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https://issues.apache.org/jira/browse/HIVE-3559?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinaya Varghese reassigned HIVE-3559:
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Assignee: Vinaya Varghese (was: Meenu K Chandran)
> UDF RIGHT(string,position) to HIVE
> -----------------------------------
>
> Key: HIVE-3559
> URL: https://issues.apache.org/jira/browse/HIVE-3559
> Project: Hive
> Issue Type: New Feature
> Components: UDF
> Affects Versions: 0.9.0
> Reporter: Vinaya Varghese
> Assignee: Vinaya Varghese
> Priority: Minor
> Attachments: HIVE-3559.1.patch.txt, udf_right.q, udf_right.q.out
>
>
> Introduction
> UDF (User Defined Function) to obtain the rightmost 'n' characters from
> a string in HIVE.
> Relevance
> Current releases of Hive lacks a function which would returns the
> rightmost len characters from the string str, or NULL if any argument is
> NULL. The function LEFT(string,length) would return the rightmost 'length'
> characters from the string 'string' , or NULL if any argument is NULL which
> would be useful while using HiveQL. This would find its use in all the
> technical aspects where the concept of strings are used.
> Functionality :-
> Function Name: RIGHT(string,length)
>
> Returns the rightmost 'length' characters from the string or NULL if any
> argument is NULL.
> Example: hive>SELECT LEFT('https://www.irctc.com',3);
> -> 'com'
> Usage :-
> Case 1: To query a table to find details based on an https request
> Table :-Transaction
> Request_id|date|period_id|url_name
> 0001|01/07/2012|110001|https://www.irctc.com
> 0002|02/07/2012|110001|https://nextstep.tcs.com
> 0003|03/07/2012|110001|https://www.hdfcbank.com
> 0005|01/07/2012|110001|http://www.lmnm.org
> 0006|08/07/2012|110001|http://nextstart.gov
> 0007|10/07/2012|110001|https://netbanking.icicibank.com
> 0012|21/07/2012|110001|http://www.people.nic
> 0026|08/07/2012|110001|http://nextprobs.gov
> 00023|25/07/2012|110001|https://netbanking.canarabank.com
> Query : select * from transaction where RIGHT(url_name,3)='com';
> Result :-
> 0001|01/07/2012|110001|https://www.irctc.com
> 0002|02/07/2012|110001|https://nextstep.tcs.com
> 0003|03/07/2012|110001|https://www.hdfcbank.com
> 0007|10/07/2012|110001|https://netbanking.icicibank.com
> 00023|25/07/2012|110001|https://netbanking.canarabank.com
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