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https://issues.apache.org/jira/browse/FLINK-8921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17032246#comment-17032246
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Timo Walther commented on FLINK-8921:
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[~aljoscha] I'm not sure if this issue can be closed. It might still exist in
the Blink planner. It was reported a couple of times by users. [~jark] has this
been addressed in Blink code gen? Can we have big expressions for one function
arg without reaching the JVM limits?
> Split code generated call expression
> -------------------------------------
>
> Key: FLINK-8921
> URL: https://issues.apache.org/jira/browse/FLINK-8921
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / Legacy Planner
> Reporter: Timo Walther
> Assignee: xueyu
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> 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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