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Re: FAILED: Error in metadata - Hive - [mail # user]
...Hi Yogesh  It looks like hive is still on the derby db . Can you restar t your hive instances after updating the hive-site.xml. Also please mak e sure that you are modifying the right c...
   Author: Bejoy KS, 2012-09-09, 09:21
Re: How to load csv data into HIVE - Hive - [mail # user]
...Hi Chuck  I believe Praveenesh was adding his thought to the discussion on preprocessing the data using mapreduce itself. If you go with hadoop streaming you can use the python script i...
   Author: Bejoy KS, 2012-09-08, 12:33
Re: Changing Hive default representation of nulls from \N to something else - Hive - [mail # user]
...Hi Charles  You may need to replace the NULLS with 'NULL' s tring .   INSERT OVERWRITE staging_table SELECT ... CASE WHEN clm n_1 IS NULL THEN "NULL" else clmn_1 ...   Thank Y...
   Author: Bejoy KS, 2012-09-07, 07:06
Re: How to get percentage of each group? - Hive - [mail # user]
...Hi  CROSS JOIN is same as giving JOIN keyword. CROSS JOIN just a new  notation in later releases of hive. JOIN without ON is same as CROSS JOIN    Regards, Bejoy KS   ________...
   Author: Bejoy KS, 2012-09-07, 06:59
Re: Unexpected end of input stream - Hive - [mail # user]
...Hi Kiwon  You can get this information from the jobdetails web page itself. Browse to your failed task and there you can see the details on which file/block it had processed and failed ...
   Author: Bejoy KS, 2012-08-28, 16:32
Re: alter external table location with new namenode address - Hive - [mail # user]
...Yes you need to update the metastore db directly for this to be in effect.  Regards Bejoy KS  Sent from handheld, please excuse typos.  From: Alok Kumar  Date: Fri, 24 Au...
   Author: Bejoy KS, 2012-08-24, 12:10
Re: move Hive from one distribution to another - Hive - [mail # user]
...Hi Anson  Hive has the EXPORT IMPORT feature  since 0.8 that EXPORTs  the table structure as well as data into a file which can be used for I MPORTing back to a new instance. A sam...
   Author: Bejoy KS, 2012-08-21, 17:23
Re: how to handling complex log file(compressed, 200G) - Hive - [mail # user]
...Hi Kiwon Lee  There isn't anything specific you need to do in hive DDL or DML to parse gz files. You need to ensure that 'org.apache.hadoop.io.compress.GzipCodec' is availabe in 'io.com...
   Author: Bejoy KS, 2012-08-17, 19:23
Re: UNION ALL - what is the simplest form - Hive - [mail # user]
...Hi Anand  You necessarily don't need to go in for UNION ALL for your requirement.  Use INSERT INTO instead, which has less overhead. It is supported from hive 0.8 .  INSERT IN...
   Author: Bejoy KS, 2012-08-16, 07:42
Re: how to do random sampling in hive? - Hive - [mail # user]
...Hi,  To get more accurate sampling, you need to bucketize your table based on the columns you wish to use in sampling. Also use the TABLESAMPLE clause while getting the required sample ...
   Author: Bejoy KS, 2012-08-15, 16:04
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