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Remove dependency on HeapTuple from predicate locking functions.

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The following changes make the predicate locking functions more
generic and suitable for use by future access methods:

- PredicateLockTuple() is renamed to PredicateLockTID().  It takes
  ItemPointer and inserting transaction ID instead of HeapTuple.

- CheckForSerializableConflictIn() takes blocknum instead of buffer.

- CheckForSerializableConflictOut() no longer takes HeapTuple or buffer.

Author: Ashwin Agrawal
Reviewed-by: Andres Freund, Kuntal Ghosh, Thomas Munro
Discussion: https://postgr.es/m/CALfoeiv0k3hkEb3Oqk%3DziWqtyk2Jys1UOK5hwRBNeANT_yX%2Bng%40mail.gmail.com
This commit is contained in:
Thomas Munro
2020-01-28 13:13:04 +13:00
parent 4589c6a2a3
commit 6f38d4dac3
12 changed files with 176 additions and 130 deletions
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2
src/include/access/heapam.h
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@@ -220,5 +220,7 @@ extern bool ResolveCminCmaxDuringDecoding(struct HTAB *tuplecid_data,
HeapTuple htup,
Buffer buffer,
CommandId *cmin, CommandId *cmax);
extern void HeapCheckForSerializableConflictOut(bool valid, Relation relation, HeapTuple tuple,
Buffer buffer, Snapshot snapshot);
#endif /* HEAPAM_H */