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https://issues.apache.org/jira/browse/PARQUET-622?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xu Chen resolved PARQUET-622.
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Resolution: Fixed
> 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 records have more compress rate ？
> Why do not let one RowGroup has one DictionaryData to make more duplicate
> records into dictionary .
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