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Posted to issues@spark.apache.org by "Guy Khazma (Jira)" <ji...@apache.org> on 2020/01/09 23:37:00 UTC

[jira] [Created] (SPARK-30475) File source V2: Push data filters for file listing

Guy Khazma created SPARK-30475:
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             Summary: File source V2: Push data filters for file listing
                 Key: SPARK-30475
                 URL: https://issues.apache.org/jira/browse/SPARK-30475
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: Guy Khazma
             Fix For: 3.0.0


Follow up on [SPARK-30428|https://github.com/apache/spark/pull/27112] which added support for partition pruning in File source V2.
We should also pass the {{dataFilters}} to the {{listFiles method.}}

Datasources such as {{csv}} and {{json}} do not implement the {{SupportsPushDownFilters}} trait. In order to support data skipping uniformly for all file based data sources, one can override the {{listFiles}} method in a {{FileIndex}} implementation, which consults external metadata and prunes the list of files.



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