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[HIVE-2068] Speed up query "select xx,xx from xxx LIMIT xxx" if no filtering or aggregation - Hive - [issue]
...Currently, "select xx,xx from xxx where ...(only partition conditions) LIMIT xxx" will start a MapReduce job with input to be the whole table or partition. The latency can be huge if the tab...
http://issues.apache.org/jira/browse/HIVE-2068    Author: Siying Dong, 2011-12-16, 23:56
[HIVE-2113] In shell mode, local mode continues if a local-mode task throws exception in pre-hooks - Hive - [issue]
...In Driver.execute(), if exception is thrown in prehooks, the execution jumps to the exception handling logic and skips the step of ctx.restoreOriginalTracker(). As a result, the next query w...
http://issues.apache.org/jira/browse/HIVE-2113    Author: Siying Dong, 2011-12-16, 23:56
[HIVE-2236] Cli: Print Hadoop's CPU milliseconds - Hive - [issue]
...CPU Milliseonds information is available from Hadoop's framework. Printing it out to Hive CLI when executing a job will help users to know more about their jobs....
http://issues.apache.org/jira/browse/HIVE-2236    Author: Siying Dong, 2011-12-16, 23:56
[HIVE-2385] Local Mode can be more aggressive if LIMIT optimization is on - Hive - [issue]
...Local mode now depends on total input data, but for LIMIT queries with no filtering, the data actually scanned can be much less and it's relatively predictable. We can place local mode more ...
http://issues.apache.org/jira/browse/HIVE-2385    Author: Siying Dong, 2011-12-16, 23:56
[HIVE-2052] PostHook and PreHook API to add flag to indicate it is pre or post hook plus cache for content summary - Hive - [issue]
...This will allow hooks to share some information better and reduce their latency...
http://issues.apache.org/jira/browse/HIVE-2052    Author: Siying Dong, 2011-12-16, 23:56
[HIVE-2024] In Driver.execute(), mapred.job.tracker is not restored if one of the task fails. - Hive - [issue]
...If automatically one job is determined to run in local mode, and the task fails with error code not 0, mapred.job.tracker will remain to be local and might cause further problems....
http://issues.apache.org/jira/browse/HIVE-2024    Author: Siying Dong, 2011-12-16, 23:56
[HIVE-2090] Add "DROP DATABASE ... CASCADE/RESTRICT" - Hive - [issue]
...A "DROP DATABASE ... FORCE" will be useful, when we use a database for isolation when doing some tests. Being able to force cleaning up the database will make test cleaning up easier....
http://issues.apache.org/jira/browse/HIVE-2090    Author: Siying Dong, 2011-12-16, 23:56
[HIVE-2282] Local mode needs to work well with block sampling - Hive - [issue]
...Currently, if block sampling is enabled and large set of data are sampled to a small set, local mode needs to be kicked in....
http://issues.apache.org/jira/browse/HIVE-2282    Author: Siying Dong, 2011-12-16, 23:56
[HIVE-2159] TableSample(percent ) uses one intermediate size to be int, which overflows for large sampled size, making the sampling never triggered. - Hive - [issue]
http://issues.apache.org/jira/browse/HIVE-2159    Author: Siying Dong, 2011-12-16, 23:56
[HIVE-2211] Fix a bug caused by HIVE-243 - Hive - [issue]
...Quick fix a bug caused by HIVE-243HIVE-234 removed the codes to wait for the threads to finish and use ThreadPoolExector.shutdown() to wait for the results. The usage of ThreadPoolExecutor.s...
http://issues.apache.org/jira/browse/HIVE-2211    Author: Siying Dong, 2011-12-16, 23:56
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