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Rethink the way FSM truncation works. Instead of WAL-logging FSM

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truncations in FSM code, call FreeSpaceMapTruncateRel from smgr_redo. To
make that cleaner from modularity point of view, move the WAL-logging one
level up to RelationTruncate, and move RelationTruncate and all the
related WAL-logging to new src/backend/catalog/storage.c file. Introduce
new RelationCreateStorage and RelationDropStorage functions that are used
instead of calling smgrcreate/smgrscheduleunlink directly. Move the
pending rel deletion stuff from smgrcreate/smgrscheduleunlink to the new
functions. This leaves smgr.c as a thin wrapper around md.c; all the
transactional stuff is now in storage.c.

This will make it easier to add new forks with similar truncation logic,
like the visibility map.
This commit is contained in:
Heikki Linnakangas
2008-11-19 10:34:52 +00:00
parent 26e6c896c9
commit 3396000684
30 changed files with 675 additions and 794 deletions
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18
src/include/storage/smgr.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/storage/smgr.h,v 1.63 2008/08/11 11:05:11 heikki Exp $
* $PostgreSQL: pgsql/src/include/storage/smgr.h,v 1.64 2008/11/19 10:34:52 heikki Exp $
*
*-------------------------------------------------------------------------
*/
@@ -65,10 +65,7 @@ extern void smgrsetowner(SMgrRelation *owner, SMgrRelation reln);
extern void smgrclose(SMgrRelation reln);
extern void smgrcloseall(void);
extern void smgrclosenode(RelFileNode rnode);
extern void smgrcreate(SMgrRelation reln, ForkNumber forknum,
bool isTemp, bool isRedo);
extern void smgrscheduleunlink(SMgrRelation reln, ForkNumber forknum,
bool isTemp);
extern void smgrcreate(SMgrRelation reln, ForkNumber forknum, bool isRedo);
extern void smgrdounlink(SMgrRelation reln, ForkNumber forknum,
bool isTemp, bool isRedo);
extern void smgrextend(SMgrRelation reln, ForkNumber forknum,
@@ -81,21 +78,10 @@ extern BlockNumber smgrnblocks(SMgrRelation reln, ForkNumber forknum);
extern void smgrtruncate(SMgrRelation reln, ForkNumber forknum,
BlockNumber nblocks, bool isTemp);
extern void smgrimmedsync(SMgrRelation reln, ForkNumber forknum);
extern void smgrDoPendingDeletes(bool isCommit);
extern int smgrGetPendingDeletes(bool forCommit, RelFileFork **ptr,
bool *haveNonTemp);
extern void AtSubCommit_smgr(void);
extern void AtSubAbort_smgr(void);
extern void PostPrepare_smgr(void);
extern void smgrcommit(void);
extern void smgrabort(void);
extern void smgrpreckpt(void);
extern void smgrsync(void);
extern void smgrpostckpt(void);
extern void smgr_redo(XLogRecPtr lsn, XLogRecord *record);
extern void smgr_desc(StringInfo buf, uint8 xl_info, char *rec);
/* internals: move me elsewhere -- ay 7/94 */