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Re: Hive Query - Hive - [mail # user]
...Use a semi-join, which is more or less the same thing.. You might also see if the having clause will help.  dean  On Fri, Jul 12, 2013 at 6:13 AM, Manickam P  wrote:   &n...
   Author: Dean Wampler, 2013-07-12, 13:46
Re: Hive - UDF - Hive - [mail # user]
...The problem might be Java's limitation on having a single top-level class in each file (as opposed to classes nested within a top-level class). You would have to nest your UDFs in such a top...
   Author: Dean Wampler, 2013-07-09, 12:53
[expand - 1 more] - Re: Partition performance - Hive - [mail # user]
...How big were the files in each case in your experiment? Having lots of small files will add Hadoop overhead.  Also, it would be useful to know the execution times of the map and reduce ...
   Author: Dean Wampler, 2013-07-03, 13:51
Re: Performance difference between tuning reducer num and partition table - Hive - [mail # user]
...What happens if you don't set the number of reducers in the 1st run? How many reducers are executed. If it's a much smaller number, the extra overhead could matter. Another clue is the size ...
   Author: Dean Wampler, 2013-06-29, 14:01
[expand - 1 more] - Re: Question regarding nested complex data type - Hive - [mail # user]
...;) I actually thought it was a clever choice on Hive's part. There's no real need for the 2nd tier separators, despite the nested collections!  However, it's still tricky to know what H...
   Author: Dean Wampler, 2013-06-21, 18:23
Re: Hive built-in functions not working - Hive - [mail # user]
...You could add the ADD JAR statements to your hive scripts or for your interact sessions, put them in ~/.hiverc.  On Fri, Jun 21, 2013 at 12:37 PM, fab wol  wrote:    Dean...
   Author: Dean Wampler, 2013-06-21, 18:19
Re: Create table like with partitions - Hive - [mail # user]
...I confirmed it is a pirate site.  Sent from my rotary phone.   On Jun 11, 2013, at 10:33 AM, Edward Capriolo  wrote:  ...
   Author: Dean Wampler, 2013-06-11, 18:04
[expand - 2 more] - Re: Difference between like %A% and %a% - Hive - [mail # user]
...If backwards compatibility wasn't an issue, the hive code that implements LIKE could be changed to convert the fields and LIKE strings to lower case before comparing ;) Of course, there is o...
   Author: Dean Wampler, 2013-05-24, 15:41
Re: Hive skipping first line - Hive - [mail # user]
...Since you have a text file, have you visually inspected the first few lines to make sure there's nothing unusual, like a missing line feed, field separator, or anything like that? The missin...
   Author: Dean Wampler, 2013-05-23, 12:01
[expand - 1 more] - Re: hive.metastore.warehouse.dir - Should it point to a physical directory - Hive - [mail # user]
...No, you only need a directory in HDFS, which will be "virtually located" somewhere in your cluster automatically by HDFS.  Also there's a typo in your hive.xml:      Shou...
   Author: Dean Wampler, 2013-05-21, 18:06
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