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Posted to issues@arrow.apache.org by "Joris Van den Bossche (Jira)" <ji...@apache.org> on 2020/04/01 19:03:00 UTC

[jira] [Commented] (ARROW-2801) [Python][C++][Dataset] Implement splt_row_groups for ParquetDataset

    [ https://issues.apache.org/jira/browse/ARROW-2801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17073103#comment-17073103 ] 

Joris Van den Bossche commented on ARROW-2801:
----------------------------------------------

The datasets API now provides a {{ParquetFragment.get_row_group_fragments()}} method to split fragments per file further up into fragments per row group. I think that should cover the requested functionality here?

> [Python][C++][Dataset] Implement splt_row_groups for ParquetDataset
> -------------------------------------------------------------------
>
>                 Key: ARROW-2801
>                 URL: https://issues.apache.org/jira/browse/ARROW-2801
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: Python
>            Reporter: Robbie Gruener
>            Priority: Minor
>              Labels: dataset, dataset-parquet-read, parquet, pull-request-available
>          Time Spent: 1h 50m
>  Remaining Estimate: 0h
>
> Currently the split_row_groups argument in ParquetDataset yields a not implemented error. An easy and efficient way to implement this is by using the summary metadata file instead of opening every footer file



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