mysql调用存储过程出现Illegal mix of collations异常

mysql调用存储过程出现Illegal mix of collations错误
先上存储过程

SQL code

DELIMITER $$
CREATE PROCEDURE `proce_test`(admin_name VARCHAR(32))
BEGIN
    SELECT create_time FROM information_schema.TABLES AS t WHERE t.table_name=admin_name LIMIT 1;
END

当我调用它的时候，出现错误

SQL code

Query: call proce_test("LOG_ALWW")

Error Code: 1267
Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8_unicode_ci,IMPLICIT) for operation '='

经检查，information_schema.TABLES编码为UTF-8，而且，如果我将“SELECT create_time FROM information_schema.TABLES AS t WHERE t.table_name=admin_name LIMIT 1;”改为查询当前数据库里的表(也是utf-8编码)数据时，完全没有问题。
百思不得其解，请大家支支招

------解决方案--------------------


CREATE PROCEDURE `proce_test`(admin_name VARCHAR(32) charset utf8)试试