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Overview
Comment:Added code to INSERT, DELETE and UPDATE virtual tables. The new code is mostly untested. (CVS 3248)
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1:32c97b884b104d120db3c0a87f5eab28f36851f8
User & Date: drh 2006-06-14 19:00:21
Context
2006-06-14
22:07
Bug fixes in the MATCH and ORDER BY processing of virtual tables. (CVS 3249) check-in: c996185a user: drh tags: trunk
19:00
Added code to INSERT, DELETE and UPDATE virtual tables. The new code is mostly untested. (CVS 3248) check-in: 32c97b88 user: drh tags: trunk
15:35
Better documentation on the limits of user-defined functions. And a marginally better error message when those limits are exceeded. Ticket #1847. (CVS 3247) check-in: 0d369ff0 user: drh tags: trunk
Changes
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Changes to src/build.c.

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**     CREATE INDEX
**     DROP INDEX
**     creating ID lists
**     BEGIN TRANSACTION
**     COMMIT
**     ROLLBACK
**
** $Id: build.c,v 1.399 2006/06/12 16:01:22 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** This routine is called when a new SQL statement is beginning to
** be parsed.  Initialize the pParse structure as needed.
................................................................................

  assert( pTable );

#ifndef SQLITE_OMIT_VIRTUALTABLE
  if( sqlite3VtabCallConnect(pParse, pTable) ){
    return SQLITE_ERROR;
  }
  if( pTable->isVirtual ) return 0;
#endif

#ifndef SQLITE_OMIT_VIEW
  /* A positive nCol means the columns names for this view are
  ** already known.
  */
  if( pTable->nCol>0 ) return 0;
................................................................................
    if( !isView ){
      destroyTable(pParse, pTab);
    }

    /* Remove the table entry from SQLite's internal schema and modify
    ** the schema cookie.
    */
#ifndef SQLITE_OMIT_VIRTUALTABLE
    if( pTab->isVirtual ){
      sqlite3VdbeOp3(v, OP_VDestroy, iDb, 0, pTab->zName, 0);
    }
#endif
    sqlite3VdbeOp3(v, OP_DropTable, iDb, 0, pTab->zName, 0);
    sqlite3ChangeCookie(db, v, iDb);
  }
  sqliteViewResetAll(db, iDb);

exit_drop_table:
  sqlite3SrcListDelete(pName);







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**     CREATE INDEX
**     DROP INDEX
**     creating ID lists
**     BEGIN TRANSACTION
**     COMMIT
**     ROLLBACK
**
** $Id: build.c,v 1.400 2006/06/14 19:00:21 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** This routine is called when a new SQL statement is beginning to
** be parsed.  Initialize the pParse structure as needed.
................................................................................

  assert( pTable );

#ifndef SQLITE_OMIT_VIRTUALTABLE
  if( sqlite3VtabCallConnect(pParse, pTable) ){
    return SQLITE_ERROR;
  }
  if( IsVirtual(pTable) ) return 0;
#endif

#ifndef SQLITE_OMIT_VIEW
  /* A positive nCol means the columns names for this view are
  ** already known.
  */
  if( pTable->nCol>0 ) return 0;
................................................................................
    if( !isView ){
      destroyTable(pParse, pTab);
    }

    /* Remove the table entry from SQLite's internal schema and modify
    ** the schema cookie.
    */

    if( IsVirtual(pTab) ){
      sqlite3VdbeOp3(v, OP_VDestroy, iDb, 0, pTab->zName, 0);
    }

    sqlite3VdbeOp3(v, OP_DropTable, iDb, 0, pTab->zName, 0);
    sqlite3ChangeCookie(db, v, iDb);
  }
  sqliteViewResetAll(db, iDb);

exit_drop_table:
  sqlite3SrcListDelete(pName);

Changes to src/delete.c.

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**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** in order to generate code for DELETE FROM statements.
**
** $Id: delete.c,v 1.123 2006/06/11 23:41:55 drh Exp $
*/
#include "sqliteInt.h"

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

/*
** Check to make sure the given table is writable.  If it is not
** writable, generate an error message and return 1.  If it is
** writable return 0;
*/
int sqlite3IsReadOnly(Parse *pParse, Table *pTab, int viewOk){
  if( pTab->readOnly && (pParse->db->flags & SQLITE_WriteSchema)==0
        && pParse->nested==0 ){




    sqlite3ErrorMsg(pParse, "table %s may not be modified", pTab->zName);
    return 1;
  }
#ifndef SQLITE_OMIT_VIEW
  if( !viewOk && pTab->pSelect ){
    sqlite3ErrorMsg(pParse,"cannot modify %s because it is a view",pTab->zName);
    return 1;
................................................................................
void sqlite3OpenTable(
  Parse *p,       /* Generate code into this VDBE */
  int iCur,       /* The cursor number of the table */
  int iDb,        /* The database index in sqlite3.aDb[] */
  Table *pTab,    /* The table to be opened */
  int opcode      /* OP_OpenRead or OP_OpenWrite */
){


  Vdbe *v = sqlite3GetVdbe(p);
  assert( opcode==OP_OpenWrite || opcode==OP_OpenRead );
  sqlite3TableLock(p, iDb, pTab->tnum, (opcode==OP_OpenWrite), pTab->zName);
  sqlite3VdbeAddOp(v, OP_Integer, iDb, 0);
  VdbeComment((v, "# %s", pTab->zName));
  sqlite3VdbeAddOp(v, opcode, iCur, pTab->tnum);
  sqlite3VdbeAddOp(v, OP_SetNumColumns, iCur, pTab->nCol);
}
................................................................................
    sqlite3VdbeAddOp(v, OP_Integer, 0, 0);
  }

  /* Special case: A DELETE without a WHERE clause deletes everything.
  ** It is easier just to erase the whole table.  Note, however, that
  ** this means that the row change count will be incorrect.
  */
  if( pWhere==0 && !triggers_exist ){
    if( db->flags & SQLITE_CountRows ){
      /* If counting rows deleted, just count the total number of
      ** entries in the table. */
      int endOfLoop = sqlite3VdbeMakeLabel(v);
      int addr2;
      if( !isView ){
        sqlite3OpenTable(pParse, iCur, iDb, pTab, OP_OpenRead);
................................................................................
    /* Begin the database scan
    */
    pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, 0);
    if( pWInfo==0 ) goto delete_from_cleanup;

