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From Dmitry Minkovsky <dminkov...@gmail.com>
Subject What is the best way to re-key a KTable?
Date Tue, 23 Jan 2018 17:14:29 GMT
KStream has a simple `#selectKey()` method, but it appears the only way to
re-key a KTable is by doing `.toStream(mapper).groupByKey().reduce()`. Is
this correct? I'm guessing this is because an attempt to re-key a table
might result in multiple values at the new key.

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