Test the connection to the Informix® data source server to determine if the federated server is properly configured to access Informix data sources.
You can test the connection to the Informix server by using the server definition and user mappings that you defined.
SET PASSTHRU server_definition_name
SELECT count(*) FROM informix.systables
SET PASSTHRU RESET
If the SELECT statement returns an error, you should troubleshoot the connection errors.