objectstack/packages/spec/json-schema/data/WindowFunctionNode.json at 8ae3d928f9c95dd320e89d8629a52085fc3d2d73 · objectstack-ai/objectstack · GitHub

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{
  "$ref": "#/definitions/WindowFunctionNode",
  "definitions": {
    "WindowFunctionNode": {
      "type": "object",
      "properties": {
        "function": {
          "type": "string",
          "enum": [
            "row_number",
            "rank",
            "dense_rank",
            "percent_rank",
            "lag",
            "lead",
            "first_value",
            "last_value",
            "sum",
            "avg",
            "count",
            "min",
            "max"
          ],
          "description": "Window function name"
        },
        "field": {
          "type": "string",
          "description": "Field to operate on (for aggregate window functions)"
        },
        "alias": {
          "type": "string",
          "description": "Result column alias"
        },
        "over": {
          "type": "object",
          "properties": {
            "partitionBy": {
              "type": "array",
              "items": {
                "type": "string"
              },
              "description": "PARTITION BY fields"
            },
            "orderBy": {
              "type": "array",
              "items": {
                "type": "object",
                "properties": {
                  "field": {
                    "type": "string"
                  },
                  "order": {
                    "type": "string",
                    "enum": [
                      "asc",
                      "desc"
                    ],
                    "default": "asc"
                  }
                },
                "required": [
                  "field"
                ],
                "additionalProperties": false
              },
              "description": "ORDER BY specification"
            },
            "frame": {
              "type": "object",
              "properties": {
                "type": {
                  "type": "string",
                  "enum": [
                    "rows",
                    "range"
                  ]
                },
                "start": {
                  "type": "string",
                  "description": "Frame start (e.g., \"UNBOUNDED PRECEDING\", \"1 PRECEDING\")"
                },
                "end": {
                  "type": "string",
                  "description": "Frame end (e.g., \"CURRENT ROW\", \"1 FOLLOWING\")"
                }
              },
              "additionalProperties": false,
              "description": "Window frame specification"
            }
          },
          "additionalProperties": false,
          "description": "Window specification (OVER clause)"
        }
      },
      "required": [
        "function",
        "alias",
        "over"
      ],
      "additionalProperties": false
    }
  },
  "$schema": "http://json-schema.org/draft-07/schema#"
}