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Posted to issues@arrow.apache.org by "Wes McKinney (Jira)" <ji...@apache.org> on 2020/04/27 01:59:00 UTC

[jira] [Commented] (ARROW-7081) [R] Add methods for introspecting parquet files

    [ https://issues.apache.org/jira/browse/ARROW-7081?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17092919#comment-17092919 ] 

Wes McKinney commented on ARROW-7081:
-------------------------------------

We have most of this exposed in Python so this could provide some template for what to expose

> [R] Add methods for introspecting parquet files
> -----------------------------------------------
>
>                 Key: ARROW-7081
>                 URL: https://issues.apache.org/jira/browse/ARROW-7081
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: R
>    Affects Versions: 0.15.1
>            Reporter: Ben Kietzman
>            Assignee: Neal Richardson
>            Priority: Major
>
> Parquet files are very opaque, and it'd be handy to have an easy way to introspect them. Functions exist for loading them as a table, but information about row group level metadata and data page compression is hidden. Ideally, every structure from https://github.com/apache/parquet-format/#file-format could be examined in this fashion.



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