{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/risingwave/main/json-schema/risingwave-query-response-schema.json",
  "title": "QueryResponse",
  "description": "Response object returned by the RisingWave Events API /sql endpoint after executing a SQL query.",
  "type": "object",
  "required": ["columns", "rows", "rowsAffected"],
  "properties": {
    "columns": {
      "type": "array",
      "description": "Ordered list of columns in the result set.",
      "items": {
        "$ref": "#/$defs/Column"
      }
    },
    "rows": {
      "type": "array",
      "description": "Result rows. Each item is an object whose keys are column names.",
      "items": {
        "type": "object",
        "additionalProperties": true
      }
    },
    "rowsAffected": {
      "type": "integer",
      "description": "Number of rows returned or affected by the query.",
      "minimum": 0
    },
    "error": {
      "type": "string",
      "description": "Error message when the query failed; property is absent on success."
    }
  },
  "$defs": {
    "Column": {
      "title": "Column",
      "description": "Metadata for a single column in a RisingWave query result.",
      "type": "object",
      "required": ["name", "type", "isPrimaryKey", "isHidden"],
      "properties": {
        "name": {
          "type": "string",
          "description": "Column name as defined in the schema."
        },
        "type": {
          "type": "string",
          "description": "SQL data type of the column (e.g. VARCHAR, BIGINT, BOOLEAN, TIMESTAMP)."
        },
        "isPrimaryKey": {
          "type": "boolean",
          "description": "True when this column is part of the primary key."
        },
        "isHidden": {
          "type": "boolean",
          "description": "True when this column is a system/hidden column not returned in SELECT *."
        }
      }
    }
  }
}