sakila
Database
Tables
(current)
Columns
Constraints
Relationships
Orphan Tables
Anomalies
Routines
inventory_in_stock
Parameters
Name
Type
Mode
p_inventory_id
int(11)
IN
Definition
BEGIN DECLARE v_rentals INT; DECLARE v_out INT; #AN ITEM IS IN-STOCK IF THERE ARE EITHER NO ROWS IN THE rental TABLE #FOR THE ITEM OR ALL ROWS HAVE return_date POPULATED SELECT COUNT(*) INTO v_rentals FROM rental WHERE inventory_id = p_inventory_id; IF v_rentals = 0 THEN RETURN TRUE; END IF; SELECT COUNT(rental_id) INTO v_out FROM inventory LEFT JOIN rental USING(inventory_id) WHERE inventory.inventory_id = p_inventory_id AND rental.return_date IS NULL; IF v_out > 0 THEN RETURN FALSE; ELSE RETURN TRUE; END IF; END