    /* Remember the rowid of every item to be deleted.
    */
    sqlite3VdbeAddOp(v, OP_Rowid, iCur, 0);
    sqlite3VdbeAddOp(v, OP_FifoWrite, 0, 0);
    if( db->flags & SQLITE_CountRows ){
      sqlite3VdbeAddOp(v, OP_AddImm, 1, 0);
    }

    /* End the database scan loop.
    */
................................................................................
      /* This is the beginning of the delete loop when there are no
      ** row triggers */
      if( !triggers_exist ){ 
        addr = sqlite3VdbeAddOp(v, OP_FifoRead, 0, end);
      }

      /* Delete the row */






      sqlite3GenerateRowDelete(db, v, pTab, iCur, pParse->nested==0);

    }

    /* If there are row triggers, close all cursors then invoke
    ** the AFTER triggers
    */
    if( triggers_exist ){
      if( !isView ){
................................................................................
    }

    /* End of the delete loop */
    sqlite3VdbeAddOp(v, OP_Goto, 0, addr);
    sqlite3VdbeResolveLabel(v, end);

    /* Close the cursors after the loop if there are no row triggers */
    if( !triggers_exist ){
      for(i=1, pIdx=pTab->pIndex; pIdx; i++, pIdx=pIdx->pNext){
        sqlite3VdbeAddOp(v, OP_Close, iCur + i, pIdx->tnum);
      }
      sqlite3VdbeAddOp(v, OP_Close, iCur, 0);
    }
  }








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**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** in order to generate code for DELETE FROM statements.
**
** $Id: delete.c,v 1.124 2006/06/14 19:00:21 drh Exp $
*/
#include "sqliteInt.h"

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

/*
** Check to make sure the given table is writable.  If it is not
** writable, generate an error message and return 1.  If it is
** writable return 0;
*/
int sqlite3IsReadOnly(Parse *pParse, Table *pTab, int viewOk){
  if( (pTab->readOnly && (pParse->db->flags & SQLITE_WriteSchema)==0
        && pParse->nested==0) 
#ifndef SQLITE_OMIT_VIRTUALTABLE
      || (pTab->pModule && pTab->pModule->xUpdate==0)
#endif
  ){
    sqlite3ErrorMsg(pParse, "table %s may not be modified", pTab->zName);
    return 1;
  }
#ifndef SQLITE_OMIT_VIEW
  if( !viewOk && pTab->pSelect ){
    sqlite3ErrorMsg(pParse,"cannot modify %s because it is a view",pTab->zName);
    return 1;
................................................................................
void sqlite3OpenTable(
  Parse *p,       /* Generate code into this VDBE */
  int iCur,       /* The cursor number of the table */
  int iDb,        /* The database index in sqlite3.aDb[] */
  Table *pTab,    /* The table to be opened */
  int opcode      /* OP_OpenRead or OP_OpenWrite */
){
  Vdbe *v;
  if( IsVirtual(pTab) ) return;
  v = sqlite3GetVdbe(p);
  assert( opcode==OP_OpenWrite || opcode==OP_OpenRead );
  sqlite3TableLock(p, iDb, pTab->tnum, (opcode==OP_OpenWrite), pTab->zName);
  sqlite3VdbeAddOp(v, OP_Integer, iDb, 0);
  VdbeComment((v, "# %s", pTab->zName));
  sqlite3VdbeAddOp(v, opcode, iCur, pTab->tnum);
  sqlite3VdbeAddOp(v, OP_SetNumColumns, iCur, pTab->nCol);
}
................................................................................
    sqlite3VdbeAddOp(v, OP_Integer, 0, 0);
  }

  /* Special case: A DELETE without a WHERE clause deletes everything.
  ** It is easier just to erase the whole table.  Note, however, that
  ** this means that the row change count will be incorrect.
  */
  if( pWhere==0 && !triggers_exist && !IsVirtual(pTab) ){
    if( db->flags & SQLITE_CountRows ){
      /* If counting rows deleted, just count the total number of
      ** entries in the table. */
      int endOfLoop = sqlite3VdbeMakeLabel(v);
      int addr2;
      if( !isView ){
        sqlite3OpenTable(pParse, iCur, iDb, pTab, OP_OpenRead);
................................................................................
    /* Begin the database scan
    */
    pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, 0);
    if( pWInfo==0 ) goto delete_from_cleanup;

    /* Remember the rowid of every item to be deleted.
    */
    sqlite3VdbeAddOp(v, IsVirtual(pTab) ? OP_VRowid : OP_Rowid, iCur, 0);
    sqlite3VdbeAddOp(v, OP_FifoWrite, 0, 0);
    if( db->flags & SQLITE_CountRows ){
      sqlite3VdbeAddOp(v, OP_AddImm, 1, 0);
    }

    /* End the database scan loop.
    */
................................................................................
      /* This is the beginning of the delete loop when there are no
      ** row triggers */
      if( !triggers_exist ){ 
        addr = sqlite3VdbeAddOp(v, OP_FifoRead, 0, end);
      }

      /* Delete the row */
#ifndef SQLITE_OMIT_VIRTUALTABLE
      if( IsVirtual(pTab) ){
        sqlite3VdbeOp3(v, OP_VUpdate, 0, 1, (const char*)pTab->pVtab, P3_VTAB);
      }else
#endif
      {
        sqlite3GenerateRowDelete(db, v, pTab, iCur, pParse->nested==0);
      }
    }

    /* If there are row triggers, close all cursors then invoke
    ** the AFTER triggers
    */
    if( triggers_exist ){
      if( !isView ){
................................................................................
    }

    /* End of the delete loop */
    sqlite3VdbeAddOp(v, OP_Goto, 0, addr);
    sqlite3VdbeResolveLabel(v, end);

    /* Close the cursors after the loop if there are no row triggers */
    if( !triggers_exist && !IsVirtual(pTab) ){
      for(i=1, pIdx=pTab->pIndex; pIdx; i++, pIdx=pIdx->pNext){
        sqlite3VdbeAddOp(v, OP_Close, iCur + i, pIdx->tnum);
      }
      sqlite3VdbeAddOp(v, OP_Close, iCur, 0);
    }
  }

Changes to src/expr.c.

