Thank you for your speedy reply.
I tried on your way. But it gives *error* as "*Dynamic SQL is not allowed in
stored function or trigger*". I'm using *MySql 5* as my sever. How can I
solve that.
thank you
On Mon, Mar 15, 2010 at 11:43 PM, Gavin Towey <gto...@ffn.com> wrote:
> You'll have to do something like this:
>
> SET @sql := CONCAT('select ',columnname,' into retval from user where
> ID=',id);
> PREPARE mySt FROM @sql;
> EXECUTE mySt;
>
>
>
> -----Original Message-----
> From: chamila gayan [mailto:cgcham...@gmail.com]
> Sent: Monday, March 15, 2010 12:58 AM
> To: mysql@lists.mysql.com
> Subject: udf return column name not value
>
> CREATE FUNCTION getcolumnvalue(id int,columnname varchar(30))
> RETURNS varchar(50) DETERMINISTIC
> READS SQL DATA
> begin
> declare retval varchar(50);
> return retval;
> end;
>
> I want get value of related column but it return column name.
> ex:- ('tom' what I want but it return 'name')
> plz tell what the wrong of this
>
> thank you
>
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