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START TRANSACTION
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DROP DATABASE IF EXISTS `base`
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CREATE DATABASE IF NOT EXISTS `base`
DEFAULT CHARACTER SET `latin1`
DEFAULT COLLATE `latin1_general_ci`
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DROP TABLE IF EXISTS `test`
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CREATE TABLE IF NOT EXISTS `test`
( `id` integer unsigned NOT NULL auto_increment primary key,
`start_date` datetime NOT NULL,
`end_date` datetime NOT NULL,
`steps` integer unsigned NOT NULL
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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DROP TABLE IF EXISTS `split`
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CREATE TABLE `split` LIKE `test`
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describe `split`
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+------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+--------------+------+-----+---------+----------------+
| id | int unsigned | NO | PRI | NULL | auto_increment |
| start_date | datetime | NO | | NULL | |
| end_date | datetime | NO | | NULL | |
| steps | int unsigned | NO | | NULL | |
+------------+--------------+------+-----+---------+----------------+
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drop procedure if exists `trait`
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create procedure `trait` ()
DETERMINISTIC
NO SQL
BEGIN
DECLARE _start DATETIME DEFAULT NULL;
DECLARE _end DATETIME DEFAULT NULL;
DECLARE _step INTEGER DEFAULT NULL;
DECLARE _inter DATETIME DEFAULT NULL;
DECLARE _nbre INTEGER DEFAULT NULL;
DECLARE _loop INTEGER DEFAULT NULL;
DECLARE _fin INTEGER DEFAULT 1;
DECLARE _tab CURSOR FOR SELECT `start_date`,`end_date`,`steps` FROM `test`;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET _fin = 0;
OPEN _tab;
FETCH _tab INTO _start, _end, _step;
SET _inter = date_format(_start,'%y-%m-%d %H:%i:59');
WHILE (_fin)
DO
SET _nbre = TIMESTAMPDIFF(MINUTE,date_format(_start,'%y-%m-%d %H:%i:00'),date_format(_end ,'%y-%m-%d %H:%i:00')) + 1;
SET _loop = _nbre;
WHILE (_loop > 0)
DO
IF (_loop = 1) THEN SET _inter = _end;
ELSE SET _inter = date_format(_start,'%y-%m-%d %H:%i:59');
END IF;
INSERT INTO `split` (`start_date`,`end_date`,`steps`) VALUE (_start,_inter,_step/_nbre);
SET _start = DATE_ADD(DATE_FORMAT(_start,'%y-%m-%d %H:%i:00'), INTERVAL 1 MINUTE);
SET _loop = _loop - 1;
END WHILE;
FETCH _tab INTO _start, _end, _step;
END WHILE;
CLOSE _tab;
END
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INSERT INTO `test` (`start_date`,`end_date`,`steps`) VALUES
('2021-01-01 13:01:30','2021-01-01 13:05:15',500)
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CALL trait()
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select * from `test`
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+----+---------------------+---------------------+-------+
| id | start_date | end_date | steps |
+----+---------------------+---------------------+-------+
| 1 | 2021-01-01 13:01:30 | 2021-01-01 13:05:15 | 500 |
+----+---------------------+---------------------+-------+
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select * from `split`
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+----+---------------------+---------------------+-------+
| id | start_date | end_date | steps |
+----+---------------------+---------------------+-------+
| 1 | 2021-01-01 13:01:30 | 2021-01-01 13:01:59 | 100 |
| 2 | 2021-01-01 13:02:00 | 2021-01-01 13:02:59 | 100 |
| 3 | 2021-01-01 13:03:00 | 2021-01-01 13:03:59 | 100 |
| 4 | 2021-01-01 13:04:00 | 2021-01-01 13:04:59 | 100 |
| 5 | 2021-01-01 13:05:00 | 2021-01-01 13:05:15 | 100 |
+----+---------------------+---------------------+-------+
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truncate `test`
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truncate `split`
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INSERT INTO `test` (`start_date`,`end_date`,`steps`) VALUES
('2021-08-11 19:04:40','2021-08-11 19:04:45',11),
('2021-08-11 19:04:45','2021-08-11 19:04:50',10),
('2021-08-11 19:04:50','2021-08-11 19:04:55',10),
('2021-08-11 19:04:55','2021-08-11 19:05:01',11)
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CALL trait()
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select * from `test`
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+----+---------------------+---------------------+-------+
| id | start_date | end_date | steps |
+----+---------------------+---------------------+-------+
| 1 | 2021-08-11 19:04:40 | 2021-08-11 19:04:45 | 11 |
| 2 | 2021-08-11 19:04:45 | 2021-08-11 19:04:50 | 10 |
| 3 | 2021-08-11 19:04:50 | 2021-08-11 19:04:55 | 10 |
| 4 | 2021-08-11 19:04:55 | 2021-08-11 19:05:01 | 11 |
+----+---------------------+---------------------+-------+
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select * from `split`
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+----+---------------------+---------------------+-------+
| id | start_date | end_date | steps |
+----+---------------------+---------------------+-------+
| 1 | 2021-08-11 19:04:40 | 2021-08-11 19:04:45 | 11 |
| 2 | 2021-08-11 19:04:45 | 2021-08-11 19:04:50 | 10 |
| 3 | 2021-08-11 19:04:50 | 2021-08-11 19:04:55 | 10 |
| 4 | 2021-08-11 19:04:55 | 2021-08-11 19:04:59 | 6 |
| 5 | 2021-08-11 19:05:00 | 2021-08-11 19:05:01 | 6 |
+----+---------------------+---------------------+-------+
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COMMIT
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