Martijn that is a good question. It's because we are only concerned with a subset of events for this index and this particular query. The query planner can recognise this and use the index correctly. By doing this, we reduce the size of the index significantly. In the best case, where we only wanted a few things, the index was reduced from 21GB to 8MB. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
