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 Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/4eaea3db150af56aa2e40efe91997fd25f3b6d73 Modified Files -------------- src/backend/executor/execGrouping.c | 108 ++++++++++++++++++++++++++---------- src/include/executor/executor.h | 5 ++ 2 files changed, 83 insertions(+), 30 deletions(-)
