---
url: /v6.2/en-us/connecting-atomdata.md
---
# Connecting to AtomData

### Connection Steps

Please follow the steps below to connect to the `AtomData` 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 `AtomData` data source from the list of data source types.
   ![](/images/data-connection/connecting-atomdata-001.png)

3. Fill in the required parameters for the data source connection as prompted.
   ![](/images/data-connection/connecting-atomdata-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                                                                         |
   | 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 | Whether to display the table name or the table comment as the title                        |
   | URL                                    | The JDBC URL of the database                                                                     |
   | Transaction isolation level for read operations | This setting only affects reading data; writing data still uses the default isolation level |
   | 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                   |
   | Show only tables under the specified database/schema | When selected and the database field is not empty, only tables under the specified db are shown |

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

6. Click the `Add` button to add the `AtomData` connection.

> \[!CAUTION] Please note
> **Notes:**
>
> 1. Parameters marked with \* are required; others 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.