Github user xguo27 commented on the pull request:
https://github.com/apache/spark/pull/9612#issuecomment-156276620
Hi Wenchen:
Can you elaborate on using ByteType for char a little more?
Ultimately, the difference between char(x) and varchar(x) is the
fixed/variable length, which results in padding. So it's a good idea to keep
the underlying type the same, right?
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