Queries completely pruned by the broker should still return a result table

[jadami10]

If you send a query to Pinot where all the segments are pruned by the broker, the response from Pinot does not contain resultTable. Meaning it does not have the schema, data types, or even empty rows. This is non-intuitive to Pinot users. Especially since if you send a query that makes it to the servers but prunes every segment or matches no documents, Pinot returns the schema, column names, and an empty rows variable.

[Udit107710]

@Jackie-Jiang I would like to take this up! I will be ready with my initial thought process in some time.

[Udit107710]

Hey
I was unavailable for some time and couldn't pick this up. I see activity here and hence please assign the issue to @vvivekiyer