Functionality as the CHECK Constraints
of other products would be appropriate in this particular case, but MySQL does not support this feature. Usually triggers are often used to achieve what you need.
In the following example, very basic, all columns are validated on the trigger and when you try to insert 50 records, it takes a few milliseconds. This is just a proof of concept and it would be convenient for you to perform a test on a production-like environment.
/*Table structure for table `table_variables` */
DROP TABLE IF EXISTS `table_variables`;
CREATE TABLE `table_variables` (
`id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
`variable0` TINYINT(4) DEFAULT NULL,
`variable1` TINYINT(4) DEFAULT NULL,
`variable2` TINYINT(4) DEFAULT NULL,
`variable3` TINYINT(4) DEFAULT NULL,
`variable4` TINYINT(4) DEFAULT NULL,
`variable5` TINYINT(4) DEFAULT NULL,
`variable6` TINYINT(4) DEFAULT NULL,
`variable7` TINYINT(4) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=INNODB;
/* Trigger structure for table `table_variables` */
DELIMITER $$
/*!50003 DROP TRIGGER*//*!50032 IF EXISTS */ /*!50003 `trg_check_bi` */$$
CREATE TRIGGER `trg_check_bi` BEFORE INSERT ON `table_variables`
FOR EACH ROW
BEGIN
DECLARE msg VARCHAR(255);
DECLARE _min, _max TINYINT DEFAULT -49;
SET _max := _max * (-1);
SET @max = _max;
IF (new.`variable0` NOT BETWEEN _min AND _max) THEN
SET msg := 'Error: variable0 out of range.';
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = msg;
END IF;
IF (new.`variable1` NOT BETWEEN _min AND _max) THEN
SET msg := 'Error: variable1 out of range.';
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = msg;
END IF;
IF (new.`variable2` NOT BETWEEN _min AND _max) THEN
SET msg := 'Error: variable2 out of range.';
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = msg;
END IF;
IF (new.`variable3` NOT BETWEEN _min AND _max) THEN
SET msg := 'Error: variable3 out of range.';
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = msg;
END IF;
IF (new.`variable4` NOT BETWEEN _min AND _max) THEN
SET msg := 'Error: variable4 out of range.';
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = msg;
END IF;
IF (new.`variable5` NOT BETWEEN _min AND _max) THEN
SET msg := 'Error: variable5 out of range.';
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = msg;
END IF;
IF (new.`variable6` NOT BETWEEN _min AND _max) THEN
SET msg := 'Error: variable6 out of range.';
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = msg;
END IF;
IF (new.`variable7` NOT BETWEEN _min AND _max) THEN
SET msg := 'Error: variable7 out of range.';
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = msg;
END IF;
END $$
DELIMITER ;
INSERT `table_variables` (
`variable0`,
`variable1`,
`variable2`,
`variable3`,
`variable4`,
`variable5`,
`variable6`,
`variable7`)
VALUES
(25, 46, 6, 42, 46, -42, -6, 47),
(11, -37, 26, -3, -44, 37, -28, -4),
(14, 33, -21, 40, 19, 23, 10, 29),
(-32, 1, -47, 10, 42, 36, 5, -34),
(-38, -40, -35, -6, 27, 7, 4, -49),
(-14, 29, 41, -29, -23, 22, 31, 41),
(-34, -49, 5, 27, -27, 30, -14, -11),
(36, -30, -14, -27, -44, 10, 33, -12),
(-10, 34, -42, 29, 29, 10, 11, -21),
(6, 45, -36, 29, 7, -3, 13, 25),
(37, -35, -40, -47, 32, -42, 38, -27),
(-4, 12, 24, 36, -39, 41, -22, 12),
(-19, 14, -18, 16, -15, 27, 31, 28),
(-3, -49, 11, -44, -8, 42, -8, -21),
(-31, -44, 21, -6, -42, -47, 38, -11),
(-21, -23, -1, 17, 36, -16, -40, -3),
(-43, 40, -16, 48, 43, 22, 29, 32),
(25, -21, -32, -47, 6, 28, -28, 23),
(-45, -48, 42, 11, -22, 4, 36, 24),
(-39, -21, -34, 39, -47, -10, 46, 16),
(-10, -48, 37, -15, -37, 8, 5, -47),
(-4, -25, 32, -8, 11, 31, -25, 26),
(-40, -30, 20, 44, 12, -22, -1, 16),
(32, -33, -14, -22, -19, 20, 13, -43),
(-10, 31, 39, -44, 8, 23, 44, 3),
(32, 3, -31, -15, -32, 34, 20, 47),
(30, -42, 44, 5, 41, 43, 44, 43),
(32, -16, -31, 43, -34, 45, -14, 37),
(-15, -38, 3, -17, -46, -31, 33, 12),
(13, -22, 0, 18, 42, 9, -31, -33),
(-23, 32, -16, -27, -38, 38, -40, 30),
(26, -9, 23, -4, -38, -31, 9, -11),
(-31, 25, -24, 48, -30, 48, -10, -47),
(41, 1, 31, 4, -21, 30, -33, -9),
(8, 16, 7, 39, 25, -38, -23, -47),
(-18, 1, 13, 13, -25, -14, -43, -25),
(-47, -11, 38, -23, 15, 0, 3, -31),
(-20, 44, 37, 4, -40, 33, 39, 47),
(-29, -40, 35, -46, 6, 21, 41, -4),
(4, -16, -42, -16, -1, -6, 23, -13),
(14, -40, 5, 0, 32, 16, 34, -24),
(24, 45, 7, -49, -22, -12, -43, -29),
(32, 1, -41, 38, -28, -11, -17, -5),
(-21, -39, 13, 37, -1, 32, 17, 40),
(-1, 25, -20, -26, -22, 18, 8, 37),
(13, 4, 32, 1, -41, 36, -38, 47),
(4, 26, -29, 25, -33, 5, -24, 15),
(-1, -1, 47, -4, -15, -11, 36, -29),
(-9, -7, 42, -14, -48, 47, 39, 3),
(-31, -20, 91, 17, -89, 4, -14, 22);