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Posted to issues@arrow.apache.org by "Romain François (JIRA)" <ji...@apache.org> on 2019/06/18 08:49:00 UTC
[jira] [Assigned] (ARROW-5492) [R] Add "col_select" argument to
read_* functions to read subset of columns
[ https://issues.apache.org/jira/browse/ARROW-5492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Romain François reassigned ARROW-5492:
--------------------------------------
Assignee: Romain François
> [R] Add "col_select" argument to read_* functions to read subset of columns
> ----------------------------------------------------------------------------
>
> Key: ARROW-5492
> URL: https://issues.apache.org/jira/browse/ARROW-5492
> Project: Apache Arrow
> Issue Type: Improvement
> Components: R
> Reporter: Wes McKinney
> Assignee: Romain François
> Priority: Major
> Fix For: 0.14.0
>
>
> read_feather, read_parquet, read_csv_arrow (and read_json, when it exists) should take a `col_select` argument, following the model of [vroom|http://vroom.r-lib.org/articles/vroom.html#column-selection] (readr and base R file readers also support this feature, just much more awkwardly).
> Currently, read_feather has a "columns" argument and none of the other readers expose it. Parquet can certainly support it; cf. {{pyarrow.parquet.read_table.}}
>
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