When opening a published workbook connected to Firebird using Custom SQL, the following error occurs:
TableauException: The 'firebird' data source does not support custom sql
Additionally, when publishing a Firebird connection using Custom SQL from Tableau Desktop, one of the following errors may occur:
Unknown server error
An unexpected error has occurred. If you continue to receive this error, contact your Tableau Server administrator.
TableauException: The 'firebird' data source does not support custom sql.
Do you want to reset the view?
An error occurred while communication with Tableau Server. The connection to the data sources might have been lost.
Error: Unable to connect to this Tableau Server data source.
The data source 'firebird' does not support custom sql.
Unable to connect to the server ["any.tableau.online.pod"]. Check that the server is running and that you have access privileges to the requested database.