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https://issues.apache.org/jira/browse/CALCITE-5703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17723441#comment-17723441
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Evgeny Stanilovsky commented on CALCITE-5703:
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[~Sergey Nuyanzin] if PR will be accepted and explicit cast is a workaround for
FLINK issues seems it can`t be a stopper for further merging, isn`t it ?
Also do we need to fill the issue for updating janino ver ?
> Reduce amount of generated runtime code
> ---------------------------------------
>
> Key: CALCITE-5703
> URL: https://issues.apache.org/jira/browse/CALCITE-5703
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.34.0
> Reporter: Evgeny Stanilovsky
> Assignee: Evgeny Stanilovsky
> Priority: Major
> Labels: patch-available
>
> In some cases runtime generates code like :
> {noformat}
> return case_when_value == null ? (String) null : some_oparation();
> or
> return input_value == null ? (Long) null : Long.valueOf(...;
> {noformat}
> this redundant casting probably not harmful, but there is another side -
> maximum method size, this size jdk[1], janino [2] throws : *Code grows beyond
> 64 KB* . This PR reduces code generated by calcite runtime thus more huge
> expressions can be executed.
> [1]
> https://github.com/openjdk/jdk/blob/d22bcc813eea719b817d3d541a843594675c0ca9/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassFile.java#L101
> [2]
> https://github.com/janino-compiler/janino/blob/e69022f5aaabd36edc08a2074360d62514493a19/janino/src/main/java/org/codehaus/janino/CodeContext.java#L699
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