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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2004-09-11 18:28:34 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2004-09-11 18:28:34 +0000 |
| commit | 493f72606b463a75ae4e2ee4e64d829e7f56066d (patch) | |
| tree | 8645b7d58f6e333f4d10948051be2bd7e38002be /src/backend/executor | |
| parent | 9835944e54ace63b040d2d2e78eaa0b78aca1bed (diff) | |
| download | postgresql-493f72606b463a75ae4e2ee4e64d829e7f56066d.tar.gz postgresql-493f72606b463a75ae4e2ee4e64d829e7f56066d.zip | |
Renumber SnapshotNow and the other special snapshot codes so that
((Snapshot) NULL) can no longer be confused with a valid snapshot,
as per my recent suggestion. Define a macro InvalidSnapshot for 0.
Use InvalidSnapshot instead of SnapshotAny as the do-nothing special
case for heap_update and heap_delete crosschecks; this seems a little
cleaner even though the behavior is really the same.
Diffstat (limited to 'src/backend/executor')
| -rw-r--r-- | src/backend/executor/execMain.c | 4 | ||||
| -rw-r--r-- | src/backend/executor/execUtils.c | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/src/backend/executor/execMain.c b/src/backend/executor/execMain.c index d77bc7054a3..b009e73e105 100644 --- a/src/backend/executor/execMain.c +++ b/src/backend/executor/execMain.c @@ -26,7 +26,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/executor/execMain.c,v 1.236 2004/08/29 05:06:42 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/executor/execMain.c,v 1.237 2004/09/11 18:28:34 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -176,7 +176,7 @@ ExecutorStart(QueryDesc *queryDesc, bool useCurrentSnapshot, bool explainOnly) { /* normal query --- use query snapshot, no crosscheck */ estate->es_snapshot = CopyQuerySnapshot(); - estate->es_crosscheck_snapshot = SnapshotAny; + estate->es_crosscheck_snapshot = InvalidSnapshot; } /* diff --git a/src/backend/executor/execUtils.c b/src/backend/executor/execUtils.c index 79ab787b07a..a1736766b26 100644 --- a/src/backend/executor/execUtils.c +++ b/src/backend/executor/execUtils.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/executor/execUtils.c,v 1.114 2004/08/29 05:06:42 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/executor/execUtils.c,v 1.115 2004/09/11 18:28:34 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -179,7 +179,7 @@ CreateExecutorState(void) */ estate->es_direction = ForwardScanDirection; estate->es_snapshot = SnapshotNow; - estate->es_crosscheck_snapshot = SnapshotAny; /* means no crosscheck */ + estate->es_crosscheck_snapshot = InvalidSnapshot; /* no crosscheck */ estate->es_range_table = NIL; estate->es_result_relations = NULL; |