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Re: Bucketing external tables - Hive - [mail # user]
...Hi Sadu  When you use bucketed map join you need to ensure that 1) Both the tables are bucketed on the join columns 2)The number of buckets should be same or multiple of each other for ...
   Author: Bejoy KS, 2013-04-16, 15:13
[HIVE-3300] LOAD DATA INPATH fails if a hdfs file with same name is added to table - Hive - [issue]
...If we are loading data from local fs to hive tables using 'LOAD DATA LOCAL INPATH' and if a file with the same name exists in the table's location then the new file will be suffixed by *_cop...
http://issues.apache.org/jira/browse/HIVE-3300    Author: Bejoy KS, 2012-12-17, 11:34
[HIVE-2918] Hive Dynamic Partition Insert - move task not considering 'hive.exec.max.dynamic.partitions' from CLI - Hive - [issue]
...Dynamic Partition insert showing an error with the number of partitions created even after the default value of 'hive.exec.max.dynamic.partitions' is bumped high to 2000.Error Message:"Faile...
http://issues.apache.org/jira/browse/HIVE-2918    Author: Bejoy KS, 2012-12-07, 08:46
Re: pblm in joining two tables in hive..... - Hive - [mail # user]
...Hi  Do a Left outer join A to B and do a null check on B's columns.  SELECT A.* FROM A LEFT OUTER JOIN B ON (...) WHERE B.clmn IS NULL.   Regards Bejoy KS  Sent from hand...
   Author: Bejoy KS, 2012-11-23, 09:49
Re: Multiuser setup on Hive - Hive - [mail # user]
...Hi Austin  In hive currently you can have permissions only on the hdfs layer not on the metastore. The current hive metastore don't have multiuser permission support. Any user will be a...
   Author: Bejoy KS, 2012-11-22, 06:50
Re: populating xml data in hive - Hive - [mail # user]
...You can use your custom mapreduce code. Just check the record type and if xml then preprocess to avoid new lines.  Regards Bejoy KS  Sent from handheld, please excuse typos.  ...
   Author: Bejoy KS, 2012-11-20, 09:03
[expand - 1 more] - Re: How does hive decide to launch how many map tasks? - Hive - [mail # user]
...Hi Chen  The property is applicable for CombineFileInputFormat and not a general one. It is not specified as a property in defaults but it is actually calculated within the framework . ...
   Author: Bejoy KS, 2012-11-19, 09:09
Re: Why hadoop job pending for so long? - Hive - [mail # user]
...Hi Chen  Hope you ensured that you have enough free slots in your queue/pool if you are using fair/capacity scheduler in your cluster.  Some times the job initialization would take...
   Author: Bejoy KS, 2012-11-16, 09:51
[expand - 1 more] - Re: Can I merge files after I loaded them into hive? - Hive - [mail # user]
...Hi Chen  You can do it in hive as well. Enable hive merge and Insert OverWrite the Partition once agin with Select *.  Hive.merge.mapfiles=true.  Regards Bejoy KS  Sent f...
   Author: Bejoy KS, 2012-11-15, 10:08
Re: Hive Join with distinct rows - Hive - [mail # user]
...Hi Praveen  Have you tried applying DISTINCT without the brackets around T1.ID  select distinct T1.ID, T1.url, T1.timestamp from T1 LEFT OUTER JOIN T2 on  T1.ID T2.ID AND &nbs...
   Author: Bejoy KS, 2012-11-09, 16:26
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