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Cleanup of UNION ALL fix. Manual page updates.

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This commit is contained in:
Bruce Momjian
1997-12-29 01:13:37 +00:00
parent 4ce24c8aa9
commit a01b085c78
8 changed files with 304 additions and 286 deletions
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28
src/backend/parser/parse_clause.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_clause.c,v 1.3 1997/11/26 03:42:39 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_clause.c,v 1.4 1997/12/29 01:12:58 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -18,6 +18,7 @@
#include "postgres.h"
#include "access/heapam.h"
#include "catalog/pg_type.h"
#include "parser/analyze.h"
#include "parser/parse_clause.h"
#include "parser/parse_expr.h"
#include "parser/parse_node.h"
@ -371,3 +372,28 @@ transformSortClause(ParseState *pstate,
return sortlist;
}
/*
* transformUnionClause -
* transform a Union clause
*
*/
List *
transformUnionClause(List *unionClause, List *targetlist)
{
List *union_list = NIL;
QueryTreeList *qlist;
int i;
TargetEntry
if (unionClause)
{
qlist = parse_analyze(unionClause);
for (i=0; i < qlist->len; i++)
union_list = lappend(union_list, qlist->qtrees[i]);
/* we need to check return types are consistent here */
return union_list;
}
else
return NIL;
}