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https://issues.apache.org/jira/browse/SPARK-27528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17099226#comment-17099226
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Apache Spark commented on SPARK-27528:
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User 'MaxGekk' has created a pull request for this issue:
https://github.com/apache/spark/pull/28450
> Use Parquet logical type TIMESTAMP_MICROS by default
> ----------------------------------------------------
>
> Key: SPARK-27528
> URL: https://issues.apache.org/jira/browse/SPARK-27528
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.1
> Reporter: Maxim Gekk
> Assignee: Maxim Gekk
> Priority: Minor
> Fix For: 3.0.0
>
>
> Currently, Spark uses INT96 type for timestamps written to parquet files. To
> store Catalyst's Timestamp values as INT96, Spark converts microseconds since
> epoch to nanoseconds in Julian calendar. This conversion is not necessary if
> Spark saves timestamps as Parquet TIMESTAMP_MICROS logical type. The ticket
> aims to switch on TIMESTAMP_MICROS from INT96 in write by default.
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