Re: create type- similar char

Mohsen SM <mohsensoodkhah@gmail.com> writes:
> I create one new type with CREATE TYPE command.
> for my type its INTERNALLENGTH is VARIABLE .
> but I want to my type behavior  similar to char and when I type this query:
> CREATE TABLE tbl (col1 NEWTYPE);
> then when I write this query, so it get an error for it's length:
> insert into tbl values('dd');
> its error is :
> ERROR:  value too long for type character(1)
> but my NEWTYPE don't get this error and work similar to varchar.
> how I can do it?
> I check for char type the bpchar() function. when I work with char type and
> want to insert one word longest one character so, bpchar() called.
> but for my NEWTYPE don't call the newtype() function.

It sounds like you made a length coercion cast function, but didn't
actually declare a cast based on it.  See CREATE CAST.
        regards, tom lane