stored procedures - use a variable for table name in mysql sproc

Question

I'm trying to pass a table name into my mysql stored procedure to use this sproc to select off of different tables but it's not working...

this is what I"m trying:

CREATE PROCEDURE `usp_SelectFromTables`(
 IN TableName varchar(100)
)
BEGIN
        SELECT * FROM @TableName;
END

I've also tried it w/o the @ sign and that just tells me that TableName doesn't exist...which I know :)

Answer 1

SET @cname:='jello';
SET @vname:='dwb';
SET @sql_text = concat('select concept_id,concept_name,',@vname,' from enc2.concept a JOIN enc2.ratings b USING(concept_id) where concept_name like (''%',@cname,'%'') and 3 is not null order by 3 asc');

PREPARE stmt FROM @sql_text;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;