[jira] [Assigned] (CALCITE-4325) RexSimplify/Sarg incorrectly simplifies complex expressions with NULL

["Julian Hyde (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-4325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Hyde reassigned CALCITE-4325:
------------------------------------

    Assignee: Julian Hyde

> 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.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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