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Posted to issues@spark.apache.org by "Liang-Chi Hsieh (JIRA)" <ji...@apache.org> on 2019/06/17 15:26:00 UTC

[jira] [Created] (SPARK-28082) Add a note to DROPMALFORMED mode of CSV for column pruning

Liang-Chi Hsieh created SPARK-28082:
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             Summary: Add a note to DROPMALFORMED mode of CSV for column pruning
                 Key: SPARK-28082
                 URL: https://issues.apache.org/jira/browse/SPARK-28082
             Project: Spark
          Issue Type: Documentation
          Components: PySpark, SQL
    Affects Versions: 3.0.0
            Reporter: Liang-Chi Hsieh


This is inspired by SPARK-28058.

When using {{DROPMALFORMED}} mode, corrupted records aren't dropped if malformed columns aren't read. This behavior is due to CSV parser column pruning. Current doc of {{DROPMALFORMED}} doesn't mention the effect of column pruning. Users will be confused by the fact that {{DROPMALFORMED}} mode doesn't work as expected.





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