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Restructure smgr API as per recent proposal. smgr no longer depends on

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the relcache, and so the notion of 'blind write' is gone.  This should
improve efficiency in bgwriter and background checkpoint processes.
Internal restructuring in md.c to remove the not-very-useful array of
MdfdVec objects --- might as well just use pointers.
Also remove the long-dead 'persistent main memory' storage manager (mm.c),
since it seems quite unlikely to ever get resurrected.
This commit is contained in:
Tom Lane
2004-02-10 01:55:27 +00:00
parent f06e79525a
commit 87bd956385
37 changed files with 933 additions and 1776 deletions
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19
src/include/utils/rel.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/rel.h,v 1.72 2004/01/06 18:07:32 neilc Exp $
* $PostgreSQL: pgsql/src/include/utils/rel.h,v 1.73 2004/02/10 01:55:27 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -20,7 +20,6 @@
#include "catalog/pg_index.h"
#include "rewrite/prs2lock.h"
#include "storage/block.h"
#include "storage/fd.h"
#include "storage/relfilenode.h"
@@ -98,16 +97,16 @@ typedef struct PgStat_Info
bool index_scan_counted;
} PgStat_Info;
/*
* Here are the contents of a relation cache entry.
*/
typedef struct RelationData
{
File rd_fd; /* open file descriptor, or -1 if
* none; this is NOT an operating
* system file descriptor */
RelFileNode rd_node; /* file node (physical identifier) */
RelFileNode rd_node; /* relation physical identifier */
/* use "struct" here to avoid needing to include smgr.h: */
struct SMgrRelationData *rd_smgr; /* cached file handle, or NULL */
BlockNumber rd_nblocks; /* number of blocks in rel */
BlockNumber rd_targblock; /* current insertion target block, or
* InvalidBlockNumber */
@@ -226,14 +225,6 @@ typedef Relation *RelationPtr;
*/
#define RelationGetRelid(relation) ((relation)->rd_id)
/*
* RelationGetFile
* Returns the open file descriptor for the rel, or -1 if
* none. This is NOT an operating system file descriptor; see md.c
* for more information
*/
#define RelationGetFile(relation) ((relation)->rd_fd)
/*
* RelationGetNumberOfAttributes
* Returns the number of attributes in a relation.