{
  "Cache": "",
  "Comments": null,
  "Distinct": "",
  "Hints": "",
  "SelectExprs": [
    {
      "Expr": {
        "Type": 1,
        "Val": "MQ=="
      },
      "As": ""
    }
  ],
  "From": [
    {
      "Expr": {
        "Name": "dual",
        "Qualifier": ""
      },
      "Partitions": null,
      "As": "",
      "Hints": null
    }
  ],
  "Where": null,
  "GroupBy": null,
  "Having": null,
  "OrderBy": null,
  "Limit": null,
  "Lock": ""
}