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https://issues.apache.org/jira/browse/CALCITE-2730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16715020#comment-16715020
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Stamatis Zampetakis commented on CALCITE-2730:
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OK, now I see better. Probably it is the line
[1873|https://github.com/apache/calcite/blob/f3655e15a11a9fb266af290cb390e690d4301c09/core/src/main/java/org/apache/calcite/rex/RexSimplify.java#L1873]
which causes the problem after the fix of equals. So the question is should we
really replace all terms or just the term in question. I am looking a bit more.
> RelBuilder simplifies a filter with duplicate conjunction to empty
> ------------------------------------------------------------------
>
> Key: CALCITE-2730
> URL: https://issues.apache.org/jira/browse/CALCITE-2730
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: next
> Reporter: Stamatis Zampetakis
> Assignee: Julian Hyde
> Priority: Major
> Fix For: 1.18.0
>
>
> Regression from 1.17.
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