Chao created HIVE-8242:
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Summary: Investigate test failures when
hive.multigroupby.singlereducer and hive.optimize.multigroupby.common.distincts
are set to false [Spark Branch]
Key: HIVE-8242
URL: https://issues.apache.org/jira/browse/HIVE-8242
Project: Hive
Issue Type: Bug
Components: Spark
Reporter: Chao
Priority: Minor
Currently, we rely on setting {{hive.optimize.multigroupby.common.distincts}}
and {{hive.multigroupby.singlereducer}} to false to enable some groupby related
tests. However, some other tests may fail because of this change. For instance,
in {{groupby10.q}}, the last test will fail with exception:
{noformat}
FAILED: SemanticException [Error 10022]: DISTINCT on different columns not
supported with skew in data
{noformat}
Since when {{hive.groupby.skewindata}} is set to true and
{{hive.optimize.multigroupby.common.distincts}} is set to false, the distinct
keyword is not supported.
There may be other issues like this. This JIRA is created to collect these
issues, and ideally, find out why they fail.
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