David Fetter <da...@fetter.org> writes: > While kicking the tires on the new GROUPING() feature, I noticed that > NUMERIC has no cast to bit(n). GROUPING() produces essentially a > bitmap, although the standard mandates for some reason that it be a > numeric type.
> I was thinking it should produce NUMERIC rather than int4 as it does > now in order to accommodate large numbers of columns, but the > usefulness of the bitmap is greatly increased if there's a simple CAST > to bit(n). Maybe INT8 would be a better choice than INT4? But I'm not sure there's any practical use-case for more than 30 grouping sets anyway. Keep in mind the actual output volume probably grows like 2^N. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers