diff options
| author | Alvaro Herrera | 2009-10-02 17:57:30 +0000 |
|---|---|---|
| committer | Alvaro Herrera | 2009-10-02 17:57:30 +0000 |
| commit | caa4cfa3697472a6673eb817eb34681684cba14f (patch) | |
| tree | 8da52acab9865afa01f6771a33f3eb9a5952b6fa /src/include | |
| parent | fabf75cffc34b187aba57b0d3a086ebec586d016 (diff) | |
Ensure that a cursor has an immutable snapshot throughout its lifespan.
The old coding was using a regular snapshot, referenced elsewhere, that was
subject to having its command counter updated. Fix by creating a private copy
of the snapshot exclusively for the cursor.
Backpatch to 8.4, which is when the bug was introduced during the snapshot
management rewrite.
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/utils/snapmgr.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/include/utils/snapmgr.h b/src/include/utils/snapmgr.h index 979a52c6224..a82e53bb17a 100644 --- a/src/include/utils/snapmgr.h +++ b/src/include/utils/snapmgr.h @@ -6,7 +6,7 @@ * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/utils/snapmgr.h,v 1.5 2009/06/11 14:49:13 momjian Exp $ + * $PostgreSQL: pgsql/src/include/utils/snapmgr.h,v 1.6 2009/10/02 17:57:30 alvherre Exp $ * *------------------------------------------------------------------------- */ @@ -26,6 +26,7 @@ extern TransactionId RecentGlobalXmin; extern Snapshot GetTransactionSnapshot(void); extern Snapshot GetLatestSnapshot(void); extern void SnapshotSetCommandId(CommandId curcid); +extern Snapshot CopySnapshot(Snapshot snapshot); extern void PushActiveSnapshot(Snapshot snapshot); extern void PushUpdatedSnapshot(Snapshot snapshot); |