Files
impala/testdata/workloads/functional-query/queries/QueryTest
Tim Armstrong ab7e209d1b IMPALA-9099: allow mt_dop for joins without feature flag
This allows running *any* read-only query with mt_dop > 0.
Before this patch, no joins were allowed with mt_dop > 0.

Previous patches, particularly IMPALA-9156, added significantly
more code coverage for multithreading+joins. It should be safe to
allow enabling on a query-by-query basis. Many improvements are
still planned - see IMPALA-3902. So behaviour and performance
characteristics of mt_dop > 0 with more complex plans and joins
will continue to change.

Testing:
Updated the mt_dop validation tests and remove redundant planner test
that doesn't provide much additional coverage of the validation
support.

Ran exhaustive tests.

Change-Id: I9c6566abb239db0e775f2beaa25a62c36313cd6f
Reviewed-on: http://gerrit.cloudera.org:8080/15545
Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
2020-03-31 20:45:59 +00:00
..
2014-06-20 13:35:10 -07:00