CREATE OR REPLACE FUNCTION transactions.opening_inventory_exists(_office_id integer)
RETURNS boolean
LANGUAGE plpgsql
STABLE
AS $function$
BEGIN
IF EXISTS
(
SELECT 1
FROM transactions.transaction_master
WHERE book = 'Opening.Inventory'
AND office_id = _office_id
) THEN
RETURN true;
END IF;
RETURN false;
END
$function$