Aman Sinha has posted comments on this change. ( http://gerrit.cloudera.org:8080/21377 )
Change subject: IMPALA-8042: Assign BETWEEN selectivity for discrete-unique column ...................................................................... Patch Set 6: Code-Review+2 (2 comments) I reviewed the TPC-DS plan changes and they are along expected lines due to the change in selectivity estimate, mostly for the between predicate on date_dim table. Bumping to +2. A note on the range predicate selectivity in general: this is normally done by histograms but in its absence in Impala, this patch is solving a narrower scope of this estimation. Future improvements in stats could subsume this patch. http://gerrit.cloudera.org:8080/#/c/21377/6/testdata/workloads/functional-planner/queries/PlannerTest/tpcds_cpu_cost/tpcds-q05.test File testdata/workloads/functional-planner/queries/PlannerTest/tpcds_cpu_cost/tpcds-q05.test: http://gerrit.cloudera.org:8080/#/c/21377/6/testdata/workloads/functional-planner/queries/PlannerTest/tpcds_cpu_cost/tpcds-q05.test@202 PS6, Line 202: | | tuple-ids=19,21 row-size=32B cardinality=9.65M cost=611185704 > Bulk of HashJoin memory is for the builder side. And in this case, I think Makes sense. http://gerrit.cloudera.org:8080/#/c/21377/6/testdata/workloads/functional-planner/queries/PlannerTest/tpcds_cpu_cost/tpcds-q12.test File testdata/workloads/functional-planner/queries/PlannerTest/tpcds_cpu_cost/tpcds-q12.test: http://gerrit.cloudera.org:8080/#/c/21377/6/testdata/workloads/functional-planner/queries/PlannerTest/tpcds_cpu_cost/tpcds-q12.test@123 PS6, Line 123: 40.26M > Yes, I think it is lower due to selective partition filter RF002 that comes Done -- To view, visit http://gerrit.cloudera.org:8080/21377 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: comment Gerrit-Change-Id: Ib349d97349d1ee99788645a66be1b81749684d10 Gerrit-Change-Number: 21377 Gerrit-PatchSet: 6 Gerrit-Owner: Riza Suminto <riza.sumi...@cloudera.com> Gerrit-Reviewer: Aman Sinha <amsi...@cloudera.com> Gerrit-Reviewer: David Rorke <dro...@cloudera.com> Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com> Gerrit-Reviewer: Kurt Deschler <kdesc...@cloudera.com> Gerrit-Reviewer: Riza Suminto <riza.sumi...@cloudera.com> Gerrit-Comment-Date: Fri, 24 May 2024 00:07:01 +0000 Gerrit-HasComments: Yes
