diff options
Diffstat (limited to 'src/backend/utils/time/snapmgr.c')
| -rw-r--r-- | src/backend/utils/time/snapmgr.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/src/backend/utils/time/snapmgr.c b/src/backend/utils/time/snapmgr.c index e739d2d192b..3bf42423313 100644 --- a/src/backend/utils/time/snapmgr.c +++ b/src/backend/utils/time/snapmgr.c @@ -11,7 +11,7 @@ * regd_count and count it in RegisteredSnapshots, but this reference is not * tracked by a resource owner. We used to use the TopTransactionResourceOwner * to track this snapshot reference, but that introduces logical circularity - * and thus makes it impossible to clean up in a sane fashion. It's better to + * and thus makes it impossible to clean up in a sane fashion. It's better to * handle this reference as an internally-tracked registration, so that this * module is entirely lower-level than ResourceOwners. * @@ -20,9 +20,9 @@ * tracked by any resource owner. * * These arrangements let us reset MyPgXact->xmin when there are no snapshots - * referenced by this transaction. (One possible improvement would be to be + * referenced by this transaction. (One possible improvement would be to be * able to advance Xmin when the snapshot with the earliest Xmin is no longer - * referenced. That's a bit harder though, it requires more locking, and + * referenced. That's a bit harder though, it requires more locking, and * anyway it should be rather uncommon to keep temporary snapshots referenced * for too long.) * @@ -57,7 +57,7 @@ * CurrentSnapshot points to the only snapshot taken in transaction-snapshot * mode, and to the latest one taken in a read-committed transaction. * SecondarySnapshot is a snapshot that's always up-to-date as of the current - * instant, even in transaction-snapshot mode. It should only be used for + * instant, even in transaction-snapshot mode. It should only be used for * special-purpose code (say, RI checking.) * * These SnapshotData structs are static to simplify memory allocation @@ -76,7 +76,7 @@ static Snapshot SecondarySnapshot = NULL; * 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 + * one tries to use a stale value. Readers should ensure that it has been set * to something else before using it. */ TransactionId TransactionXmin = FirstNormalTransactionId; @@ -114,7 +114,7 @@ static int RegisteredSnapshots = 0; bool FirstSnapshotSet = false; /* - * Remember the serializable transaction snapshot, if any. We cannot trust + * Remember the serializable transaction snapshot, if any. We cannot trust * FirstSnapshotSet in combination with IsolationUsesXactSnapshot(), because * GUC may be reset before us, changing the value of IsolationUsesXactSnapshot. */ @@ -286,7 +286,7 @@ SetTransactionSnapshot(Snapshot sourcesnap, TransactionId sourcexid) /* * In transaction-snapshot mode, the first snapshot must live until end of - * xact, so we must make a copy of it. Furthermore, if we're running in + * xact, so we must make a copy of it. Furthermore, if we're running in * serializable mode, predicate.c needs to do its own processing. */ if (IsolationUsesXactSnapshot()) @@ -382,7 +382,7 @@ FreeSnapshot(Snapshot snapshot) * * If the passed snapshot is a statically-allocated one, or it is possibly * subject to a future command counter update, create a new long-lived copy - * with active refcount=1. Otherwise, only increment the refcount. + * with active refcount=1. Otherwise, only increment the refcount. */ void PushActiveSnapshot(Snapshot snap) @@ -751,7 +751,7 @@ ExportSnapshot(Snapshot snapshot) * However, we haven't got enough information to do that, since we don't * know if we're at top level or not. For example, we could be inside a * plpgsql function that is going to fire off other transactions via - * dblink. Rather than disallow perfectly legitimate usages, don't make a + * dblink. Rather than disallow perfectly legitimate usages, don't make a * check. * * Also note that we don't make any restriction on the transaction's @@ -964,7 +964,7 @@ parseXidFromText(const char *prefix, char **s, const char *filename) /* * ImportSnapshot - * Import a previously exported snapshot. The argument should be a + * Import a previously exported snapshot. The argument should be a * filename in SNAPSHOT_EXPORT_DIR. Load the snapshot from that file. * This is called by "SET TRANSACTION SNAPSHOT 'foo'". */ |