Csaba Ringhofer has posted comments on this change. ( http://gerrit.cloudera.org:8080/18543 )
Change subject: IMPALA-11301: Fix extreme = and != selectivity for NDV=1 ...................................................................... Patch Set 2: Found out the reasons behind the failed tests: - analytic functions return ndv 1 (incorrectly) - "having" clause returns ndv 1 (incorrectly) - several columns in tpcds (scale factor 1) have ndv=1 - in these cases the = predicate leading selectivity of 1.0 seems optimal, as they always filter for the value that exists -- To view, visit http://gerrit.cloudera.org:8080/18543 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: comment Gerrit-Change-Id: I6b5334a8d7d6ca46a450ff98ae03e5269faaa3c6 Gerrit-Change-Number: 18543 Gerrit-PatchSet: 2 Gerrit-Owner: Csaba Ringhofer <[email protected]> Gerrit-Reviewer: Abhishek Rawat <[email protected]> Gerrit-Reviewer: Aman Sinha <[email protected]> Gerrit-Reviewer: Csaba Ringhofer <[email protected]> Gerrit-Reviewer: Gabor Kaszab <[email protected]> Gerrit-Reviewer: Impala Public Jenkins <[email protected]> Gerrit-Reviewer: Zoltan Borok-Nagy <[email protected]> Gerrit-Comment-Date: Thu, 19 May 2022 10:33:09 +0000 Gerrit-HasComments: No
