From 84b96085ba580a5442d144735c627dc3a9f266e7 Mon Sep 17 00:00:00 2001 From: "Vadim B. Mikheev" Date: Wed, 4 Apr 2001 15:43:25 +0000 Subject: [PATCH] Have to lock buffer while changing page' LSN. Thanks to Tom. --- src/backend/commands/sequence.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/backend/commands/sequence.c b/src/backend/commands/sequence.c index 6c7c7a7a3b..a89ba2e5fd 100644 --- a/src/backend/commands/sequence.c +++ b/src/backend/commands/sequence.c @@ -181,13 +181,13 @@ DefineSequence(CreateSeqStmt *seq) /* Now - form & insert sequence tuple */ tuple = heap_formtuple(tupDesc, value, null); heap_insert(rel, tuple); - ReleaseBuffer(buf); /* * After crash REDO of heap_insert above would re-init page and * our magic number would be lost. We have to log sequence creation. * This means two log records instead of one -:( */ + LockBuffer(buf, BUFFER_LOCK_EXCLUSIVE); START_CRIT_SECTION(); { xl_seq_rec xlrec; @@ -217,6 +217,8 @@ DefineSequence(CreateSeqStmt *seq) } END_CRIT_SECTION(); + LockBuffer(buf, BUFFER_LOCK_UNLOCK); + ReleaseBuffer(buf); heap_close(rel, AccessExclusiveLock); } -- 2.39.5