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From "Hyunsik Choi (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (TAJO-343) Implement locate function
Date Sat, 07 Dec 2013 19:22:35 GMT

    [ https://issues.apache.org/jira/browse/TAJO-343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13842300#comment-13842300
] 

Hyunsik Choi edited comment on TAJO-343 at 12/7/13 7:20 PM:
------------------------------------------------------------

KyoungBok,

I'm sorry for the late reply. You seems to solve your questions. 

+1 for this patch. I like the function specification that you completed. The patch looks great
for me, and it includes very well written unit tests.


was (Author: hyunsik):
KyoungBok,

I'm sorry for the late reply. +1 for this patch. The patch looks great for me, and it includes
very well written unit tests.

> Implement locate function
> -------------------------
>
>                 Key: TAJO-343
>                 URL: https://issues.apache.org/jira/browse/TAJO-343
>             Project: Tajo
>          Issue Type: New Feature
>          Components: operator/function/udf
>            Reporter: Hyunsik Choi
>            Assignee: KyoungBok Lee
>            Priority: Minor
>             Fix For: 0.8-incubating
>
>         Attachments: TAJO-343.2.patch, TAJO-343.patch
>
>
> h3. Function definition
> {code}
> int4 locate(string text, substr text, [, pos])
> {code}
> h3. Description
> Returns the position of the first occurance of substr in str after position pos
>  * The result is one-based index.
>  * If string or substr is null, the result should be null.
>  * *pos* is one-based index.
>  * *pos* cannot be a negative integer.
>  * If 0 is given to *pos*, the function considers that pos is 1.
>  * If there is no pos, the function considers that pos is 1.
>  * If there is no matched substring, the result should be 0.
> h3. Example
> {code}
> SELECT locate('foobarbar', 'bar',5);
> -> 7
> {code}



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