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From jaltekruse <...@git.apache.org>
Subject [GitHub] drill issue #546: DRILL-4783: flatten operator should not throw exception if...
Date Wed, 20 Jul 2016 17:22:56 GMT
Github user jaltekruse commented on the issue:

    The original behavior was not by design, it was a bug. I would just detect the case where
a scalar is being flattened and throw an appropriate user facing message like "Flatten does
not support inputs of non-list values".
    The tests you have included here don't check their results. I would also suggest adding
a test for the new negative case, checking for the appropriate message.
    If you want to more precisely control the input to your test, I would recommend taking
a look at the operator unit test system I checked in and demonstrated at the hangout last
month. This will allow you to write more targeted tests for this case. Feel free to ask questions
if the usage is not clear from the examples in this class.

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