Gustavo de Morais created FLINK-38401:
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Summary: Add MultiJoin MetadataHandler for FlinkRelMdUpsertKeys
Key: FLINK-38401
URL: https://issues.apache.org/jira/browse/FLINK-38401
Project: Flink
Issue Type: Sub-task
Components: Table SQL / Planner
Affects Versions: 2.1.0
Reporter: Gustavo de Morais
Fix For: 2.2.0
We’re currently using the default implementation of getUpsertKeys which leads
to the upsertKeys not being preserved past a MultiJoin. This ticket adds
support for it so the planner properly calculates the possible upsertKeys out
of a N way join.
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