---
url: /v6.2/en-us/connecting-tdsql-postgresql.md
---
# Connect to TDSQL PostgreSQL

### Connection Steps

Please follow the steps below to connect to the `TDSQL PostgreSQL` 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 `TDSQL PostgreSQL` data source from the data source types.
   ![](/images/data-connection/connecting-tdsql-postgresql-001.png)

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

   **Connection Configuration Information Description**

   | Field                                 | Description                                                                                                    |
   | -------------------------------------- | -------------------------------------------------------------------------------------------------------------- |
   | Name                                  | The name of the connection. Required and unique within the user.                                               |
   | Host Address                          | 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.                                                              |
   | ssl                                   | Whether to use SSL connection.                                                                                 |
   | Prefer using database comment as dataset title | Whether to display the table name or the table comment as the title. When enabled, the title is shown; when disabled, the table comment is shown. |
   | sslmode                               | Fill in according to PostgreSQL configuration, such as "disable", "allow", "prefer", "require", "verify-ca", "verify-full". |
   | URL                                   | The JDBC URL of the database.                                                                                  |
   | Hierarchical loading of schema and tables | Disabled by default. 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. When the data volume is large, you can appropriately increase the timeout.                     |
   | 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 to the database and pass verification before configuring this parameter. |
   | Support uploading files to specified path | Indicates the database name where the table generated when creating a local file dataset is stored. You must have write permissions to the database and pass verification before configuring this parameter. |
   | Only show tables under specified database/schema | When this option is selected and the database field is not empty, only tables under the specified db are 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 if validation fails).

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

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

7. Click the `Add` button to add the `TDSQL PostgreSQL` connection.

> \[!CAUTION] Please note
>
> 1. Parameters marked with \* are required; other parameters are optional.
> 2. When connecting to a data source, you must execute the preset code. 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.