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[HIVE-784] Support uncorrelated subqueries in the WHERE clause - Hive - [issue]
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...Hive currently only support views in the FROM-clause, some Facebook use cases suggest that Hive should support subqueries such as those connected by IN/EXISTS in the WHERE-clause....
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http://issues.apache.org/jira/browse/HIVE-784
Author: Ning Zhang,
2013-06-10, 22:07
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[HIVE-1362] Optimizer statistics on columns in tables and partitions - Hive - [issue]
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http://issues.apache.org/jira/browse/HIVE-1362
Author: Ning Zhang,
2013-05-15, 06:58
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[HIVE-747] void type (null column) cannot be UNIONed with other type - Hive - [issue]
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...hive> select * from (select NULL from zshao_tt union all select 1 from zshao_tt)x;select * from (select NULL from zshao_tt union all select 1 from zshao_tt)x;FAILED: Error in semantic ana...
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http://issues.apache.org/jira/browse/HIVE-747
Author: Ning Zhang,
2013-05-14, 09:07
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[HIVE-1309] let user specify "bad file" rather than HIVE_DEFAULT_PARTITION in dynamic partition insert - Hive - [issue]
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...Currently if the dynamic partition column value is "bad" – null, empty string, etc., the row will be put into the _HIVE_DEFAULT_PARTITION_ where the bad column value will be lost (repl...
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http://issues.apache.org/jira/browse/HIVE-1309
Author: Ning Zhang,
2013-04-20, 23:16
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[HIVE-1558] introducing the "dual" table - Hive - [issue]
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...The "dual" table in MySQL and Oracle is very convenient in testing UDFs or constructing rows without reading any other tables. If dual is the only data source we could leverage the local mod...
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http://issues.apache.org/jira/browse/HIVE-1558
Author: Ning Zhang,
2013-03-27, 00:25
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[HIVE-2084] Upgrade datanucleus from 2.0.3 to 3.0.1 - Hive - [issue]
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...It seems the datanucleus 2.2.3 does a better join in caching. The time it takes to get the same set of partition objects takes about 1/4 of the time it took for the first time. While with 2....
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http://issues.apache.org/jira/browse/HIVE-2084
Author: Ning Zhang,
2013-03-18, 01:51
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[HIVE-948] more query plan optimization rules - Hive - [issue]
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...Many query plans are not optimal in that they contain redundant operators. Some examples are unnecessary select operators (select followed by select, select output being the same as input et...
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http://issues.apache.org/jira/browse/HIVE-948
Author: Ning Zhang,
2013-02-26, 05:24
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[HIVE-2017] Driver.execute() should maintaining SessionState in case of runtime errors - Hive - [issue]
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...Here's a snippet from Driver.execute(): // TODO: This error messaging is not very informative. Fix that. ...
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http://issues.apache.org/jira/browse/HIVE-2017
Author: Ning Zhang,
2013-02-25, 21:39
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[HIVE-1361] table/partition level statistics - Hive - [issue]
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...At the first step, we gather table-level stats for non-partitioned table and partition-level stats for partitioned table. Future work could extend the table level stats to partitioned table ...
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http://issues.apache.org/jira/browse/HIVE-1361
Author: Ning Zhang,
2013-01-19, 02:14
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[HIVE-3586] External partition - Hive - [issue]
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...External tables are extremely useful when two or more tables share the same data but would like to avoid the data copy and ownership conflicts. We found it useful to extend the "external" co...
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http://issues.apache.org/jira/browse/HIVE-3586
Author: Ning Zhang,
2012-10-16, 19:07
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