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https://issues.apache.org/jira/browse/CALCITE-1925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16114118#comment-16114118
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Ted Xu commented on CALCITE-1925:
---------------------------------
Here https://github.com/apache/calcite/pull/507 is a rough showcase. I'll try
if I can create a test.
> JaninoRelMetadataProvider to cache null value
> ---------------------------------------------
>
> Key: CALCITE-1925
> URL: https://issues.apache.org/jira/browse/CALCITE-1925
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.13.0
> Reporter: Ted Xu
> Assignee: Julian Hyde
>
> JaninoRelMetadataProvider should cache null value to improve performance.
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