I'm using the SAP BW (in-db) connector and while it's currently possible to create a Custom Hierarchy using a combination of dimensions from the query, I cannot then insert that custom hierarchy into a table. I can insert into a crosstab, bar chart, line chart, etc but not a 'standard' table.
We heavily rely on hierarchies and the ability to leverage hierarchical behaviour. Not being able to use a custom hierarchy in a standard table will be misleading for users, especially if they are able to use in other visual types.