# ColumnDataType

| Enums ||
|---|---|
| `COLUMN_DATA_TYPE_UNSPECIFIED` | Default enum value, no effect on types. Do not use. |
| `COLUMN_DATA_TYPE_STRING` | The associated column should be treated as a string (in the same encoding as the input file, if the file is CSV). Useful if the column is auto-detected as numeric. |
| `COLUMN_DATA_TYPE_NUMERIC` | The associated column should be treated as a numeric (useful for columns with no data, which become strings by default). |
| `COLUMN_DATA_TYPE_LONG` | The associated column should be treated as a long. |