Stamatis, I left a comment on the PR. Overall it looks great to me although I wonder if we want to resolve CALCITE-2582 first to avoid disabling the subquery tests. Thanks!
-- Michael Mior [email protected] Le jeu. 3 janv. 2019 à 11:09, Stamatis Zampetakis <[email protected]> a écrit : > Hello, > > Can somebody have a look in the PR. > > Enriching join operators with RelCollation information can have a big > impact in performance of some queries since it allows dropping redundant > sort operators which are in general costly to evaluate. > > Thanks in advance, > Stamatis > > JIRA: https://issues.apache.org/jira/browse/CALCITE-2554 > PR: https://github.com/apache/calcite/pull/866 >
