diff options
| author | Tom Lane | 2007-11-15 20:36:40 +0000 |
|---|---|---|
| committer | Tom Lane | 2007-11-15 20:36:40 +0000 |
| commit | 6cc4451b5c47eac02e09c3342281da469374432d (patch) | |
| tree | a97187cef1c3c2a95b7094fd46d68b0f448d7f33 /src/include | |
| parent | 7a550cb95cf3a541deed15df1d5e25f36af636e5 (diff) | |
Prevent re-use of a deleted relation's relfilenode until after the next
checkpoint. This guards against an unlikely data-loss scenario in which
we re-use the relfilenode, then crash, then replay the deletion and
recreation of the file. Even then we'd be OK if all insertions into the
new relation had been WAL-logged ... but that's not guaranteed given all
the no-WAL-logging optimizations that have recently been added.
Patch by Heikki Linnakangas, per a discussion last month.
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/storage/smgr.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/include/storage/smgr.h b/src/include/storage/smgr.h index bc071e7ef0..87b0171a1b 100644 --- a/src/include/storage/smgr.h +++ b/src/include/storage/smgr.h @@ -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/storage/smgr.h,v 1.59 2007/09/05 18:10:48 tgl Exp $ + * $PostgreSQL: pgsql/src/include/storage/smgr.h,v 1.60 2007/11/15 20:36:40 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -83,7 +83,9 @@ 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); @@ -104,7 +106,9 @@ extern void mdwrite(SMgrRelation reln, BlockNumber blocknum, char *buffer, extern BlockNumber mdnblocks(SMgrRelation reln); extern void mdtruncate(SMgrRelation reln, BlockNumber nblocks, bool isTemp); extern void mdimmedsync(SMgrRelation reln); +extern void mdpreckpt(void); extern void mdsync(void); +extern void mdpostckpt(void); extern void RememberFsyncRequest(RelFileNode rnode, BlockNumber segno); extern void ForgetRelationFsyncRequests(RelFileNode rnode); |