Table.Buffer() Does Not Buffer Nested Values

It’s actually really difficult to come up with a simple demo query to prove this though (the Power Query engine is too clever about not evaluating things it doesn’t need for the final output of a query), but it’s fairly easy to understand the principle. Whenever you have an expression that returns a table something like this:

Source : Chris Webb’s BI Blog
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Nested Display Folders In Power BI

The ability to add columns and measures to display folders in the new Modelling view is one of my favourite features of the November 2018 release of Power BI Desktop: it makes complex models a lot more user-friendly. Being an old-school SSAS developer, I immediately wondered if they worked in the same way that they do in SSAS – and the answer is yes and no.

Bron : Chris Webb’s BI Blog
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