I don't think I understood all that. Anyway, is there a way to fix this - either by rewriting the query or by creating an index? The output does match what I am expecting. It does take more than 10 times the time taken by Oracle for the same result, with PostgreSQL taking more than 20 minutes. I am sort of stuck on this since this query does get executed often. By the way, changing the filter from FAMNAM to GIVENNAME fetches results in 90 seconds. Probably there is a difference in the cardinality of values in these 2 columns. -- View this message in context: http://postgresql.1045698.n5.nabble.com/Query-performance-issue-tp4753453p4768047.html Sent from the PostgreSQL - performance mailing list archive at Nabble.com. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
