[jira] [Updated] (HIVE-3299) UDF DAYNAME(date) to HIVE

["Alexander Pivovarov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-3299?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexander Pivovarov updated HIVE-3299:
--------------------------------------
    Description: 
dayname(date/timestamp/string)

Returns the name of the weekday for date. The language used for the name is English.

select dayname('2015-04-08');
Wednesday

  was:
Current releases of Hive lacks a function which would return the day name corresponding to a date / timestamp value which might be a part of a column.   
The function -DAYNAME (date) would return the day name from a date / timestamp or column which would be useful while using HiveQL. This would find its use  in various business sectors like retail, which would help in  identifying the trends and sales datails for a particular weekday for entire year,month or week.


Functionality :-

Function Name: DAYNAME (date)
	 
Returns the name of the weekday for date. 
Example: hive> SELECT DAYNAME('2012-07-25');
                   -> 'Wednesday'

Usage :-

Case 1 : To find DAY NAME corresponding to a particular date 

hive> SELECT DAYNAME('2012-07-25');

                   -> 'Wednesday'



Case 2 : To query a table to find details based on a particular day name
Table :-
date      |item id|store id    |value|unit|price

01/07/2012|110001|0011111111003|0.99|1.00|0.99

02/07/2012|110001|0011111111008|0.99|0.00|0.00

03/07/2012|110001|0011111111009|0.99|0.00|0.00

04/07/2012|110001|0011111112002|0.99|0.00|0.00

05/07/2012|110001|0011111112003|0.99|0.00|0.00

06/07/2012|110001|0011111112006|0.99|1.00|0.99

07/07/2012|110001|0011111112007|0.99|0.00|0.00

08/07/2012|110001|0011111112008|0.99|0.00|0.00

09/07/2012|110001|0011111112009|0.99|0.00|0.00

10/07/2012|110001|0011111112010|0.99|0.00|0.00

11/07/2012|110001|0011111113003|0.99|0.00|0.00

12/07/2012|110001|0011111113006|0.99|0.00|0.00

13/07/2012|110001|0011111113008|0.99|0.00|0.00

14/07/2012|110001|0011111113010|0.99|0.00|0.00

15/07/2012|110001|0011111114002|0.99|0.00|0.00

16/07/2012|110001|0011111114004|0.99|1.00|0.99

17/07/2012|110001|0011111114005|0.99|0.00|0.00

18/07/2012|110001|0011111121004|0.99|0.00|0.00




Query : select * from sales where dayname(date)='wednesday';


Result :-
04/07/2012|110001|0011111112002|0.99|0.00|0.00

11/07/2012|110001|0011111113003|0.99|0.00|0.00

18/07/2012|110001|0011111121004|0.99|0.00|0.00


> UDF  DAYNAME(date) to HIVE 
> ---------------------------
>
>                 Key: HIVE-3299
>                 URL: https://issues.apache.org/jira/browse/HIVE-3299
>             Project: Hive
>          Issue Type: New Feature
>          Components: UDF
>    Affects Versions: 0.9.0
>            Reporter: Namitha Babychan
>              Labels: patch
>         Attachments: HIVE-3299.1.patch.txt, HIVE-3299.patch.txt, Hive-3299_Testcase.doc, udf_dayname.q, udf_dayname.q.out
>
>
> dayname(date/timestamp/string)
> Returns the name of the weekday for date. The language used for the name is English.
> select dayname('2015-04-08');
> Wednesday



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