Re: Custom type's modifiers

Marthin Laubscher <postgres@lobeshare.co.za> writes:
> But now I need to (re)define MyType to support type modifiers (e.g. MyType(1,14,18)) and I got that done using CREATE
TYPE’sTYPMOD_IN and TYPMOD_OUT parameters resulting in the correct packed value getting stored in pg_attribute when I
definea column of that type.  

OK ...

> But when I pass a MyType value to a function defined in my C extension how would I access the type modifier value for
theargument which could have been drawn from the catalog or the result of a cast.  

You can't.  Whatever info is needed by operations on the type had
better be embedded in the value.

            regards, tom lane