Forum Discussion
List of M functions that work with Direct Query?
This depends on what data source type you are using, and is a complex question, as generally, Power Bi will try to run to code to fold your query into a native query, but if it fails for whatever reason (not supported, code bug, ect...) it will fall back to importing the data up to that point and do the operations directly, which will break Direct query. For example, a connector (the code behind processing the data source) might support List.Max on number columns, but not text columns.
I'm using SAP Hana.
Would be nice if there were a table then that covered the major sources that allow DQ (there aren't that many) showing which functions worked with which sources.
Of course, I know that's a lot of work. Still if anybody ahs something like that, it would be extremely helpful.