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https://issues.apache.org/jira/browse/PARQUET-555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15178313#comment-15178313
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Deepak Majeti commented on PARQUET-555:
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If I understood it correctly,
PLAIN_DICTIONARY: 1 PLAIN encoded Dictionary page with the dictionary values
followed by rle-encoded Data pages with corresponding indices (4 byte
integers).
RLE_DICTIONARY: rle encoded Data pages with indices (4 byte integers). (There
is no dictionary associated)
> Encoding::PLAIN_DICTIONARY is unhandled in ColumnReader
> -------------------------------------------------------
>
> Key: PARQUET-555
> URL: https://issues.apache.org/jira/browse/PARQUET-555
> Project: Parquet
> Issue Type: Bug
> Components: parquet-cpp
> Reporter: Wes McKinney
> Assignee: Deepak Majeti
>
> See parquet-format re: PLAIN_DICTIONARY / RLE_DICTIONARY distinction — our
> handling of the page metadata is not consistent with the format.
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