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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