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Posted to issues@spark.apache.org by "Dongjoon Hyun (JIRA)" <ji...@apache.org> on 2019/06/09 21:02:00 UTC

[jira] [Commented] (SPARK-27546) Should repalce DateTimeUtils#defaultTimeZoneuse with sessionLocalTimeZone

    [ https://issues.apache.org/jira/browse/SPARK-27546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16859564#comment-16859564 ] 

Dongjoon Hyun commented on SPARK-27546:
---------------------------------------

Hi, [~Aron.tao]. The given example looks irrelevant to Apache Spark because it's Java `Date`'s behavior before arriving Apache Spark.
{code}
jshell> new Date(1356998400000L)
$1 ==> Mon Dec 31 16:00:00 PST 2012

jshell> TimeZone.setDefault(TimeZone.getTimeZone("UTC"))

jshell> new Date(1356998400000L)
$3 ==> Tue Jan 01 00:00:00 UTC 2013
{code}

Whatever you do in Apache Spark, `new Date` give you the value from JVM's default Timezone, doesn't it?

> Should repalce DateTimeUtils#defaultTimeZoneuse with sessionLocalTimeZone
> -------------------------------------------------------------------------
>
>                 Key: SPARK-27546
>                 URL: https://issues.apache.org/jira/browse/SPARK-27546
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Jiatao Tao
>            Priority: Minor
>         Attachments: image-2019-04-23-08-10-00-475.png, image-2019-04-23-08-10-50-247.png
>
>




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