{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/api-evangelist/trino/blob/main/json-schema/trino-query-results-schema.json",
  "title": "Trino Query Results",
  "description": "Schema for the QueryResults response object returned by POST /v1/statement and GET nextUri in the Trino Client REST API",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "Unique query identifier assigned by the Trino coordinator",
      "examples": ["20240515_143022_00001_xyz12"]
    },
    "infoUri": {
      "type": "string",
      "format": "uri",
      "description": "URI for human-readable query information in the Trino Web UI"
    },
    "nextUri": {
      "type": "string",
      "format": "uri",
      "description": "URI to fetch the next batch of results. Absent when the query is complete."
    },
    "columns": {
      "type": "array",
      "description": "Column definitions for the result set",
      "items": {
        "type": "object",
        "required": ["name", "type"],
        "properties": {
          "name": {
            "type": "string",
            "description": "Column name"
          },
          "type": {
            "type": "string",
            "description": "Trino data type name",
            "examples": ["varchar", "bigint", "double", "boolean", "timestamp", "array(varchar)"]
          },
          "typeSignature": {
            "type": "object",
            "description": "Structured type signature for complex Trino types",
            "properties": {
              "rawType": { "type": "string" },
              "arguments": {
                "type": "array",
                "items": {}
              }
            }
          }
        }
      }
    },
    "data": {
      "type": "array",
      "description": "Result rows as arrays of values in column order. Absent when no data is available yet.",
      "items": {
        "type": "array",
        "items": {}
      }
    },
    "updateType": {
      "type": "string",
      "description": "DDL/DML operation type for non-SELECT statements",
      "examples": ["CREATE TABLE", "INSERT", "DROP TABLE", "ALTER TABLE"]
    },
    "updateCount": {
      "type": "integer",
      "format": "int64",
      "description": "Number of rows affected by a DML statement"
    },
    "stats": {
      "$ref": "#/$defs/QueryStats"
    },
    "error": {
      "$ref": "#/$defs/QueryError"
    },
    "warnings": {
      "type": "array",
      "description": "Non-fatal warnings from query execution",
      "items": {
        "$ref": "#/$defs/Warning"
      }
    }
  },
  "$defs": {
    "QueryStats": {
      "title": "Query Stats",
      "type": "object",
      "description": "Runtime execution statistics for a Trino query",
      "properties": {
        "state": {
          "type": "string",
          "description": "Current query execution state",
          "enum": ["QUEUED", "PLANNING", "STARTING", "RUNNING", "FINISHING", "FINISHED", "FAILED"]
        },
        "queued": { "type": "boolean" },
        "scheduled": { "type": "boolean" },
        "nodes": {
          "type": "integer",
          "description": "Number of cluster nodes participating in query execution"
        },
        "totalSplits": { "type": "integer", "format": "int64" },
        "queuedSplits": { "type": "integer", "format": "int64" },
        "runningSplits": { "type": "integer", "format": "int64" },
        "completedSplits": { "type": "integer", "format": "int64" },
        "cpuTimeMillis": { "type": "integer", "format": "int64" },
        "wallTimeMillis": { "type": "integer", "format": "int64" },
        "queuedTimeMillis": { "type": "integer", "format": "int64" },
        "elapsedTimeMillis": { "type": "integer", "format": "int64" },
        "processedRows": { "type": "integer", "format": "int64" },
        "processedBytes": { "type": "integer", "format": "int64" },
        "peakMemoryBytes": { "type": "integer", "format": "int64" },
        "spilledBytes": { "type": "integer", "format": "int64" },
        "progressPercentage": {
          "type": "number",
          "format": "double",
          "minimum": 0,
          "maximum": 100
        }
      }
    },
    "QueryError": {
      "title": "Query Error",
      "type": "object",
      "description": "Error information when a Trino query fails",
      "properties": {
        "message": {
          "type": "string",
          "description": "Human-readable error message"
        },
        "sqlState": {
          "type": "string",
          "description": "ANSI SQL state code"
        },
        "errorCode": {
          "type": "integer",
          "description": "Trino numeric error code"
        },
        "errorName": {
          "type": "string",
          "description": "Symbolic error name",
          "examples": ["SYNTAX_ERROR", "QUERY_EXCEEDED_MEMORY_LIMIT", "CATALOG_NOT_FOUND"]
        },
        "errorType": {
          "type": "string",
          "description": "Error classification",
          "enum": ["USER_ERROR", "INTERNAL_ERROR", "INSUFFICIENT_RESOURCES", "EXTERNAL"]
        },
        "errorLocation": {
          "type": "object",
          "description": "Location in the SQL query where the error occurred",
          "properties": {
            "lineNumber": { "type": "integer" },
            "columnNumber": { "type": "integer" }
          }
        }
      }
    },
    "Warning": {
      "title": "Warning",
      "type": "object",
      "description": "Non-fatal warning from Trino query execution",
      "properties": {
        "warningCode": {
          "type": "object",
          "properties": {
            "code": { "type": "integer" },
            "name": { "type": "string" }
          }
        },
        "message": { "type": "string" }
      }
    }
  }
}