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[HIVE-3776] support PIVOT in hive - Hive - [issue]
...It is a fairly well understood feature in databases....
http://issues.apache.org/jira/browse/HIVE-3776    Author: Namit Jain, 2015-08-14, 06:06
[HIVE-4095] Add exchange partition in Hive - Hive - [issue]
http://issues.apache.org/jira/browse/HIVE-4095    Author: Namit Jain, 2015-08-14, 02:04
[HIVE-1721] use bloom filters to improve the performance of joins - Hive - [issue]
...In case of map-joins, it is likely that the big table will not find many matching rows from the small table.Currently, we perform a hash-map lookup for every row in the big table, which can ...
http://issues.apache.org/jira/browse/HIVE-1721    Author: Namit Jain, 2015-07-18, 07:46
[HIVE-686] add UDF substring_index - Hive - [issue]
...SUBSTRING_INDEX(str,delim,count)Returns the substring from string str before count occurrences of the delimiter delim. If count is positive, everything to the left of the final delimiter (co...
http://issues.apache.org/jira/browse/HIVE-686    Author: Namit Jain, 2015-06-09, 09:29
[HIVE-1033] change default value of hive.exec.parallel to true - Hive - [issue]
...There is no harm in changing it to true. Inside facebook, we have been testing it and it seems to be stable....
http://issues.apache.org/jira/browse/HIVE-1033    Author: Namit Jain, 2015-05-20, 12:37
[HIVE-3784] de-emphasize mapjoin hint - Hive - [issue]
...hive.auto.convert.join has been around for a long time, and is pretty stable.When mapjoin hint was created, the above parameter did not exist.The only reason for the user to specify a mapjoi...
http://issues.apache.org/jira/browse/HIVE-3784    Author: Namit Jain, 2015-05-13, 08:45
[HIVE-3296] comments before a set statement in a test do not work - Hive - [issue]
...The following test fails:::– test commentset hive.test="foo";create table tst(key string);The output is::FAILED: ParseException line 2:0 cannot recognize input near 'set' 'hive' '.'How...
http://issues.apache.org/jira/browse/HIVE-3296    Author: Namit Jain, 2015-04-13, 10:05
[HIVE-964] handle skewed keys for a join in a separate job - Hive - [issue]
...The skewed keys can be written to a temporary table or file, and a followup conditional task can be used to perform the join on those keys.As a first step, JDBM can be used for those keys...
http://issues.apache.org/jira/browse/HIVE-964    Author: Namit Jain, 2015-04-06, 04:05
[HIVE-3728] make optimizing multi-group by configurable - Hive - [issue]
...This was done as part of https://issues.apache.org/jira/browse/HIVE-609.This should be configurable....
http://issues.apache.org/jira/browse/HIVE-3728    Author: Namit Jain, 2015-02-06, 08:42
[HIVE-3552] HIVE-3552 performant manner for performing cubes/rollups/grouping sets for a high number of grouping set keys - Hive - [issue]
...This is a follow up for HIVE-3433.Had a offline discussion with Sambavi - she pointed out a scenario where theimplementation in HIVE-3433 will not scale. Assume that the user is performinga ...
http://issues.apache.org/jira/browse/HIVE-3552    Author: Namit Jain, 2015-01-31, 19:58
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elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB