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[HIVE-7397] Set the default threshold for fetch task conversion to 1Gb - Hive - [issue]
...Currently, modifying the value of hive.fetch.task.conversion to "more" results in a dangerous setting where small scale queries function, but large scale queries crash.This occurs because th...
http://issues.apache.org/jira/browse/HIVE-7397    Author: Gopal V, 2014-07-23, 20:11
[HIVE-7428] OrcSplit fails to account for columnar projections in its size estimates - Hive - [issue]
...Currently, ORC generates splits based on stripe offset + stripe length.This means that the splits for all columnar projections are exactly the same size, despite reading the footer which giv...
http://issues.apache.org/jira/browse/HIVE-7428    Author: Gopal V, 2014-07-16, 18:44
[HIVE-7402] add `approx_distinct` & composable nDV UDAFs - Hive - [issue]
...Build composable approximate distinct UDAFs into hive.This is useful for approximate queries, particularly for collapsing partial nDV values whenever a partition is added.hive> select app...
http://issues.apache.org/jira/browse/HIVE-7402    Author: Gopal V, 2014-07-14, 22:34
[HIVE-7394] ORC writer logging fails when the padding is < 0.01 - Hive - [issue]
...Currently ORC inserts logs the padding fraction.The log line throws a format exception when padding is too small....
http://issues.apache.org/jira/browse/HIVE-7394    Author: Gopal V, 2014-07-14, 04:38
[HIVE-7144] GC pressure during ORC StringDictionary writes - Hive - [issue]
...When ORC string dictionary writes data out, it suffers from bad GC performance due to a few allocations in-loop.The conversions are as followsStringTreeWriter::getStringValue() causes 2 conv...
http://issues.apache.org/jira/browse/HIVE-7144    Author: Gopal V, 2014-07-08, 21:14
[HIVE-7359] Stats based compute query replies fail to do simple column transforms - Hive - [issue]
...The following two queries return the same answer (the second one is incorrect)hive> set hive.compute.query.using.stats=true;hive> select count(1) from trips;OK187271461Time taken: 0.17...
http://issues.apache.org/jira/browse/HIVE-7359    Author: Gopal V, 2014-07-07, 23:42
[HIVE-7302] Allow Auto-reducer parallelism to be turned off by a logical optimizer - Hive - [issue]
...Auto reducer parallelism cannot be used for cases where a custom routing VertexManager is used.Allow a tri-state for ReduceSinkDesc::isAutoParallel to allow "allow, disable, unset" mechanics...
http://issues.apache.org/jira/browse/HIVE-7302    Author: Gopal V, 2014-06-28, 22:54
[HIVE-7313] Allow session-level temp-tables to be marked as in-memory tables - Hive - [issue]
...When the hadoop-2.3C shims are in action, APIs which can pin small tables into memory are available.Any session with an in-memory table can create HDFS in-memory pools with default caching s...
http://issues.apache.org/jira/browse/HIVE-7313    Author: Gopal V, 2014-06-28, 03:39
[HIVE-7232] VectorReduceSink is emitting incorrect JOIN keys - Hive - [issue]
...After HIVE-7121, tpc-h query5 has resulted in incorrect results.Thanks to Navis, it has been tracked down to the auto-parallel settings which were initialized for ReduceSinkOperator, but not...
http://issues.apache.org/jira/browse/HIVE-7232    Author: Gopal V, 2014-06-27, 03:17
[HIVE-7293] Hive-trunk does not build against JDK8 with generic class checks - Hive - [issue]
...The current build and tests on my laptop are failing due to generic argument mismatch errors.hive-trunk/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFOPGreaterThan.java:[46,82]...
http://issues.apache.org/jira/browse/HIVE-7293    Author: Gopal V, 2014-06-25, 21:27
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