Github user mattyb149 commented on the issue:
https://github.com/apache/nifi/pull/3057
I found the issue and pushed a new commit with the fix. Also your test data
exercised another part of the code I hadn't thought of, your "as" field is a
keyword in Hive so when I used the generated hive.ddl attribute to create the
table on top of the ORC files, it didn't work. The other change in this commit
is to backtick-quote the field names to protect against field names that are
reserved words.---