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**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains routines used for analyzing expressions and
** for generating VDBE code that evaluates expressions in SQLite.
**
** $Id: expr.c,v 1.261 2006/06/13 04:11:44 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** Return the 'affinity' of the expression pExpr if any.
**
................................................................................
      if( pExpr->iTable<0 ){
        /* This only happens when coding check constraints */
        assert( pParse->ckOffset>0 );
        sqlite3VdbeAddOp(v, OP_Dup, pParse->ckOffset-pExpr->iColumn-1, 1);
      }else if( pExpr->iColumn>=0 ){
        Table *pTab = pExpr->pTab;
        int iCol = pExpr->iColumn;
        int op = (pTab && pTab->isVirtual) ? OP_VColumn : OP_Column;
        sqlite3VdbeAddOp(v, op, pExpr->iTable, iCol);
        sqlite3ColumnDefault(v, pTab, iCol);
#ifndef SQLITE_OMIT_FLOATING_POINT
        if( pTab && pTab->aCol[iCol].affinity==SQLITE_AFF_REAL ){
          sqlite3VdbeAddOp(v, OP_RealAffinity, 0, 0);
        }
#endif
      }else{
        Table *pTab = pExpr->pTab;
        int op = (pTab && pTab->isVirtual) ? OP_VRowid : OP_Rowid;
        sqlite3VdbeAddOp(v, op, pExpr->iTable, 0);
      }
      break;
    }
    case TK_INTEGER: {
      codeInteger(v, (char*)pExpr->token.z, pExpr->token.n);
      break;







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**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains routines used for analyzing expressions and
** for generating VDBE code that evaluates expressions in SQLite.
**
** $Id: expr.c,v 1.262 2006/06/14 19:00:21 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** Return the 'affinity' of the expression pExpr if any.
**
................................................................................
      if( pExpr->iTable<0 ){
        /* This only happens when coding check constraints */
        assert( pParse->ckOffset>0 );
        sqlite3VdbeAddOp(v, OP_Dup, pParse->ckOffset-pExpr->iColumn-1, 1);
      }else if( pExpr->iColumn>=0 ){
        Table *pTab = pExpr->pTab;
        int iCol = pExpr->iColumn;
        int op = (pTab && IsVirtual(pTab)) ? OP_VColumn : OP_Column;
        sqlite3VdbeAddOp(v, op, pExpr->iTable, iCol);
        sqlite3ColumnDefault(v, pTab, iCol);
#ifndef SQLITE_OMIT_FLOATING_POINT
        if( pTab && pTab->aCol[iCol].affinity==SQLITE_AFF_REAL ){
          sqlite3VdbeAddOp(v, OP_RealAffinity, 0, 0);
        }
#endif
      }else{
        Table *pTab = pExpr->pTab;
        int op = (pTab && IsVirtual(pTab)) ? OP_VRowid : OP_Rowid;
        sqlite3VdbeAddOp(v, op, pExpr->iTable, 0);
      }
      break;
    }
    case TK_INTEGER: {
      codeInteger(v, (char*)pExpr->token.z, pExpr->token.n);
      break;

Changes to src/insert.c.

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**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle INSERT statements in SQLite.
**
** $Id: insert.c,v 1.165 2006/06/11 23:41:55 drh Exp $
*/
#include "sqliteInt.h"

/*
** Set P3 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:
................................................................................

  /* 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( keyColumn>=0 ){
      if( useTempTable ){
        sqlite3VdbeAddOp(v, OP_Column, srcTab, keyColumn);
      }else if( pSelect ){
        sqlite3VdbeAddOp(v, OP_Dup, nColumn - keyColumn - 1, 1);
      }else{
        sqlite3ExprCode(pParse, pList->a[keyColumn].pExpr);
................................................................................
      /* If the PRIMARY KEY expression is NULL, then use OP_NewRowid
      ** to generate a unique primary key value.
      */
      sqlite3VdbeAddOp(v, OP_NotNull, -1, sqlite3VdbeCurrentAddr(v)+3);
      sqlite3VdbeAddOp(v, OP_Pop, 1, 0);
      sqlite3VdbeAddOp(v, OP_NewRowid, base, counterMem);
      sqlite3VdbeAddOp(v, OP_MustBeInt, 0, 0);


    }else{
      sqlite3VdbeAddOp(v, OP_NewRowid, base, counterMem);
    }
#ifndef SQLITE_OMIT_AUTOINCREMENT
    if( pTab->autoInc ){
      sqlite3VdbeAddOp(v, OP_MemMax, counterMem, 0);
    }
................................................................................
        sqlite3ExprCode(pParse, pList->a[j].pExpr);
      }
    }

    /* Generate code to check constraints and generate index keys and
    ** do the insertion.
    */







    sqlite3GenerateConstraintChecks(pParse, pTab, base, 0, keyColumn>=0,
                                   0, onError, endOfLoop);
    sqlite3CompleteInsertion(pParse, pTab, base, 0,0,0,
                            (triggers_exist & TRIGGER_AFTER)!=0 ? newIdx : -1);

  }

  /* Update the count of rows that are inserted
  */
  if( (db->flags & SQLITE_CountRows)!=0 ){
    sqlite3VdbeAddOp(v, OP_MemIncr, 1, iCntMem);
  }
................................................................................
    sqlite3VdbeAddOp(v, OP_Close, srcTab, 0);
  }else if( pSelect ){
    sqlite3VdbeAddOp(v, OP_Pop, nColumn, 0);
    sqlite3VdbeAddOp(v, OP_Return, 0, 0);
    sqlite3VdbeResolveLabel(v, iCleanup);
  }

  if( !triggers_exist ){
    /* Close all tables opened */
    sqlite3VdbeAddOp(v, OP_Close, base, 0);
    for(idx=1, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, idx++){
      sqlite3VdbeAddOp(v, OP_Close, idx+base, 0);
    }
  }

