Sebastian Boehm <pg@xxxxxxxxxxxx> writes: > the functions function_in and function_out should be called > automatically on select or insert / update. > How can I change the table definition to use function_in and > function_out transparently for me (as if the table had a text colum) You would have to create a new data type and make those functions be the I/O functions of the type. It sorta looks to me like you are reinventing the concept of an ENUM column. This has been done before --- see enumkit http://archives.postgresql.org/pgsql-hackers/2005-10/msg01243.php as well as the currently pending patch to integrate the feature into core Postgres. regards, tom lane
