[jira] [Commented] (DRILL-8402) Add REGEXP_EXTRACT Function

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-8402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17691361#comment-17691361 ] 

ASF GitHub Bot commented on DRILL-8402:
---------------------------------------

cgivre opened a new pull request, #2762:
URL: https://github.com/apache/drill/pull/2762

   # [DRILL-8402](https://issues.apache.org/jira/browse/DRILL-8402): Add REGEXP_EXTRACT Function
   
   ## Description
   Adds `regexp_extract` functions to Drill.
   
   ## Documentation
   This PR adds support for `regexp_extract(<text>, <pattern>)` which returns an array of text corresponding with the capturing groups in the regex.  It also includes `regexp_extract(<text>, <pattern>, <index>)` which returns the text of a specific capturing group.
   
   ```sql
   SELECT regexp_extract('123-456-789', '([0-9]{3})-([0-9]{3})-([0-9]{3})');
   +---------------------+
   |       EXPR$0        |
   +---------------------+
   | ["123","456","789"] |
   +---------------------+
   
   SELECT regexp_extract('123-456-789', '([0-9]{3})-([0-9]{3})-([0-9]{3})', 0);
   +-------------+
   |   EXPR$0    |
   +-------------+
   | 123-456-789 |
   +-------------+
   
   SELECT regexp_extract('123-456-789', '([0-9]{3})-([0-9]{3})-([0-9]{3})', 3);
   +--------+
   | EXPR$0 |
   +--------+
   | 789    |
   +--------+
   ```
   
   
   ## Testing
   Added unit tests.
   




> Add REGEXP_EXTRACT Function
> ---------------------------
>
>                 Key: DRILL-8402
>                 URL: https://issues.apache.org/jira/browse/DRILL-8402
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Functions - Drill
>    Affects Versions: 1.21.0
>            Reporter: Charles Givre
>            Assignee: Charles Givre
>            Priority: Major
>             Fix For: 1.21.0
>
>
> This PR adds two UDFs to Drill:
> regexp_extract(<text>, <pattern>) which returns an array of strings which were captured by capturing groups in the regex.
> regexp_extract(<text>, <pattern>, <index>) returns the text captured by a specific capturing group. 



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