LIMIT and user variable in MysQL

Problem

日本語 ver

I want to use this query in PROCEDURE.

SET @user_variable = FLOOR(RAND()*10);
INSERT INTO  Table_name (columns_name) VALUES (1) FROM Table_name ORDER BY RAND() LIMIT 1 OFFSET @user_variable;

This query want to substitute 1 for the @user_variable 'th line of columns_name, but this query does not work.
A cause is that LIMIT and OFFSET does not user variable.

Solution
SET @user_variable = FLOOR(RAND()*10);
PREPARE SET_STMT FROM 'INSERT INTO  Table_name (columns_name) VALUES (1) FROM Table_name ORDER BY RAND() LIMIT 1 OFFSET ?;';
 EXECUTE SET_STMT USING @user_variable;

Conclusion, if you want to use user variable with LIMIT or OFFSET, use PREPARE STATMENT.

Reference
http://techtipshoge.blogspot.com/2011/10/limit.html