To add the Elasticsearch JDBC driver, use Windows > View Drivers menu (or Ctrl+Shift+D shortcut):

Select Elasticsearch profile from the Drivers panel on the left-hand side (if it is missing check the SQuirreL SQL version or add a new entry to the list through the ‘+’ button in the upper left corner):

Select the Extra Class Path tab and Add the JDBC jar. Name the connection and List Drivers to have Class Name populated if it is not already filled-in :

The driver should now appear in the list with a blue check mark next to its name:

Add a new connection or in SQuirreL terminology an alias using the new driver. To do so, select the Aliases panel on the left and click the + sign:

Name the new alias and select the Elasticsearch driver previously added:

The setup is completed. Double check it by clicking on Test Connection.

The connection should open automatically (if it has been created before simply click on Connect in the Alias panel). SQuirreL SQL can now issue SQL commands to Elasticsearch: