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https://issues.apache.org/jira/browse/CALCITE-3149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17080152#comment-17080152
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Jesus Camacho Rodriguez commented on CALCITE-3149:
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[~hyuan], I have a quick question. There seem to be some places where we rely
on reference equality to compare types:
https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/rex/RexUtil.java#L2610
Is that contract still valid after this patch went in?
> CACHE in RelDataTypeFactoryImpl can't be garbage collected
> -----------------------------------------------------------
>
> Key: CALCITE-3149
> URL: https://issues.apache.org/jira/browse/CALCITE-3149
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Haisheng Yuan
> Assignee: Haisheng Yuan
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.21.0
>
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> Key and Value are pointing to the same object, even with soft value
> references, the objects in CACHE will not be garbage collected.
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