BEGIN;
+UPDATE action.circulation SET parent_circ = NULL WHERE parent_circ
+(SELECT id FROM action.circulation WHERE circ_lib = (SELECT (actor.org_unit_descendants(id)).id from actor.org_unit where shortname = :ou_to_del))
+AND circ_lib NOT IN (SELECT (actor.org_unit_descendants(id)).id from actor.org_unit where shortname = :ou_to_del);
+
DELETE FROM action.circulation WHERE usr IN
(SELECT id FROM actor.usr WHERE home_ou IN (SELECT (actor.org_unit_descendants(id)).id from actor.org_unit where shortname = :ou_to_del));