Github user sudheeshkatkam commented on the pull request:
https://github.com/apache/drill/pull/193#issuecomment-152034356
Also, on the execution side, I was actually hitting
[DRILL-2288](https://issues.apache.org/jira/browse/DRILL-2288), where sending
exactly one batch with schema and without data is not handled correctly by
various RecordBatches. With a fix for that issue, we could add further
optimization for schemaed tables (i.e. add the previous implementation) with
this implementation as the fallback.
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