EVOLUTION-MANAGER

Edit File: column_generated_virtual_add_column.result

DROP TABLE IF EXISTS logs; CREATE TABLE logs ( id INT, record JSON ) ENGINE=Mroonga DEFAULT CHARSET=utf8mb4; INSERT INTO logs(id, record) VALUES (1, '{"level": "info", "message": "start"}'); ALTER TABLE logs ADD COLUMN message VARCHAR(255) GENERATED ALWAYS AS (json_extract(`record`, '$.message')) VIRTUAL; INSERT INTO logs(id, record) VALUES (2, '{"level": "info", "message": "restart"}'); INSERT INTO logs(id, record) VALUES (3, '{"level": "warn", "message": "abort"}'); SELECT * FROM logs; id record message 1 {"level": "info", "message": "start"} "start" 2 {"level": "info", "message": "restart"} "restart" 3 {"level": "warn", "message": "abort"} "abort" DROP TABLE logs;