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Modifications to the VDBE to support more than one database file. (CVS 878)

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FossilOrigin-Name: 875da9eed981bfa27b98e95025f9fdbed74b4098
This commit is contained in:
drh
2003-03-19 03:14:00 +00:00
parent 9468c7f489
commit 001bbcbb8f
19 changed files with 451 additions and 266 deletions
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19
src/delete.c
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@@ -12,7 +12,7 @@
** This file contains C code routines that are called by the parser
** to handle DELETE FROM statements.
**
** $Id: delete.c,v 1.45 2003/01/13 23:27:33 drh Exp $
** $Id: delete.c,v 1.46 2003/03/19 03:14:01 drh Exp $
*/
#include "sqliteInt.h"
@@ -83,7 +83,6 @@ void sqliteDeleteFrom(
Index *pIdx; /* For looping over indices of the table */
int base; /* Index of the first available table cursor */
sqlite *db; /* Main database structure */
int openOp; /* Opcode used to open a cursor to the table */
int row_triggers_exist = 0;
int oldIdx = -1;
@@ -173,8 +172,8 @@ void sqliteDeleteFrom(
** entries in the table. */
int endOfLoop = sqliteVdbeMakeLabel(v);
int addr;
openOp = pTab->isTemp ? OP_OpenAux : OP_Open;
sqliteVdbeAddOp(v, openOp, base, pTab->tnum);
sqliteVdbeAddOp(v, OP_Integer, pTab->isTemp, 0);
sqliteVdbeAddOp(v, OP_OpenRead, base, pTab->tnum);
sqliteVdbeAddOp(v, OP_Rewind, base, sqliteVdbeCurrentAddr(v)+2);
addr = sqliteVdbeAddOp(v, OP_AddImm, 1, 0);
sqliteVdbeAddOp(v, OP_Next, base, addr);
@@ -220,9 +219,8 @@ void sqliteDeleteFrom(
if( row_triggers_exist ){
addr = sqliteVdbeAddOp(v, OP_ListRead, 0, end);
sqliteVdbeAddOp(v, OP_Dup, 0, 0);
openOp = pTab->isTemp ? OP_OpenAux : OP_Open;
sqliteVdbeAddOp(v, openOp, base, pTab->tnum);
sqliteVdbeAddOp(v, OP_Integer, pTab->isTemp, 0);
sqliteVdbeAddOp(v, OP_OpenRead, base, pTab->tnum);
sqliteVdbeAddOp(v, OP_MoveTo, base, 0);
sqliteVdbeAddOp(v, OP_OpenTemp, oldIdx, 0);
@@ -251,10 +249,11 @@ void sqliteDeleteFrom(
** cursors are opened only once on the outside the loop.
*/
pParse->nTab = base + 1;
openOp = pTab->isTemp ? OP_OpenWrAux : OP_OpenWrite;
sqliteVdbeAddOp(v, openOp, base, pTab->tnum);
sqliteVdbeAddOp(v, OP_Integer, pTab->isTemp, 0);
sqliteVdbeAddOp(v, OP_OpenWrite, base, pTab->tnum);
for(i=1, pIdx=pTab->pIndex; pIdx; i++, pIdx=pIdx->pNext){
sqliteVdbeAddOp(v, openOp, pParse->nTab++, pIdx->tnum);
sqliteVdbeAddOp(v, OP_Integer, pTab->isTemp, 0);
sqliteVdbeAddOp(v, OP_OpenWrite, pParse->nTab++, pIdx->tnum);
}
/* This is the beginning of the delete loop when there are no