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Posted to jira@arrow.apache.org by "Antoine Pitrou (Jira)" <ji...@apache.org> on 2022/01/05 13:58:00 UTC

[jira] [Comment Edited] (ARROW-15254) [C++] Ability to skip CSV footer when reading in dataset

    [ https://issues.apache.org/jira/browse/ARROW-15254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17469324#comment-17469324 ] 

Antoine Pitrou edited comment on ARROW-15254 at 1/5/22, 1:57 PM:
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I think this is going to be difficult to implement. CSV files are read in a streaming fashion, with possibly parallel processing of file blocks. So, say the user asks to skip 10 rows at the footer, but the last block being read only has 5 rows, how do we handle that situation?

cc [~westonpace] for ideas.


was (Author: pitrou):
I think this is going to be difficult to implement. CSV files are read in a streaming fashion, with possibly parallel processing of file blocks. So, say the user asks to skip 10 rows at the footer, but the last block being read only has 5 rows, how do we handle that situation?

> [C++] Ability to skip CSV footer when reading in dataset
> --------------------------------------------------------
>
>                 Key: ARROW-15254
>                 URL: https://issues.apache.org/jira/browse/ARROW-15254
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Nicola Crane
>            Priority: Major
>
> In ARROW-15252 a user reports wanting to be able to skip the final row of a CSV (the footer) when reading in a dataset of CSVs - is this possible to implement?



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