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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2005-08-25 19:45:06 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2005-08-25 19:45:06 +0000 |
| commit | 08e12b89d5e094315f2b5d238916b2f56ad8ad7a (patch) | |
| tree | 83461a63669fe228bebaaa2722ab281e0d2da58f /src/backend/utils | |
| parent | 5576a611cd8f358a751f53ad787b4b659bbf77cc (diff) | |
| download | postgresql-08e12b89d5e094315f2b5d238916b2f56ad8ad7a.tar.gz postgresql-08e12b89d5e094315f2b5d238916b2f56ad8ad7a.zip | |
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 8.0 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 ef158d97bc3..eda347e2750 100644 --- a/src/backend/utils/time/tqual.c +++ b/src/backend/utils/time/tqual.c @@ -32,7 +32,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/utils/time/tqual.c,v 1.81.4.1 2005/05/07 21:22:36 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/utils/time/tqual.c,v 1.81.4.2 2005/08/25 19:45:01 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -1137,10 +1137,13 @@ 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)) |