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Refactor XLogOpenRelation() and XLogReadBuffer() in preparation for relation

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forks. XLogOpenRelation() and the associated light-weight relation cache in
xlogutils.c is gone, and XLogReadBuffer() now takes a RelFileNode as argument,
instead of Relation.

For functions that still need a Relation struct during WAL replay, there's a
new function called CreateFakeRelcacheEntry() that returns a fake entry like
XLogOpenRelation() used to.
This commit is contained in:
Heikki Linnakangas
2008-06-12 09:12:31 +00:00
parent c4f2a0458d
commit a213f1ee6c
20 changed files with 295 additions and 427 deletions
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10
src/include/access/xlogutils.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/xlogutils.h,v 1.23 2008/01/01 19:45:56 momjian Exp $
* $PostgreSQL: pgsql/src/include/access/xlogutils.h,v 1.24 2008/06/12 09:12:31 heikki Exp $
*/
#ifndef XLOG_UTILS_H
#define XLOG_UTILS_H
@@ -15,15 +15,15 @@
#include "utils/rel.h"
extern void XLogInitRelationCache(void);
extern void XLogCheckInvalidPages(void);
extern void XLogCloseRelationCache(void);
extern Relation XLogOpenRelation(RelFileNode rnode);
extern void XLogDropRelation(RelFileNode rnode);
extern void XLogDropDatabase(Oid dbid);
extern void XLogTruncateRelation(RelFileNode rnode, BlockNumber nblocks);
extern Buffer XLogReadBuffer(Relation reln, BlockNumber blkno, bool init);
extern Buffer XLogReadBuffer(RelFileNode rnode, BlockNumber blkno, bool init);
extern Relation CreateFakeRelcacheEntry(RelFileNode rnode);
extern void FreeFakeRelcacheEntry(Relation fakerel);
#endif