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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2018/04/08 18:58:00 UTC
[jira] [Commented] (SPARK-23896) Improve PartitioningAwareFileIndex
[ https://issues.apache.org/jira/browse/SPARK-23896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16429850#comment-16429850 ]
Apache Spark commented on SPARK-23896:
--------------------------------------
User 'gengliangwang' has created a pull request for this issue:
https://github.com/apache/spark/pull/21004
> Improve PartitioningAwareFileIndex
> ----------------------------------
>
> Key: SPARK-23896
> URL: https://issues.apache.org/jira/browse/SPARK-23896
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.3.1
> Reporter: Gengliang Wang
> Priority: Major
>
> Currently `PartitioningAwareFileIndex` accepts an optional parameter `userPartitionSchema`. If provided, it will combine the inferred partition schema with the parameter.
> However,
> 1. to get the inferred partition schema, we have to create a temporary file index.
> 2. to get `userPartitionSchema`, we need to combine inferred partition schema with `userSpecifiedSchema`
> Only after that, a final version of `PartitioningAwareFileIndex` is created.
>
> This can be improved by passing `userSpecifiedSchema` to `PartitioningAwareFileIndex`.
> With the improvement, we can reduce redundant code and avoid parsing the file partition twice.
>
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