Log Message:
-----------
Add missing HOUR TO SECOND option to list of possible INTERVAL field sets,
as noted by Sebastien Flaesch. Also update the claim that we simply throw
away fields outside this set --- that got changed later to only discard
less-significant fields.
Modified Files:
--------------
pgsql/doc/src/sgml:
datatype.sgml (r1.239 -> r1.240)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/datatype.sgml?r1=1.239&r2=1.240)