Github user DmytroShkvyra commented on the issue:
https://github.com/apache/flink/pull/3502
@twalthr I have tried run `SubQueryRemoveRule` (register it in
`FlinkRulesSets`) and so on but it have not called from Flink. I have looked
thru Calcite docs and they said that calcite rules called accordingly signature
of their constructors. So we should register it in `FlinkRulesSets.scala`. But
scala has unpleasant thing - erasure. And I suspect it is root cause of it.
P.S. Sometime I'm going crazy about travis build timeouts :-(
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