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https://issues.apache.org/jira/browse/SPARK-6775?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14615491#comment-14615491
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Apache Spark commented on SPARK-6775:
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User 'liancheng' has created a pull request for this issue:
https://github.com/apache/spark/pull/7231
> Simplify CatalystConverter class hierarchy and pass in Parquet schema
> ---------------------------------------------------------------------
>
> Key: SPARK-6775
> URL: https://issues.apache.org/jira/browse/SPARK-6775
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 1.0.2, 1.1.1, 1.2.1, 1.3.0
> Reporter: Cheng Lian
> Assignee: Cheng Lian
>
> {{CataystConverter}} classes are used to convert Parquet records to Spark SQL
> row objects. Current converter implementations have the following problems:
> # They simply ignore original Parquet schema, which makes adding Parquet
> backwards-compatibility rules impossible.
> # They are unnecessary over complicated.
> # {{SpecificMutableRow}} is only used for structs whose fields are all of
> primitive types.
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