Creating a MySQL® connection

To create a MySQL® connection:

1. Open the page for creating a new connection.

2. Under Databases, select the MySQL connection.

3. Select the connection type:

   Select in organization

   Specify manually

   Connection Manager

   Select a managed DB in the current Yandex Cloud organization and specify the internal network connection parameters for it:

   • Cloud and folder: Select the folder the cluster is located in.

   • Cluster: Specify a cluster from the list of available MySQL® clusters. Cluster settings must have the DataLens access option enabled. If you do not have an available cluster, click Create new.

     Note

     The list shows the following clusters:

     • With permissions for the user who creates the connection.
     • Created in the same organization as the DataLens instance.

   • Host type. Select a host type:

     • Regular (default): Allows you to select regular hosts to connect to.
     • Special FQDNs: Allows you to select special FQDNs for connection, which always point to the current master host or to its least lagging replica in the MySQL® cluster.

   • Hostname: Select the host name from the list of hosts available in the MySQL® cluster. You can select multiple hosts. If you are unable to connect to the first host, DataLens will select the next one from the list.

   • Port: Specify the MySQL® connection port. The default port is 3306.

   • Path to database: Specify the name of the database to connect to.

   • Username: Specify the username for the MySQL® connection.

   • Password: Enter the password for the user.

   • Cache TTL in seconds: Specify the cache time-to-live or leave the default value. The recommended value is 300 seconds (5 minutes).

   • Raw SQL level: Enables you to use an ad-hoc SQL query to generate a dataset.

     Click Check connection to make sure the parameters are correct.

   Manually specify the parameters of an external database to connect to via a public network:

   • Hostname: Specify the path to a master host or a MySQL® master host IP address. You can specify multiple hosts in a comma-separated list. If you are unable to connect to the first host, DataLens will select the next one from the list.
   • Port: Specify the MySQL® connection port. The default port is 3306.
   • Path to database: Specify the name of the database to connect to.
   • Username. Specify the username for the MySQL® connection.
   • Password: Enter the password for the user.
   • Cache TTL in seconds: Specify the cache time-to-live or leave the default value. The recommended value is 300 seconds (5 minutes).
   • Raw SQL level: Enables you to use an ad-hoc SQL query to generate a dataset.

   

   Click Check connection to make sure the parameters are correct.

   Note

   To use a Connection Manager connection in DataLens, the user must have the connection-manager.user role for this connection.

   Select a connection to a MySQL® managed database cluster created in Yandex Connection Manager:

   • Cloud and folder: Select the folder where the connection to the cluster was created.
   • Connection ID: Select an available connection in Connection Manager or create a new one.
   • Host: Select a host from the list of available hosts in the MySQL® cluster.
   • Port: It is set automatically depending on the selected host.
   • Database: Specify the name of the database to connect.
   • Username: It is set automatically from the selected connection data.
   • Cache TTL in seconds: Specify the cache time-to-live or leave the default value. The recommended value is 300 seconds (5 minutes).
   • Raw SQL level: Enables you to use an ad-hoc SQL query to generate a dataset.

4. Click Create connection.

5. Select a workbook to save your connection to or create a new one. If using legacy folder navigation, select a folder to save the connection to. Click Create.

6. Enter a name for the connection and click Create.

Additional settingsAdditional settings

You can limit data export from charts by enabling Disable data export under Advanced connection settings. With this option enabled, the export data button will be hidden in the charts based on this connection. However, you will still be able to copy chart data and take screenshots.