeAddOp2(v, OP_Rowid, iSrc, 0);
    assert( pDest->autoInc==0 );
  }
  sqlite3VdbeAddOp2(v, OP_RowData, iSrc, 0);

**    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 1.210 2008/01/04 19:10:29 danielk1977 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:
................................................................................
** Update the maximum rowid for an autoincrement calculation.
**
** This routine should be called when the top of the stack holds a
** new rowid that is about to be inserted.  If that new rowid is
** larger than the maximum rowid in the memId memory cell, then the
** memory cell is updated.  The stack is unchanged.
*/
static void autoIncStep(Parse *pParse, int memId, int iRowid){
  if( memId>0 ){
    sqlite3VdbeAddOp2(pParse->pVdbe, OP_MemMax, memId, iRowid);
  }
}

/*
** After doing one or more inserts, the maximum rowid is stored
** in mem[memId].  Generate code to write this value back into the
** the sqlite_sequence table.
................................................................................
}
#else
/*
** If SQLITE_OMIT_AUTOINCREMENT is defined, then the three routines
** above are all no-ops
*/
# define autoIncBegin(A,B,C) (0)
# define autoIncStep(A,B,C)
# define autoIncEnd(A,B,C,D)
#endif /* SQLITE_OMIT_AUTOINCREMENT */


/* Forward declaration */
static int xferOptimization(
  Parse *pParse,        /* Parser context */
................................................................................

  /* Push the record number for the new entry onto the stack.  The
  ** record number is a randomly generate integer created by NewRowid
  ** except when the table has an INTEGER PRIMARY KEY column, in which
  ** case the record number is the same as that column. 
  */
  if( !isView ){
    int iReg = pParse->nMem+1;
    int iRowid = iReg+(IsVirtual(pTab)?1:0);
    pParse->nMem += pTab->nCol + (IsVirtual(pTab)?2:1);

    if( IsVirtual(pTab) ){
      /* The row that the VUpdate opcode will delete: none */
      sqlite3VdbeAddOp2(v, OP_MemNull, 0, iReg);
    }
    if( keyColumn>=0 ){
      if( useTempTable ){
        sqlite3VdbeAddOp3(v, OP_Column, srcTab, keyColumn, iRowid);
      }else if( pSelect ){
        sqlite3VdbeAddOp3(v, OP_Dup, nColumn - keyColumn - 1, 1, iRowid);
        /* TODO: Avoid this use of the stack. */
        sqlite3VdbeAddOp2(v, OP_MemStore, iRowid, 1);
      }else{
        VdbeOp *pOp;
        sqlite3ExprCode(pParse, pList->a[keyColumn].pExpr, 0);
        pOp = sqlite3VdbeGetOp(v, sqlite3VdbeCurrentAddr(v) - 1);
        if( pOp && pOp->opcode==OP_Null ){
          appendFlag = 1;
          pOp->opcode = OP_NewRowid;
          pOp->p1 = base;
          pOp->p2 = counterMem;
          pOp->p3 = iRowid;
        }else{
          /* TODO: Avoid this use of the stack. */
          sqlite3VdbeAddOp2(v, OP_MemStore, iRowid, 1);
        }
      }
      /* If the PRIMARY KEY expression is NULL, then use OP_NewRowid
      ** to generate a unique primary key value.
      */
      if( !appendFlag ){
        sqlite3VdbeAddOp2(v, OP_IfMemNull, iRowid, sqlite3VdbeCurrentAddr(v)+2);
        sqlite3VdbeAddOp2(v, OP_Goto, -1, sqlite3VdbeCurrentAddr(v)+2);
        sqlite3VdbeAddOp3(v, OP_NewRowid, base, counterMem, iRowid);
        sqlite3VdbeAddOp3(v, OP_MustBeInt, 0, 0, iRowid);
      }
    }else if( IsVirtual(pTab) ){
      sqlite3VdbeAddOp2(v, OP_MemNull, 0, iRowid);
    }else{
      sqlite3VdbeAddOp2(v, OP_NewRowid, base, counterMem);
      sqlite3VdbeAddOp2(v, OP_MemStore, iRowid, 1);
      appendFlag = 1;
    }
    autoIncStep(pParse, counterMem, iRowid);

