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Code review of CLUSTER patch. Clean up problems with relcache getting

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confused, toasted data getting lost, etc.
This commit is contained in:
Tom Lane
2002-08-11 21:17:35 +00:00
parent 9bccdf17f7
commit e44beef712
12 changed files with 560 additions and 431 deletions
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24
src/backend/storage/buffer/bufmgr.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v 1.128 2002/08/06 02:36:34 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v 1.129 2002/08/11 21:17:34 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1038,11 +1038,6 @@ BufferReplace(BufferDesc *bufHdr)
* RelationGetNumberOfBlocks
* Determines the current number of pages in the relation.
* Side effect: relation->rd_nblocks is updated.
*
* Note:
* XXX may fail for huge relations.
* XXX should be elsewhere.
* XXX maybe should be hidden
*/
BlockNumber
RelationGetNumberOfBlocks(Relation relation)
@ -1061,6 +1056,23 @@ RelationGetNumberOfBlocks(Relation relation)
return relation->rd_nblocks;
}
/*
* RelationUpdateNumberOfBlocks
* Forcibly update relation->rd_nblocks.
*
* If the relcache drops an entry for a temp relation, it must call this
* routine after recreating the relcache entry, so that rd_nblocks is
* re-sync'd with reality. See RelationGetNumberOfBlocks.
*/
void
RelationUpdateNumberOfBlocks(Relation relation)
{
if (relation->rd_rel->relkind == RELKIND_VIEW)
relation->rd_nblocks = 0;
else
relation->rd_nblocks = smgrnblocks(DEFAULT_SMGR, relation);
}
/* ---------------------------------------------------------------------
* DropRelationBuffers
*