---
url: /v6.2/en-us/connecting-gp.md
---
# Connecting to GreenPlum

### Connection Steps

Please follow the steps below to connect to the `GreenPlum` data source.

1. Click "New Data Connection" in the upper right corner of the data connection page.
   ![](/images/data-connection/connection-001.png)

2. Select the `GreenPlum` data source from the list of data source types.
   ![](/images/data-connection/connecting-gp-001.png)

3. Fill in the required parameters for the data source connection as prompted.
   ![](/images/data-connection/connecting-gp-002.png)

   **Connection Configuration Information**

   | Field                                   | Description                                                                                                    |
   | ---------------------------------------- | -------------------------------------------------------------------------------------------------------------- |
   | Name                                    | The name of the connection. Required and must be unique within the user.                                       |
   | Host                                    | The address of the database. If the URL field is filled in, the URL will take precedence.                      |
   | Port                                    | The port of the database. If the URL field is filled in, the URL will take precedence.                         |
   | Username                                | The username for the database.                                                                                 |
   | Password                                | The password for the database.                                                                                 |
   | Database                                | The name of the database.                                                                                      |
   | Schema                                  | The schema of the database.                                                                                    |
   | Max Connections                         | The maximum number of connections in the connection pool.                                                      |
   | Encoding                                | The encoding setting for the database connection.                                                              |
   | Prefer using database comment as dataset title | Choose whether to display the table name or the table comment. When enabled, the title is shown; when disabled, the table comment is shown. |
   | URL                                     | The JDBC URL of the database.                                                                                  |
   | Hierarchical loading of schema and tables| Default is off. When enabled, schemas and tables are loaded hierarchically. Only schemas are loaded during connection; you need to click the schema to load the tables under it. |
   | Query Timeout (seconds)                 | Default is 600. For large data volumes, you can increase the timeout as needed.                                |
   | Allow Write Operations                  | Indicates that this connection can be selected as an output connection in [Data Integration](pipeline.md) and [Batch Sync](batch-sync.md). You must have write permissions on the database and pass verification before configuring this parameter. |
   | Support uploading files to specified path| Indicates the database name where tables generated when creating a local file dataset are stored. You must have write permissions on the database and pass verification before configuring this parameter. |
   | Show only tables under specified database/schema | When this option is selected and the database field is not empty, only tables under the specified database will be displayed. |

4. After filling in the parameters, click the `Validate` button to get the validation result (this checks the connectivity between HENGSHI SENSE and the configured data connection; you cannot add the connection until validation passes).

5. After validation passes, `Allow Write Operations` and `Support uploading files to specified path` will be enabled. You can choose whether to enable these two options.

6. Click `Execute Preset Code` to pop up the preset code for this data source, then click the execute button.

7. Click the `Add` button to add the `GreenPlum` connection.

> \[!CAUTION] Please Note
> 1\. Parameters marked with \* are required; others are optional.
> 2\. You must execute the preset code when connecting to the data source. Failure to do so may result in certain functions being unavailable during data analysis. In addition, when upgrading from a version prior to 4.4 to 4.4, you need to execute the preset code for existing data connections in the system.

***

### Supported `GreenPlum` Versions

`5.x`, `6.x`, `7.x`,

### Data Connection Preview Support

Supports regular `table`, but does not support views or other special tables.

### SQL Dataset Support for SQL

All `SELECT`-related features are supported. The `SELECT SQL` statement must comply with the `GreenPlum` syntax specifications.

### Supported Connection Authentication Methods

Username and password authentication is supported; SSL authentication is not supported.

### Unsupported Field Types

The following data types in GreenPlum cannot be processed correctly:

* interval
* point
* line
* lseg
* box
* path
* polygon
* circle
* macaddr
* bit varying
* tsquery
* tsvector
* xml
* Arrays
* Composite Types
* Range Types