    /* Push onto the stack, data for all columns of the new entry, beginning
    ** with the first column.
    */
    nHidden = 0;
    for(i=0; i<pTab->nCol; i++){
      int iRegStore = iRowid+1+i;
      if( i==pTab->iPKey ){
        /* The value of the INTEGER PRIMARY KEY column is always a NULL.
        ** Whenever this column is read, the record number will be substituted
        ** in its place.  So will fill this column with a NULL to avoid
        ** taking up data space with information that will never be used. */
        sqlite3VdbeAddOp2(v, OP_MemNull, 0, iRegStore);
        continue;
      }
      if( pColumn==0 ){
        if( IsHiddenColumn(&pTab->aCol[i]) ){
          assert( IsVirtual(pTab) );
          j = -1;
          nHidden++;
................................................................................
        }
      }else{
        for(j=0; j<pColumn->nId; j++){
          if( pColumn->a[j].idx==i ) break;
        }
      }
      if( j<0 || nColumn==0 || (pColumn && j>=pColumn->nId) ){
        sqlite3ExprCode(pParse, pTab->aCol[i].pDflt, iRegStore);
      }else if( useTempTable ){
        sqlite3VdbeAddOp3(v, OP_Column, srcTab, j, iRegStore); 
      }else if( pSelect ){
        sqlite3VdbeAddOp2(v, OP_Dup, nColumn-j-1, 1);
        /* TODO: Avoid this use of the stack */
        sqlite3VdbeAddOp2(v, OP_MemStore, iRegStore, 1);
      }else{
        sqlite3ExprCode(pParse, pList->a[j].pExpr, iRegStore);
      }
    }

    /* Generate code to check constraints and generate index keys and
    ** do the insertion.
    */
#ifndef SQLITE_OMIT_VIRTUALTABLE
    if( IsVirtual(pTab) ){

      pParse->pVirtualLock = pTab;
      sqlite3VdbeAddOp4(v, OP_VUpdate, 1, pTab->nCol+2, iReg,
                     (const char*)pTab->pVtab, P4_VTAB);
    }else
#endif
    {
      sqlite3RegToStack(pParse, iReg, 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);
    }
  }
................................................................................
  if( pDest->iPKey>=0 ){
    addr1 = sqlite3VdbeAddOp2(v, OP_Rowid, iSrc, 0);
    sqlite3VdbeAddOp2(v, OP_Dup, 0, 0);
    addr2 = sqlite3VdbeAddOp2(v, OP_NotExists, iDest, 0);
    sqlite3VdbeAddOp4(v, OP_Halt, SQLITE_CONSTRAINT, onError, 0,
                      "PRIMARY KEY must be unique", P4_STATIC);
    sqlite3VdbeJumpHere(v, addr2);
    autoIncStep(pParse, counterMem, 0);
  }else if( pDest->pIndex==0 ){
    addr1 = sqlite3VdbeAddOp2(v, OP_NewRowid, iDest, 0);
  }else{
    addr1 = sqlite3VdbeAddOp2(v, OP_Rowid, iSrc, 0);
    assert( pDest->autoInc==0 );
  }
  sqlite3VdbeAddOp2(v, OP_RowData, iSrc, 0);

**    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 1.637 2008/01/04 13:24:29 danielk1977 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
................................................................................
int sqlite3OpenTempDatabase(Parse *);

void sqlite3StrAccumAppend(StrAccum*,const char*,int);
char *sqlite3StrAccumFinish(StrAccum*);
void sqlite3StrAccumReset(StrAccum*);
void sqlite3CodeInsert(Parse *, int, u8);
int sqlite3StackToReg(Parse *, int);


/*
** The interface to the LEMON-generated parser
*/
void *sqlite3ParserAlloc(void*(*)(size_t));
void sqlite3ParserFree(void*, void(*)(void*));
void sqlite3Parser(void*, int, Token, Parse*);

**    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 1.638 2008/01/04 19:10:29 danielk1977 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
................................................................................
int sqlite3OpenTempDatabase(Parse *);

void sqlite3StrAccumAppend(StrAccum*,const char*,int);
char *sqlite3StrAccumFinish(StrAccum*);
void sqlite3StrAccumReset(StrAccum*);
void sqlite3CodeInsert(Parse *, int, u8);
int sqlite3StackToReg(Parse *, int);
void sqlite3RegToStack(Parse *, int, int);

/*
** The interface to the LEMON-generated parser
*/
void *sqlite3ParserAlloc(void*(*)(size_t));
void sqlite3ParserFree(void*, void(*)(void*));
void sqlite3Parser(void*, int, Token, Parse*);

**    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 1.156 2008/01/04 13:57:26 danielk1977 Exp $
*/
#include "sqliteInt.h"

