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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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9
src/backend/storage/smgr/smgr.c
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@@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/smgr/smgr.c,v 1.109 2008/01/01 19:45:52 momjian Exp $
* $PostgreSQL: pgsql/src/backend/storage/smgr/smgr.c,v 1.110 2008/06/12 09:12:31 heikki Exp $
*
*-------------------------------------------------------------------------
*/
@@ -330,6 +330,13 @@ smgrcreate(SMgrRelation reln, bool isTemp, bool isRedo)
xl_smgr_create xlrec;
PendingRelDelete *pending;
/*
* Exit quickly in WAL replay mode if we've already opened the file.
* If it's open, it surely must exist.
*/
if (isRedo && reln->md_fd != NULL)
return;
/*
* We may be using the target table space for the first time in this
* database, so create a per-database subdirectory if needed.