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Re: Java methods from within a Hive query - Hive - [mail # user]
...Hi,  Would reflection be the answer for your question? http://hive.apache.org/docs/r0.9.0/udf/reflect.html  This is a UDF but a very flexible one.  Regards  Bertrand &nbs...
   Author: Bertrand Dechoux, 2012-09-04, 14:54
[expand - 2 more] - Re: HiveServer can not handle concurrent requests from more than one client? - Hive - [mail # user]
...Thanks a lot.  fetching other people's result sets instead of your own. I hadn't thought about that, only about the states of variables. That consequence isn't nice. It won't be a secur...
   Author: Bertrand Dechoux, 2012-08-27, 22:27
Re: Long running Join Query - Reduce task fails due to failing to report status - Hive - [mail # user]
...It is not clear from your post but your job is always failing during the same step? Or only sometimes? Or only once? Since it's a hive query I would modify it to find the root cause.  F...
   Author: Bertrand Dechoux, 2012-08-24, 18:11
Re: writing your own custom map-reduce to scan a table - Hive - [mail # dev]
...Hi,  I am not sure to understand why this question is asked in the dev mailing list of hive. You will have more answer using common hadoop or hbase mailing lists.  The answer is th...
   Author: Bertrand Dechoux, 2012-08-20, 07:22
Re: Identifying and Marking records as duplicates - Hive - [mail # user]
...If I understand correctly : A cross join on fld1 thru fld4 with order by timestamp and take the first of each group. would allow you to have all the unique and original copies.  But ind...
   Author: Bertrand Dechoux, 2012-08-17, 15:54
Re: Help with Join involving Non-Equality condition - Hive - [mail # user]
...What are the data volume? And what are the meaning of those data?  could be used because you should not have that many pack creation (But I am not sure how to enforce that.) I so filter...
   Author: Bertrand Dechoux, 2012-08-17, 05:52
Re: count(*) vs count(1) in hive - Hive - [mail # user]
...count(1) is the old one count(*) is the new one  see https://issues.apache.org/jira/browse/HIVE-287  I guess when you can use the newer, you should use it.  Bertrand  On ...
   Author: Bertrand Dechoux, 2012-08-15, 00:56
[expand - 1 more] - Re: OPTIMIZING A HIVE QUERY - Hive - [mail # user]
...Mapreduce job. In the general case, yes. BUT if one side of your join is small enough (ie you can keep all in memory), a hash join/map join can be performed which is much more performant (no...
   Author: Bertrand Dechoux, 2012-08-14, 18:12
Re: NOT IN clause in Hive - Hive - [mail # user]
...According to the error message, you are not using the correct synthax : https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Select#LanguageManualSelect-ALLandDISTINCTClauses &nbs...
   Author: Bertrand Dechoux, 2012-08-14, 09:20
[expand - 1 more] - Re: Nested Select Statements - Hive - [mail # user]
...I don't have a hive shell under my hands. What's the planning?  It should be doable with a single MapReduce if the cross join is constructed as a 'HashJoin'. Is that the case? I am curi...
   Author: Bertrand Dechoux, 2012-08-09, 21:19
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