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https://issues.apache.org/jira/browse/TAJO-343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13842300#comment-13842300
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Hyunsik Choi edited comment on TAJO-343 at 12/7/13 7:20 PM:
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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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