Log Message:
-----------
Add comment about the two different query strings that ExecuteQuery()
has to deal with.
Modified Files:
--------------
pgsql/src/backend/commands:
prepare.c (r1.88 -> r1.89)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/prepare.c?r1=1.88&r2=1.89)