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Fix a couple of snapshot management bugs in the new ResourceOwner world:

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non-writable large objects need to have their snapshots registered on the
transaction resowner, not the current portal's, because it must persist until
the large object is closed (which the portal does not).  Also, ensure that the
serializable snapshot is recorded by the transaction resource owner too, even
when a subtransaction has changed the current resource owner before
serializable is taken.

Per bug reports from Pavan Deolasee.
This commit is contained in:
Alvaro Herrera
2008-12-04 14:51:02 +00:00
parent 30c52532d2
commit 7b640b0345
7 changed files with 101 additions and 19 deletions
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8
src/backend/access/transam/xact.c
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.269 2008/11/19 10:34:50 heikki Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.270 2008/12/04 14:51:02 alvherre Exp $
*
*-------------------------------------------------------------------------
*/
@ -1667,6 +1667,9 @@ CommitTransaction(void)
/* Clean up the relation cache */
AtEOXact_RelationCache(true);
/* Clean up the snapshot manager */
AtEarlyCommit_Snapshot();
/*
* Make catalog changes visible to all backends. This has to happen after
* relcache references are dropped (see comments for
@ -1906,6 +1909,9 @@ PrepareTransaction(void)
/* Clean up the relation cache */
AtEOXact_RelationCache(true);
/* Clean up the snapshot manager */
AtEarlyCommit_Snapshot();
/* notify and flatfiles don't need a postprepare call */
PostPrepare_PgStat();