Tianyi Wang 9a751f00b8 IMPALA-6822: Add a query option to control shuffling by distinct exprs ...

IMPALA-4794 changed the distinct aggregation behavior to shuffling by
both grouping exprs and the distinct expr. It's slower in queries
where the NDVs of grouping exprs are high and data are uniformly
distributed among groups. This patch adds a query option controlling
this behavior, letting users switch to the old plan.

Change-Id: Icb4b4576fb29edd62cf4b4ba0719c0e0a2a5a8dc
Reviewed-on: http://gerrit.cloudera.org:8080/9949
Reviewed-by: Tianyi Wang <twang@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>

2018-04-12 22:01:35 +00:00

..

queries/PlannerTest

IMPALA-6822: Add a query option to control shuffling by distinct exprs

2018-04-12 22:01:35 +00:00

functional-planner_core.csv

Update benchmark tests to run against generic workload, data loading with scale factor, +more

2014-01-08 10:44:22 -08:00

functional-planner_dimensions.csv

Update benchmark tests to run against generic workload, data loading with scale factor, +more

2014-01-08 10:44:22 -08:00

functional-planner_exhaustive.csv

Update benchmark tests to run against generic workload, data loading with scale factor, +more

2014-01-08 10:44:22 -08:00

functional-planner_pairwise.csv

Update benchmark tests to run against generic workload, data loading with scale factor, +more

2014-01-08 10:44:22 -08:00