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Forward declaration */
static void updateVirtualTable(
  Parse *pParse,       /* The parsing context */
................................................................................
  Vdbe *v = pParse->pVdbe;  /* Virtual machine under construction */
  ExprList *pEList = 0;     /* The result set of the SELECT statement */
  Select *pSelect = 0;      /* The SELECT statement */
  Expr *pExpr;              /* Temporary expression */
  int ephemTab;             /* Table holding the result of the SELECT */
  int i;                    /* Loop counter */
  int addr;                 /* Address of top of loop */

  sqlite3 *db = pParse->db; /* Database connection */

  SelectDest dest = {SRT_Table, 0, 0};

  /* Construct the SELECT statement that will find the new values for
  ** all updated rows. 
  */
  pEList = sqlite3ExprListAppend(pParse, 0, 
                                 sqlite3CreateIdExpr(pParse, "_rowid_"), 0);
................................................................................
  sqlite3VdbeAddOp2(v, OP_OpenEphemeral, ephemTab, pTab->nCol+1+(pRowid!=0));

  /* fill the ephemeral table 
  */
  dest.iParm = ephemTab;
  sqlite3Select(pParse, pSelect, &dest, 0, 0, 0, 0);

  /*
  ** Generate code to scan the ephemeral table and call VDelete and

  ** VInsert
  */
  sqlite3VdbeAddOp2(v, OP_Rewind, ephemTab, 0);
  addr = sqlite3VdbeCurrentAddr(v);
  sqlite3VdbeAddOp2(v, OP_Column,  ephemTab, 0);
  if( pRowid ){
    sqlite3VdbeAddOp2(v, OP_Column, ephemTab, 1);
  }else{
    sqlite3VdbeAddOp2(v, OP_Dup, 0, 0);
  }
  for(i=0; i<pTab->nCol; i++){
    sqlite3VdbeAddOp2(v, OP_Column, ephemTab, i+1+(pRowid!=0));
  }
  pParse->pVirtualLock = pTab;
  sqlite3VdbeAddOp4(v, OP_VUpdate, 0, pTab->nCol+2, 
      sqlite3StackToReg(pParse, pTab->nCol+2), 
      (const char*)pTab->pVtab, P4_VTAB
  );
  sqlite3VdbeAddOp2(v, OP_Next, ephemTab, addr);
  sqlite3VdbeJumpHere(v, addr-1);
  sqlite3VdbeAddOp2(v, OP_Close, ephemTab, 0);

  /* Cleanup */
  sqlite3SelectDelete(pSelect);  
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

**    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 1.157 2008/01/04 19:10:29 danielk1977 Exp $
*/
#include "sqliteInt.h"

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Forward declaration */
static void updateVirtualTable(
  Parse *pParse,       /* The parsing context */
................................................................................
  Vdbe *v = pParse->pVdbe;  /* Virtual machine under construction */
  ExprList *pEList = 0;     /* The result set of the SELECT statement */
  Select *pSelect = 0;      /* The SELECT statement */
  Expr *pExpr;              /* Temporary expression */
  int ephemTab;             /* Table holding the result of the SELECT */
  int i;                    /* Loop counter */
  int addr;                 /* Address of top of loop */
  int iReg;                 /* First register in set passed to OP_VUpdate */
  sqlite3 *db = pParse->db; /* Database connection */
  const char *pVtab = (const char*)pTab->pVtab;
  SelectDest dest = {SRT_Table, 0, 0};

  /* Construct the SELECT statement that will find the new values for
  ** all updated rows. 
  */
  pEList = sqlite3ExprListAppend(pParse, 0, 
                                 sqlite3CreateIdExpr(pParse, "_rowid_"), 0);
................................................................................
  sqlite3VdbeAddOp2(v, OP_OpenEphemeral, ephemTab, pTab->nCol+1+(pRowid!=0));

  /* fill the ephemeral table 
  */
  dest.iParm = ephemTab;
  sqlite3Select(pParse, pSelect, &dest, 0, 0, 0, 0);


