Gustavo de Morais created FLINK-37962:
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             Summary: Implement visitMultiJoin for RelTimeIndicatorConverter
                 Key: FLINK-37962
                 URL: https://issues.apache.org/jira/browse/FLINK-37962
             Project: Flink
          Issue Type: Sub-task
            Reporter: Gustavo de Morais


RelTimeIndicatorConverter traverses a RelNode tree and converts fields 
TimeIndicatorRelDataType type. If a time attribute is accessed for a 
calculation, it will be materialized.

For regular joins, we take a conservative and safe approach and materialize any 
time attributes from the input streams. The user must then explicitly define a 
new time attribute if they need one. We can do the same for a MultiJoin.



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