Zoltan Matyus created HIVE-24213:
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Summary: Incorrect exception in the Merge MapJoinTask into its
child MapRedTask optimizer
Key: HIVE-24213
URL: https://issues.apache.org/jira/browse/HIVE-24213
Project: Hive
Issue Type: Bug
Components: Physical Optimizer
Affects Versions: 4.0.0
Reporter: Zoltan Matyus
Assignee: Zoltan Matyus
The {{CommonJoinTaskDispatcher#mergeMapJoinTaskIntoItsChildMapRedTask}} method
throws a {{SemanticException}} if the number of {{FileSinkOperator}}s it finds
is not exactly 1. The exception is valid if zero operators are found, but there
can be valid use cases where multiple FileSinkOperators exist.
Example: the MapJoin and it child are used in a common table expression, which
is used for multiple inserts.
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