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https://issues.apache.org/jira/browse/SPARK-31398?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-31398.
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Fix Version/s: 3.0.0
Resolution: Fixed
Issue resolved by pull request 28169
[https://github.com/apache/spark/pull/28169]
> Speed up reading dates in ORC
> -----------------------------
>
> Key: SPARK-31398
> URL: https://issues.apache.org/jira/browse/SPARK-31398
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Maxim Gekk
> Assignee: Maxim Gekk
> Priority: Major
> Fix For: 3.0.0
>
>
> Currently, ORC datasource converts values of DATE type to java.sql.Date and
> the result to days since the epoch in Proleptic Gregorian calendar. ORC
> datasource does such conversion whenÂ
> spark.sql.orc.enableVectorizedReader is set to false.
> The conversion to java.sql.Date is not necessary because we can use
> DaysWritable which performs rebasing in much more optimal way.
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