Thank you very much Tom. This is very helpful. -- View this message in context: http://www.postgresql-archive.org/Speed-differences-between-in-executing-the-same-query-tp5960964p5961041.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