................................................................................
void sqlite3OpenTableAndIndices(
  Parse *pParse,   /* Parsing context */
  Table *pTab,     /* Table to be opened */
  int base,        /* Cursor number assigned to the table */
  int op           /* OP_OpenRead or OP_OpenWrite */
){
  int i;
  int iDb = sqlite3SchemaToIndex(pParse->db, pTab->pSchema);
  Index *pIdx;




  Vdbe *v = sqlite3GetVdbe(pParse);
  assert( v!=0 );
  sqlite3OpenTable(pParse, base, iDb, pTab, op);
  for(i=1, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
    KeyInfo *pKey = sqlite3IndexKeyinfo(pParse, pIdx);
    assert( pIdx->pSchema==pTab->pSchema );
    sqlite3VdbeAddOp(v, OP_Integer, iDb, 0);
    VdbeComment((v, "# %s", pIdx->zName));
    sqlite3VdbeOp3(v, op, i+base, pIdx->tnum, (char*)pKey, P3_KEYINFO_HANDOFF);
  }
  if( pParse->nTab<=base+i ){
    pParse->nTab = base+i;
  }
}







|







 







>
>
>
>







 







>
>







 







>
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>







 







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8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
...
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
...
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
...
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
....
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
**    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 1.166 2006/06/14 19:00:21 drh Exp $
*/
#include "sqliteInt.h"

/*
** Set P3 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:
................................................................................

  /* 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 */
      sqlite3VdbeAddOp(v, OP_Null, 0, 0);
    }
    if( keyColumn>=0 ){
      if( useTempTable ){
        sqlite3VdbeAddOp(v, OP_Column, srcTab, keyColumn);
      }else if( pSelect ){
        sqlite3VdbeAddOp(v, OP_Dup, nColumn - keyColumn - 1, 1);
      }else{
        sqlite3ExprCode(pParse, pList->a[keyColumn].pExpr);
................................................................................
      /* If the PRIMARY KEY expression is NULL, then use OP_NewRowid
      ** to generate a unique primary key value.
      */
      sqlite3VdbeAddOp(v, OP_NotNull, -1, sqlite3VdbeCurrentAddr(v)+3);
      sqlite3VdbeAddOp(v, OP_Pop, 1, 0);
      sqlite3VdbeAddOp(v, OP_NewRowid, base, counterMem);
      sqlite3VdbeAddOp(v, OP_MustBeInt, 0, 0);
    }else if( IsVirtual(pTab) ){
      sqlite3VdbeAddOp(v, OP_Null, 0, 0);
    }else{
      sqlite3VdbeAddOp(v, OP_NewRowid, base, counterMem);
    }
#ifndef SQLITE_OMIT_AUTOINCREMENT
    if( pTab->autoInc ){
      sqlite3VdbeAddOp(v, OP_MemMax, counterMem, 0);
    }
................................................................................
        sqlite3ExprCode(pParse, pList->a[j].pExpr);
      }
    }

    /* Generate code to check constraints and generate index keys and
    ** do the insertion.
    */
#ifndef SQLITE_OMIT_VIRTUALTABLE
    if( IsVirtual(pTab) ){
      sqlite3VdbeOp3(v, OP_VUpdate, 0, pTab->nCol+1,
                     (const char*)pTab->pVtab, P3_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);
    }
  }

  /* Update the count of rows that are inserted
  */
  if( (db->flags & SQLITE_CountRows)!=0 ){
    sqlite3VdbeAddOp(v, OP_MemIncr, 1, iCntMem);
  }
................................................................................
    sqlite3VdbeAddOp(v, OP_Close, srcTab, 0);
  }else if( pSelect ){
    sqlite3VdbeAddOp(v, OP_Pop, nColumn, 0);
    sqlite3VdbeAddOp(v, OP_Return, 0, 0);
    sqlite3VdbeResolveLabel(v, iCleanup);
  }

  if( !triggers_exist && !IsVirtual(pTab) ){
    /* Close all tables opened */
    sqlite3VdbeAddOp(v, OP_Close, base, 0);
    for(idx=1, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, idx++){
      sqlite3VdbeAddOp(v, OP_Close, idx+base, 0);
    }
  }

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

  if( IsVirtual(pTab) ) return;
  iDb = sqlite3SchemaToIndex(pParse->db, pTab->pSchema);
  v = sqlite3GetVdbe(pParse);
  assert( v!=0 );
  sqlite3OpenTable(pParse, base, iDb, pTab, op);
  for(i=1, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
    KeyInfo *pKey = sqlite3IndexKeyinfo(pParse, pIdx);
    assert( pIdx->pSchema==pTab->pSchema );
    sqlite3VdbeAddOp(v, OP_Integer, iDb, 0);
    VdbeComment((v, "# %s", pIdx->zName));
    sqlite3VdbeOp3(v, op, i+base, pIdx->tnum, (char*)pKey, P3_KEYINFO_HANDOFF);
  }
  if( pParse->nTab<=base+i ){
    pParse->nTab = base+i;
  }
}

Changes to src/sqliteInt.h.

7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
...
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710

711
712
713
714
715
716











717
718
719
720
721
722
723
**    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 1.504 2006/06/13 15:36:07 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_

/*
** Extra interface definitions for those who need them
*/
................................................................................
  int tnum;        /* Root BTree node for this table (see note above) */
  Select *pSelect; /* NULL for tables.  Points to definition if a view. */
  u8 readOnly;     /* True if this table should not be written by the user */
  u8 isEphem;      /* True if created using OP_OpenEphermeral */
  u8 hasPrimKey;   /* True if there exists a primary key */
  u8 keyConf;      /* What to do in case of uniqueness conflict on iPKey */
  u8 autoInc;      /* True if the integer primary key is autoincrement */
  u8 isVirtual;    /* True if this is a virtual table */
  int nRef;          /* Number of pointers to this Table */
  Trigger *pTrigger; /* List of SQL triggers on this table */
  FKey *pFKey;       /* Linked list of all foreign keys in this table */
  char *zColAff;     /* String defining the affinity of each column */
#ifndef SQLITE_OMIT_CHECK
  Expr *pCheck;      /* The AND of all CHECK constraints */
#endif
#ifndef SQLITE_OMIT_ALTERTABLE
  int addColOffset;  /* Offset in CREATE TABLE statement to add a new column */
#endif
#ifndef SQLITE_OMIT_VIRTUALTABLE
  sqlite3_module *pModule;  /* Pointer to the implementation of the module */
  sqlite3_vtab *pVtab;      /* Pointer to the module instance */

  int nModuleArg;           /* Number of arguments to the module */
  char **azModuleArg;       /* Text of all module args. [0] is module name */
#endif
  Schema *pSchema;
};












