{
    "1": {
        "method": "addIndex",
        "params": [
            "core_edit_history",
            {
                "type": "key",
                "name": "edit_log",
                "columns": [
                    "class",
                    "comment_id",
                    "time"
                ],
                "length": [
                    250,
                    null,
                    null
                ]
            }
        ]
    }
}