xuyang created FLINK-33878:
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Summary: Many Keyed Operator extends `TableStreamOperator` which
is marked without key.
Key: FLINK-33878
URL: https://issues.apache.org/jira/browse/FLINK-33878
Project: Flink
Issue Type: Technical Debt
Components: Table SQL / Runtime
Reporter: xuyang
Many Keyed Operator like `WindowJoinOperator` and `SlicingWindowOperator`
extends `TableStreamOperator` which is marked without key.
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