Github user fhueske commented on the issue:
https://github.com/apache/flink/pull/3799
Thanks @twalthr for taking care of this!
Most of the files have been copied from the Calcite master, so I won't
review those. The other changes look good.
+1 to merge this PR.
@twalthr, can you also create a JIRA to remove the files when Calcite 1.13
is released?
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