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Make sure targetlist generated for subplan does not share

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nodes with HAVING qualifier of upper plan.  Have not seen any failures,
just being a little bit paranoid...
This commit is contained in:
Tom Lane 1999-05-04 00:00:20 +00:00
parent b6c732e63c
commit 5da466c597
1 changed files with 7 additions and 2 deletions
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9
src/backend/optimizer/plan/planner.c
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@ -7,7 +7,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.48 1999/05/03 00:38:43 tgl Exp $ * $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.49 1999/05/04 00:00:20 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -505,8 +505,13 @@ make_subplanTargetList(Query *parse,
if (tlist_member(v, sub_tlist) == NULL) if (tlist_member(v, sub_tlist) == NULL)
{ {
/* Make sure sub_tlist element is a fresh object not shared with
* any other structure; not sure if anything will break if it is
* shared, but better to be safe...
*/
sub_tlist = lappend(sub_tlist, sub_tlist = lappend(sub_tlist,
create_tl_element(v, next_resno)); create_tl_element((Var *) copyObject(v),
next_resno));
next_resno++; next_resno++;
} }
} }