DROP TABLE IF EXISTS items;
SET NAMES utf8mb4;
CREATE TABLE items (
id int PRIMARY KEY AUTO_INCREMENT,
tag_ids text DEFAULT NULL COMMENT "flags 'COLUMN_VECTOR', groonga_type 'Int32'"
) DEFAULT CHARSET=utf8mb4;
INSERT INTO items (tag_ids) VALUES ('[1, -2, 3]');
INSERT INTO items (tag_ids) VALUES ('');
SELECT * FROM items;
id	tag_ids
1	[1,-2,3]
2	[]
DROP TABLE items;
