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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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6
src/select.c
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@@ -12,7 +12,7 @@
** This file contains C code routines that are called by the parser
** to handle SELECT statements in SQLite.
**
** $Id: select.c,v 1.285 2006/01/05 14:22:34 danielk1977 Exp $
** $Id: select.c,v 1.286 2006/01/07 13:21:04 danielk1977 Exp $
*/
#include "sqliteInt.h"
@@ -2229,6 +2229,7 @@ static int simpleMinMaxQuery(Parse *pParse, Select *p, int eDest, int iParm){
iCol = pExpr->iColumn;
pTab = pSrc->a[0].pTab;
/* If we get to here, it means the query is of the correct form.
** Check to make sure we have an index and make pIdx point to the
** appropriate index. If the min() or max() is on an INTEGER PRIMARY
@@ -2266,11 +2267,12 @@ static int simpleMinMaxQuery(Parse *pParse, Select *p, int eDest, int iParm){
*/
iDb = sqlite3SchemaToIndex(pParse->db, pTab->pSchema);
sqlite3CodeVerifySchema(pParse, iDb);
sqlite3TableLock(pParse, iDb, pTab->tnum, 0, pTab->zName);
base = pSrc->a[0].iCursor;
brk = sqlite3VdbeMakeLabel(v);
computeLimitRegisters(pParse, p, brk);
if( pSrc->a[0].pSelect==0 ){
sqlite3OpenTableForReading(v, base, iDb, pTab);
sqlite3OpenTable(pParse, base, iDb, pTab, OP_OpenRead);
}
if( pIdx==0 ){
sqlite3VdbeAddOp(v, seekOp, base, 0);