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https://issues.apache.org/jira/browse/TAJO-378?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Seungun Choe updated TAJO-378:
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Attachment: TAJO-378_4.patch
Here is new patch file that is replaced StringBuffer with StringBuilder.
> Implement concat_ws function.
> -----------------------------
>
> Key: TAJO-378
> URL: https://issues.apache.org/jira/browse/TAJO-378
> Project: Tajo
> Issue Type: New Feature
> Components: function/udf
> Affects Versions: 0.8-incubating
> Reporter: Seungun Choe
> Assignee: Seungun Choe
> Priority: Minor
> Fix For: 0.8-incubating
>
> Attachments: TAJO-378.patch, TAJO-378_1.patch, TAJO-378_2.patch,
> TAJO-378_3.patch, TAJO-378_4.patch
>
>
> This function's definition is, concat_ws(sep text, str "any" [, str "any" [,
> ...] ]).
> For example, concat_ws(',', 'abcde', 2, NULL, 22)'s result is abcde,2,22.
> Detailed description is "Concatenate all but first arguments with separators.
> The first parameter is used as a separator. NULL arguments are ignored.".
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