{
    "changeSet": [
        {
            "id": "1",
            "author": "John Doe",
            "description": "Initial version",
            "date": "2019-01-01",
            "comment": "Initial version",
            "check": " SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = 'ai_service' AND table_name = 'my_table';",
            "onFail": "SKIP",
            "migrateUp": "CREATE TABLE my_table (id INT PRIMARY KEY, name VARCHAR(255));",
            "migrateDown": "DROP TABLE my_table;"
        }
    ]
}