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SQLite now always chooses the column names for compound selects using

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the left-most select.  This makes SQLite work like other SQL database,
but it also is a change from historical behavior and may break some
scripts.  Ticket #1721. (CVS 3153)

FossilOrigin-Name: 80cda9f7ce83f2de6cd2fdaf6150bbc35b670fee
This commit is contained in:
drh
2006-03-26 01:21:22 +00:00
parent 229caa369a
commit 923782530b
8 changed files with 127 additions and 29 deletions
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11
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 1.309 2006/03/17 13:56:34 drh Exp $
** $Id: select.c,v 1.310 2006/03/26 01:21:23 drh Exp $
*/
#include "sqliteInt.h"
@@ -1047,6 +1047,7 @@ Table *sqlite3ResultSetOfSelect(Parse *pParse, char *zTabName, Select *pSelect){
ExprList *pEList;
Column *aCol, *pCol;
while( pSelect->pPrior ) pSelect = pSelect->pPrior;
if( prepSelectStmt(pParse, pSelect) ){
return 0;
}
@@ -1765,7 +1766,9 @@ static int multiSelect(
int iCont, iBreak, iStart;
assert( p->pEList );
if( eDest==SRT_Callback ){
generateColumnNames(pParse, 0, p->pEList);
Select *pFirst = p;
while( pFirst->pPrior ) pFirst = pFirst->pPrior;
generateColumnNames(pParse, 0, pFirst->pEList);
}
iBreak = sqlite3VdbeMakeLabel(v);
iCont = sqlite3VdbeMakeLabel(v);
@@ -1841,7 +1844,9 @@ static int multiSelect(
*/
assert( p->pEList );
if( eDest==SRT_Callback ){
generateColumnNames(pParse, 0, p->pEList);
Select *pFirst = p;
while( pFirst->pPrior ) pFirst = pFirst->pPrior;
generateColumnNames(pParse, 0, pFirst->pEList);
}
iBreak = sqlite3VdbeMakeLabel(v);
iCont = sqlite3VdbeMakeLabel(v);