adding column with pgadmin gui takes > 800 secs.

["wouter(dot)aukema(at)gmail(dot)com" <wouter(dot)aukema(at)gmail(dot)com>]

I'm having an interesting issue, not sure if it's the server or pgadmin
client:

When trying to add a column (with pgadmin gui) to an already existing
table, a query as shown below is executed on the server:
SELECT	format_type(t.oid,NULL) AS typname,
	CASE WHEN typelem > 0 THEN typelem ELSE t.oid END as elemoid,
	typlen,
	typtype,
	t.oid,
	nspname,
        (	SELECT	COUNT(1)
		FROM 	pg_type t2
		WHERE 	t2.typname = t.typname
	)       > 1 AS isdup
          FROM pg_type t
          JOIN pg_namespace nsp ON typnamespace=nsp.oid
         WHERE (NOT (typname = 'unknown' AND nspname = 'pg_catalog'))
AND typisdefined AND typtype IN ('b', 'c', 'd')AND typname NOT IN
(SELECT relname FROM pg_class WHERE relnamespace = typnamespace AND
relkind != 'c')
         ORDER BY CASE WHEN typtype='d' THEN 0 ELSE 1 END,
(t.typelem>0)::bool, 1

This takes over 800 secs to complete.
Is this normal, against a database with 385 schemas?



(I am posting to this group for the first time, please be kind ;-)