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From "Sudharshann D. (Jira)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-31579) Replace floorDiv by / in localRebaseGregorianToJulianDays()
Date Tue, 05 May 2020 02:50:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-31579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17099493#comment-17099493
] 

Sudharshann D. commented on SPARK-31579:
----------------------------------------

May I please work on this?

> Replace floorDiv by / in localRebaseGregorianToJulianDays()
> -----------------------------------------------------------
>
>                 Key: SPARK-31579
>                 URL: https://issues.apache.org/jira/browse/SPARK-31579
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.1.0
>            Reporter: Maxim Gekk
>            Priority: Minor
>              Labels: starter
>
> Most likely utcCal.getTimeInMillis % MILLIS_PER_DAY == 0 but need to check that for all
available time zones in the range of [0001, 2100] years with the step of 1 hour or maybe smaller.
If this hypothesis is confirmed, floorDiv can be replaced by /, and this should improve performance
of RebaseDateTime.localRebaseGregorianToJulianDays.



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