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[HIVE-1605] regression and improvements in handling NULLs in joins - Hive - [issue]
...There are regressions in sort-merge map join after HIVE-741. There are a lot of OOM exceptions in SMBMapJoinOperator. This caused by the HashMap maintained for each key to remember whether i...
http://issues.apache.org/jira/browse/HIVE-1605    Author: Ning Zhang, 2011-12-17, 00:00
[HIVE-1820] Make Hive database data center aware - Hive - [issue]
...In order to support multiple data centers (different DFS, MR clusters) for hive, it is desirable to extend Hive database to be data center aware. Currently Hive database is a logical concept...
http://issues.apache.org/jira/browse/HIVE-1820    Author: Ning Zhang, 2011-12-17, 00:00
[HIVE-1489] TestCliDriver -Doverwrite=true does not put the file in the correct directory - Hive - [issue]
...When adding a new file in clientpositive with -Doverwrite=true, the output file was in ql/ rather than ql/src/test/results/clientpositive....
http://issues.apache.org/jira/browse/HIVE-1489    Author: Ning Zhang, 2011-12-17, 00:00
[HIVE-1944] dynamic partition insert creating different directories for the same partition during merge - Hive - [issue]
...If dynamic partition insert generates multiple partitions and some partitions need to be merge (MR task) and some need not (move task), parallel execution could cause the move task finish fi...
http://issues.apache.org/jira/browse/HIVE-1944    Author: Ning Zhang, 2011-12-17, 00:00
[HIVE-1691] ANALYZE TABLE command should check columns in partition spec - Hive - [issue]
...ANALYZE TABEL PARTITION (col1, col2,...) should check whether col1, col2 etc are partition columns....
http://issues.apache.org/jira/browse/HIVE-1691    Author: Ning Zhang, 2011-12-16, 23:59
[HIVE-1852] Reduce unnecessary DFSClient.rename() calls - Hive - [issue]
...In Hive client side (MoveTask etc), DFSCleint.rename() is called for every file inside a directory. It is very expensive for a large directory in a busy DFS namenode. We should replace it wi...
http://issues.apache.org/jira/browse/HIVE-1852    Author: Ning Zhang, 2011-12-16, 23:59
[HIVE-1713] duplicated MapRedTask in Multi-table inserts mixed with FileSinkOperator and ReduceSinkOperator - Hive - [issue]
...A multi-table insert with FileSinkOperator and ReduceSinkOperator have the same MapRedTask added to the rootTask twice. This results in failed execution or wrong results....
http://issues.apache.org/jira/browse/HIVE-1713    Author: Ning Zhang, 2011-12-16, 23:59
[HIVE-1639] ExecDriver.addInputPaths() error if partition name contains a comma - Hive - [issue]
...The ExecDriver.addInputPaths() calls FileInputFormat.addPaths(), which takes a comma-separated string representing a set of paths. If the path name of a input file contains a comma, this cod...
http://issues.apache.org/jira/browse/HIVE-1639    Author: Ning Zhang, 2011-12-16, 23:59
[HIVE-1674] count(*) returns wrong result when a mapper returns empty results - Hive - [issue]
...select count from src where false; will return # of mappers rather than 0....
http://issues.apache.org/jira/browse/HIVE-1674    Author: Ning Zhang, 2011-12-16, 23:59
[HIVE-1961] Make Stats gathering more flexible with timeout and atomicity - Hive - [issue]
...The JDBC-type stats publisher and and aggregator use a hard-coded timeout value. We should make it configurable. Also we should introduce a hive variable to allow atomic stats gathering (met...
http://issues.apache.org/jira/browse/HIVE-1961    Author: Ning Zhang, 2011-12-16, 23:59
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