Timo Walther created FLINK-7403:

             Summary: Remove expandLocalRef() before code generation
                 Key: FLINK-7403
                 URL: https://issues.apache.org/jira/browse/FLINK-7403
             Project: Flink
          Issue Type: Improvement
          Components: Table API & SQL
            Reporter: Timo Walther

Currently, we expand local references before code generation. This means that 
expressions that actually only need to be evaluated once, might be evaluated 
multiple times. We should remove the expand step where possible.

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