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[HIVE-1033] change default value of hive.exec.parallel to true
...There is no harm in changing it to true. Inside facebook, we have been testing it and it seems to be stable....
, 2015-05-20, 12:37
[HIVE-3784] de-emphasize mapjoin hint
...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...
, 2015-05-13, 08:45
[HIVE-3296] comments before a set statement in a test do not work
...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...
, 2015-04-13, 10:05
[HIVE-964] handle skewed keys for a join in a separate job
...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...
, 2015-04-06, 04:05
[HIVE-3728] make optimizing multi-group by configurable
...This was done as part of https://issues.apache.org/jira/browse/HIVE-609.This should be configurable....
, 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
...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 ...
, 2015-01-31, 19:58
[HIVE-1642] Convert join queries to map-join based on size of table/row
...Based on the number of rows and size of each table, Hive should automatically be able to convert a join into map-join....
, 2015-01-25, 09:37
[HIVE-1830] mappers in group followed by joins may die OOM
, 2015-01-25, 00:23
[HIVE-1344] error in select disinct
...from T a select distinct a.* where a.ds='2010-05-01';gets a error...
, 2015-01-19, 18:11
[HIVE-701] lots of reserved keywords in hive
...There is a problem if we want to use some reserved keywords:for example, creating a function of name left/right ? left/right is already a reserved keyword.The other way around should also be...
, 2015-01-16, 23:02
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