Github user mattyb149 commented on the issue:
https://github.com/apache/nifi/pull/2507
I'm leery of adding "Hive support" when we know there's a defect,
especially when we had to fix that processor for the exact same reason (other
folks were running into issues using GenerateTableFetch once it accepted
multiple tables). There's also a separate thread on the mailing lists about
adding the database name to the table + column name, and I think it's probably
a good idea. So we wouldn't be able to support an empty table name if we add a
database name, and it's a bummer to default to an empty table name when we do
know how to get the table name for the Hive case.
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