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[HIVE-2555] Make the hashmap in map-side group by pluggable
...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...
, 2013-01-14, 22:33
[HIVE-2846] Enhance bucketing and sorting support in hive
...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...
, 2013-01-14, 22:19
[HIVE-3426] union with same source should be optimized
, 2013-01-14, 22:09
[HIVE-3824] bug if different serdes are used for different partitions
...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...
, 2013-01-14, 22:05
[HIVE-3042] Thrift classes do not need to be passed to the mappers and reducers
, 2013-01-13, 23:36
[HIVE-3803] explain dependency should show the dependencies hierarchically in presence of views
...It should also include tables whose partitions are being accessed...
, 2013-01-13, 12:56
[HIVE-942] use bucketing for group by
...Group by on a bucketed column can be completely performed on the mapper if the split can be adjusted to span the key boundary....
, 2013-01-11, 23:27
[HIVE-3888] wrong mapside groupby if no partition is being selected
, 2013-01-11, 20:34
[HIVE-3882] config for enabling HIVE-2723
...Since it a backward incompatible change, it might be a good idea to make itconfigurable....
, 2013-01-11, 06:38
[HIVE-3821] RCFile does not work with lazyBinarySerDe
...create table tst(key string, value string) row format serde 'org.apache.hadoop.hive.serde2.lazybinary.LazyBinarySerDe' stored as rcfile; insert overwrite table tst select * from src;ge...
, 2012-12-20, 11:34
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