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Posted to issues@flink.apache.org by "lincoln lee (Jira)" <ji...@apache.org> on 2023/04/13 01:30:00 UTC

[jira] [Closed] (FLINK-28484) UniqueKey inference should respect the semantics of null as well as consider the possibility of precision loss from implicit conversions

     [ https://issues.apache.org/jira/browse/FLINK-28484?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

lincoln lee closed FLINK-28484.
-------------------------------
    Resolution: Not A Bug

This is not a bug after revisit the code

> UniqueKey inference should respect the semantics of null as well as consider the possibility of precision loss from implicit conversions
> ----------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-28484
>                 URL: https://issues.apache.org/jira/browse/FLINK-28484
>             Project: Flink
>          Issue Type: Bug
>          Components: Table SQL / Planner
>    Affects Versions: 1.15.1
>            Reporter: lincoln lee
>            Priority: Minor
>
> FLINK-15313 introduces a new branch in UniqueKey inference of projection, but does not respect the semantics of null and does not consider the possible loss of precision due to implicit conversion, which may lead to a wrong determination of whether a column is unique or not, and consequently to a wrong execution plan.



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