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| author | Jeff Davis <jdavis@postgresql.org> | 2025-01-10 17:14:37 -0800 |
|---|---|---|
| committer | Jeff Davis <jdavis@postgresql.org> | 2025-01-10 17:14:37 -0800 |
| commit | e0ece2a981ee9068f50c4423e303836c2585eb02 (patch) | |
| tree | b5a61a16ff16405c3c3bcbb4f44089648e166d12 /src/include/executor/executor.h | |
| parent | 34c6e652425fde42c2746f749e31d196fc0d5538 (diff) | |
| download | postgresql-e0ece2a981ee9068f50c4423e303836c2585eb02.tar.gz postgresql-e0ece2a981ee9068f50c4423e303836c2585eb02.zip | |
TupleHashTable: store additional data along with tuple.
Previously, the caller needed to allocate the memory and the
TupleHashTable would store a pointer to it. That wastes space for the
palloc overhead as well as the size of the pointer itself.
Now, the TupleHashTable relies on the caller to correctly specify the
additionalsize, and allocates that amount of space. The caller can
then request a pointer into that space.
Discussion: https://postgr.es/m/b9cbf0219a9859dc8d240311643ff4362fd9602c.camel@j-davis.com
Reviewed-by: Heikki Linnakangas
Diffstat (limited to 'src/include/executor/executor.h')
| -rw-r--r-- | src/include/executor/executor.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/include/executor/executor.h b/src/include/executor/executor.h index f8a8d03e533..a49c32072e3 100644 --- a/src/include/executor/executor.h +++ b/src/include/executor/executor.h @@ -148,9 +148,12 @@ extern TupleHashEntry LookupTupleHashEntry(TupleHashTable hashtable, bool *isnew, uint32 *hash); extern uint32 TupleHashTableHash(TupleHashTable hashtable, TupleTableSlot *slot); +extern size_t TupleHashEntrySize(void); extern TupleHashEntry LookupTupleHashEntryHash(TupleHashTable hashtable, TupleTableSlot *slot, bool *isnew, uint32 hash); +extern MinimalTuple TupleHashEntryGetTuple(TupleHashEntry entry); +extern void *TupleHashEntryGetAdditional(TupleHashEntry entry); extern TupleHashEntry FindTupleHashEntry(TupleHashTable hashtable, TupleTableSlot *slot, ExprState *eqcomp, |