[jira] [Updated] (TAJO-343) Implement locate function

["KyoungBok Lee (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAJO-343?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

KyoungBok Lee updated TAJO-343:
-------------------------------

    Attachment: TAJO-343.patch

> 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.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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