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https://issues.apache.org/jira/browse/ARROW-3769?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-3769.
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Resolution: Fixed
Issue resolved by pull request 3721
[https://github.com/apache/arrow/pull/3721]
> [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, pull-request-available
> Fix For: 0.13.0
>
> Time Spent: 13h 50m
> Remaining Estimate: 0h
>
> 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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