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https://issues.apache.org/jira/browse/CALCITE-4325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Igor Lozynskyi updated CALCITE-4325:
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Attachment: (was: rex-simplify-issue-tests.patch)
> RexSimplify/Sarg incorrectly simplifies complex expressions with NULL
> ---------------------------------------------------------------------
>
> Key: CALCITE-4325
> URL: https://issues.apache.org/jira/browse/CALCITE-4325
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.26.0
> Environment: All environments
> Reporter: Igor Lozynskyi
> Assignee: Julian Hyde
> Priority: Major
> Attachments: rex-simplify-issue-tests-2.patch
>
>
> In Calcite 1.26, the Rex expressions like follows:
> {code:java}
> (deptno = 20 OR deptno IS NULL) AND deptno = 10{code}
> Are simplified to:
> {code:java}
> deptno IS NULL{code}
> Instead of:
> {code:java}
> FALSE{code}
> Similarly, the following expression:
> {code:java}
> (deptno <> 20 OR deptno IS NULL) AND deptno = 10{code}
> Is simplified to:
> {code:java}
> deptno = 10 OR deptno IS NULL{code}
> Instead of:
> {code:java}
> deptno = 10{code}
> A diff with related unit tests (for RelBuilderTest.java) is in the attachment.
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