[email protected] has posted comments on this change. ( http://gerrit.cloudera.org:8080/11565 )
Change subject: Simplify expression to collect NULLs count ...................................................................... Patch Set 1: > I can reproduce the difference you're seeing - the aggregation *is* > dramatically slower. I am not sure which aggregation you mean -- technically, `COUNT(*)`, `COUNT(symbol)`, `COUNT(IF(...))` are all aggregations. Do you mean that my proposed version turned out to be slower in your testing? -- To view, visit http://gerrit.cloudera.org:8080/11565 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: comment Gerrit-Change-Id: Ic68f8b4c3756eb1980ce299a602a7d56db1e507a Gerrit-Change-Number: 11565 Gerrit-PatchSet: 1 Gerrit-Owner: [email protected] Gerrit-Reviewer: Impala Public Jenkins <[email protected]> Gerrit-Reviewer: Tim Armstrong <[email protected]> Gerrit-Reviewer: [email protected] Gerrit-Comment-Date: Thu, 04 Oct 2018 07:33:23 +0000 Gerrit-HasComments: No