  /* Generate code to scan the ephemeral table and call VUpdate. */
  iReg = ++pParse->nMem;
  pParse->nMem += pTab->nCol+1;

  sqlite3VdbeAddOp2(v, OP_Rewind, ephemTab, 0);
  addr = sqlite3VdbeCurrentAddr(v);
  sqlite3VdbeAddOp3(v, OP_Column,  ephemTab, 0, iReg);

  sqlite3VdbeAddOp3(v, OP_Column, ephemTab, (pRowid?1:0), iReg+1);



  for(i=0; i<pTab->nCol; i++){
    sqlite3VdbeAddOp3(v, OP_Column, ephemTab, i+1+(pRowid!=0), iReg+2+i);
  }
  pParse->pVirtualLock = pTab;
  sqlite3VdbeAddOp4(v, OP_VUpdate, 0, pTab->nCol+2, iReg, pVtab, P4_VTAB);



  sqlite3VdbeAddOp2(v, OP_Next, ephemTab, addr);
  sqlite3VdbeJumpHere(v, addr-1);
  sqlite3VdbeAddOp2(v, OP_Close, ephemTab, 0);

  /* Cleanup */
  sqlite3SelectDelete(pSelect);  
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

**
** 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 1.677 2008/01/04 16:50:09 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
** The following global variable is incremented every time a cursor
................................................................................
    /* This is to check to make sure that the OPFLG_PUSH property
    ** is set correctly on all opcodes.
    */ 
    pStackLimit = pTos;
    if( sqlite3VdbeOpcodeHasProperty(pOp->opcode, OPFLG_PUSH) ){
      pStackLimit++;
    }

#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
................................................................................
  }
  Release(pTos);
  pTos->u.i = v;
  pTos->flags = MEM_Int;
  break;
}

/* Opcode: MustBeInt P1 P2 *
** 
** Force the top of the stack to be an integer.  If the top of the
** stack 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.
**
** If the top of the stack is not an integer and P2 is not zero and
** P1 is 1, then the stack is popped.  In all other cases, the depth
** of the stack is unchanged.



*/
case OP_MustBeInt: {            /* no-push, jump */

  assert( pTos>=p->aStack );

  applyAffinity(pTos, SQLITE_AFF_NUMERIC, encoding);
  if( (pTos->flags & MEM_Int)==0 ){
    if( pOp->p2==0 ){
      rc = SQLITE_MISMATCH;
      goto abort_due_to_error;
    }else{
      if( pOp->p1 ) popStack(&pTos, 1);
      pc = pOp->p2 - 1;
    }
  }else{
    Release(pTos);
    pTos->flags = MEM_Int;
  }
  break;
}

/* Opcode: RealAffinity P1 * *
**
** If register P1 holds an integer convert it to a real value.
................................................................................
  pTos++;
  pTos->u.i = p->apCsr[i]->seqCount++;
  pTos->flags = MEM_Int;
  break;
}


/* Opcode: NewRowid P1 P2 *
**
** Get a new integer record number (a.k.a "rowid") used as the key to a table.
** The record number is not previously used as a key in the database
** table that cursor P1 points to.  The new record number is pushed 
** onto the stack.
**
** If P2>0 then P2 is a memory cell that holds the largest previously
** generated record number.  No new record numbers are allowed to be less
** than this value.  When this value reaches its maximum, a SQLITE_FULL
** error is generated.  The P2 memory cell is updated with the generated
** record number.  This P2 mechanism is used to help implement the
** AUTOINCREMENT feature.
................................................................................
        goto abort_due_to_error;
      }
    }
    pC->rowidIsValid = 0;
    pC->deferredMoveto = 0;
    pC->cacheStatus = CACHE_STALE;
  }



  pTos++;
  pTos->u.i = v;
  pTos->flags = MEM_Int;

  break;
}

/* Opcode: Insert P1 P2 P3 P4 P5
**
** Write an entry into the table of cursor P1.  A new entry is
** created if it doesn't already exist or the data for an existing
................................................................................
  assert( i>0 && i<=p->nMem );
  pTos++;
  sqlite3VdbeMemShallowCopy(pTos, &p->aMem[i], MEM_Ephem);
  break;
}

#ifndef SQLITE_OMIT_AUTOINCREMENT
/* Opcode: MemMax P1 * *
**
** Set the value of memory cell P1 to the maximum of its current value

** and the value on the top of the stack.  The stack is unchanged.
**
** This instruction throws an error if the memory cell is not initially
** an integer.
*/
case OP_MemMax: {        /* no-push */
  int i = pOp->p1;
  Mem *pMem;

  assert( pTos>=p->aStack );
  assert( i>0 && i<=p->nMem );
  pMem = &p->aMem[i];
  sqlite3VdbeMemIntegerify(pMem);
  sqlite3VdbeMemIntegerify(pTos);
  if( pMem->u.i<pTos->u.i){
    pMem->u.i = pTos->u.i;
  }
  break;
}
#endif /* SQLITE_OMIT_AUTOINCREMENT */

