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https://issues.apache.org/jira/browse/PARQUET-467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15125155#comment-15125155
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Wes McKinney commented on PARQUET-467:
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No, not the BIT_PACKED encoding as specified. The hybrid RLE / bit-packed
encoding has indicator values prefixing each RLE or literal run telling you
which decoding code path to use for each chunk of levels. In the case of
BIT_PACKED there are no such indicator values IIUC.
> 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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