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Implementation of UNIONs.

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This commit is contained in:
Bruce Momjian
1997-12-24 06:06:58 +00:00
parent 18adbd9aed
commit 6231e161c9
7 changed files with 95 additions and 91 deletions
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20
src/backend/optimizer/plan/planner.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.15 1997/12/22 05:42:08 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.16 1997/12/24 06:06:01 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -81,11 +81,19 @@ planner(Query *parse)
int rt_index;
/*
* plan inheritance
*/
rt_index = first_matching_rt_entry(rangetable, INHERITS_FLAG);
if (rt_index != -1)
if (parse->unionClause)
{
result_plan = (Plan *) plan_union_queries(0, /* none */
parse,
UNION_FLAG);
/* XXX do we need to do this? bjm 12/19/97 */
tlist = preprocess_targetlist(tlist,
parse->commandType,
parse->resultRelation,
parse->rtable);
}
else if ((rt_index =
first_matching_rt_entry(rangetable, INHERITS_FLAG)) != -1)
{
result_plan = (Plan *) plan_union_queries((Index) rt_index,
parse,