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Posted to issues@systemml.apache.org by "Matthias Boehm (JIRA)" <ji...@apache.org> on 2016/10/10 23:07:20 UTC

[jira] [Created] (SYSTEMML-1030) Dataframe converters incorrectly use positional access

Matthias Boehm created SYSTEMML-1030:
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             Summary: Dataframe converters incorrectly use positional access
                 Key: SYSTEMML-1030
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1030
             Project: SystemML
          Issue Type: Bug
            Reporter: Matthias Boehm


Both our dataframe-matrix and dataframe-frame converters assume positional access of the __INDEX column. This is incorrect as, for example, a serialization into json and subsequent deserialization loses this order (i.e., sorts by column name). This is a bug because our converters cannot even read data frames produced by SystemML in a previous script.



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