pgsql: Done > * -Use indexes for MIN() and MAX()

Log Message:
-----------
Done

* -Use indexes for MIN() and MAX()

Modified Files:
--------------
pgsql/doc:
TODO (r1.1488 -> r1.1489)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1488&r2=1.1489)