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[HIVE-3922] repeated columns in join keys and join values - Hive - [issue]
...A simple query like:    > explain select a., b. from src a join src b on a.key = b.key;         OKABSTRACT SYNTAX TREE:  (TOK_QUERY (TOK_FROM ...
http://issues.apache.org/jira/browse/HIVE-3922    Author: Namit Jain, 2013-01-21, 05:04
[HIVE-3537] release locks at the end of move tasks - Hive - [issue]
...Look at HIVE-3106 for details.In order to make sure that concurrency is not an issue for multi-table inserts, the current option is to introduce a dependency task, which therebydelays the cr...
http://issues.apache.org/jira/browse/HIVE-3537    Author: Namit Jain, 2013-01-19, 23:19
[HIVE-3909] Wrong data due to HIVE-2820 - Hive - [issue]
...Consider the query:~/hive/hive1$ more ql/src/test/queries/clientpositive/join_reorder4.qCREATE TABLE T1(key1 STRING, val1 STRING) STORED AS TEXTFILE;CREATE TABLE T2(key2 STRING, val2 STRING)...
http://issues.apache.org/jira/browse/HIVE-3909    Author: Namit Jain, 2013-01-19, 02:28
[HIVE-3871] show number of mappers/reducers as part of explain extended - Hive - [issue]
...It would be useful to show the number of mappers/reducers as part of explain extended.For the MR jobs referencing intermediate data, the number can be approximate....
http://issues.apache.org/jira/browse/HIVE-3871    Author: Namit Jain, 2013-01-18, 05:05
[HIVE-965] optimize skewed joins - Hive - [issue]
...As a followup of https://issues.apache.org/jira/browse/HIVE-964, the joins for the skewed keys can be performed by using techniques similar to http://wiki.apache.org/pig/PigSkewedJoinSpec...
http://issues.apache.org/jira/browse/HIVE-965    Author: Namit Jain, 2013-01-14, 22:50
[HIVE-1283] map join does not stream the big tables - Hive - [issue]
...Currently, all the keys from the big table are read before the join is performed.It might be very slow if there is a hue skew, it might be a good optimization to stream the larger table...
http://issues.apache.org/jira/browse/HIVE-1283    Author: Namit Jain, 2013-01-14, 22:46
[HIVE-2555] Make the hashmap in map-side group by pluggable - Hive - [issue]
...There are a couple of implementations available (other than java.util.HashMap) - COLT, TROVE etc. to name a few.If the hashmap was pluggable, it would be easy to play around with different h...
http://issues.apache.org/jira/browse/HIVE-2555    Author: Namit Jain, 2013-01-14, 22:33
[HIVE-2846] Enhance bucketing and sorting support in hive - Hive - [issue]
...This task consists of a couple of sub-tasks.1. Removing the map-join hint completely. Moving all processing to runtime. Currently, bucketed map joins and sort merge joins are completelydrive...
http://issues.apache.org/jira/browse/HIVE-2846    Author: Namit Jain, 2013-01-14, 22:19
[HIVE-3426] union with same source should be optimized - Hive - [issue]
http://issues.apache.org/jira/browse/HIVE-3426    Author: Namit Jain, 2013-01-14, 22:09
[HIVE-3824] bug if different serdes are used for different partitions - Hive - [issue]
...Consider the following testcase:create table tst5 (key string, value string) partitioned by (ds string) stored as rcfile;insert overwrite table tst5 partition (ds='1') select * from src; &nb...
http://issues.apache.org/jira/browse/HIVE-3824    Author: Namit Jain, 2013-01-14, 22:05
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