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[TEZ-4073] Configuration: Reduce Vertex and DAG Payload Size - Tez - [issue]
...As the total number of vertices go up, the Tez protobuf transport starts to show up as a potential scalability problem for the task submission and the AMpublic TezTaskRunner2(Configuration t...
http://issues.apache.org/jira/browse/TEZ-4073    Author: Gopal V , 2019-06-01, 06:13
[HIVE-18920] CBO: Initialize the Janino providers ahead of 1st query - Hive - [issue]
...Hive Calcite metadata providers are compiled when the 1st query comes in.If a second query arrives before the 1st one has built a metadata provider, it will also try to do the same thing, be...
http://issues.apache.org/jira/browse/HIVE-18920    Author: Gopal V , 2019-05-30, 23:23
[HIVE-21768] JDBC: Strip the default union prefix for un-enclosed UNION queries - Hive - [issue]
...beeline> select 1  union all select 2;+----------+| _u1._c0  |+----------+| 2        || 1        |+----------+The _u1 is superfluous and ...
http://issues.apache.org/jira/browse/HIVE-21768    Author: Gopal V , 2019-05-28, 22:08
[HIVE-21646] Tez: Prevent TezTasks from escaping thread logging context - Hive - [issue]
...If hive.exec.parallel is set to true to parallelize MoveTasks or StatsTasks, the Tez task does not benefit from a new thread and will lose all the thread context of the current query.Multipl...
http://issues.apache.org/jira/browse/HIVE-21646    Author: Gopal V , 2019-05-24, 06:23
[HIVE-21781] Optimizer: Constant folding without CBO skips the aggregates - Hive - [issue]
...create temporary table foo (x int) ;insert into foo values(1),(2),(3),(4),(5);set hive.explain.user=false;explain vectorization detail select count(case when (x=1 or false) then 1 else 0 end...
http://issues.apache.org/jira/browse/HIVE-21781    Author: Gopal V , 2019-05-23, 04:58
[HIVE-21779] ACID: Delete deltas should not project the row struct - Hive - [issue]
...        if (useDecimal64ColumnVector) {          this.batch = deleteDeltaReader.getSchema().createRowBatchV2();        } else...
http://issues.apache.org/jira/browse/HIVE-21779    Author: Gopal V , 2019-05-22, 16:51
[ORC-500] PPD: StripeStatistics::getColumnStatistics() does not column prune - Orc - [issue]
...StripeStatistics::getColumnStatistics() will deserialize all column statistics, even if the ORC predicate push-down and the eventual SARG applies to a subset.This is affecting DATE push-down...
http://issues.apache.org/jira/browse/ORC-500    Author: Gopal V , 2019-05-16, 01:17
[HIVE-10915] ORC fails to read table with a 38Gb ORC file - Hive - [issue]
...hive>  set mapreduce.input.fileinputformat.split.maxsize=1000000000000;hive> set  mapreduce.input.fileinputformat.split.maxsize=1000000000000;hive> alter table lineitem co...
http://issues.apache.org/jira/browse/HIVE-10915    Author: Gopal V , 2019-05-10, 16:07
[HIVE-21687] LLAP: LlapBaseInputFormat.getSplits(..., 0) should use LIMIT 0 query - Hive - [issue]
...The 0 split query is useful in ensuring that the user has access to the tables and getting the result schema.There's a fast-path for Tableau for "LIMIT 0" queries which can be used for this ...
http://issues.apache.org/jira/browse/HIVE-21687    Author: Gopal V , 2019-05-03, 06:03
[HIVE-21400] Vectorization: LazyBinarySerializeWrite allocates Field() within the loop - Hive - [issue]
...GC thrash from an unexpected source in ReduceSinkOperator.org.apache.hadoop.hive.serde2.lazybinary.fast.LazyBinarySerializeWrite.resetWithoutOutput(LazyBinarySerializeWrite.java:136)  &...
http://issues.apache.org/jira/browse/HIVE-21400    Author: Gopal V , 2019-04-24, 22:37