The SQL Server sqlvariant data type is not currently supported by the JDBC driver. If a query is used to retrieve data from a table that contains a column of the sqlvariant data type, an exception will occur.
JDBC driver of SQL Server will return an error: The "variant" data type is not supported.
CloudTest relies on the JDBC driver of SQL Server for Direct to Database Testing. The user has to avoid the “variant” data type when using the Direct to Database Testing feature on CLoudTest.
More information can be found on the following Microsoft page