On 2015-05-14 02:51:42 -0400, Noah Misch wrote: > Covering hash aggregation might entail a large preparatory refactoring > of nodeHash.c, but beyond development cost I can't malign that.
You mean execGrouping.c? Afaics nodeHash.c isn't involved, and it doesn't look very interesting to make it so? Isn't that just calling BuildTupleHashTable() for each to-be-hash-aggregated set, and then make agg_fill_hash_table() target multiple hashtables? This mostly seems to be adding a couple loops and parameters. Greetings, Andres Freund -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
