* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/optimizer/plan/subselect.c,v 1.122 2007/02/27 01:11:25 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/optimizer/plan/subselect.c,v 1.123 2007/07/18 21:40:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
Param *prm;
/*
- * Set up for a new level of subquery. This is just to keep
- * SS_finalize_plan from becoming confused; we don't bother with making
- * a whole new PlannerInfo struct.
+ * We must run SS_finalize_plan(), since that's normally done before a
+ * subplan gets put into the initplan list. However it will try to attach
+ * any pre-existing initplans to this one, which we don't want (they are
+ * siblings not children of this initplan). So, a quick kluge to hide
+ * them. (This is something else that could perhaps be cleaner if we did
+ * extParam/allParam processing in setrefs.c instead of here? See notes
+ * for materialize_finished_plan.)
*/
- root->query_level++;
saved_init_plans = root->init_plans;
root->init_plans = NIL;
*/
SS_finalize_plan(root, plan);
- /* Return to outer subquery context */
- root->query_level--;
+ /* Restore outer initplan list */
root->init_plans = saved_init_plans;
/*
-2147483647 | 0
(5 rows)
+--
+-- Test cases involving PARAM_EXEC parameters and min/max index optimizations.
+-- Per bug report from David Sanchez i Gregori.
+--
+select * from (
+ select max(unique1) from tenk1 as a
+ where exists (select 1 from tenk1 as b where b.thousand = a.unique2)
+) ss;
+ max
+------
+ 9997
+(1 row)
+
+select * from (
+ select min(unique1) from tenk1 as a
+ where not exists (select 1 from tenk1 as b where b.unique2 = 10000)
+) ss;
+ min
+-----
+ 0
+(1 row)
+
select f1, ss1 as relabel from
(select *, (select sum(f1) from int4_tbl b where f1 >= a.f1) as ss1
from int4_tbl a) ss;
+
+--
+-- Test cases involving PARAM_EXEC parameters and min/max index optimizations.
+-- Per bug report from David Sanchez i Gregori.
+--
+
+select * from (
+ select max(unique1) from tenk1 as a
+ where exists (select 1 from tenk1 as b where b.thousand = a.unique2)
+) ss;
+
+select * from (
+ select min(unique1) from tenk1 as a
+ where not exists (select 1 from tenk1 as b where b.unique2 = 10000)
+) ss;