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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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Wenchen Fan reassigned SPARK-23896:
-----------------------------------
Assignee: Gengliang Wang
> 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
> Assignee: Gengliang Wang
> Priority: Major
> Fix For: 2.4.0
>
>
> 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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