According to <http://www.postgresql.org/docs/current/static/datatype.html>, 'timestamp' defaults to 'timestamp with time zone'. But that page also lists 'timestamp' an alias for 'timestamp without time zone'.
Something's not right.
--
Josh Purinton
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
