{
    "1": {
        "method": "changeColumn",
        "params": [
            "nexus_purchases",
            "ps_name",
            {
                "name": "ps_name",
                "type": "VARCHAR",
                "length": 255,
                "decimals": null,
                "values": [],
                "allow_null": true,
                "default": null,
                "comment": "",
                "unsigned": false,
                "auto_increment": false
            }
        ]
    }
}