> > You probably should define your domain like this: > > CREATE DOMAIN myvarchar varchar(42); > That's what I thought, so it won't do what I want. I need to be able to set the length at the time of declaration. So suppose I wanted to implement myvarchar in C. In my _in function, how do I know how big my column declaration is? Eg if someone tries to insert 50 characters into my 42 character field, how do I get the declared length and then tell postgres that the data to be inserted is too big? Thanks James -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general