diff options
Diffstat (limited to 'src/backend/utils/time/snapmgr.c')
| -rw-r--r-- | src/backend/utils/time/snapmgr.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/backend/utils/time/snapmgr.c b/src/backend/utils/time/snapmgr.c index 841a92567d1..0add5f489c4 100644 --- a/src/backend/utils/time/snapmgr.c +++ b/src/backend/utils/time/snapmgr.c @@ -22,7 +22,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/utils/time/snapmgr.c,v 1.4 2008/07/11 02:10:14 alvherre Exp $ + * $PostgreSQL: pgsql/src/backend/utils/time/snapmgr.c,v 1.5 2008/09/11 14:01:10 alvherre Exp $ * *------------------------------------------------------------------------- */ @@ -59,10 +59,14 @@ static Snapshot SecondarySnapshot = NULL; * These are updated by GetSnapshotData. We initialize them this way * for the convenience of TransactionIdIsInProgress: even in bootstrap * mode, we don't want it to say that BootstrapTransactionId is in progress. + * + * RecentGlobalXmin is initialized to InvalidTransactionId, to ensure that no + * one tries to use a stale value. Readers should ensure that it has been set + * to something else before using it. */ TransactionId TransactionXmin = FirstNormalTransactionId; TransactionId RecentXmin = FirstNormalTransactionId; -TransactionId RecentGlobalXmin = FirstNormalTransactionId; +TransactionId RecentGlobalXmin = InvalidTransactionId; /* * Elements of the list of registered snapshots. |