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https://issues.apache.org/jira/browse/SPARK-23896?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-23896:
------------------------------------

    Assignee:     (was: Apache Spark)

> 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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