Hello, I believe types are compatible if they can be cast automatically. The pg_cast table record all possible casts between types. If it castcontext is 'a' then I belive it's an automatic conversion which is what I think you want. 'i' implicit means that cast is possible, but must be explicitly cast.
I suspect that you'll need to write a function that consults the table for the type pair. Cheers Doug -----Original Message----- From: pgsql-sql-ow...@postgresql.org [mailto:pgsql-sql-ow...@postgresql.org] On Behalf Of Gianvito Pio Sent: Saturday, March 06, 2010 5:04 AM To: pgsql-sql@postgresql.org Subject: [SQL] Check type compatibility Hi all, is there a way to check if two attribute are type compatible (for example integer and serial, integer and integer, character varying and text, etc..)? Example: IF (compatible (table1.att1, table2.att2)) THEN ... ELSE ... END IF; Thanks -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
