"hx.li" <fly2nn@xxxxxxx> writes: > If we could consider it is equivalent transformation as follow? > select * from t_1 full outer join t_3 on t_1.a=1; > and > select * from t_1 full outer join t_3 on true where t_1.a=1; Those are not equivalent. regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
