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https://issues.apache.org/jira/browse/VXQUERY-34?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13399773#comment-13399773
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Preston Carman commented on VXQUERY-34:
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I created a new ticket for the substring function to track this issue. Also, I
started to fix the changes suggested for string-length and ran into more
questions. I posted a question about the UTF8 string in Hyracks to get more
information
(https://groups.google.com/forum/?fromgroups#!topic/hyracks-users/ygRNTbX4eSg).
Besides the function working for all the string types, the other points 1 and 2
have been implemented. Thanks for pointing those out, I will use those
suggestions in future code.
> Basic String Functions
> -----------------------
>
> Key: VXQUERY-34
> URL: https://issues.apache.org/jira/browse/VXQUERY-34
> Project: VXQuery
> Issue Type: Sub-task
> Reporter: Preston Carman
> Labels: patch
> Attachments: BasicStringFunctions2.patch,
> BasicStringFunctions3.patch, BasicStringFunctions4.patch
>
>
> The basic string functions to build help with basic queries.
> fn:concat - Concatenates two or more xs:anyAtomicType arguments cast to
> xs:string.
> fn:string-join - Returns the xs:string produced by concatenating a sequence
> of xs:strings using an optional separator.
> fn:substring - Returns the xs:string located at a specified place within an
> argument xs:string.
> fn:string-length - Returns the length of the argument.
> fn:upper-case - Returns the upper-cased value of the argument.
> fn:lower-case - Returns the lower-cased value of the argument.
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