{
    "lane": "C",
    "success": true,
    "DDL": 2,
    "DML": 0,
    "HTTP": 0,
    "original_rows": 1775,
    "original20_sha256": "1fd0eef856df45a66f6c2f34c11022d9e8a65c960df641edcdf0a583ec5ff2a3",
    "original_metadata_objects_unchanged": true,
    "new_column": {
        "name": "IMG",
        "characters": 256,
        "bytes": 1024,
        "character_unit": "CHAR",
        "nullable": false,
        "default": "",
        "comment": "课程图片(OSS地址)"
    },
    "all_original_IMG_empty": true,
    "independent_new_PDO": true
}