{
    "1": {
        "method": "addIndex",
        "params": [
            "gallery_images",
            {
                "type": "key",
                "name": "udate",
                "columns": [
                    "image_category_id",
                    "image_album_id",
                    "image_approved",
                    "image_updated"
                ],
                "length": [
                    null,
                    null,
                    null,
                    null
                ]
            }
        ]
    }
}