One of the connectors is designed to work with SQL Server 2008 R2 and is currently available for download here as a CTP test release. The other connector is for SQL Server Parallel Data Warehouse ...

The connector makes it easier to bring data from Microsoft SQL databases into Google Data Studio.

Finally, the SQL Server and Azure SQL Connector for Apache Spark has been open-sourced under the ApacheV2 license. More updates for the connector are planned to be released when it goes live.