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Posted to issues@spark.apache.org by "Reynold Xin (JIRA)" <ji...@apache.org> on 2017/03/07 22:30:38 UTC

[jira] [Created] (SPARK-19854) Refactor file partitioning strategy to make it easier to extend / unit test

Reynold Xin created SPARK-19854:
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             Summary: Refactor file partitioning strategy to make it easier to extend / unit test
                 Key: SPARK-19854
                 URL: https://issues.apache.org/jira/browse/SPARK-19854
             Project: Spark
          Issue Type: New Feature
          Components: SQL
    Affects Versions: 2.1.0
            Reporter: Reynold Xin
            Assignee: Reynold Xin


The way we currently do file partitioning strategy is hard coded in FileSourceScanExec. This is not ideal for two reasons:

1. It is difficult to unit test the default strategy. In order to test this, we need to do almost end-to-end tests by creating actual files on the file system.

2. It is difficult to experiment with different partitioning strategies without adding a lot of if branches.

The goal of this story is to create an internal interface for this so we can make this pluggable for both better testing and experimentation.




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