[
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:
--------------------------------------
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.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
