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[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...    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...    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...    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...    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...    Author: Gopal V , 2019-05-10, 16:07
[HIVE-21344] CBO: Reduce compilation time in presence of materialized views - Hive - [issue]
...For every query, getAllValidMaterializedViews still requires a call to metastore to verify that the materializations exist, whether they are outdated or not, etc. Since this is only useful f...    Author: Gopal V , 2019-05-06, 17:05
[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 ...    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  &...    Author: Gopal V , 2019-04-24, 22:37
[HIVE-21531] Vectorization: all NULL hashcodes are not computed using Murmur3 - Hive - [issue]
...The comments in Vectorized hash computation call out the MurmurHash implementation (the one using 0x5bd1e995), while the non-vectorized codepath calls out the Murmur3 one (using 0xcc9e2d51)....    Author: Gopal V , 2019-04-24, 22:35
[TEZ-4044] Zookeeper: exclude jline from Zookeeper client from tez dist - Tez - [issue]
...[INFO] |  +- org.apache.zookeeper:zookeeper:jar:3.4.9:compile[INFO] |  |  \- jline:jline:jar:0.9.94:compileBreaks CLI clients further down the dependency tree....    Author: Gopal V , 2019-04-19, 19:21