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Re: An explanation of LEFT OUTER JOIN and NULL values - Hive - [mail # user]
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...Hi David, The default partitioner used in map reduce is the hash partitioner. So based on your keys they are send to a particular reducer. May be in your current data set, the ke...
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Author: bejoy_ks@...,
2013-01-24, 19:39
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Re: An explanation of LEFT OUTER JOIN and NULL values - Hive - [mail # user]
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...Hi David An explain extended would give you the exact pointer. From my understanding, this is how it could work. You have two tables then two different map reduce jo...
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Author: bejoy_ks@...,
2013-01-24, 17:16
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Re: Mapping HBase table in Hive - Hive - [mail # user]
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...Hi Ibrahim. SQOOP is used to import data from rdbms to hbase in your case. Please get the schema from hbase for your corresponding table and post it here. We can point ou...
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Author: bejoy_ks@...,
2013-01-13, 09:23
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Re: View with map join fails - Hive - [mail # user]
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...Looks like there is a bug with mapjoin + view. Please check hive jira to see if there an issue open against this else file a new jira. From my understanding, When you enable map ...
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Author: bejoy_ks@...,
2013-01-08, 18:41
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Re: Mapping HBase table in Hive - Hive - [mail # user]
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...Hi Ibrahim The hive hbase integration totally depends on the hbase table schema and not the schema of the source table in mysql. You need to provide the column family qualifier m...
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Author: bejoy_ks@...,
2013-01-08, 18:35
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Re: Map Reduce Local Task - Hive - [mail # user]
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...Hi Santhosh As long as the smaller table size is in the range of a few MBs. It is a good candidate for map join. If the smaller table size is still more then you can take a look ...
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Author: bejoy_ks@...,
2013-01-08, 18:24
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Re: External table with partitions - Hive - [mail # user]
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...Sorry, I din understand your query on first look through. Like Jagat said, you may need to go with a temp table for this. Do a hadoop fs -cp ../../a.* Create a external ta...
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Author: bejoy_ks@...,
2013-01-06, 14:47
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Re: External table with partitions - Hive - [mail # user]
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...Hi Oded If you have created the directories manually that would come visible to the hive table only if the partitions/ sub dirs are added to the meta data using 'ALTER TABLE ... ADD PA...
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Author: bejoy_ks@...,
2013-01-06, 14:39
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Re: Map side join - Hive - [mail # user]
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...Hi Souvik To have the new hdfs block size in effect on the already existing files, you need to re copy them into hdfs. To play with the number of mappers you can set lesser value...
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Author: bejoy_ks@...,
2012-12-13, 18:06
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Re: Map side join - Hive - [mail # user]
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...Hi Souvik Is your input files compressed using some non splittable compression codec? Do you have enough free slots while this job is running? Make sure that the job is not...
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Author: bejoy_ks@...,
2012-12-13, 17:12
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