[jira] [Created] (FLINK-8921) Split code generated call expression

[Shang Yuanchun (Jira)]

Timo Walther created FLINK-8921:
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             Summary: Split code generated call expression
                 Key: FLINK-8921
                 URL: https://issues.apache.org/jira/browse/FLINK-8921
             Project: Flink
          Issue Type: Improvement
          Components: Table API & SQL
            Reporter: Timo Walther


In FLINK-8274 we introduced the possibility of splitting the generated code into multiple methods in order to exceed the JVMs maximum method size (see also https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.9).

At the moment we only split methods by fields, however, this is not enough in all case. We should also split expressions. I suggest to split the operands of a {{RexCall}} in {{org.apache.flink.table.codegen.CodeGenerator#visitCall}} if we reach a certain threshold. However, this should happen as lazily as possible to keep the runtime overhead low.



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