/*
** Each foreign key constraint is an instance of the following structure.
**
** A foreign key is associated with two tables.  The "from" table is
** the table that contains the REFERENCES clause that creates the foreign
** key.  The "to" table is the table that is named in the REFERENCES clause.
** Consider this example:







|







 







<













>






>
>
>
>
>
>
>
>
>
>
>







7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
...
690
691
692
693
694
695
696

697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
**    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 1.505 2006/06/14 19:00:21 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_

/*
** Extra interface definitions for those who need them
*/
................................................................................
  int tnum;        /* Root BTree node for this table (see note above) */
  Select *pSelect; /* NULL for tables.  Points to definition if a view. */
  u8 readOnly;     /* True if this table should not be written by the user */
  u8 isEphem;      /* True if created using OP_OpenEphermeral */
  u8 hasPrimKey;   /* True if there exists a primary key */
  u8 keyConf;      /* What to do in case of uniqueness conflict on iPKey */
  u8 autoInc;      /* True if the integer primary key is autoincrement */

  int nRef;          /* Number of pointers to this Table */
  Trigger *pTrigger; /* List of SQL triggers on this table */
  FKey *pFKey;       /* Linked list of all foreign keys in this table */
  char *zColAff;     /* String defining the affinity of each column */
#ifndef SQLITE_OMIT_CHECK
  Expr *pCheck;      /* The AND of all CHECK constraints */
#endif
#ifndef SQLITE_OMIT_ALTERTABLE
  int addColOffset;  /* Offset in CREATE TABLE statement to add a new column */
#endif
#ifndef SQLITE_OMIT_VIRTUALTABLE
  sqlite3_module *pModule;  /* Pointer to the implementation of the module */
  sqlite3_vtab *pVtab;      /* Pointer to the module instance */
  u8 isVirtual;             /* True if this is a virtual table */
  int nModuleArg;           /* Number of arguments to the module */
  char **azModuleArg;       /* Text of all module args. [0] is module name */
#endif
  Schema *pSchema;
};

/*
** Test to see whether or not a table is a virtual table.  This is
** done as a macro so that it will be optimized out when virtual
** table support is omitted from the build.
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE
#  define IsVirtual(X) ((X)->isVirtual)
#else
#  define IsVirtual(X) 0
#endif

/*
** Each foreign key constraint is an instance of the following structure.
**
** A foreign key is associated with two tables.  The "from" table is
** the table that contains the REFERENCES clause that creates the foreign
** key.  The "to" table is the table that is named in the REFERENCES clause.
** Consider this example:

Changes to src/trigger.c.

99
100
101
102
103
104
105




106
107
108
109
110
111
112
...
590
591
592
593
594
595
596
597
598
599

600
601
602
603
604
605
606
    goto trigger_cleanup;
  }
  pTab = sqlite3SrcListLookup(pParse, pTableName);
  if( !pTab ){
    /* The table does not exist. */
    goto trigger_cleanup;
  }





  /* Check that the trigger name is not reserved and that no trigger of the
  ** specified name exists */
  zName = sqlite3NameFromToken(pName);
  if( !zName || SQLITE_OK!=sqlite3CheckObjectName(pParse, zName) ){
    goto trigger_cleanup;
  }
................................................................................
*/
int sqlite3TriggersExist(
  Parse *pParse,          /* Used to check for recursive triggers */
  Table *pTab,            /* The table the contains the triggers */
  int op,                 /* one of TK_DELETE, TK_INSERT, TK_UPDATE */
  ExprList *pChanges      /* Columns that change in an UPDATE statement */
){
  Trigger *pTrigger = pTab->pTrigger;
  int mask = 0;


  while( pTrigger ){
    if( pTrigger->op==op && checkColumnOverLap(pTrigger->pColumns, pChanges) ){
      mask |= pTrigger->tr_tm;
    }
    pTrigger = pTrigger->pNext;
  }
  return mask;







>
>
>
>







 







|


>







99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
...
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
    goto trigger_cleanup;
  }
  pTab = sqlite3SrcListLookup(pParse, pTableName);
  if( !pTab ){
    /* The table does not exist. */
    goto trigger_cleanup;
  }
  if( IsVirtual(pTab) ){
    sqlite3ErrorMsg(pParse, "cannot create triggers on virtual tables");
    goto trigger_cleanup;
  }

  /* Check that the trigger name is not reserved and that no trigger of the
  ** specified name exists */
  zName = sqlite3NameFromToken(pName);
  if( !zName || SQLITE_OK!=sqlite3CheckObjectName(pParse, zName) ){
    goto trigger_cleanup;
  }
................................................................................
*/
int sqlite3TriggersExist(
  Parse *pParse,          /* Used to check for recursive triggers */
  Table *pTab,            /* The table the contains the triggers */
  int op,                 /* one of TK_DELETE, TK_INSERT, TK_UPDATE */
  ExprList *pChanges      /* Columns that change in an UPDATE statement */
){
  Trigger *pTrigger;
  int mask = 0;

  pTrigger = IsVirtual(pTab) ? 0 : pTab->pTrigger;
  while( pTrigger ){
    if( pTrigger->op==op && checkColumnOverLap(pTrigger->pColumns, pChanges) ){
      mask |= pTrigger->tr_tm;
    }
    pTrigger = pTrigger->pNext;
  }
  return mask;

Changes to src/update.c.

