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Posted to issues@arrow.apache.org by "Hatem Helal (JIRA)" <ji...@apache.org> on 2019/01/30 12:12:00 UTC

[jira] [Assigned] (ARROW-3769) [C++] Support reading non-dictionary encoded binary Parquet columns directly as DictionaryArray

     [ https://issues.apache.org/jira/browse/ARROW-3769?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hatem Helal reassigned ARROW-3769:
----------------------------------

    Assignee: Hatem Helal

> [C++] Support reading non-dictionary encoded binary Parquet columns directly as DictionaryArray
> -----------------------------------------------------------------------------------------------
>
>                 Key: ARROW-3769
>                 URL: https://issues.apache.org/jira/browse/ARROW-3769
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Wes McKinney
>            Assignee: Hatem Helal
>            Priority: Major
>              Labels: parquet
>             Fix For: 0.13.0
>
>
> If the goal is to hash this data anyway into a categorical-type array, then it would be better to offer the option to "push down" the hashing into the Parquet read hot path rather than first fully materializing a dense vector of {{ByteArray}} values, which could use a lot of memory after decompression



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