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[jira] [Created] (FLINK-9565) Evaluating scalar UDFs in parallel

yinhua.dai created FLINK-9565:

             Summary: Evaluating scalar UDFs in parallel
                 Key: FLINK-9565
                 URL: https://issues.apache.org/jira/browse/FLINK-9565
             Project: Flink
          Issue Type: New Feature
          Components: Table API & SQL
            Reporter: yinhua.dai

As per [https://stackoverflow.com/questions/50790023/does-flink-sql-support-to-run-projections-in-parallel,] scalar UDF in the same SQL is always evaluated sequentially even when those UDF are irrelative, it may increase latency when the UDF is time consuming function.

It would be great if Flink SQL can support to run those UDF in parallel to reduce calculation latency.


cc [~fhueske]

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