"Anibal David Acosta" <aa@xxxxxxxxxxxx> writes: > I have a table with a column of type timestamp with time zone, this column > has an index > If I do a select like this > select * from mytable where cast(my_date as timestamp without time zone) > > '2012-10-12 20:00:00' > this query will use the index over the my_date column? No. The cast seems rather pointless though ... regards, tom lane -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance