HIVE-29456: HiveProjectSortExchangeTransposeRule throws NoElementExce… #6315
+52
−1
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…ption when SORT BY columns are not in SELECT list
What changes were proposed in this pull request?
If a target mapping is missing, we get a
Mappings.NoElementExceptionfrom Calcite. We can just returnnulland skipHiveProjectSortExchangeTransposeRuleas it's not possible to push theProjectbelow theSortin that case.Why are the changes needed?
We get an Exception, which can be reproduced as described in https://issues.apache.org/jira/browse/HIVE-29456
Does this PR introduce any user-facing change?
No
How was this patch tested?