[
  {
    "columnName": "id",
    "columnType": "STRING"
  },
  {
    "columnName": "name",
    "columnType": "STRING"
  },
  {
    "columnName": "color",
    "columnType": "STRING"
  },
  {
    "columnName": "high",
    "columnType": "NUMBER"
  },
  {
    "columnName": "low",
    "columnType": "NUMBER"
  },
  {
    "columnName": "avg",
    "columnType": "NUMBER"
  },
  {
    "columnName": "cDate",
    "columnType": "DATE"
  }
]