{
    "1": {
        "method": "changeIndex",
        "params": [
            "forums_archive_posts",
            "archive_topic_id",
            {
                "type": "key",
                "name": "archive_topic_id",
                "columns": [
                    "archive_topic_id",
                    "archive_content_date",
                    "archive_id",
                    "archive_queued"
                ],
                "length": [
                    null,
                    null,
                    null,
                    null
                ]
            }
        ]
    }
}