stored-procedures - mariadb程序phpmyadmin报错

Question

在 PHPmyadmin sql box 中创建存储过程时出现以下错误:

1064 - You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ') BEGIN DECLARE ref_id varchar(10)' at line 1

CREATE PROCEDURE get_tree(IN id varchar)
 BEGIN
 DECLARE ref_id varchar(10);
 DECLARE userid varchar(10);
 SET userid = id;
 SET ref_id='';
 SELECT ref_id into ref_id 
 FROM user WHERE user_id=id ;
 create TEMPORARY  table IF NOT EXISTS temp_table as (select * from user where 1='');
 truncate table temp_table;
 WHILE ref_id <> '' DO
   insert into temp_table select * from user WHERE user_id=userid;
   SET userid = ref_id;
   SET ref_id='';
   SELECT ref_id into ref_id
   FROM user WHERE user_id=userid;
 END WHILE;
 select * from temp_table;
 END

Answer 1

问题是过程参数——没有长度就不能有 varchar。应该是

CREATE PROCEDURE get_tree(IN id varchar(10))
 BEGIN
 ...

(或者你想要的任何长度，但 10 似乎是一个合理的选择)。