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Count(distinct col) in Windowing - Hive - [mail # user]
...Is there a reason why I can't useselect col1, col2, count(distinct col3) over (PARTITION by col4 order bycol5 ROWS BETWEEN 5 PRECEDING AND FOLLOWING) as col1 from table?I am trying to see fo...
   Author: John Omernik, 2014-05-17, 03:43
Re: ORC file in Hive 0.13 throws Java heap space error - Hive - [mail # user]
...When I created the table, I had to reduce the orc.compress.size quite a bitto make my table with many columns work. This was on Hive 0.12 (I thoughtit was supposed to be fixed on Hive 0.13, ...
   Author: John Omernik, 2014-05-16, 20:47
[expand - 3 more] - Re: Hive 0.12 ORC Heap Issues on Write - Hive - [mail # user]
...Prasanth -This is easily the best and most complete explanation I've received to anyonline posted question ever.  I know that sounds like a an overstatement,but this answer is awesome. ...
   Author: John Omernik, 2014-04-28, 11:46
HDFS Storage Locations and Hive - Hive - [mail # user]
...Given the direction HDFS is going with Storage locations as identified inhttps://issues.apache.org/jira/browse/HDFS-2832andhttps://issues.apache.org/jira/secure/attachment/12597860/20130813-...
   Author: John Omernik, 2014-03-03, 15:51
[expand - 1 more] - Re: What are all the factors that go into the number of mappers - ORC - Hive - [mail # user]
...No the size is closer to 10GB, the difference between the tables is onlyaround 2000 bytes.  I will try to get exact numbers for you soon, I amtraveling right now, but I'll get you bette...
   Author: John Omernik, 2014-02-04, 01:16
Survey: What do you use to interface with Hive? - Hive - [mail # user]
...This can be an interesting subject, I know orgs that are all over on this questions. I'd be interested in hearing what you use, how it works for you, and what you are wishing you had in your...
   Author: John Omernik, 2013-12-04, 17:31
[expand - 1 more] - Re: Table creation for logfile data - Hive - [mail # user]
...I wouldn't worry about efficiency to much:  concat('20', split(date_field, '\\/')[2], '-', split(date_field, '\\/')[1], '-', split(date_field, '\\/')[0]) as proper_date -- YYYY-MM-DD &n...
   Author: John Omernik, 2013-11-25, 00:51
Is this a Bug in from_utc_timestamp? - Hive - [mail # user]
...There are some discussions on this https://issues.apache.org/jira/browse/HIVE-3822  However, one person is stating there is not an issue with timestamp, thus I am asking this question: ...
   Author: John Omernik, 2013-11-19, 18:14
[expand - 1 more] - Re: ORC Tuning - Examples? - Hive - [mail # user]
...Yin -  Fantastic! That is exactly the type of explanation of settings I'd like to see. More than just what it does, but the tradeoffs, and how things are applied in the real world. &nbs...
   Author: John Omernik, 2013-11-13, 21:44
Suggestion for Metastore Oprerations around ORC Files - Hive - [mail # user]
...I was testing out the conversion of a table to ORC.  Using previous posts, I did alter table tablename set fileformat ORC;  This worked great  All new partitions created were ...
   Author: John Omernik, 2013-11-09, 21:18
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