- Added upgrade script

sql/postgresql/upgrade/upgrade-5.0.3.0.1-5.0.3.0.2.sql

+-- 5.0.2.3.5-5.0.2.3.6.sql
+SELECT acs_log__debug('/packages/intranet-cost/sql/postgresql/upgrade/upgrade-5.0.2.3.5-5.0.2.3.6.sql','');
+
+
+-- Delete a single cost (if we know its ID...)
+create or replace function im_cost__delete (integer)
+returns integer as $$
+DECLARE
+	p_cost_id alias for $1;
+begin
+	-- Update im_hours relationship
+	update	im_hours
+	set	cost_id = null
+	where	cost_id = p_cost_id;
+
+	-- Erase payments related to this cost item
+	delete from im_payments
+	where cost_id = p_cost_id;
+
+	-- Erase the im_cost
+	delete from im_costs
+	where cost_id = p_cost_id;
+
+	-- Erase the im_cost
+	delete from im_biz_objects
+	where object_id = p_cost_id;
+
+	-- Erase the acs_rels entries pointing to this cost item
+	delete	from acs_rels
+	where	object_id_two = p_cost_id;
+	delete	from acs_rels
+	where	object_id_one = p_cost_id;
+
+	delete from acs_permissions 
+	where object_id = p_cost_id;
+
+	-- Erase the object
+	PERFORM acs_object__delete(p_cost_id);
+	return 0;
+end;$$ language 'plpgsql';
+