[jira] [Assigned] (CALCITE-4195) Cast from character to character with a different collator must be evaluated as not monotonic

["Ruben Q L (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-4195?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ruben Q L reassigned CALCITE-4195:
----------------------------------

    Assignee: Ruben Q L

> Cast from character to character with a different collator must be evaluated as not monotonic
> ---------------------------------------------------------------------------------------------
>
>                 Key: CALCITE-4195
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4195
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.24.0
>            Reporter: Ruben Q L
>            Assignee: Ruben Q L
>            Priority: Minor
>             Fix For: 1.26.0
>
>
> Problem related to the feature CALCITE-3951.
> A cast operation from a character type to another character type that has a different collator must be evaluated as not monotonic. Currently this is not the case.
> This has an impact e.g. in SortProjectTransposeRule, since we can incorrectly transpose a sort after a projection than contains such a cast, and we end up with a plan that will return a different result than the original one.



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