Hello, I have a pretty standard query with two tables:
SELECT table_a.id FROM table_a a, table_b b WHERE ... AND ... AND b.value=...; With the last "AND b.value=..." the query is extremely slow (did not wait for it to end, but more than a minute), because the value column is not indexed (contains items longer than 8K). However the previous conditions "WHERE ... AND ... AND" should have already reduced the candidate rows to just a few (table_b contains over 50m rows). And indeed, removing the last "AND b.value=..." speeds the query to just a millisecond. Is there a way to instruct PostgreSQL to do first the initial "WHERE ... AND ... AND" and then the last "AND b.value=..." on the (very small) result? Thank you and kind regards, T. -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
