[
  {
    "mode": "NULLABLE",
    "name": "timestamp",
    "type": "TIMESTAMP"
  },
  {
    "mode": "NULLABLE",
    "name": "client_ip",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "geo_country",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "geo_city",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "host",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "url",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "request_method",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "request_protocol",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "request_referer",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "request_user_agent",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "response_state",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "response_status",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "response_reason",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "response_body_size",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "fastly_server",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "fastly_is_edge",
    "type": "BOOLEAN"
  },
  {
    "mode": "NULLABLE",
    "name": "x_horizon_status_code",
    "type": "STRING"
  },
  {
    "description": "Time taken to make the horizon query in milliseconds",
    "mode": "NULLABLE",
    "name": "x_horizon_request_duration",
    "type": "INTEGER"
  },
  {
    "description": "Time taken for request in microseconds.",
    "mode": "NULLABLE",
    "name": "time_elapsed",
    "type": "STRING"
  },
  {
    "description": "The size of the request headers.",
    "mode": "NULLABLE",
    "name": "request_header_bytes_read",
    "type": "STRING"
  },
  {
    "description": "The size of the request body.\n",
    "mode": "NULLABLE",
    "name": "request_body_bytes_read",
    "type": "STRING"
  },
  {
    "description": "The size of the response headers.",
    "mode": "NULLABLE",
    "name": "response_header_bytes_written",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "ja4_fingerprint",
    "type": "STRING"
  },
  {
    "description": "prefetch or not",
    "mode": "NULLABLE",
    "name": "purpose",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "x_experimentation_cache",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "x_redirects_cache",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "custom_preflight_cache",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "redirect_preflight_start_time",
    "type": "INTEGER"
  },
  {
    "mode": "NULLABLE",
    "name": "redirect_preflight_end_time",
    "type": "INTEGER"
  },
  {
    "mode": "NULLABLE",
    "name": "experimentation_preflight_start_time",
    "type": "INTEGER"
  },
  {
    "mode": "NULLABLE",
    "name": "experimentation_preflight_end_time",
    "type": "INTEGER"
  },
  {
    "mode": "NULLABLE",
    "name": "custom_preflight_start_time",
    "type": "INTEGER"
  },
  {
    "mode": "NULLABLE",
    "name": "custom_preflight_end_time",
    "type": "INTEGER"
  },
  {
    "mode": "NULLABLE",
    "name": "cf_ray",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "horizon_ray",
    "type": "STRING"
  }
]