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https://issues.apache.org/jira/browse/PARQUET-574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15220566#comment-15220566
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Ryan Blue commented on PARQUET-574:
-----------------------------------
[~fmilo], the length is [added in the
writer|https://github.com/Parquet/parquet-mr/blob/master/parquet-column/src/main/java/parquet/column/values/rle/RunLengthBitPackingHybridValuesWriter.java#L68].
> Boolean format in Plain Decoder
> --------------------------------
>
> Key: PARQUET-574
> URL: https://issues.apache.org/jira/browse/PARQUET-574
> Project: Parquet
> Issue Type: Improvement
> Reporter: Fabrizio Milo
> Priority: Trivial
>
> In the encoding.md document is written that the plain encoder for boolean
> uses
> [RLE/BitPacking](https://github.com/apache/parquet-format/blob/master/Encodings.md#plain-plain--0)
>
> While in the cpp implementation seems is just using [simple bit decoding back
> to
> back.](https://github.com/apache/parquet-cpp/blob/master/src/parquet/encodings/plain-encoding.h#L151)
> Which one is the right format ?
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