[jira] [Created] (SPARK-10803) Allow users to write and query Parquet user-defined key-value metadata directly

["Cheng Lian (JIRA)" <ji...@apache.org>]

Cheng Lian created SPARK-10803:
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             Summary: Allow users to write and query Parquet user-defined key-value metadata directly
                 Key: SPARK-10803
                 URL: https://issues.apache.org/jira/browse/SPARK-10803
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 1.5.0, 1.4.1, 1.3.1, 1.2.2, 1.1.1, 1.0.2
            Reporter: Cheng Lian


Currently Spark SQL only allows users to set and get per-column metadata of a DataFrame. This metadata can be then persisted to Parquet as part of Catalyst schema information contained in the user-defined key-value metadata. It would be nice if we can allow users to write and query Parquet user-defined key-value metadata directly. Or maybe a more general way to allow DataFrame level (rather than column level) metadata.



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