Github user arina-ielchiieva commented on the issue:
https://github.com/apache/drill/pull/936
@paul-rogers, the unit tests just show which influence saffron property has
on Drill (since people in the community where asking how to enable support
UTF-8 in Drill), a long with this PR we'll also add description to Drill
documentation.
So far Drill relies on Calcite saffron property to determine which charset
it supports. By default, it's ISO-8859-1. So currently if customer wants to
query UTF-8 data in Drill, he will get an error (one of the unit tests shows
it) and needs to override saffron property to proceed. I guess, we don't
support UTF-8 by default since there are some issues and Drill did not fully
tested UTF-8 support.
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