{
  "IsDistinct": false,
  "Projections": [
    {
      "Expr": {
        "ColumnName": "dt",
        "OpType": "Column"
      },
      "OpType": "Target"
    },
    {
      "Expr": {
        "WindowSpec": {
          "partitionKeys": [
            {
              "ColumnName": "dt",
              "OpType": "Column"
            }
          ]
        },
        "IsDistinct": false,
        "Signature": "sum",
        "FuncParams": [
          {
            "ColumnName": "xy",
            "OpType": "Column"
          }
        ],
        "OpType": "WindowFunction"
      },
      "OpType": "Target"
    }
  ],
  "Expr": {
    "Relations": [
      {
        "TableName": "sum_example",
        "OpType": "Relation"
      }
    ],
    "OpType": "RelationList"
  },
  "OpType": "Projection"
}