Loop through two dates to get values - mysql

Question

I have a table that holds entries when the value changes, however I now have a need to get the value for each day between two dates.
So in the database I have the following:
2015-10-17 25
2015-10-12 20
2015-10-01 5
What I need is to get the values for the entire month
2015-10-01 5
2015-10-02 5
....
2015-10-12 20
2015-10-13 20
How would I achieve this? I have the below code
http://www.sqlfiddle.com/#!2/ca447e/1/0
CREATE PROCEDURE sp_GetMonthVals(IN StartDate DATETIME, IN EndDate DATETIME)
BEGIN
DECLARE CurrentDate DATETIME;
SET #CurrentDate = StartDate;
label1: WHILE #CurrentDate < #EndDate DO
SELECT #CurrentDate, DVal FROM Table1 WHERE MDate <= #CurrentDate ORDER BY MDate DESC LIMIT 1;
SET #CurrentDate = DATE_ADD(CurrentDate, INTERVAL 1 DAY);
END WHILE label1;
END;
CREATE TABLE Table1
(`id` int, `MDate` varchar(10), `DVal` int)
;
INSERT INTO Table1
(`id`, `MDate`, `DVal`)
VALUES
(1, '2015-10-17', 25),
(2, '2015-10-12', 20),
(3, '2015-10-01', 5)
;
CALL sp_GetMonthVals('2015-10-01', '2015-10-31');

Answer 1

I have managed to achieve this using the below, if anyone can improve the query then I'll accept their answer
DROP PROCEDURE IF EXISTS sp_GetMonthVals;
DELIMITER //
CREATE PROCEDURE sp_GetMonthVals(IN StartDate DATETIME, IN EndDate DATETIME)
BEGIN
DECLARE CurrentDate DATETIME;
SET #CurrentDate = StartDate;
DROP TABLE IF EXISTS _tmpMonthVals;
CREATE TABLE _tmpMonthVals (`MDate` DATETIME, `DVal` int);
label1: WHILE #CurrentDate < EndDate DO
INSERT INTO _tmpMonthVals SELECT #CurrentDate, DVal FROM Table1 WHERE MDate <= #CurrentDate ORDER BY MDate DESC LIMIT 1;
SET #CurrentDate = DATE_ADD(#CurrentDate, INTERVAL 1 DAY);
END WHILE label1;
SELECT * FROM _tmpMonthVals;
END//
DELIMITER ;
CREATE TABLE IF NOT EXISTS Table1
(`id` int, `MDate` DATETIME, `DVal` int)
;
INSERT INTO Table1
(`id`, `MDate`, `DVal`)
VALUES
(1, '2015-10-17', 25),
(2, '2015-10-12', 20),
(3, '2015-10-01', 5);
CALL sp_GetMonthVals('2015-10-01', '2015-10-31');