[jira] [Commented] (ARROW-4912) [C++, Python] Allow specifying column names to CSV reader

["Antoine Pitrou (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-4912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16854896#comment-16854896 ] 

Antoine Pitrou commented on ARROW-4912:
---------------------------------------

If there's no way to change column names post-hoc, then perhaps we should just add one? That sounds more universal than adding ad hoc options to the CSV reader.

As for the header_rows=0, can you open a separate issue?

> [C++, Python] Allow specifying column names to CSV reader
> ---------------------------------------------------------
>
>                 Key: ARROW-4912
>                 URL: https://issues.apache.org/jira/browse/ARROW-4912
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++, Python
>    Affects Versions: 0.12.1
>            Reporter: Philipp Moritz
>            Priority: Major
>              Labels: csv
>
> Currently I think there is no way to specify custom column names for CSV files. It's possible to specify the full schema of the file, but not just column names.
> See the related discussion here: ARROW-3722
> The goal of this is to re-use the CSV type-inference but still allow people to specify custom names for the columns. As far as I know, there is currently no way to set column names post-hoc, so we should provide a way to specify them before reading the file.
> Related to this, ParseOptions(header_rows=0) is not currently implemented.
> Is there any current way to do this or does this need to be implmented?



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