Empty parquet file creation and use in Drill

[Khurram Faraaz]

Hello All,

Currently in Drill 1.7.0 we do not support,
  - the creation of empty parquet files.
  - and we see an Exception when empty parquet file is queried using Drill

Should we support the creation of empty parquet file that just has the
metadata information in the parquet footer and no actual data (consider the
CTAS case that uses a LIMIT 0 query)

Once such an empty parquet file is created, Drill should also be able to
query that parquet file, and report to user that there are no rows to
return.

Thanks,
Khurram