[jira] [Created] (FLINK-8277) Optimize code generation by using local references

[Shang Yuanchun (Jira)]

Timo Walther created FLINK-8277:
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             Summary: Optimize code generation by using local references
                 Key: FLINK-8277
                 URL: https://issues.apache.org/jira/browse/FLINK-8277
             Project: Flink
          Issue Type: Improvement
          Components: Table API & SQL
            Reporter: Timo Walther


By default, Flink uses {{org.apache.calcite.rex.RexProgram#expandLocalRef}} to remove local references which reverses the effect of common subexpression elimination. For a more performant execution and smaller generated code we should leverage common subexpressions.



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