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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/nodes/equalfuncs.c | |
| parent | 201a45c4fa23c485cf2e14ac9db8064b2c559fdc (diff) | |
| download | postgresql-7fc0f06221d22632daa3ff8b70919b43e8a242ca.tar.gz | |
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/nodes/equalfuncs.c')
| -rw-r--r-- | src/backend/nodes/equalfuncs.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/backend/nodes/equalfuncs.c b/src/backend/nodes/equalfuncs.c index c69468ae7a..eeda5799ee 100644 --- a/src/backend/nodes/equalfuncs.c +++ b/src/backend/nodes/equalfuncs.c @@ -22,7 +22,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.373 2009/11/16 21:32:06 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.374 2009/11/20 20:38:10 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -1670,6 +1670,7 @@ _equalCreateTrigStmt(CreateTrigStmt *a, CreateTrigStmt *b) COMPARE_SCALAR_FIELD(row); COMPARE_SCALAR_FIELD(events); COMPARE_NODE_FIELD(columns); + COMPARE_NODE_FIELD(whenClause); COMPARE_SCALAR_FIELD(isconstraint); COMPARE_SCALAR_FIELD(deferrable); COMPARE_SCALAR_FIELD(initdeferred); |