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https://issues.apache.org/jira/browse/ARROW-11164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17332339#comment-17332339
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Andrew Lamb commented on ARROW-11164:
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Migrated to github: https://github.com/apache/arrow-datafusion/issues/144
> [Rust][DataFusion] Implement optional second argument to ltrim and rtrim
> functions
> ----------------------------------------------------------------------------------
>
> Key: ARROW-11164
> URL: https://issues.apache.org/jira/browse/ARROW-11164
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Rust - DataFusion
> Reporter: Andrew Lamb
> Priority: Minor
> Labels: GoodForNewContributors
> Attachments: 103891510-f84d8800-50b7-11eb-929e-94f56c2364cd.png
>
>
> https://github.com/apache/arrow/pull/9108 adds the ltrim and rtrim functions
> to datafusion, following postgres. However, postgres offers a second optional
> argument (the character to trim) that is not yet implemented, as described on
> https://www.postgresql.org/docs/9.1/functions-string.html
> For example:
> !103891510-f84d8800-50b7-11eb-929e-94f56c2364cd.png!
> This ticket tracks the work to add support for the second optional arguments
> (what character to trim) - it would probably be a good introductory item for
> new contributors.
> There is more context here:
> https://github.com/apache/arrow/pull/9108#pullrequestreview-563440252
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