diff options
Diffstat (limited to 'src/backend/access')
| -rw-r--r-- | src/backend/access/transam/xact.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/src/backend/access/transam/xact.c b/src/backend/access/transam/xact.c index b59cea044b9..3716a85dfb2 100644 --- a/src/backend/access/transam/xact.c +++ b/src/backend/access/transam/xact.c @@ -10,7 +10,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.220 2006/04/25 00:25:17 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.221 2006/06/20 22:51:59 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -167,9 +167,10 @@ static SubTransactionId currentSubTransactionId; static CommandId currentCommandId; /* - * This is the value of now(), ie, the transaction start time. - * This does not change as we enter and exit subtransactions, so we don't - * keep it inside the TransactionState stack. + * xactStartTimestamp is the value of transaction_timestamp(). + * stmtStartTimestamp is the value of statement_timestamp(). + * These do not change as we enter and exit subtransactions, so we don't + * keep them inside the TransactionState stack. */ static TimestampTz xactStartTimestamp; static TimestampTz stmtStartTimestamp; @@ -1386,7 +1387,9 @@ StartTransaction(void) XactLockTableInsert(s->transactionId); /* - * now() and statement_timestamp() should be the same time + * set transaction_timestamp() (a/k/a now()). We want this to be the + * same as the first command's statement_timestamp(), so don't do a + * fresh GetCurrentTimestamp() call (which'd be expensive anyway). */ xactStartTimestamp = stmtStartTimestamp; |