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Fix for COPY-after-truncate feature.

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Simon Riggs
This commit is contained in:
Bruce Momjian
2007-03-03 20:08:41 +00:00
parent ae35867a39
commit 63c678d17b
3 changed files with 28 additions and 9 deletions
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30
src/backend/utils/cache/relcache.c vendored
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.256 2007/02/27 23:48:09 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.257 2007/03/03 20:08:41 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -1915,9 +1915,6 @@ RelationCacheInvalidateEntry(Oid relationId)
* so we do not touch new-in-transaction relations; they cannot be targets
* of cross-backend SI updates (and our own updates now go through a
* separate linked list that isn't limited by the SI message buffer size).
* We don't do anything special for newRelfilenode-in-transaction relations,
* though since we have a lock on the relation nobody else should be
* generating cache invalidation messages for it anyhow.
*
* We do this in two phases: the first pass deletes deletable items, and
* the second one rebuilds the rebuildable items. This is essential for
@ -1960,6 +1957,14 @@ RelationCacheInvalidate(void)
if (relation->rd_createSubid != InvalidSubTransactionId)
continue;
/*
* Reset newRelfilenode hint. It is never used for correctness, only
* for performance optimization. An incorrectly set hint can lead
* to data loss in some circumstances, so play safe.
*/
if (relation->rd_newRelfilenodeSubid != InvalidSubTransactionId)
relation->rd_newRelfilenodeSubid = InvalidSubTransactionId;
relcacheInvalsReceived++;
if (RelationHasReferenceCountZero(relation))
@ -2011,6 +2016,17 @@ RelationCacheInvalidate(void)
list_free(rebuildList);
}
/*
* RelationCacheResetAtEOXact
*
* Register that work will be required at main-transaction commit or abort
*/
void
RelationCacheResetAtEOXact(void)
{
need_eoxact_work = true;
}
/*
* AtEOXact_RelationCache
*
@ -2161,7 +2177,7 @@ AtEOSubXact_RelationCache(bool isCommit, SubTransactionId mySubid,
if (isCommit)
relation->rd_newRelfilenodeSubid = parentSubid;
else
relation->rd_newRelfilenodeSubid = InvalidSubTransactionId;
relation->rd_newRelfilenodeSubid = InvalidSubTransactionId;
}
/*
@ -2255,7 +2271,7 @@ RelationBuildLocalRelation(const char *relname,
rel->rd_newRelfilenodeSubid = InvalidSubTransactionId;
/* must flag that we have rels created in this transaction */
need_eoxact_work = true;
RelationCacheResetAtEOXact();
/* is it a temporary relation? */
rel->rd_istemp = isTempNamespace(relnamespace);
@ -2911,7 +2927,7 @@ RelationSetIndexList(Relation relation, List *indexIds, Oid oidIndex)
relation->rd_oidindex = oidIndex;
relation->rd_indexvalid = 2; /* mark list as forced */
/* must flag that we have a forced index list */
need_eoxact_work = true;
RelationCacheResetAtEOXact();
}
/*