On Tue, Oct 7, 2014 at 11:02 AM, Tom Lane <tgl@xxxxxxxxxxxxx> wrote: > Roughly speaking it's the pairs that have a binary (WITHOUT FUNCTION) > coercion according to pg_cast, although we have special logic for a few > cases such as varchar(M) -> varchar(N). That ones? select t1.typname, t2.typname from pg_cast, pg_type as t1, pg_type as t2 where t1.oid = castsource and t2.oid = casttarget and castmethod = 'b' order by 1, 2; -- Kind regards, Sergey Konoplev PostgreSQL Consultant and DBA http://www.linkedin.com/in/grayhemp +1 (415) 867-9984, +7 (499) 346-7196, +7 (988) 888-1979 gray.ru@xxxxxxxxx -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general