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In shared-cache mode, lock all required tables before beginning to execute the body of the statement program. (CVS 2881)

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FossilOrigin-Name: 23b587b05b89727248805e6d9e5141e018cf2152
This commit is contained in:
danielk1977
2006-01-07 13:21:04 +00:00
parent 8c0ca7d27c
commit c00da10565
16 changed files with 310 additions and 96 deletions
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18
src/delete.c
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@@ -12,7 +12,7 @@
** 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 1.114 2006/01/05 11:34:34 danielk1977 Exp $
** $Id: delete.c,v 1.115 2006/01/07 13:21:04 danielk1977 Exp $
*/
#include "sqliteInt.h"
@@ -59,15 +59,19 @@ int sqlite3IsReadOnly(Parse *pParse, Table *pTab, int viewOk){
/*
** Generate code that will open a table for reading.
*/
void sqlite3OpenTableForReading(
Vdbe *v, /* Generate code into this VDBE */
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 */
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, OP_OpenRead, iCur, pTab->tnum);
sqlite3VdbeAddOp(v, opcode, iCur, pTab->tnum);
sqlite3VdbeAddOp(v, OP_SetNumColumns, iCur, pTab->nCol);
}
@@ -208,7 +212,7 @@ void sqlite3DeleteFrom(
int endOfLoop = sqlite3VdbeMakeLabel(v);
int addr;
if( !isView ){
sqlite3OpenTableForReading(v, iCur, iDb, pTab);
sqlite3OpenTable(pParse, iCur, iDb, pTab, OP_OpenRead);
}
sqlite3VdbeAddOp(v, OP_Rewind, iCur, sqlite3VdbeCurrentAddr(v)+2);
addr = sqlite3VdbeAddOp(v, OP_AddImm, 1, 0);
@@ -276,7 +280,7 @@ void sqlite3DeleteFrom(
addr = sqlite3VdbeAddOp(v, OP_FifoRead, 0, end);
if( !isView ){
sqlite3VdbeAddOp(v, OP_Dup, 0, 0);
sqlite3OpenTableForReading(v, iCur, iDb, pTab);
sqlite3OpenTable(pParse, iCur, iDb, pTab, OP_OpenRead);
}
sqlite3VdbeAddOp(v, OP_MoveGe, iCur, 0);
sqlite3VdbeAddOp(v, OP_Rowid, iCur, 0);