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Yawn ... still another place not quite ready for zero-column tables.

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This commit is contained in:
Tom Lane 2004-05-11 22:43:55 +00:00
parent fda15b351a
commit 3a0d95d181
1 changed files with 15 additions and 5 deletions
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20
src/backend/optimizer/prep/prepunion.c
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@ -14,7 +14,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/prep/prepunion.c,v 1.109 2004/04/07 18:17:25 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/prep/prepunion.c,v 1.110 2004/05/11 22:43:55 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -264,8 +264,11 @@ generate_union_plan(SetOperationStmt *op, Query *parse,
List *sortList;
sortList = addAllTargetsToSortList(NULL, NIL, tlist, false);
plan = (Plan *) make_sort_from_sortclauses(parse, sortList, plan);
plan = (Plan *) make_unique(plan, sortList);
if (sortList)
{
plan = (Plan *) make_sort_from_sortclauses(parse, sortList, plan);
plan = (Plan *) make_unique(plan, sortList);
}
*sortClauses = sortList;
}
else
@ -324,6 +327,13 @@ generate_nonunion_plan(SetOperationStmt *op, Query *parse,
* correct output.
*/
sortList = addAllTargetsToSortList(NULL, NIL, tlist, false);
if (sortList == NIL) /* nothing to sort on? */
{
*sortClauses = NIL;
return plan;
}
plan = (Plan *) make_sort_from_sortclauses(parse, sortList, plan);
switch (op->op)
{
@ -519,9 +529,9 @@ generate_append_tlist(List *colTypes, bool flag,
* First extract typmods to use.
*
* If the inputs all agree on type and typmod of a particular column, use
* that typmod; else use -1.
* that typmod; else use -1. (+1 here in case of zero columns.)
*/
colTypmods = (int32 *) palloc(length(colTypes) * sizeof(int32));
colTypmods = (int32 *) palloc(length(colTypes) * sizeof(int32) + 1);
foreach(planl, input_plans)
{