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Tweak hash index AM to use the new ReadOrZeroBuffer bufmgr API when fetching

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pages it intends to zero immediately.  Just to show there is some use for that
function besides WAL recovery :-).
Along the way, fold _hash_checkpage and _hash_pageinit calls into _hash_getbuf
and friends, instead of expecting callers to do that separately.
This commit is contained in:
Tom Lane
2007-05-03 16:45:58 +00:00
parent 1aefa0489f
commit 0fef38da21
8 changed files with 110 additions and 85 deletions
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8
src/include/access/hash.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/hash.h,v 1.79 2007/04/19 20:24:04 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/hash.h,v 1.80 2007/05/03 16:45:58 tgl Exp $
*
* NOTES
* modeled after Margo Seltzer's hash implementation for unix.
@@ -283,8 +283,10 @@ extern void _hash_squeezebucket(Relation rel,
extern void _hash_getlock(Relation rel, BlockNumber whichlock, int access);
extern bool _hash_try_getlock(Relation rel, BlockNumber whichlock, int access);
extern void _hash_droplock(Relation rel, BlockNumber whichlock, int access);
extern Buffer _hash_getbuf(Relation rel, BlockNumber blkno, int access);
extern Buffer _hash_getnewbuf(Relation rel, BlockNumber blkno, int access);
extern Buffer _hash_getbuf(Relation rel, BlockNumber blkno,
int access, int flags);
extern Buffer _hash_getinitbuf(Relation rel, BlockNumber blkno);
extern Buffer _hash_getnewbuf(Relation rel, BlockNumber blkno);
extern void _hash_relbuf(Relation rel, Buffer buf);
extern void _hash_dropbuf(Relation rel, Buffer buf);
extern void _hash_wrtbuf(Relation rel, Buffer buf);