On Tue, Dec 9, 2014 at 4:24 AM, Albe Laurenz <laurenz.a...@wien.gv.at> wrote: > SELECT ... > FROM people p > LEFT JOIN LATERAL (SELECT * FROM names n > WHERE n.people_id = p.people_id > AND current_timestamp > n.validfrom > ORDER BY n.validfrom DESC LIMIT 1) n > ON TRUE > WHERE p.id = ... > > With the correct index this touched fewer blocks and worked faster. > Also, though this is of course a matter of taste, it is more readable. > > Of course this forces a nested loop, but that is not bad as such. > In my case it was not problem (I tried to hint at that with the WHERE clause).
I don't know...forcing a nestloop is a dealbreaker for many distributions of data. merlin -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