/* Opcode: MemIncr P1 P2 *
**
................................................................................
** by 6 spaces.  But the left-most 6 spaces have been removed to improve the
** readability.  From this point on down, the normal indentation rules are
** restored.
*****************************************************************************/
    }

    /* Make sure the stack limit was not exceeded */
    assert( pTos<=pStackLimit );

#ifdef VDBE_PROFILE
    {
      long long elapse = hwtime() - start;
      pOp->cycles += elapse;
      pOp->cnt++;
#if 0

**
** 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 1.678 2008/01/04 19:10:29 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
** The following global variable is incremented every time a cursor
................................................................................
    /* This is to check to make sure that the OPFLG_PUSH property
    ** is set correctly on all opcodes.
    */ 
    pStackLimit = pTos;
    if( sqlite3VdbeOpcodeHasProperty(pOp->opcode, OPFLG_PUSH) ){
      pStackLimit++;
    }
    assert( pTos>=&p->aStack[-1] && pTos<=pStackLimit );
#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
................................................................................
  }
  Release(pTos);
  pTos->u.i = v;
  pTos->flags = MEM_Int;
  break;
}

/* Opcode: MustBeInt P1 P2 P3
** 
** Force the top of the stack to be an integer.  If the top of the
** stack 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.
**
** If the top of the stack is not an integer and P2 is not zero and
** P1 is 1, then the stack is popped.  In all other cases, the depth
** of the stack is unchanged.
**
** If P3 is not zero, then act on the value in register P3 instead
** of using the stack.
*/
case OP_MustBeInt: {            /* no-push, jump */
  Mem *pMem = ((pOp->p3==0)?pTos:&p->aMem[pOp->p3]);
  assert( pOp->p3 || pTos>=p->aStack );
  assert( pOp->p3>=0 && pOp->p3<=p->nMem );
  applyAffinity(pMem, SQLITE_AFF_NUMERIC, encoding);
  if( (pMem->flags & MEM_Int)==0 ){
    if( pOp->p2==0 ){
      rc = SQLITE_MISMATCH;
      goto abort_due_to_error;
    }else if( pMem==pTos ){
      if( pOp->p1 ) popStack(&pTos, 1);
      pc = pOp->p2 - 1;
    }
  }else{
    Release(pMem);
    pMem->flags = MEM_Int;
  }
  break;
}

/* Opcode: RealAffinity P1 * *
**
** If register P1 holds an integer convert it to a real value.
................................................................................
  pTos++;
  pTos->u.i = p->apCsr[i]->seqCount++;
  pTos->flags = 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.
** The record number is not previously used as a key in the database
** table that cursor P1 points to.  The new record number is pushed 
** onto the stack if P3 is 0 or written to memory cell P3 otherwise.
**
** If P2>0 then P2 is a memory cell that holds the largest previously
** generated record number.  No new record numbers are allowed to be less
** than this value.  When this value reaches its maximum, a SQLITE_FULL
** error is generated.  The P2 memory cell is updated with the generated
** record number.  This P2 mechanism is used to help implement the
** AUTOINCREMENT feature.
................................................................................
        goto abort_due_to_error;
      }
    }
    pC->rowidIsValid = 0;
    pC->deferredMoveto = 0;
    pC->cacheStatus = CACHE_STALE;
  }
  if( pOp->p3 ){
    sqlite3VdbeMemSetInt64(&p->aMem[pOp->p3], v);
  }else{
    pTos++;
    pTos->u.i = v;
    pTos->flags = MEM_Int;
  }
  break;
}

/* Opcode: Insert P1 P2 P3 P4 P5
**
** Write an entry into the table of cursor P1.  A new entry is
** created if it doesn't already exist or the data for an existing
................................................................................
  assert( i>0 && i<=p->nMem );
  pTos++;
  sqlite3VdbeMemShallowCopy(pTos, &p->aMem[i], MEM_Ephem);
  break;
}

