You can press the 'Test' button at the bottom of the dialog to test if the file is accessible by the driver.
To create the actual data set for the report, Click the '+' button ('Add a query…') right of 'Available Queries'.
In the 'Query Name' field, provide a name for the query
In the 'Query' pane, type or copy the select statement.
It is also possible to design the SQL statement graphically by using the SQL Query Designer. To do so, click the yellow pencil button in the upper right-hand corner above the query pane. The 'SQL Query Designer' window opens.
The entered data can be previewed in the 'JDBC Data Source" dialog.
Click the 'OK' button.
The new data set with all properties should appears in the Report Explorer 'Data' tab.
If not, run action 'Select Query' for the dataset.