> For the complete documentation index, see [llms.txt](https://docs.pentaho.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pentaho.com/pdia-data-integration/10.2-data-integration/pdi-transformation-steps-reference-overview/parquet-output/options-parquet-output/fields-tab.md).

# Fields tab

![Parquet Output step](/files/Wy832ujYZS2JAM8shbvw)

In the **Fields** tab, you can define properties for the fields being exported. The table below describes each of the options for configuring the field properties.

| Property          | Description                                                                                                                       |
| ----------------- | --------------------------------------------------------------------------------------------------------------------------------- |
| **Parquet Path**  | Specify the name of the column in the Parquet file.                                                                               |
| **Name**          | Specify the name of the PDI field.                                                                                                |
| **Parquet Type**  | Specify the data type used to store the data in the Parquet file.                                                                 |
| **Precision**     | Specify the total number of significant digits in the number (only applies to the Decimal Parquet type). The default value is 20. |
| **Scale**         | Specify the number of digits after the decimal point (only applies to the Decimal Parquet type). The default value is 10.         |
| **Default value** | Specify the default value of the field if it is null or empty.                                                                    |
| **Null**          | Specify if the field can contain null values.                                                                                     |

**Note:** To avoid a transformation failure, make sure the **Default value** field contains values for all fields where **Null** is set to No.

You can define the fields manually, or you can click **Get Fields** to automatically populate the fields. When the fields are retrieved, a PDI type is converted into an appropriate Parquet type, as shown in the table below. You can also change the selected Parquet type by using the **Type** drop-down or by entering the type manually.

| PDI Type    | Parquet Type    |
| ----------- | --------------- |
| InetAddress | UTF8            |
| String      | UTF8            |
| TimeStamp   | TimestampMillis |
| Binary      | Binary          |
| BigNumber   | Decimal         |
| Boolean     | Boolean         |
| Date        | Date            |
| Integer     | Int64           |
| Number      | Double          |


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