现有app_user表,字段有id,name,phone,nickname,password,invite_code(邀请码,为用户的id),要求使用存储过程查询出用户的所有上级
时间: 2024-06-09 19:04:59 浏览: 112
假设用户的上级是通过邀请码进行关联的,那么可以通过以下存储过程实现查询:
```sql
DELIMITER //
CREATE PROCEDURE getSuperiors(IN userId INT)
BEGIN
DECLARE superiorId INT;
DECLARE superiorName VARCHAR(255);
DECLARE done INT DEFAULT FALSE;
DECLARE cur CURSOR FOR SELECT invite_code FROM app_user WHERE id = userId;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
CREATE TEMPORARY TABLE IF NOT EXISTS temp_superiors(
id INT PRIMARY KEY AUTO_INCREMENT,
name VARCHAR(255),
userId INT
);
OPEN cur;
read_loop: LOOP
FETCH cur INTO superiorId;
IF done THEN
LEAVE read_loop;
END IF;
SELECT name INTO superiorName FROM app_user WHERE id = superiorId;
INSERT INTO temp_superiors(name, userId) VALUES(superiorName, superiorId);
SET userId = superiorId;
END LOOP;
CLOSE cur;
SELECT * FROM temp_superiors;
DROP TEMPORARY TABLE IF EXISTS temp_superiors;
END //
DELIMITER ;
```
调用该存储过程,传入用户的id即可查询该用户的所有上级:
```sql
CALL getSuperiors(10);
```
其中,临时表 `temp_superiors` 用于存储查询结果,通过游标循环查询该用户的上级,并将上级信息插入临时表中。完成查询后,返回临时表结果,并删除该临时表。
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