Log Message:-----------Add comment about why BETWEEN uses operator strings and not opclasses,with URL pointing to email discussion.
Modified Files:-------------- pgsql/src/backend/parser: gram.y (r2.651 -> r2.652) (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/gram.y?r1=2.651&r2=2.652)
