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Posted to dev@hive.apache.org by "Arun A K (JIRA)" <ji...@apache.org> on 2013/01/28 13:35:13 UTC
[jira] [Commented] (HIVE-3850) hour() function returns 12 hour
clock value when using timestamp datatype
[ https://issues.apache.org/jira/browse/HIVE-3850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13564233#comment-13564233 ]
Arun A K commented on HIVE-3850:
--------------------------------
[~pieterjan],
I have checked the following 4 queries,
1) select hour('1:58:59') FROM myTable;
Result >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 1
2) select hour('13:58:59') FROM myTable;
Result >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 13
3) select hour('2009-07-30 10:58:59') FROM myTable;
Result >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 10
4) select hour('2009-07-30 14:58:59') FROM myTable;
Result >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 14
I have got the response in 24 hour clock time aswell.
Have I interpretted it wrong? Please comment on the same.
> hour() function returns 12 hour clock value when using timestamp datatype
> -------------------------------------------------------------------------
>
> Key: HIVE-3850
> URL: https://issues.apache.org/jira/browse/HIVE-3850
> Project: Hive
> Issue Type: Bug
> Components: UDF
> Affects Versions: 0.9.0
> Reporter: Pieterjan Vriends
>
> Apparently UDFHour.java does have two evaluate() functions. One that does accept a Text object as parameter and one that does use a TimeStampWritable object as parameter. The first function does return the value of Calendar.HOUR_OF_DAY and the second one of Calendar.HOUR. In the documentation I couldn't find any information on the overload of the evaluation function. I did spent quite some time finding out why my statement didn't return a 24 hour clock value.
> Shouldn't both functions return the same?
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