I'm trying to convert this query to a MySQL function

SET @v1 := (
SELECT  count(id) as count
    FROM  article_category
    where  (title like "About Usd")
        or (title like "About Usd-%"  and  title regexp '[0-9]$')
           ); 
INSERT  INTO `article_category`
    (`title`,`meta_data`,`meta_description`)
    VALUES
    ( IF(@v1 <= 0, "About Usd", CONCAT("About Usd","-",@v1) ), 
      "ddddD",
      "ddddddd" );

This function should return the next available name so I can use it directly in an insert statement:

CREATE FUNCTION `get_next_unique_name`(tabel nvarchar(255),naem nvarchar(255)) RETURNS NVARCHAR(255)
    DETERMINISTIC
BEGIN
 SET @dd = SELECT count(id) as count FROM tabel where (title like naem) or (title like (naem+'-%') and title regexp '[0-9]$');
 RETURN (naem+'-'[email protected]);
END