8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
...
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
...
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
...
440
441
442
443
444
445
446




































447
448
449
450
451
452
453
...
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
**    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 1.124 2006/06/11 23:41:56 drh Exp $
*/
#include "sqliteInt.h"

/*
** The most recently coded instruction was an OP_Column to retrieve the
** i-th column of table pTab. This routine sets the P3 parameter of the 
** OP_Column to the default value, if any.
................................................................................
  }

  /* Begin the database scan
  */
  pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, 0);
  if( pWInfo==0 ) goto update_cleanup;

  /* Remember the index of every item to be updated.
  */
  sqlite3VdbeAddOp(v, OP_Rowid, iCur, 0);
  sqlite3VdbeAddOp(v, OP_FifoWrite, 0, 0);

  /* End the database scan loop.
  */
  sqlite3WhereEnd(pWInfo);

  /* Initialize the count of updated rows
................................................................................
    */
    if( sqlite3CodeRowTrigger(pParse, TK_UPDATE, pChanges, TRIGGER_BEFORE, pTab,
          newIdx, oldIdx, onError, addr) ){
      goto update_cleanup;
    }
  }

  if( !isView ){
    /* 
    ** Open every index that needs updating.  Note that if any
    ** index could potentially invoke a REPLACE conflict resolution 
    ** action, then we need to open all indices because we might need
    ** to be deleting some records.
    */
    sqlite3OpenTable(pParse, iCur, iDb, pTab, OP_OpenWrite); 
................................................................................
        assert( pParse->nTab>iCur+i+1 );
      }
    }

    /* Loop over every record that needs updating.  We have to load
    ** the old data for each record to be updated because some columns
    ** might not change and we will need to copy the old value.
    ** Also, the old data is needed to delete the old index entires.
    ** So make the cursor point at the old record.
    */
    if( !triggers_exist ){
      addr = sqlite3VdbeAddOp(v, OP_FifoRead, 0, 0);
      sqlite3VdbeAddOp(v, OP_Dup, 0, 0);
    }
    sqlite3VdbeAddOp(v, OP_NotExists, iCur, addr);
................................................................................
    }

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





































  /* Increment the row counter 
  */
  if( db->flags & SQLITE_CountRows && !pParse->trigStack){
    sqlite3VdbeAddOp(v, OP_AddImm, 1, 0);
  }

  /* If there are triggers, close all the cursors after each iteration
................................................................................
  /* Repeat the above with the next record to be updated, until
  ** all record selected by the WHERE clause have been updated.
  */
  sqlite3VdbeAddOp(v, OP_Goto, 0, addr);
  sqlite3VdbeJumpHere(v, addr);

  /* Close all tables if there were no FOR EACH ROW triggers */
  if( !triggers_exist ){
    for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
      if( openAll || aIdxUsed[i] ){
        sqlite3VdbeAddOp(v, OP_Close, iCur+i+1, 0);
      }
    }
    sqlite3VdbeAddOp(v, OP_Close, iCur, 0);
  }else{







|







 







|

|







 







|







 







|







 







>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
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>







 







|







8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
...
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
...
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
...
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
...
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
**    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 1.125 2006/06/14 19:00:22 drh Exp $
*/
#include "sqliteInt.h"

/*
** The most recently coded instruction was an OP_Column to retrieve the
** i-th column of table pTab. This routine sets the P3 parameter of the 
** OP_Column to the default value, if any.
................................................................................
  }

  /* Begin the database scan
  */
  pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, 0);
  if( pWInfo==0 ) goto update_cleanup;

  /* Remember the rowid of every item to be updated.
  */
  sqlite3VdbeAddOp(v, IsVirtual(pTab) ? OP_VRowid : OP_Rowid, iCur, 0);
  sqlite3VdbeAddOp(v, OP_FifoWrite, 0, 0);

  /* End the database scan loop.
  */
  sqlite3WhereEnd(pWInfo);

  /* Initialize the count of updated rows
................................................................................
    */
    if( sqlite3CodeRowTrigger(pParse, TK_UPDATE, pChanges, TRIGGER_BEFORE, pTab,
          newIdx, oldIdx, onError, addr) ){
      goto update_cleanup;
    }
  }

  if( !isView && !IsVirtual(pTab) ){
    /* 
    ** Open every index that needs updating.  Note that if any
    ** index could potentially invoke a REPLACE conflict resolution 
    ** action, then we need to open all indices because we might need
    ** to be deleting some records.
    */
    sqlite3OpenTable(pParse, iCur, iDb, pTab, OP_OpenWrite); 
................................................................................
        assert( pParse->nTab>iCur+i+1 );
      }
    }

    /* Loop over every record that needs updating.  We have to load
    ** the old data for each record to be updated because some columns
    ** might not change and we will need to copy the old value.
    ** Also, the old data is needed to delete the old index entries.
    ** So make the cursor point at the old record.
    */
    if( !triggers_exist ){
      addr = sqlite3VdbeAddOp(v, OP_FifoRead, 0, 0);
      sqlite3VdbeAddOp(v, OP_Dup, 0, 0);
    }
    sqlite3VdbeAddOp(v, OP_NotExists, iCur, addr);
................................................................................
    }

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

#ifndef SQLITE_OMIT_VIRTUALTABLE
  if( !isView && IsVirtual(pTab) ){
    addr = sqlite3VdbeAddOp(v, OP_FifoRead, 0, 0);

    /* If the record number will change, push the record number as it
    ** will be after the update. (The old record number is currently
    ** on top of the stack.)
    */
    if( chngRowid ){
      sqlite3ExprCode(pParse, pRowidExpr);
      sqlite3VdbeAddOp(v, OP_MustBeInt, 0, 0);
    }else{
      sqlite3VdbeAddOp(v, OP_Dup, 0, 0);
    }

    /* Compute new data for this record.  
    */
    for(i=0; i<pTab->nCol; i++){
      if( i==pTab->iPKey ){
        sqlite3VdbeAddOp(v, OP_Null, 0, 0);
        continue;
      }
      j = aXRef[i];
      if( j<0 ){
        sqlite3VdbeAddOp(v, OP_VNoChange, 0, 0);
      }else{
        sqlite3ExprCode(pParse, pChanges->a[j].pExpr);
      }
    }

