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https://issues.apache.org/jira/browse/CALCITE-2840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16766432#comment-16766432
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Julian Hyde commented on CALCITE-2840:
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Can you clarify "may"? The word is ambiguous. Do you mean that it sometimes
uses narrower than it should, or it could be made narrower? I often find it
useful to use "should" in a JIRA case title, to indicate what the desired
behavior is.
Also, an example would be really useful. I don't understand "narrower".
> Simplification may use narrower UnknownAs modes during AND/OR simplification
> ----------------------------------------------------------------------------
>
> Key: CALCITE-2840
> URL: https://issues.apache.org/jira/browse/CALCITE-2840
> Project: Calcite
> Issue Type: Improvement
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
>
> Some parts of this was already working in 1.17 ; but 1.18 turned out to be a
> more conservative in this sense.
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