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https://issues.apache.org/jira/browse/CALCITE-3887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17101193#comment-17101193
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Zoltan Haindrich commented on CALCITE-3887:
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Fixed in
[cecfece459b0f5f155c0498811985e083813aa20|https://github.com/apache/calcite/commit/cecfece459b0f5f155c0498811985e083813aa20]
> Filter and Join conditions may not need to retain nullability during
> simplifications
> ------------------------------------------------------------------------------------
>
> Key: CALCITE-3887
> URL: https://issues.apache.org/jira/browse/CALCITE-3887
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Reported by [~icshuo]: that there are situation in which join conditions are
> placed inside a redundant `CAST`.
> https://mail-archives.apache.org/mod_mbox/calcite-dev/202003.mbox/%3CCABYySnvtrMFWaBqM7_FgKedXELdXeCqciRJV7G4MyYN07HUOnQ%40mail.gmail.com%3E
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