Maxim Boguk wrote: > Sorry with all my respect to you, you look like wrong.
The difference is that the plan with -1 does not need to sort the output, because it comes sorted out of the index; so the execution can be stopped as soon as 5 tuples have come out. With NULL, that can't be done. -- Alvaro Herrera http://www.CommandPrompt.com/ PostgreSQL Replication, Consulting, Custom Development, 24x7 support -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
