Github user mehant commented on the pull request:
https://github.com/apache/drill/pull/136#issuecomment-135205449
There have been bugs in the handling of sv2 in the case where the first and
second batch are filtered out. Could you add a test case for this? a similar
test was added for streaming aggregate as part of DRILL-3069:
https://github.com/apache/drill/commit/97a63168e93a70c7ed88d2e801dd2ea2e5f1dd74
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