    /* Make the update */
    sqlite3VdbeOp3(v, OP_VUpdate, 0, pTab->nCol+2, 
                      (const char*)pTab->pVtab, P3_VTAB);
  }
#endif /* SQLITE_OMIT_VIRTUAL */

  /* Increment the row counter 
  */
  if( db->flags & SQLITE_CountRows && !pParse->trigStack){
    sqlite3VdbeAddOp(v, OP_AddImm, 1, 0);
  }

  /* If there are triggers, close all the cursors after each iteration
................................................................................
  /* Repeat the above with the next record to be updated, until
  ** all record selected by the WHERE clause have been updated.
  */
  sqlite3VdbeAddOp(v, OP_Goto, 0, addr);
  sqlite3VdbeJumpHere(v, addr);

  /* Close all tables if there were no FOR EACH ROW triggers */
  if( !triggers_exist && !IsVirtual(pTab) ){
    for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
      if( openAll || aIdxUsed[i] ){
        sqlite3VdbeAddOp(v, OP_Close, iCur+i+1, 0);
      }
    }
    sqlite3VdbeAddOp(v, OP_Close, iCur, 0);
  }else{

Changes to src/vdbe.c.

39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
....
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
....
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
....
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
....
4751
4752
4753
4754
4755
4756
4757
















4758
4759
4760
4761
4762
4763
4764
4765
4766















4767
4768
4769
4770


4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783


4784
4785
4786
4787
4788
4789
4790
**
** 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 1.559 2006/06/14 13:03:24 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
................................................................................

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VCreate P1 * P3
**
** P3 is the name of a virtual table in database P1. Call the xCreate method
** for that table.
*/
case OP_VCreate: {
  rc = sqlite3VtabCallCreate(db, pOp->p1, pOp->p3, &p->zErrMsg);
  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VDestroy P1 * P3
**
** P3 is the name of a virtual table in database P1.  Call the xDestroy method
** of that table.
*/
case OP_VDestroy: {
  rc = sqlite3VtabCallDestroy(db, pOp->p1, pOp->p3);
  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VOpen P1 * P3
**
** P3 is a pointer to a virtual table object, an sqlite3_vtab structure.
** P1 is a cursor number.  This opcode opens a cursor to the virtual
** table and stores that cursor in P1.
*/
case OP_VOpen: {
  Cursor *pCur = 0;
  sqlite3_vtab_cursor *pVtabCursor = 0;

  sqlite3_vtab *pVtab = (sqlite3_vtab *)(pOp->p3);
  sqlite3_module *pModule = (sqlite3_module *)pVtab->pModule;

  assert(pVtab && pModule);
................................................................................
**
** The integer query plan parameter, argc, and all argv stack values 
** are popped from the stack before this instruction completes.
**
** A jump is made to P2 if the result set after filtering would be 
** empty.
*/
case OP_VFilter: {
  int nArg;

  const sqlite3_module *pModule;

  Cursor *pCur = p->apCsr[pOp->p1];
  assert( pCur->pVtabCursor );
  pModule = pCur->pVtabCursor->pVtab->pModule;
................................................................................
#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VNext P1 P2 *
**
** Advance virtual table P1 to the next row in its result set and
** jump to instruction P2.  Or, if the virtual table has reached
** the end of its result set, then fall through to the next instruction.
*/
case OP_VNext: {
  const sqlite3_module *pModule;
  int res = 0;

  Cursor *pCur = p->apCsr[pOp->p1];
  assert( pCur->pVtabCursor );
  pModule = pCur->pVtabCursor->pVtab->pModule;
  if( pModule->xNext==0 ){
................................................................................
      pc = pOp->p2 - 1;
    }
  }

  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

















#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VUpdate * P2 P3
**
** P3 is a pointer to a virtual table object, an sqlite3_vtab structure.
** This opcode invokes the corresponding xUpdate method. P2 values
** are taken from the stack to pass to the xUpdate invocation. The
** value on the top of the stack corresponds to the p2th element 
** of the argv array passed to xUpdate.















*/
case OP_VUpdate: {
  sqlite3_vtab *pVtab = (sqlite3_vtab *)(pOp->p3);
  sqlite3_module *pModule = (sqlite3_module *)pVtab->pModule;


  if( pModule->xUpdate==0 ){
    sqlite3SetString(&p->zErrMsg, "Unsupported module operation: xUpdate", 0);
    rc = SQLITE_ERROR;
  }else{
    int i;
    Mem **apArg = p->apArg;
    int nArg = pOp->p1;
    for(i = 0; i<nArg; i++){
      apArg[i] = &pTos[i+1-nArg];
      storeTypeInfo(apArg[i], 0);
    }
    rc = pModule->xUpdate(pVtab, nArg, apArg);
  }


}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

/* An other opcode is illegal...
*/
default: {
  assert( 0 );







|







 







|











|












|







 







|







 







|







 







>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>









>
>
>
>
>
>
>
>
>
>
>
>
>
>
>

|


>
>

|




|
|
|
<



>
>







39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
....
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
....
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
....
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
....
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812

4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
**
** 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 1.560 2006/06/14 19:00:22 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
................................................................................

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VCreate P1 * P3
**
** P3 is the name of a virtual table in database P1. Call the xCreate method
** for that table.
*/
case OP_VCreate: {   /* no-push */
  rc = sqlite3VtabCallCreate(db, pOp->p1, pOp->p3, &p->zErrMsg);
  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VDestroy P1 * P3
**
** P3 is the name of a virtual table in database P1.  Call the xDestroy method
** of that table.
*/
case OP_VDestroy: {   /* no-push */
  rc = sqlite3VtabCallDestroy(db, pOp->p1, pOp->p3);
  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VOpen P1 * P3
**
** P3 is a pointer to a virtual table object, an sqlite3_vtab structure.
** P1 is a cursor number.  This opcode opens a cursor to the virtual
** table and stores that cursor in P1.
*/
case OP_VOpen: {   /* no-push */
  Cursor *pCur = 0;
  sqlite3_vtab_cursor *pVtabCursor = 0;

  sqlite3_vtab *pVtab = (sqlite3_vtab *)(pOp->p3);
  sqlite3_module *pModule = (sqlite3_module *)pVtab->pModule;

  assert(pVtab && pModule);
................................................................................
**
** The integer query plan parameter, argc, and all argv stack values 
** are popped from the stack before this instruction completes.
**
** A jump is made to P2 if the result set after filtering would be 
** empty.
*/
case OP_VFilter: {   /* no-push */
  int nArg;

  const sqlite3_module *pModule;

