diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2005-08-26 20:07:17 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2005-08-26 20:07:17 +0000 |
| commit | 26f1202ca318459753a39b2ced5cb6ea9cd8ab8d (patch) | |
| tree | 7fc767c2ad2f343dbbbe7c3e8feae7d97d388cab /src/backend/utils | |
| parent | d5bd53c2c5aea50d0a9c5a445da9da9c34990bd8 (diff) | |
Back-patch fixes for problems with VACUUM destroying t_ctid chains too soon,
and with insufficient paranoia in code that follows t_ctid links.
This patch covers the 7.3 branch.
Diffstat (limited to 'src/backend/utils')
| -rw-r--r-- | src/backend/utils/time/tqual.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/backend/utils/time/tqual.c b/src/backend/utils/time/tqual.c index fb9323d9e86..25e7af0872f 100644 --- a/src/backend/utils/time/tqual.c +++ b/src/backend/utils/time/tqual.c @@ -30,7 +30,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/utils/time/tqual.c,v 1.61.2.1 2005/05/07 21:23:24 tgl Exp $ + * $Header: /cvsroot/pgsql/src/backend/utils/time/tqual.c,v 1.61.2.2 2005/08/26 20:07:17 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -931,10 +931,13 @@ HeapTupleSatisfiesVacuum(HeapTupleHeader tuple, TransactionId OldestXmin) HeapTupleHeaderGetXmax(tuple))) { /* - * inserter also deleted it, so it was never visible to anyone - * else + * Inserter also deleted it, so it was never visible to anyone + * else. However, we can only remove it early if it's not an + * updated tuple; else its parent tuple is linking to it via t_ctid, + * and this tuple mustn't go away before the parent does. */ - return HEAPTUPLE_DEAD; + if (!(tuple->t_infomask & HEAP_UPDATED)) + return HEAPTUPLE_DEAD; } if (!TransactionIdPrecedes(HeapTupleHeaderGetXmax(tuple), OldestXmin)) |