Re: enum bug

On Fri, Mar 11, 2016 at 4:19 PM, Elein <elein@varlena.com> wrote:

An unused (yet) enum type cannot display the enum ranges. An empty table containing that type cannot display enum ranges. 

​Yes, it can.

​CREATE TYPE rainbow AS enum ('red','orange','yellow','blue','purple');

SELECT enum_range(null::rainbow);

enum_range

{red,orange,yellow,blue,purple}

I get the distinction between classes and objects.  But in many cases, like this one, you need to obtain an instance of a class - a null is generally sufficient - and pass that instance to a function.  The function can then use "pg_typeof(instance_value)::oid" to derive the oid for the corresponding class.  This is a common idiom in PostgreSQL.

The only improvement, besides the error handling point, that I see to be had here is your understanding of how the system works.

David J.