[jira] [Commented] (ARROW-1796) [Python] RowGroup filtering on file level

["Wes McKinney (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-1796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17080594#comment-17080594 ] 

Wes McKinney commented on ARROW-1796:
-------------------------------------

Let's close as soon as it's documented

> [Python] RowGroup filtering on file level
> -----------------------------------------
>
>                 Key: ARROW-1796
>                 URL: https://issues.apache.org/jira/browse/ARROW-1796
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Uwe Korn
>            Assignee: Uwe Korn
>            Priority: Major
>              Labels: dataset, dataset-parquet-read, parquet, pull-request-available
>          Time Spent: 1.5h
>  Remaining Estimate: 0h
>
> We can build upon the API defined in {{fastparquet}} for defining RowGroup filters: https://github.com/dask/fastparquet/blob/master/fastparquet/api.py#L296-L300 and translate them into the C++ enums we will define in https://issues.apache.org/jira/browse/PARQUET-1158 . This should enable us to provide the user with a simple predicate pushdown API that we can extend in the background from RowGroup to Page level later on.



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