postgres.git / summary / log / commit / refs

commit    85506ffbd51e15dffbd307e4d1060cfffb24c9e0
Author:   Tom Lane <tgl@sss.pgh.pa.us>
Date:     Fri Jul 20 16:29:59 2007 +0000
First released in: 8.3.0, 8.0.14, 8.1.10, 8.2.5

    Fix WAL replay of truncate operations to cope with the possibility that the
    truncated relation was deleted later in the WAL sequence.  Since replay
    normally auto-creates a relation upon its first reference by a WAL log entry,
    failure is seen only if the truncate entry happens to be the first reference
    after the checkpoint we're restarting from; which is a pretty unusual case but
    of course not impossible.  Fix by making truncate entries auto-create like
    the other ones do.  Per report and test case from Dharmendra Goyal.


 src/backend/storage/smgr/smgr.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/backend/storage/smgr/smgr.c b/src/backend/storage/smgr/smgr.c
index 3d4f5b5ccd8..8831edac701 100644
--- a/src/backend/storage/smgr/smgr.c
+++ b/src/backend/storage/smgr/smgr.c
@@ -11,7 +11,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/storage/smgr/smgr.c,v 1.101.2.1 2007/07/08 22:23:25 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/storage/smgr/smgr.c,v 1.101.2.2 2007/07/20 16:29:59 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -912,6 +912,14 @@ smgr_redo(XLogRecPtr lsn, XLogRecord *record)
 
 		reln = smgropen(xlrec->rnode);
 
+		/*
+		 * Forcibly create relation if it doesn't exist (which suggests that
+		 * it was dropped somewhere later in the WAL sequence).  As in
+		 * XLogOpenRelation, we prefer to recreate the rel and replay the
+		 * log as best we can until the drop is seen.
+		 */
+		smgrcreate(reln, false, true);
+
 		/* Can't use smgrtruncate because it would try to xlog */
 
 		/*


[parent: 8208fb4b6305]