[jira] [Commented] (CALCITE-2334) Extend simplification of expressions with CEIL function over date types

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

    [ https://issues.apache.org/jira/browse/CALCITE-2334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16494419#comment-16494419 ] 

Julian Hyde commented on CALCITE-2334:
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Is it not valid to simplify {{CEIL(CEIL(x TO HOUR) TO YEAR)}} to {{CEIL(x TO YEAR)}}? Because an HOUR never crosses a YEAR boundary.

> Extend simplification of expressions with CEIL function over date types
> -----------------------------------------------------------------------
>
>                 Key: CALCITE-2334
>                 URL: https://issues.apache.org/jira/browse/CALCITE-2334
>             Project: Calcite
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 1.17.0
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Julian Hyde
>            Priority: Minor
>
> CALCITE-2332 disables simplification of CEIL function due to correctness issues.
> {{FLOOR}} and {{CEIL}} cannot be handled with the same logic. For instance, {{CEIL(CEIL(x TO HOUR) TO YEAR)}} cannot be simplified, e.g., '2011-12-31 23:59:59', while {{FLOOR(FLOOR(x TO HOUR) TO YEAR)}} can be simplified. Hence, we need new logic to enable simplification of CEIL function on date types.



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