Log Message:
-----------
Add comment documenting actual failure case of using
interval_justify_hours in timestamp subtraction. TODO already has text
description.
Modified Files:
--------------
pgsql/src/backend/utils/adt:
timestamp.c (r1.156 -> r1.157)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/timestamp.c.diff?r1=1.156&r2=1.157)