Krisztian Kasa created HIVE-22508:
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Summary: KeyWrapperComparator throws exception
Key: HIVE-22508
URL: https://issues.apache.org/jira/browse/HIVE-22508
Project: Hive
Issue Type: Bug
Components: Physical Optimizer
Reporter: Krisztian Kasa
Assignee: Krisztian Kasa
Fix For: 4.0.0
TopNKeyOperator.KeyWrapperComparator throws exception when a new key and a
copied key should be compared.
The current implementation uses the standard object inspectors for all
KeyWrapper instances. However when comparing untouched KeyWrappers the key
object inspector should be used which can be extracted form
Operator.inputObjectInspectors during initialization of the key's
ExprNodeEvaluator.
This can cause a ClassCastException when the comparator is used collections
like TreeSet.
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