#ifndef SQLITE_OMIT_AUTOINCREMENT
/* Opcode: MemMax P1 P2 *
**
** Set the value of memory cell P1 to the maximum of its current value
** and the value in cell P2, or the value on the top of the stack if P2
** is zero. The stack is unchanged in either case.
**
** This instruction throws an error if the memory cell is not initially
** an integer.
*/
case OP_MemMax: {        /* no-push */
  int i = pOp->p1;
  Mem *pMem;
  Mem *pNew = (pOp->p2?(&p->aMem[pOp->p2]):pTos);
  assert( pOp->p2 || pTos>=p->aStack );
  assert( i>0 && i<=p->nMem );
  pMem = &p->aMem[i];
  sqlite3VdbeMemIntegerify(pMem);
  sqlite3VdbeMemIntegerify(pNew);
  if( pMem->u.i<pNew->u.i){
    pMem->u.i = pNew->u.i;
  }
  break;
}
#endif /* SQLITE_OMIT_AUTOINCREMENT */

/* Opcode: MemIncr P1 P2 *
**
................................................................................
** by 6 spaces.  But the left-most 6 spaces have been removed to improve the
** readability.  From this point on down, the normal indentation rules are
** restored.
*****************************************************************************/
    }

    /* Make sure the stack limit was not exceeded */
    assert( pTos>=&p->aStack[-1] && pTos<=pStackLimit );

#ifdef VDBE_PROFILE
    {
      long long elapse = hwtime() - start;
      pOp->cycles += elapse;
      pOp->cnt++;
#if 0

#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#*************************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this script is testing the AUTOINCREMENT features.
#
# $Id: autoinc.test,v 1.10 2007/10/09 08:29:32 danielk1977 Exp $
#

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

# If the library is not compiled with autoincrement support then
# skip all tests in this file.
................................................................................
  }
} {t1 1241}

ifcapable tempdb {
  do_test autoinc-2.52 {
    execsql {
      CREATE TEMP TABLE t2 AS SELECT y FROM t1;


      INSERT INTO t1 SELECT NULL, y+4 FROM t2;
      SELECT * FROM t1;
    }
  } {235 1 1235 2 1240 3 1241 4 1242 5 1243 6 1244 7 1245 8}
  do_test autoinc-2.53 {
    execsql {
      SELECT * FROM sqlite_sequence

#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#*************************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this script is testing the AUTOINCREMENT features.
#
# $Id: autoinc.test,v 1.11 2008/01/04 19:10:29 danielk1977 Exp $
#

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

# If the library is not compiled with autoincrement support then
# skip all tests in this file.
................................................................................
  }
} {t1 1241}

ifcapable tempdb {
  do_test autoinc-2.52 {
    execsql {
      CREATE TEMP TABLE t2 AS SELECT y FROM t1;
    }
    execsql {
      INSERT INTO t1 SELECT NULL, y+4 FROM t2;
      SELECT * FROM t1;
    }
  } {235 1 1235 2 1240 3 1241 4 1242 5 1243 6 1244 7 1245 8}
  do_test autoinc-2.53 {
    execsql {
      SELECT * FROM sqlite_sequence

#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements some common TCL routines used for regression
# testing the SQLite library
#
# $Id: tester.tcl,v 1.94 2007/10/23 14:49:59 drh Exp $


set tcl_precision 15
set sqlite_pending_byte 0x0010000

# 
# Check the command-line arguments for a default soft-heap-limit.
................................................................................
  return $r
}

# Do an VDBE code dump on the SQL given
#
proc explain {sql {db db}} {
  puts ""
  puts "addr  opcode        p1       p2     p3             "
  puts "----  ------------  ------  ------  ---------------"
  $db eval "explain $sql" {} {
    puts [format {%-4d  %-12.12s  %-6d  %-6d  %s} $addr $opcode $p1 $p2 $p3]


  }
}

# Another procedure to execute SQL.  This one includes the field
# names in the returned list.
#
proc execsql2 {sql} {

#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements some common TCL routines used for regression
# testing the SQLite library
#
# $Id: tester.tcl,v 1.95 2008/01/04 19:10:29 danielk1977 Exp $


set tcl_precision 15
set sqlite_pending_byte 0x0010000

# 
# Check the command-line arguments for a default soft-heap-limit.
................................................................................
  return $r
}

# Do an VDBE code dump on the SQL given
#
proc explain {sql {db db}} {
  puts ""
  puts "addr  opcode        p1      p2      p3      p4               p5  #"
  puts "----  ------------  ------  ------  ------  ---------------  --  -"
  $db eval "explain $sql" {} {
    puts [format {%-4d  %-12.12s  %-6d  %-6d  %-6d  % -17s %s  %s} \
      $addr $opcode $p1 $p2 $p3 $p4 $p5 $comment
    ]
  }
}

# Another procedure to execute SQL.  This one includes the field
# names in the returned list.
#
proc execsql2 {sql} {