diff options
| author | Jeff Davis | 2020-02-07 03:39:47 +0000 |
|---|---|---|
| committer | Jeff Davis | 2020-02-07 04:34:01 +0000 |
| commit | 4eaea3db150af56aa2e40efe91997fd25f3b6d73 (patch) | |
| tree | 8ccd0fb526260581c2356faa9a6f54909b6ff1b2 /src/include/executor | |
| parent | e6f86f8dd9835b18890fd8e9868884dec37e3bd7 (diff) | |
Introduce TupleHashTableHash() and LookupTupleHashEntryHash().
Expose two new entry points: one for only calculating the hash value
of a tuple, and another for looking up a hash entry when the hash
value is already known. This will be useful for disk-based Hash
Aggregation to avoid recomputing the hash value for the same tuple
after saving and restoring it from disk.
Discussion: https://postgr.es/m/37091115219dd522fd9ed67333ee8ed1b7e09443.camel%40j-davis.com
Diffstat (limited to 'src/include/executor')
| -rw-r--r-- | src/include/executor/executor.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/include/executor/executor.h b/src/include/executor/executor.h index 6ef3e1fe069..e49cb110461 100644 --- a/src/include/executor/executor.h +++ b/src/include/executor/executor.h @@ -140,6 +140,11 @@ extern TupleHashTable BuildTupleHashTableExt(PlanState *parent, extern TupleHashEntry LookupTupleHashEntry(TupleHashTable hashtable, TupleTableSlot *slot, bool *isnew); +extern uint32 TupleHashTableHash(struct tuplehash_hash *tb, + const MinimalTuple tuple); +extern TupleHashEntry LookupTupleHashEntryHash(TupleHashTable hashtable, + TupleTableSlot *slot, + bool *isnew, uint32 hash); extern TupleHashEntry FindTupleHashEntry(TupleHashTable hashtable, TupleTableSlot *slot, ExprState *eqcomp, |