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https://issues.apache.org/jira/browse/SPARK-31665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17102848#comment-17102848
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Apache Spark commented on SPARK-31665:
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User 'MaxGekk' has created a pull request for this issue:
https://github.com/apache/spark/pull/28481
> Test parquet dictionary encoding of random dates/timestamps
> -----------------------------------------------------------
>
> Key: SPARK-31665
> URL: https://issues.apache.org/jira/browse/SPARK-31665
> Project: Spark
> Issue Type: Test
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: Maxim Gekk
> Priority: Major
>
> Currently, dictionary encoding is not tested in ParquetHadoopFsRelationSuite
> test "test all data types" because dates and timestamps are uniformly
> distributed, and dictionary encoding is not applied for the types in fact.
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