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Prevent ExecInsert() and ExecUpdate() from scribbling on the result tuple

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slot of the topmost plan node when a trigger returns a modified tuple.
These appear to be the only places where a plan node's caller did not
treat the result slot as read-only, which is an assumption that nodeUnique
makes as of 8.1.  Fixes trigger-vs-DISTINCT bug reported by Frank van Vugt.
This commit is contained in:
Tom Lane
2005-11-14 17:42:55 +00:00
parent 08ee64ebf5
commit 76ce39e386
3 changed files with 36 additions and 10 deletions
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4
src/backend/executor/execUtils.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/execUtils.c,v 1.126 2005/10/15 02:49:16 momjian Exp $
* $PostgreSQL: pgsql/src/backend/executor/execUtils.c,v 1.127 2005/11/14 17:42:54 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -187,6 +187,8 @@ CreateExecutorState(void)
estate->es_junkFilter = NULL;
estate->es_trig_tuple_slot = NULL;
estate->es_into_relation_descriptor = NULL;
estate->es_into_relation_use_wal = false;