The issue I'm facing is in a setup using a connection to an SAP HANA backend with Tableau. In this setup I encounter a very specific issue: when drilling up across related fields (year-month-day for example) Tableau will not poll the DB for calculated fields and instead try to perform aggregation itself resulting in a straight sum of the values.
The maximum calculable value in this scenario should be 100% so these values are obviously wrong. It seems that Tableau is doing aggregation itself. How can I stop it from doing this?
With Tableau 10.1 providing improved support for calculated parameters with SAP HANA, I would sign up for our beta and see if the issue still persists in 10.1: