Creating temporary tables in MySQL Stored Procedure

Question

The following procedure gives me an error when I invoke it using the CALL statement:

CREATE DEFINER=`user`@`localhost` PROCEDURE `emp_performance`(id VARCHA         


        

Answer 1

By default MySQL config variable sql_notes is set to 1.

That means that DROP TEMPORARY TABLE IF EXISTS performance; increments warning_count by one and you get a warning when a stored procedure finishes.

You can set sql_notes variable to 0 in my.cnf or rewrite stored procedure like that:

CREATE DEFINER=`user`@`localhost` PROCEDURE `emp_performance`(id VARCHAR(10))
BEGIN
SET @@session.sql_notes = 0;
DROP TEMPORARY TABLE IF EXISTS performance;
CREATE TEMPORARY TABLE performance AS  
    SELECT time_in, time_out, day FROM attendance WHERE employee_id = id;
SET @@session.sql_notes = 1;
END