pgsql: Fix AT TIME ZONE for timestamps without time zones: test=> - Mailing list pgsql-committers

Log Message:
-----------
Fix AT TIME ZONE for timestamps without time zones:

    test=> select ('2005-07-20 00:00:00'::timestamp without time zone) at
    time zone 'Europe/Paris';
            timezone
    ------------------------
     2005-07-19 22:00:00-04

Udpate documentation.

Modified Files:
--------------
    pgsql/doc/src/sgml:
        func.sgml (r1.268 -> r1.269)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/func.sgml.diff?r1=1.268&r2=1.269)
    pgsql/src/backend/utils/adt:
        timestamp.c (r1.141 -> r1.142)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/timestamp.c.diff?r1=1.141&r2=1.142)