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https://issues.apache.org/jira/browse/PARQUET-433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15113402#comment-15113402
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Wes McKinney commented on PARQUET-433:
--------------------------------------

[~asandryh] This is completed in 
https://github.com/wesm/parquet-cpp/commit/8ea406bea87eb0d4b337a1680eaef72ad44c9ad4
 . Take a look and let me know if that's what you had in mind

here is the pull request which includes the 3 other in-flight patches 
(including PARQUET-418) https://github.com/apache/parquet-cpp/pull/22

> Specialize ColumnReaders based on the column type
> -------------------------------------------------
>
>                 Key: PARQUET-433
>                 URL: https://issues.apache.org/jira/browse/PARQUET-433
>             Project: Parquet
>          Issue Type: Improvement
>          Components: parquet-cpp
>            Reporter: Aliaksei Sandryhaila
>
> ColumnReader class is used to read columns of all types. This leads to a lot 
> of type checking and 'switch' statements. ColumnReaders should be specialized 
> to different types, while sharing the same interface.



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