Is it possible to access filename from query?

I have directories with .parquet files configured as datasets according to this:
I can access directory name using dir0-dirN aliases. But is it also possible to somehow access filename to, for example, filter query like this WHERE filename LIKE '20200801%'?
Cannot find any function or field like this.
Using filename mentioned here (Expose filename dates in query engine) gives me SQL syntax validation error.

I’m using the Community Edition Build 4.6.1-202007220122450047-62e084d0


Currently we do not have that feature in the product