{
  "IsDistinct": false,
  "Projections": [
    {
      "Expr": {
        "ColumnName": "dt",
        "OpType": "Column"
      },
      "OpType": "Target"
    },
    {
      "Expr": {
        "ColumnName": "dt2",
        "OpType": "Column"
      },
      "OpType": "Target"
    },
    {
      "Expr": {
        "WindowSpec": {
          "partitionKeys": [
            {
              "Signature": "round",
              "FuncParams": [
                {
                  "ColumnName": "dt",
                  "OpType": "Column"
                }
              ],
              "OpType": "Function"
            },
            {
              "ColumnName": "dt2",
              "OpType": "Column"
            }
          ],
          "sortSpecs": [
            {
              "SortKey": {
                "Signature": "ceil",
                "FuncParams": [
                  {
                    "ColumnName": "dt",
                    "OpType": "Column"
                  }
                ],
                "OpType": "Function"
              },
              "IsAsc": true,
              "IsNullFirst": false
            }
          ],
          "windowFrame": {
            "unit": "ROW",
            "startBound": {
              "boundType": "UNBOUNDED_PRECEDING"
            }
          }
        },
        "IsDistinct": false,
        "Signature": "sum",
        "FuncParams": [
          {
            "ColumnName": "xy",
            "OpType": "Column"
          }
        ],
        "OpType": "WindowFunction"
      },
      "OpType": "Target"
    }
  ],
  "Expr": {
    "Relations": [
      {
        "TableName": "sum_example",
        "OpType": "Relation"
      }
    ],
    "OpType": "RelationList"
  },
  "OpType": "Projection"
}