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https://issues.apache.org/jira/browse/CALCITE-2438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16571219#comment-16571219
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Julian Hyde commented on CALCITE-2438:
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[~vlsi], I see you've done a massive amount of work. I am trying to review a
fix to a very small bug in ten minutes before I go to bed, so I am suffocating
with the sheer amount of stuff I need to understand. How about the following:
1. Log a JIRA case with the problem you have identified (with test case or
motivating use case if applicable)
2. Discuss possible solution(s) and build consensus.
3. When there is consensus, go and implement the solution.
If you can divide the problem into smaller independent sub-problems, even
better.
> RexCall#isAlwaysTrue return incorrect result
> ---------------------------------------------
>
> Key: CALCITE-2438
> URL: https://issues.apache.org/jira/browse/CALCITE-2438
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.17.0
> Reporter: pengzhiwei
> Assignee: Julian Hyde
> Priority: Critical
> Attachments: 屏幕快照 2018-08-02 下午7.26.20.png, 屏幕快照 2018-08-02
> 下午7.34.26.png
>
>
> In the expression as followed:
> {code:java}
> ((sal IS NULL) IS NOT NULL) IS FALSE
> {code}
> The RexCall#isAlwaysTrue return true,however the correct answer is false.
> I find the reason is that there is a wrong logic in the isAlwaysTrue,when
> getKind() is IS_NOT_FALSE、IS_FALSE and IS_NOT_FALSE :
> !屏幕快照 2018-08-02 下午7.34.26.png!
> Can you have a check for me,thanks!
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