{
    "1": {
        "method": "changeColumn",
        "params": [
            "downloads_files",
            "file_size",
            {
                "name": "file_size",
                "type": "BIGINT",
                "length": 20,
                "default": 0,
                "allow_null": false
            }
        ]
    },
    "2": {
        "method": "changeColumn",
        "params": [
            "downloads_files_records",
            "record_size",
            {
                "name": "record_size",
                "type": "BIGINT",
                "length": 20,
                "default": 0,
                "allow_null": false
            }
        ]
    }
}