[jira] [Created] (PARQUET-622) Each RowGroup has one DictionaryData

[Xu Chen (JIRA)]

Xu Chen created PARQUET-622:
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             Summary: Each RowGroup has one DictionaryData
                 Key: PARQUET-622
                 URL: https://issues.apache.org/jira/browse/PARQUET-622
             Project: Parquet
          Issue Type: Improvement
          Components: parquet-format
            Reporter: Xu Chen


If using dictionary more of duplicate record have more compress rate ？

Why do not let one RowGroup has one DictionaryData to make more duplicate 
record into dictionary 



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