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https://issues.apache.org/jira/browse/TAJO-308?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13833713#comment-13833713
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Hyunsik Choi commented on TAJO-308:
-----------------------------------
I checked the specification of length function. My above comment is wrong. I'm
sorry for confusing. In the current postgresql, length function returns the
number of characters regardless of whether string contains multi bytes
characters or not.
However, like other string functions, length function should return NULL when
its input string is NULL. This semantic is the same on almost all SQL functions.
> Implement length(string) function
> ---------------------------------
>
> Key: TAJO-308
> URL: https://issues.apache.org/jira/browse/TAJO-308
> Project: Tajo
> Issue Type: Improvement
> Components: operator/function/udf
> Reporter: Hyunsik Choi
> Assignee: hyoungjunkim
> Priority: Minor
> Labels: newbie
> Attachments: TAJO-308.patch, TAJO-308_1.patch
>
>
> length(string) function returns the number of characters in string.
> {code}
> int length(string)
> {code}
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