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/nodes/copyfuncs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'src/backend/nodes/copyfuncs.c') diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c index b48909a3c5a..35656d86566 100644 --- a/src/backend/nodes/copyfuncs.c +++ b/src/backend/nodes/copyfuncs.c @@ -15,7 +15,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.451 2009/11/16 21:32:06 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.452 2009/11/20 20:38:10 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -3180,6 +3180,7 @@ _copyCreateTrigStmt(CreateTrigStmt *from) COPY_SCALAR_FIELD(row); COPY_SCALAR_FIELD(events); COPY_NODE_FIELD(columns); + COPY_NODE_FIELD(whenClause); COPY_SCALAR_FIELD(isconstraint); COPY_SCALAR_FIELD(deferrable); COPY_SCALAR_FIELD(initdeferred); -- cgit v1.2.3