DELIMITER $$

DROP PROCEDURE IF EXISTS `Edit_table` $$
CREATE PROCEDURE `Edit_table` (in_db_nm varchar(20),in_tbl_nm varchar(20),in_your_query varchar(200))
DETERMINISTIC
BEGIN

DECLARE var_table_count INT;

select count(*) INTO @var_table_count from information_schema.TABLES where  TABLE_NAME=in_tbl_nm and TABLE_SCHEMA=in_db_nm;
IF (@var_table_count > 0) THEN
  SET @in_your_query = in_your_query;
  #SELECT @in_your_query;
  PREPARE my_query FROM @in_your_query;
  EXECUTE my_query;

ELSE
  select "Table Not Found";
END IF;

END $$
DELIMITER ;