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https://issues.apache.org/jira/browse/CALCITE-2178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16365106#comment-16365106
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Jesus Camacho Rodriguez commented on CALCITE-2178:
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Thanks for the feedback [~julianhyde], I have updated the PR, could you take a
look? Weeks should not be there indeed. I have rewritten the logic to use
{{TimeUnit}} and I have added a method {{canRollUp}} that accounts for the fact
that {{QUARTER}} is not in order in the enumeration.
> Extend expression simplifier to work on datetime FLOOR functions
> ----------------------------------------------------------------
>
> Key: CALCITE-2178
> URL: https://issues.apache.org/jira/browse/CALCITE-2178
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
> Fix For: 1.16.0
>
>
> Extend expression simplifier to support:
> {code}
> FLOOR(FLOOR(CAST( '2010-01-10 00:00:00' AS TIMESTAMP) TO HOUR) TO DAY) =>
> FLOOR(CAST( '2010-01-10 00:00:00' AS TIMESTAMP) TO DAY)
> {code}
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