{
    "1": {
        "method": "changeColumn",
        "params": [
            "blog_lastinfo",
            "blog_tag_cloud",
            {
                "name": "blog_tag_cloud",
                "type": "MEDIUMTEXT",
                "default": null,
                "allow_null": true
            }
        ]
    },
    "2": {
        "method": "update",
        "params": [
            "blog_lastinfo",
            {
                "blog_tag_cloud": ""
            }
        ]
    }
}