Bharath Vissapragada has posted comments on this change. ( http://gerrit.cloudera.org:8080/11565 )
Change subject: IMPALA-7659: Populate NULL count while computing column stats ...................................................................... Patch Set 6: (2 comments) I fixed the tests based on the failures I noticed in a core run. I'll trigger another test run to see if it comes out green. Meanwhile, I'm also running an exhaustive run so that there are no surprises later. http://gerrit.cloudera.org:8080/#/c/11565/5//COMMIT_MSG Commit Message: http://gerrit.cloudera.org:8080/#/c/11565/5//COMMIT_MSG@10 PS5, Line 10: re-enables it since a lot of codegen improvements have happened since > This fix would be helpful for IMPALA-7310: if NDV=0, we need to know if nul Agreed. http://gerrit.cloudera.org:8080/#/c/11565/5/fe/src/main/java/org/apache/impala/analysis/ComputeStatsStmt.java File fe/src/main/java/org/apache/impala/analysis/ComputeStatsStmt.java: http://gerrit.cloudera.org:8080/#/c/11565/5/fe/src/main/java/org/apache/impala/analysis/ComputeStatsStmt.java@251 PS5, Line 251: " IS NULL THEN 1 ELSE NULL END)"); > If this expression is faster than an if() function (IMPALA-7655), then does Agree with you. I think it's better to do it as a separate change. -- 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: 6 Gerrit-Owner: Anonymous Coward <piotr.findei...@gmail.com> Gerrit-Reviewer: Anonymous Coward <piotr.findei...@gmail.com> Gerrit-Reviewer: Bharath Vissapragada <bhara...@cloudera.com> Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com> Gerrit-Reviewer: Paul Rogers <par0...@yahoo.com> Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com> Gerrit-Reviewer: Vuk Ercegovac <vercego...@cloudera.com> Gerrit-Comment-Date: Fri, 30 Nov 2018 22:31:29 +0000 Gerrit-HasComments: Yes
