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https://issues.apache.org/jira/browse/SPARK-8848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14944197#comment-14944197
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Apache Spark commented on SPARK-8848:
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User 'liancheng' has created a pull request for this issue:
https://github.com/apache/spark/pull/8988
> Write Parquet LISTs and MAPs conforming to Parquet format spec
> --------------------------------------------------------------
>
> Key: SPARK-8848
> URL: https://issues.apache.org/jira/browse/SPARK-8848
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 1.0.2, 1.1.1, 1.2.2, 1.3.1, 1.4.0
> Reporter: Cheng Lian
> Assignee: Cheng Lian
>
> [Parquet format PR #17|https://github.com/apache/parquet-format/pull/17]
> standardized structures of Parquet complex types (LIST & MAP). Spark SQL
> should follow this spec and write Parquet data conforming to the standard.
> Note that although currently Parquet files written by Spark SQL is
> non-standard (because Parquet format spec wasn't clear about this part when
> Spark SQL Parquet support was authored), it's still compatible with the most
> recent Parquet format spec, because the format we use is covered by the
> backwards-compatibility rules.
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