Github user JamesRTaylor commented on the pull request:
https://github.com/apache/phoenix/pull/114#issuecomment-133897978
Thanks for the pull. One feature that Phoenix (and other RDBMS) has is that
if a column identifier is double quoted, then it's treated as case sensitive.
Otherwise, it's upper cased as you've mentioned. Would be good if we could
accommodate this too in the phoenix-spark integration. If we can't do this,
then we may need to keep it as case sensitive as otherwise we can't support the
case sensitive use case.
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