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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2009-11-20 20:38:12 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2009-11-20 20:38:12 +0000 |
| commit | 7fc0f06221d22632daa3ff8b70919b43e8a242ca (patch) | |
| tree | a2ec73a6256c30ba9cb2d4723868978c5136ba5e /src/backend/executor/execUtils.c | |
| parent | 201a45c4fa23c485cf2e14ac9db8064b2c559fdc (diff) | |
| download | postgresql-7fc0f06221d22632daa3ff8b70919b43e8a242ca.tar.gz postgresql-7fc0f06221d22632daa3ff8b70919b43e8a242ca.zip | |
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.
Diffstat (limited to 'src/backend/executor/execUtils.c')
| -rw-r--r-- | src/backend/executor/execUtils.c | 3 |
1 files changed, 2 insertions, 1 deletions
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; |