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[HIVE-757] Don't send constants from mapper to reducer for Group By queries - Hive - [issue]
...If an aggregation function takes a constant expression, we are still sending it from mapper to reducer, but it's not necessary since we can compute the constants on the reducer side.This wil...
http://issues.apache.org/jira/browse/HIVE-757    Author: Zheng Shao, 2012-09-28, 01:47
[HIVE-365] Create Table to support multiple levels of delimiters - Hive - [issue]
...From HIVE-337, the SerDe layer now supports multiple-levels of delimiters, for the purpose of supporting nested map/array/struct.Array(the same as List) and struct consume a single level of ...
http://issues.apache.org/jira/browse/HIVE-365    Author: Zheng Shao, 2012-07-10, 16:50
[HIVE-917] Bucketed Map Join - Hive - [issue]
...Hive already have support for map-join. Map-join treats the big table as job input, and in each mapper, it loads all data from a small table.In case the big table is already bucketed on the ...
http://issues.apache.org/jira/browse/HIVE-917    Author: Zheng Shao, 2012-06-21, 21:52
[HIVE-1106] Support "Alter table t add if not exists partition ..." - Hive - [issue]
...It will be useful to add such a command so that users don't see an error when adding an existing partition....
http://issues.apache.org/jira/browse/HIVE-1106    Author: Zheng Shao, 2012-04-09, 20:44
[HIVE-548] Code cleanup: refactor the 4 methods like SemanticAnalyzer.genGroupByPlanGroupByOperator - Hive - [issue]
...We have 4 methods to generate the GroupByOperators in the SemanticAnalyzer:SemanticAnalyzer.genGroupByPlanGroupByOperator  SemanticAnalyzer.genGroupByPlanMapGroupByOperator &n...
http://issues.apache.org/jira/browse/HIVE-548    Author: Zheng Shao, 2012-02-24, 21:09
[HIVE-313] add UDF date_add, date_sub, datediff - Hive - [issue]
...See http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_date-addSee http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_date-subSee http://d...
http://issues.apache.org/jira/browse/HIVE-313    Author: Zheng Shao, 2011-12-17, 00:09
[HIVE-104] Tables with at least 1 non-string columns should use DynamicSerDe instead of MetadataTypedColumnsetSerDe - Hive - [issue]
...For example, create table TableA (cola int, colb string).The MetadataTypedColumnsetSerDe is not capable of producing int values....
http://issues.apache.org/jira/browse/HIVE-104    Author: Zheng Shao, 2011-12-17, 00:09
[HIVE-113] support of distribute by and sort by - Hive - [issue]
...Currently Hive supports "cluster by" which puts the columns into map-reduce key.  Hadoop map-reduce actually allows different partitioning (we call distribute) keys and sorting keys.In ...
http://issues.apache.org/jira/browse/HIVE-113    Author: Zheng Shao, 2011-12-17, 00:09
[HIVE-336] TBinaryProtocol blow up the data size between map-reduce boundary - Hive - [issue]
...TBinaryProtocol is very space-inefficient. We've seen the data blown up several times between the map-reduce boundary because of it.We should change it to simple delimited format (backed by ...
http://issues.apache.org/jira/browse/HIVE-336    Author: Zheng Shao, 2011-12-17, 00:09
[HIVE-190] Tests might fail because we do not drop all tables in input2.q and input3.q - Hive - [issue]
...Both the tests do "show tables" so we need to make sure all tables created should be removed before the test is run....
http://issues.apache.org/jira/browse/HIVE-190    Author: Zheng Shao, 2011-12-17, 00:09
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