ठीक है, मैंने इसे समझ लिया और यह काफी सरल था, मूल रूप से प्रत्येक LEFT JOIN
. पर मुझे पास किए गए मापदंडों द्वारा प्रारंभ तिथि को फ़िल्टर करना पड़ा।
मुझे यह भी फ़िल्टर करना था कि क्या छुट्टी स्वीकृत हुई थी, एक Approved_DateTime
और Approved_By
यदि स्वीकृत किया गया था तो फ़ील्ड जहां भरा गया था। साथ ही अवधि की गणना कुछ परिस्थितियों में थोड़ी दूर थी। तो मेरी संग्रहित प्रक्रिया अब इस तरह दिखती है:
DELIMITER $$
USE `test`$$
DROP PROCEDURE IF EXISTS `GetLeaveDates`$$
CREATE DEFINER=`root`@`%` PROCEDURE `GetLeaveDates`(pEmpID INT, pDateFrom DATETIME, pDateTo DATETIME, pApproved BOOLEAN)
BEGIN
SELECT
DATE_FORMAT(a.start_date,'%d/%m/%y') AS start,
CASE WHEN a.am_pm = 1 THEN "AM"
WHEN a.am_pm = 2 THEN "PM"
ELSE "" END AS start_am_pm,
DATE_FORMAT(CASE WHEN pDateTo > MIN(c.start_date) THEN
MIN(c.start_date)
ELSE
pDateTo
END, '%d/%m/%y') AS end,
CASE WHEN c.am_pm = 1 THEN "AM"
WHEN c.am_pm = 2 THEN "PM"
ELSE "" END AS end_am_pm,
CASE WHEN a.am_pm = 0 THEN
CASE WHEN c.am_pm = 0 OR c.am_pm = 2 THEN
DATEDIFF(MIN(c.start_date),a.start_date)+1
WHEN c.am_pm = 1 THEN
DATEDIFF(MIN(c.start_date),a.start_date)+0.5
END
WHEN a.am_pm = 1 THEN
CASE WHEN c.am_pm = 0 OR c.am_pm = 2 THEN
DATEDIFF(MIN(c.start_date),a.start_date)+1
WHEN c.am_pm = 1 THEN
DATEDIFF(MIN(c.start_date),a.start_date)+0.5
END
WHEN a.am_pm = 2 THEN
CASE WHEN c.am_pm = 0 OR c.am_pm = 2 THEN
DATEDIFF(MIN(c.start_date),a.start_date)+0.5
WHEN c.am_pm = 1 THEN
DATEDIFF(MIN(c.start_date),a.start_date)
END
END AS Duration
FROM t AS a
LEFT JOIN t AS b ON a.employee_id=b.employee_id AND a.start_date = ADDDATE(b.start_date,1) AND ISNULL(b.approved_datetime) <> pApproved AND b.start_date BETWEEN pDateFrom AND pDateTo
LEFT JOIN t AS c ON a.employee_id=c.employee_id AND a.start_date <= c.start_date AND ISNULL(c.approved_datetime) <> pApproved AND c.start_date BETWEEN pDateFrom AND pDateTo
LEFT JOIN t AS d ON c.employee_id=d.employee_id AND c.start_date = ADDDATE(d.start_date,-1) AND ISNULL(d.approved_datetime) <> pApproved AND d.start_date BETWEEN pDateFrom AND pDateTo
WHERE b.start_date IS NULL AND c.start_date IS NOT NULL AND d.start_date IS NULL
AND a.EMPLOYEE_ID = pEmpID
AND a.START_DATE BETWEEN pDateFrom AND pDateTo
AND ISNULL(a.approved_datetime) <> pApproved
AND a.start_date BETWEEN pDateFrom AND pDateTo
GROUP BY a.employee_id, a.start_date
; END$$
DELIMITER ;