MySQL

MySQL: Script to Create a Calendar

Copied and tweaked from Github

https://gist.github.com/bryhal/4129042

DROP TABLE IF EXISTS time_dimension;
CREATE TABLE time_dimension (
id INTEGER PRIMARY KEY, — year*10000+month*100+day
db_date DATE NOT NULL,
year INTEGER NOT NULL,
month INTEGER NOT NULL, — 1 to 12
day INTEGER NOT NULL, — 1 to 31
quarter INTEGER NOT NULL, — 1 to 4
week INTEGER NOT NULL, — 1 to 52/53
day_name VARCHAR(9) NOT NULL, — ‘Monday’, ‘Tuesday’…
month_name VARCHAR(9) NOT NULL, — ‘January’, ‘February’…
holiday_flag CHAR(1) DEFAULT ‘f’ CHECK (holiday_flag in (‘t’, ‘f’)),
weekend_flag CHAR(1) DEFAULT ‘f’ CHECK (weekday_flag in (‘t’, ‘f’)),
event VARCHAR(50),
UNIQUE td_ymd_idx (year,month,day),
UNIQUE td_dbdate_idx (db_date)

) Engine=MyISAM;

DROP PROCEDURE IF EXISTS fill_date_dimension;
DELIMITER //
CREATE PROCEDURE fill_date_dimension(IN startdate DATE,IN stopdate DATE)
BEGIN
DECLARE currentdate DATE;
SET currentdate = ‘2019-01-01’;
WHILE currentdate < ‘2030-12-31′ DO
INSERT INTO time_dimension VALUES (
YEAR(currentdate)*10000+MONTH(currentdate)*100 + DAY(currentdate),
currentdate,
YEAR(currentdate),
MONTH(currentdate),
DAY(currentdate),
QUARTER(currentdate),
WEEKOFYEAR(currentdate),
DATE_FORMAT(currentdate,’%W’),
DATE_FORMAT(currentdate,’%M’),
‘f’,
CASE DAYOFWEEK(currentdate) WHEN 1 THEN ‘t’ WHEN 7 then ‘t’ ELSE ‘f’ END,
NULL);
SET currentdate = ADDDATE(currentdate,INTERVAL 1 DAY);
END WHILE;
END
//
DELIMITER ;

TRUNCATE TABLE time_dimension;

CALL fill_date_dimension(‘1-01-01′,’2015-01-01’);
OPTIMIZE TABLE time_dimension;

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