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Diffstat (limited to 'src/backend/utils/time/tqual.c')
| -rw-r--r-- | src/backend/utils/time/tqual.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/backend/utils/time/tqual.c b/src/backend/utils/time/tqual.c index f9da9e17f52..bbac4083c98 100644 --- a/src/backend/utils/time/tqual.c +++ b/src/backend/utils/time/tqual.c @@ -45,6 +45,8 @@ * like HeapTupleSatisfiesSelf(), but includes open transactions * HeapTupleSatisfiesVacuum() * visible to any running transaction, used by VACUUM + * HeapTupleSatisfiesNonVacuumable() + * Snapshot-style API for HeapTupleSatisfiesVacuum * HeapTupleSatisfiesToast() * visible unless part of interrupted vacuum, used for TOAST * HeapTupleSatisfiesAny() @@ -1392,6 +1394,26 @@ HeapTupleSatisfiesVacuum(HeapTuple htup, TransactionId OldestXmin, return HEAPTUPLE_DEAD; } + +/* + * HeapTupleSatisfiesNonVacuumable + * + * True if tuple might be visible to some transaction; false if it's + * surely dead to everyone, ie, vacuumable. + * + * This is an interface to HeapTupleSatisfiesVacuum that meets the + * SnapshotSatisfiesFunc API, so it can be used through a Snapshot. + * snapshot->xmin must have been set up with the xmin horizon to use. + */ +bool +HeapTupleSatisfiesNonVacuumable(HeapTuple htup, Snapshot snapshot, + Buffer buffer) +{ + return HeapTupleSatisfiesVacuum(htup, snapshot->xmin, buffer) + != HEAPTUPLE_DEAD; +} + + /* * HeapTupleIsSurelyDead * |