Github user weijietong commented on the issue:
https://github.com/apache/drill/pull/889
@amansinha100 thanks for sharing the information. Got your point. I think
your propose on
[CALCITE-1048](https://issues.apache.org/jira/browse/CALCITE-1048) is possible.
Since [CALCITE-794](https://issues.apache.org/jira/browse/CALCITE-794) has
completed at version 1.6 ,it seems there's a more perfect solution( to get the
least max number of all the rels of the RelSubSet). But due to Drill's Caclite
version is still based on 1.4 , I support your current temp solution. Only
wonder that whether the explicitly searched RelNode's (such as
DrillAggregateRel) maxRowCount can represent the best RelNode's maxRowCount ?
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