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Posted to issues@spark.apache.org by "Gengliang Wang (JIRA)" <ji...@apache.org> on 2018/04/08 18:53:00 UTC

[jira] [Created] (SPARK-23896) Improve PartitioningAwareFileIndex

Gengliang Wang created SPARK-23896:
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             Summary: 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


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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