[jira] [Comment Edited] (HIVE-20917) OpenCSVSerde quotes all columns

["yongzhi.shao (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-20917?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17889952#comment-17889952 ] 

yongzhi.shao edited comment on HIVE-20917 at 10/16/24 6:23 AM:
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[~zhangbutao] 

hello. can we reopen this?

We've been using this PR a lot in our production environment and it seems to work well.And it's just a small feature, we should merge it.


was (Author: lisoda):
[~zhangbutao] 

hello. can we reopen this?

> OpenCSVSerde quotes all columns
> -------------------------------
>
>                 Key: HIVE-20917
>                 URL: https://issues.apache.org/jira/browse/HIVE-20917
>             Project: Hive
>          Issue Type: Improvement
>          Components: Serializers/Deserializers
>            Reporter: nicolas paris
>            Assignee: zongyu wu
>            Priority: Minor
>              Labels: pull-request-available
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> The OpenCSVSerde produces a CSV with all its columns quoted 
> no matter of they type or if the string columns contain a separator or not.
>  
> The problem is some readers (such postgresql) are not compatible with
> such CSV, in particular when bulk loading them thought COPY statement.
>  
> I propose a new CsvSerde, based on a Univocity Parser (wich is used by Apache Spark)
> that has been described a 2 times faster thant OpenCSV. [https://github.com/uniVocity/csv-parsers-comparison] . This new CsvSerde whould only quote columns when needed.
>  
> Regards,



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