mysql - MySQL：语法错误，意外'@'，期待'：'

Question

我想动态创建临时表。我将列名作为参数传递给存储过程。

示例：

DELIMITER $$
create procedure sptemp(IN nm varchar(50))
BEGIN

SET @q = CONCAT('CREATE TEMPORARY TABLE temptable    // Error occuring here @q 
             SELECT DISTINCT ', nm ,' AS Col FROM table1');
PREPARE d FROM @q;
EXECUTE d;
DEALLOCATE PREPARE d;
END$$
DELIMITER ;

错误：语法错误，意外'@'，期待'：'

Answer 1

SET @q = CONCAT('CREATE TEMPORARY TABLE IF NOT EXISTS temptable (INDEX(Col)) ENGINE=MyISAM 
AS (SELECT DISTINCT ', nm ,' AS Col FROM table1)');

作为奖励 - 您的 Col 列的索引。