# Source: https://dbeaver.com/docs/dbeaver/Database-driver-Parquet/

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      * Parquet  [ Parquet  ](./) Table of contents 
        * Parquet Files driver connection settings 
        * Features and capabilities 
          * Advanced SQL query capabilities 
          * Folder structure 
          * Internal database 
          * Additional features 
        * Supported compression formats 
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  * [ FAQ  ](../FAQ/)

Table of contents

  * Parquet Files driver connection settings 
  * Features and capabilities 
    * Advanced SQL query capabilities 
    * Folder structure 
    * Internal database 
    * Additional features 
  * Supported compression formats 

  1. [DBeaver](/docs/dbeaver)
  2. [Databases support](/docs/dbeaver/Database-drivers)
  3. File drivers

# Parquet

Note

This feature is available in [Lite](../Lite-Edition/),
[Enterprise](../Enterprise-Edition/), [Ultimate](../Ultimate-Edition/) and
[Team](https://dbeaver.com/docs/team-edition/) editions only.

This guide provides instructions on how to set up and use Parquet files with
DBeaver. The **Parquet** driver allows you to work with Parquet data as if it
were in a database. You can retrieve data and apply filters, sorting, and
other operations, even combining data from multiple files.

Important

When using the **Parquet** driver, all connected Parquet files are read-only.
To make changes, you need to update the original files outside DBeaver.

Before you start, you need to create a connection in DBeaver and select the
appropriate **Parquet** driver. If you havenât done this, see our [Database
Connection](../Create-Connection/) article.

![](../images/database/parquet/parquet-driver.png)

You can open and work with Parquet files stored in your [Cloud
Storage](../Cloud-Storage/) directly in DBeaver. Double-click a file to create
a temporary connection. Files opened during a session appear in the **File
databases** folder in [Database Navigator](../Database-Navigator/). These
temporary connections are removed when you close DBeaver.

## Parquet Files driver connection settings¶

This section describes how to set up a connection using the **Parquet**
driver. The connection settings page requires the following fields:

![](../images/database/parquet/parquet-connection-page.png)

**Field** | **Description**  
---|---  
**Connect by (Path/URL)** | Choose whether to connect using a local host path or a URL.  
**File paths** | Specify the location of the Parquet file(s). Choose an action:   
  
\- **Edit** : Modify an existing file or folder selection.  
\- **Add** : Add a new file or folder.  
\- **Remove** : Delete a selected file or folder.  
  
When **Editing** or **Adding** , choose from:  
  
\- **File** : Select a single file.  
\- **Folder** : Choose a directory containing multiple Parquet files. For more
details, see Folder structure section.  
\- **Remote** : Access a remote folder via [Cloud Storage](../Cloud-Storage/).
This feature is available only in Ultimate and Team Editions.  
**Driver name** | This field will be auto-filled based on your selected driver type.  
**Driver settings** | If there are any specific driver settings, configure them here.  
  
Tip

When using the **Folder** option, DBeaver scans the directory up to two levels
deep for Parquet files. For more information, see folder structure. If you
select a folder, DBeaver organizes files in schemas based on their directory
structure.

## Features and capabilities¶

### Advanced SQL query capabilities¶

The **Parquet** driver supports the full range of SQL queries:

  * **Simple queries** (e.g., `SELECT * FROM table`): Data is read directly from the Parquet file.
  * **Complex queries** (e.g., using `WHERE`, `JOIN`, `ORDER BY`, `GROUP BY`): When a complex query is executed for the first time, the driver imports the entire Parquet file into an internal database to enable advanced SQL functions. Subsequent queries run faster because the data is already imported into internal database.

### Folder structure¶

When working with a folder containing multiple Parquet files, DBeaver
organizes them as follows:

Folder structure | Schema in DBeaver  
---|---  
Root files | `Default` schema  
Subfolder files | Schema named after the subfolder  
Files in deeper folders | Ignored  
  
If your folder looks like this:

    
    
    Data/
    âââ employees.parquet
    âââ sales.parquet
    âââ Reports/
        âââ monthly.parquet
        âââ yearly.parquet
    

DBeaver will create:

  * `Default` schema: `employees`, `sales`
  * `Reports` schema: `monthly`, `yearly`

Tip

To focus on specific files, consider selecting individual files or folders
when configuring the connection.

### Internal database¶

When you execute a complex query (such as `WHERE`, `JOIN`, `GROUP BY`, or
`ORDER BY`.), on a **Parquet** file for the first time, the **Parquet** driver
processes the data by importing it into a temporary internal SQLite database.

By default, this internal database stores data temporarily on the disk during
your session and is cleared when DBeaver restarts. To speed up queries on the
same file in future sessions, you can specify the `internalDbFilePath` option
in the **Driver properties** tab (e.g., `C:\User\database.db`) to reuse the
processed data.

![](../images/database/parquet/internal-database-settings.png)

Info

For more details on driver properties, see [File-based driver
properties](../File-based-driver-properties/).

### Additional features¶

DBeaver provides additional features compatible with **Parquet** driver, but
not exclusive to it:

Category | Feature  
---|---  
Data Transfer | [Data Export](../Data-export/)  
Data Visualization | [Visual Query Builder](../Visual-Query-Builder/)  
| [Charts](../Managing-Charts/)  
  
## Supported compression formats¶

DBeaver supports the following compression formats for Parquet files:

Format | Supported out of the box | Notes  
---|---|---  
Zstandard (`zstd`) | Yes | Works without additional setup  
Snappy | No | Add the [`snappy-java`](https://mvnrepository.com/artifact/org.xerial.snappy/snappy-java) `JAR` to the driver library  
`LZ4_RAW` | No | Add the [`aircompressor`](https://mvnrepository.com/artifact/io.airlift/aircompressor) `JAR` to the driver library  
  
Info

For details on adding a `JAR` files to the driver library, see [Driver
Manager](../Driver-Manager/#update-driver-manually).

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