将购票和取消订单改为存储过程和触发器

Project/Manager/data_source/db_user.sql

@@ -13,5 +13,6 @@ GRANT ALL PRIVILEGES ON ServiceDatabase.Airports TO 'serviceAgent'@'%';
 GRANT ALL PRIVILEGES ON ServiceDatabase.Tickets TO 'serviceAgent'@'%';
 GRANT SELECT, UPDATE (First_class_seats_remaining, Business_class_seats_remaining, Economy_class_seats_remaining)
 ON ServiceDatabase.Flights TO 'serviceAgent'@'%';
+GRANT EXECUTE ON PROCEDURE ServiceDatabase.AddPassengerAndTicket TO 'serviceAgent'@'%';
 
 FLUSH PRIVILEGES;

Project/Manager/data_source/init_service_db.sql

@@ -68,4 +68,64 @@ CREATE TABLE ServiceDatabase.Tickets (
     FOREIGN KEY (PassengerID) REFERENCES Passengers(ID) ON DELETE CASCADE,
     FOREIGN KEY (OrderID) REFERENCES Orders(ID) ON DELETE CASCADE,
     CHECK (Seat_class IN ('First Class', 'Business Class', 'Economy Class'))
-);
+);
+
+USE ServiceDatabase;
+
+DELIMITER //
+
+CREATE PROCEDURE AddPassengerAndTicket(
+    IN p_passenger_id VARCHAR(18),
+    IN p_name VARCHAR(255),
+    IN p_phone_number BIGINT,
+    IN p_seat_class VARCHAR(255),
+    IN p_flight_id VARCHAR(255),
+    IN p_price DECIMAL(7, 2),
+    IN p_order_id INT
+)
+BEGIN
+    -- 插入或更新乘客信息
+    INSERT INTO Passengers (ID, Name, Phone_number)
+    VALUES (p_passenger_id, p_name, p_phone_number)
+    ON DUPLICATE KEY UPDATE Name=VALUES(Name), Phone_number=VALUES(Phone_number);
+
+    -- 更新航班座位数
+    IF p_seat_class = 'First Class' THEN
+        UPDATE Flights
+        SET First_class_seats_remaining = First_class_seats_remaining - 1
+        WHERE ID = p_flight_id;
+    ELSEIF p_seat_class = 'Business Class' THEN
+        UPDATE Flights
+        SET Business_class_seats_remaining = Business_class_seats_remaining - 1
+        WHERE ID = p_flight_id;
+    ELSEIF p_seat_class = 'Economy Class' THEN
+        UPDATE Flights
+        SET Economy_class_seats_remaining = Economy_class_seats_remaining - 1
+        WHERE ID = p_flight_id;
+    END IF;
+
+    -- 插入机票信息
+    INSERT INTO Tickets (Price, FlightID, Seat_class, PassengerID, OrderID)
+    VALUES (p_price, p_flight_id, p_seat_class, p_passenger_id, p_order_id);
+END //
+
+CREATE TRIGGER restore_seats
+BEFORE DELETE ON Tickets
+FOR EACH ROW
+BEGIN
+    IF OLD.Seat_class = 'First Class' THEN
+        UPDATE Flights
+        SET First_class_seats_remaining = First_class_seats_remaining + 1
+        WHERE ID = OLD.FlightID;
+    ELSEIF OLD.Seat_class = 'Business Class' THEN
+        UPDATE Flights
+        SET Business_class_seats_remaining = Business_class_seats_remaining + 1
+        WHERE ID = OLD.FlightID;
+    ELSEIF OLD.Seat_class = 'Economy Class' THEN
+        UPDATE Flights
+        SET Economy_class_seats_remaining = Economy_class_seats_remaining + 1
+        WHERE ID = OLD.FlightID;
+    END IF;
+END //
+
+DELIMITER ;