[jira] [Commented] (SPARK-8255) string function: regexp_extract

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-8255?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14631289#comment-14631289 ] 

Apache Spark commented on SPARK-8255:
-------------------------------------

User 'chenghao-intel' has created a pull request for this issue:
https://github.com/apache/spark/pull/7468

> string function: regexp_extract
> -------------------------------
>
>                 Key: SPARK-8255
>                 URL: https://issues.apache.org/jira/browse/SPARK-8255
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Reynold Xin
>            Assignee: Cheng Hao
>
> regexp_extract(string subject, string pattern, int index): string
> Returns the string extracted using the pattern. For example, regexp_extract('foothebar', 'foo(.*?)(bar)', 2) returns 'bar.' Note that some care is necessary in using predefined character classes: using '\s' as the second argument will match the letter s; '\\s' is necessary to match whitespace, etc. The 'index' parameter is the Java regex Matcher group() method index. See docs/api/java/util/regex/Matcher.html for more information on the 'index' or Java regex group() method.



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