Github user arina-ielchiieva commented on the issue:
https://github.com/apache/drill/pull/1152
@chunhui-shi yes, you are correct, we are trying to find item star columns
and push them into scan
This case if F is optional then we don't have filter and there will no
filter push down, only project push down can happen in this case. Such case is
covered in `testProjectIntoScanWithSeveralNestedStarSubQueries`.
Regarding additional columns in the outermost 'select' , could you please
give an example?
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