From 7fc0f06221d22632daa3ff8b70919b43e8a242ca Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Fri, 20 Nov 2009 20:38:12 +0000 Subject: Add a WHEN clause to CREATE TRIGGER, allowing a boolean expression to be checked to determine whether the trigger should be fired. For BEFORE triggers this is mostly a matter of spec compliance; but for AFTER triggers it can provide a noticeable performance improvement, since queuing of a deferred trigger event and re-fetching of the row(s) at end of statement can be short-circuited if the trigger does not need to be fired. Takahiro Itagaki, reviewed by KaiGai Kohei. --- src/backend/executor/execUtils.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'src/backend/executor/execUtils.c') diff --git a/src/backend/executor/execUtils.c b/src/backend/executor/execUtils.c index d3352f1f5d4..e1aa8ce8ac9 100644 --- a/src/backend/executor/execUtils.c +++ b/src/backend/executor/execUtils.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/executor/execUtils.c,v 1.165 2009/10/26 02:26:29 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/executor/execUtils.c,v 1.166 2009/11/20 20:38:10 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -117,6 +117,7 @@ CreateExecutorState(void) estate->es_trig_target_relations = NIL; estate->es_trig_tuple_slot = NULL; + estate->es_trig_oldtup_slot = NULL; estate->es_param_list_info = NULL; estate->es_param_exec_vals = NULL; -- cgit v1.2.3