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https://issues.apache.org/jira/browse/PARQUET-467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15125172#comment-15125172
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Deepak Majeti commented on PARQUET-467:
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I still don't get it. Can't we use the BitReader to decode BIT_PACKED values?
It looks like even the boolean decoder uses the same.
https://github.com/cloudera/Impala/blob/cdh5-trunk/be/src/exec/hdfs-parquet-scanner.cc#L860
I believe PARQUET-454 can be fixed using BitReader as well.
> Implement and test BIT_PACKED level encoding / decoding
> --------------------------------------------------------
>
> Key: PARQUET-467
> URL: https://issues.apache.org/jira/browse/PARQUET-467
> Project: Parquet
> Issue Type: Bug
> Components: parquet-cpp
> Reporter: Wes McKinney
>
> While RLE is the preferred encoding format (and BIT_PACKED is deprecated in
> Parquet 2.0), we will need to support this encoding format for legacy Parquet
> files that use it. As part of this JIRA we will verify round-tripping levels
> to this encoding format.
> See also PARQUET-462
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