Martijn Visser created FLINK-40894:
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Summary: Expose counters for unmatched retractions in
SinkUpsertMaterializer and KeyedLookupJoinWrapper
Key: FLINK-40894
URL: https://issues.apache.org/jira/browse/FLINK-40894
Project: Flink
Issue Type: Improvement
Components: Table SQL / Runtime
Reporter: Martijn Visser
Both SinkUpsertMaterializer and KeyedLookupJoinWrapper only log when a
retraction finds no matching row or when state was cleared by TTL. Wrong
results from non-deterministic updates or a too short TTL are therefore
invisible in metrics. LateralSnapshotJoinOperator already exposes
{{numUnmatchedBuildRetractions}} for the same situation. We should add the same
counter to both operators, the V2 and the watermark compacting materializer
included.
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