Check if a user-defined type already exists in PostgreSQL

Question

Say I have created some user-defined types in the DB,

i.e. CREATE TYPE abc ...

Is it then possible to determine if the user-defined type exists

Answer 1

Another alternative

WITH namespace AS(
    SELECT oid 
        FROM pg_namespace 
        WHERE nspname = 'my_schema'
),
type_name AS (
    SELECT 1 type_exist  
        FROM pg_type 
        WHERE typname = 'my_type' AND typnamespace = (SELECT * FROM namespace)
)
SELECT EXISTS (SELECT * FROM type_name);