How to fix "A comma or a closing bracket was expected"? - mysql

Question

I get "A comma or a closing bracket was expected" error when trying to execute this SQL code:
CREATE TABLE `player_vehicles` (
`#` int(11) NOT NULL,
`steam` varchar(50) DEFAULT NULL,
`citizenid` varchar(50) DEFAULT NULL,
`vehicle` varchar(50) DEFAULT NULL,
`hash` varchar(50) DEFAULT NULL,
`mods` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL,
`plate` varchar(50) NOT NULL,
`fakeplate` varchar(50) DEFAULT NULL,
`garage` varchar(50) DEFAULT NULL,
`fuel` int(11) DEFAULT 100,
`engine` float DEFAULT 1000,
`body` float DEFAULT 1000,
`state` int(11) DEFAULT 1,
`depotprice` int(11) NOT NULL DEFAULT 0,
`drivingdistance` int(50) DEFAULT NULL,
`status` text DEFAULT NULL,
`health` longtext NOT NULL '[{"value":100,"part":"electronics"},{"value":100,"part":"fuelinjector"},{"value":100,"part":"brakes"},
{"value":100,"part":"radiator"},{"value":100,"part":"driveshaft"},{"value":100,"part":"transmission"},{"value":100,"part":"clutch"}]'
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
Error message:
A comma or a closing bracket was expected. (near "'[{"value":100,"part":"electronics"},{"value":100,"part":"fuelinjector"},{"value":100,"part":"brakes"},{"value":100,"part":"radiator"},{"value":100,"part":"driveshaft"},{"value":100,"part":"transmission"},{"value":100,"part":"clutch"}]'" at position 816)
Can someone please help, I can't figure this out?

Answer 1

It seems like you want to use a string as a default for your longtext column, but you are missing the DEFAULT keyword.
But it won't work anyway. https://dev.mysql.com/doc/refman/8.0/en/blob.html says:
BLOB and TEXT columns cannot have DEFAULT values.
If I add the DEFAULT keyword to your example, and try it in the MySQL client, I get this error:
ERROR 1101 (42000): BLOB, TEXT, GEOMETRY or JSON column 'health' can't have a default value
MariaDB, a fork of MySQL, added the capability to add a DEFAULT value to a BLOB or TEXT column in MariaDB 10.2.1, but this is not supported in MySQL.

Answer 2

If you need to assign some default value to LONGTEXT column then use BEFORE INSERT trigger.
CREATE TABLE test (id INT, txt LONGTEXT NOT NULL);
CREATE TRIGGER tr_bi_setdef
BEFORE INSERT ON test
FOR EACH ROW
SET NEW.txt = COALESCE(NEW.txt, '["default value"]');
INSERT INTO test VALUES (1, '["specified value"]'), (2, NULL);
INSERT INTO test (id) VALUES (3);
SELECT * FROM test;
id | txt
-: | :------------------
1 | ["specified value"]
2 | ["default value"]
3 | ["default value"]
db<>fiddle here