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:-) (CVS 75)

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FossilOrigin-Name: c47d552e7e275dcc03a687e2a874e8e6e1eeb109
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drh
2000-06-08 00:19:02 +00:00
parent d8bc708652
commit 10e5e3cfde
3 changed files with 27 additions and 13 deletions
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26
src/select.c
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@@ -24,7 +24,7 @@
** This file contains C code routines that are called by the parser
** to handle SELECT statements.
**
** $Id: select.c,v 1.16 2000/06/07 23:51:50 drh Exp $
** $Id: select.c,v 1.17 2000/06/08 00:19:03 drh Exp $
*/
#include "sqliteInt.h"
@@ -429,9 +429,10 @@ Vdbe *sqliteGetVdbe(Parse *pParse){
** or intersection of two or more separate queries.
*/
static int multiSelect(Parse *pParse, Select *p, int eDest, int iParm){
int rc;
Select *pPrior;
Vdbe *v;
int rc; /* Success code from a subroutine */
Select *pPrior; /* Another SELECT immediately to our left */
Vdbe *v; /* Generate code to this VDBE */
int base; /* Baseline value for pParse->nTab */
/* Make sure there is no ORDER BY clause on prior SELECTs. Only the
** last SELECT in the series may have an ORDER BY.
@@ -452,6 +453,7 @@ static int multiSelect(Parse *pParse, Select *p, int eDest, int iParm){
/* Process the UNION or INTERSECTION
*/
base = pParse->nTab;
switch( p->op ){
case TK_ALL:
case TK_EXCEPT:
@@ -580,6 +582,7 @@ static int multiSelect(Parse *pParse, Select *p, int eDest, int iParm){
pParse->nErr++;
return 1;
}
pParse->nTab = base;
return 0;
}
@@ -626,6 +629,7 @@ int sqliteSelect(
Expr *pHaving; /* The HAVING clause. May be NULL */
int isDistinct; /* True if the DISTINCT keyword is present */
int distinct; /* Table to use for the distinct set */
int base; /* First cursor available for use */
/* If there is are a sequence of queries, do the earlier ones first.
*/
@@ -642,11 +646,16 @@ int sqliteSelect(
pHaving = p->pHaving;
isDistinct = p->isDistinct;
/* Save the current value of pParse->nTab. Restore this value before
** we exit.
*/
base = pParse->nTab;
/*
** Do not even attempt to generate any code if we have already seen
** errors before this routine starts.
*/
if( pParse->nErr>0 ) return 0;
if( pParse->nErr>0 ) return 1;
sqliteParseInfoReset(pParse);
/* Look up every table in the table list and create an appropriate
@@ -702,7 +711,11 @@ int sqliteSelect(
}
if( pHaving ) sqliteExprResolveInSelect(pParse, pHaving);
/* Resolve the field names and do a semantics check on all the expressions.
/* At this point, we should have allocated all the cursors that we
** need to handle subquerys and temporary tables. From here on we
** are committed to keeping the same value for pParse->nTab.
**
** Resolve the field names and do a semantics check on all the expressions.
*/
for(i=0; i<pEList->nExpr; i++){
if( sqliteExprResolveIds(pParse, pTabList, pEList->a[i].pExpr) ){
@@ -918,5 +931,6 @@ int sqliteSelect(
if( pOrderBy ){
generateSortTail(v, pEList->nExpr);
}
pParse->nTab = base;
return 0;
}