Create temporary table inside a procedure - mysql

Question

Here is the error I get when I try to run the code below.
I spent a day on mySQL tutorials + forums without any success.
DROP PROCEDURE IF EXISTS update_end_date_dwh_dimension_product;
delimiter $$
CREATE PROCEDURE update_end_date_dwh_dimension_product()
BEGIN
DROP TEMPORARY TABLE IF EXISTS __temp_BI__;
CREATE TEMPORARY TABLE __temp_BI__
SELECT dp.sku, dp.start_date
FROM dwh_dimension_product dp
ORDER BY dp.sku, dp.start_date;
DECLARE end_loop BOOLEAN DEFAULT TRUE;
DECLARE sku1_ VARCHAR(50);
DECLARE sku2_ VARCHAR(50);
DECLARE start_date1_ TIMESTAMP;
DECLARE start_date2_ TIMESTAMP;
DECLARE cursor_temp CURSOR
FOR select * from __temp_BI__;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET end_loop = FALSE;
OPEN cursor_temp;
FETCH cursor_temp INTO sku1_, start_date1_;
while_label: WHILE (end_loop) DO
IF end_loop = FALSE THEN
LEAVE while_label;
END IF;
FETCH cursor_temp INTO sku2_, start_date2_;
while_label2: WHILE (sku1_ = sku2_) DO
UPDATE dwh_dimension_product dp1
SET dp1.end_date = DATE_SUB(start_date2_, INTERVAL 1 SECOND)
WHERE dp1.sku = sku1_
AND dp1.start_date = start_date1_;
SET sku1_ = sku2_;
SET start_date1_ = start_date2_;
FETCH cursor_temp INTO sku2_, start_date2_;
IF end_loop = FALSE THEN
LEAVE while_label2;
END IF;
END WHILE;
UPDATE dwh_dimension_product dp2
SET dp2.end_date = NULL
WHERE dp2.sku = sku1_
AND dp2.start_date = start_date1_;
SET sku1_ = sku2_;
SET start_date1_ = start_date2_;
END WHILE;
CLOSE cursor_temp;
DROP TABLE IF EXISTS __temp_BI__;
END $$
delimiter ;
If I put this following code outside the procedure() it works
DROP TEMPORARY TABLE IF EXISTS __temp_BI__;
CREATE TEMPORARY TABLE __temp_BI__
SELECT dp.sku, dp.start_date
FROM dwh_dimension_product dp
ORDER BY dp.sku, dp.start_date;
Thank you for your advice.