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ActiveSnapshot must be set to something valid while running deferred

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triggers during COMMIT.  Per trouble report from Frank van Vugt.
This commit is contained in:
Tom Lane 2004-12-06 23:57:17 +00:00
parent e514da649e
commit d5df606cb2
1 changed files with 9 additions and 1 deletions
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10
src/backend/commands/trigger.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California * Portions Copyright (c) 1994, Regents of the University of California
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/trigger.c,v 1.175 2004/11/14 02:04:14 neilc Exp $ * $PostgreSQL: pgsql/src/backend/commands/trigger.c,v 1.176 2004/12/06 23:57:17 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -2364,6 +2364,14 @@ AfterTriggerEndXact(void)
/* ... but not inside a query */ /* ... but not inside a query */
Assert(afterTriggers->query_depth == -1); Assert(afterTriggers->query_depth == -1);
/*
* If there are any triggers to fire, make sure we have set a snapshot
* for them to use. (Since PortalRunUtility doesn't set a snap for
* COMMIT, we can't assume ActiveSnapshot is valid on entry.)
*/
if (afterTriggers->events.head != NULL)
ActiveSnapshot = CopySnapshot(GetTransactionSnapshot());
/* /*
* Run all the remaining triggers. Loop until they are all gone, * Run all the remaining triggers. Loop until they are all gone,
* just in case some trigger queues more for us to do. * just in case some trigger queues more for us to do.