  Cursor *pCur = p->apCsr[pOp->p1];
  assert( pCur->pVtabCursor );
  pModule = pCur->pVtabCursor->pVtab->pModule;
................................................................................
#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VNext P1 P2 *
**
** Advance virtual table P1 to the next row in its result set and
** jump to instruction P2.  Or, if the virtual table has reached
** the end of its result set, then fall through to the next instruction.
*/
case OP_VNext: {   /* no-push */
  const sqlite3_module *pModule;
  int res = 0;

  Cursor *pCur = p->apCsr[pOp->p1];
  assert( pCur->pVtabCursor );
  pModule = pCur->pVtabCursor->pVtab->pModule;
  if( pModule->xNext==0 ){
................................................................................
      pc = pOp->p2 - 1;
    }
  }

  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */


#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VNoChange * * *
**
** Push an entry onto the stack which says to the VUpdate command
** that the corresponding column of the row should not be modified.
*/
case OP_VNoChange: {
  pTos++;
  pTos->flags = 0;
  pTos->n = 0;
  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */


#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VUpdate * P2 P3
**
** P3 is a pointer to a virtual table object, an sqlite3_vtab structure.
** This opcode invokes the corresponding xUpdate method. P2 values
** are taken from the stack to pass to the xUpdate invocation. The
** value on the top of the stack corresponds to the p2th element 
** of the argv array passed to xUpdate.
**
** The xUpdate method will do a DELETE or an INSERT or both.
** The argv[0] element (which corresponds to the P2-th element down
** on the stack) is the rowid of a row to delete.  If argv[0] is
** NULL then no deletion occurs.  The argv[1] element is the rowid
** of the new row.  This can be NULL to have the virtual table
** select the new rowid for itself.  The higher elements in the
** stack are the values of columns in the new row.  if any argv[i]
** where i>=2 is a NULL pointer (that is to say if argv[i]==NULL 
** which is different from if sqlite3_value_type(argv[i])==SQLITE_NULL)
** that means to preserve a copy of that element.  In other words,
** copy the corresponding value from the argv[0] row into the new row.
**
** If P2==1 then no insert is performed.  argv[0] is the rowid of
** a row to delete.
*/
case OP_VUpdate: {   /* no-push */
  sqlite3_vtab *pVtab = (sqlite3_vtab *)(pOp->p3);
  sqlite3_module *pModule = (sqlite3_module *)pVtab->pModule;
  int nArg = pOp->p2;
  assert( pOp->p3type==P3_VTAB );
  if( pModule->xUpdate==0 ){
    sqlite3SetString(&p->zErrMsg, "read-only table", 0);
    rc = SQLITE_ERROR;
  }else{
    int i;
    Mem **apArg = p->apArg;
    Mem *pX = &pTos[1-nArg];
    for(i = 0; i<nArg; i++, pX++){
      apArg[i] = pX->flags ? storeTypeInfo(pX,0), pX : 0;

    }
    rc = pModule->xUpdate(pVtab, nArg, apArg);
  }
  popStack(&pTos, nArg);
  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

/* An other opcode is illegal...
*/
default: {
  assert( 0 );

Changes to src/where.c.

12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
....
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
** This module contains C code that generates VDBE code used to process
** the WHERE clause of SQL statements.  This module is reponsible for
** generating the code that loops through a table looking for applicable
** rows.  Indices are selected and used to speed the search when doing
** so is applicable.  Because this module is responsible for selecting
** indices, you might also think of this module as the "query optimizer".
**
** $Id: where.c,v 1.216 2006/06/13 23:51:35 drh Exp $
*/
#include "sqliteInt.h"

/*
** The number of bits in a Bitmask.  "BMS" means "BitMask Size".
*/
#define BMS  (sizeof(Bitmask)*8)
................................................................................
      m = getMask(&maskSet, pTabItem->iCursor);
      if( (m & notReady)==0 ){
        if( j==iFrom ) iFrom++;
        continue;
      }
      assert( pTabItem->pTab );
#ifndef SQLITE_OMIT_VIRTUALTABLE
      if( pTabItem->pTab->isVirtual ){
        cost = bestVirtualIndex(pParse, &wc, pTabItem, notReady,
                                ppOrderBy ? *ppOrderBy : 0, i==0,
                                &pLevel->pIdxInfo);
        flags = WHERE_VIRTUALTABLE;
        pIdx = 0;
        nEq = 0;
      }else 







|







 







|







12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
....
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
** This module contains C code that generates VDBE code used to process
** the WHERE clause of SQL statements.  This module is reponsible for
** generating the code that loops through a table looking for applicable
** rows.  Indices are selected and used to speed the search when doing
** so is applicable.  Because this module is responsible for selecting
** indices, you might also think of this module as the "query optimizer".
**
** $Id: where.c,v 1.217 2006/06/14 19:00:22 drh Exp $
*/
#include "sqliteInt.h"

/*
** The number of bits in a Bitmask.  "BMS" means "BitMask Size".
*/
#define BMS  (sizeof(Bitmask)*8)
................................................................................
      m = getMask(&maskSet, pTabItem->iCursor);
      if( (m & notReady)==0 ){
        if( j==iFrom ) iFrom++;
        continue;
      }
      assert( pTabItem->pTab );
#ifndef SQLITE_OMIT_VIRTUALTABLE
      if( IsVirtual(pTabItem->pTab) ){
        cost = bestVirtualIndex(pParse, &wc, pTabItem, notReady,
                                ppOrderBy ? *ppOrderBy : 0, i==0,
                                &pLevel->pIdxInfo);
        flags = WHERE_VIRTUALTABLE;
        pIdx = 0;
        nEq = 0;
      }else