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[HIVE-7142] Hive multi serialization encoding support - Hive - [issue]
...Currently Hive only support serialize data into UTF-8 charset bytes or deserialize from UTF-8 bytes, real world users may want to load different kinds of encoded data into hive directly. Thi...
http://issues.apache.org/jira/browse/HIVE-7142    Author: Chengxiang Li, 2016-02-02, 02:36
[HIVE-12515] Clean the SparkCounters related code after remove counter based stats collection[Spark Branch] - Hive - [issue]
...As SparkCounters is only used to collection stats, after HIVE-12411, we does not need it anymore....
http://issues.apache.org/jira/browse/HIVE-12515    Author: Chengxiang Li, 2016-01-28, 10:49
[HIVE-12888] TestSparkNegativeCliDriver does not run in Spark mode[Spark Branch] - Hive - [issue]
...During test, i found TestSparkNegativeCliDriver run in MR mode actually, it should be fixed....
http://issues.apache.org/jira/browse/HIVE-12888    Author: Chengxiang Li, 2016-01-27, 03:32
[HIVE-10180] Loop optimization for SIMD in ColumnArithmeticColumn.txt - Hive - [issue]
...JVM is quite strict on the code schema which may executed with SIMD instructions, take a loop in DoubleColAddDoubleColumn.java for example, for (int i = 0; i != n; i++) {  outputVector[...
http://issues.apache.org/jira/browse/HIVE-10180    Author: Chengxiang Li, 2016-01-11, 21:04
[HIVE-10238] Loop optimization for SIMD in IfExprColumnColumn.txt - Hive - [issue]
...The ?: operator as following could not be vectorized in loop, we may transfer it into mathematical expression.for(int j = 0; j != n; j++) {      int i = sel[j];    &...
http://issues.apache.org/jira/browse/HIVE-10238    Author: Chengxiang Li, 2015-09-24, 06:17
[HIVE-10179] Optimization for SIMD instructions in Hive - Hive - [issue]
...SIMD instuctions could be found in most of current CPUs, such as Intel's SSE2, SSE3, SSE4.x, AVX and AVX2, and it would help Hive to outperform if we can vectorize the mathematical manipulat...
http://issues.apache.org/jira/browse/HIVE-10179    Author: Chengxiang Li, 2015-08-11, 10:31
[HIVE-11204] Research on recent failed qtests[Spark Branch] - Hive - [issue]
...Found some strange failed qtests in HIVE-11053 Hive QA, as it's pretty sure that failed qtests are not related to HIVE-11053 patch, so just reproduce and research it here.Failed tests:org.ap...
http://issues.apache.org/jira/browse/HIVE-11204    Author: Chengxiang Li, 2015-08-05, 01:13
[HIVE-11082] Support multi edge between nodes in SparkPlan[Spark Branch] - Hive - [issue]
...For Dynamic RDD caching optimization, we found SparkPlan::connect throw exception while we try to combine 2 works with same child, support multi edge between nodes in SparkPlan would help to...
http://issues.apache.org/jira/browse/HIVE-11082    Author: Chengxiang Li, 2015-08-02, 04:39
[HIVE-11053] Add more tests for HIVE-10844[Spark Branch] - Hive - [issue]
...Add some test cases for self union, self-join, CWE, and repeated sub-queries to verify the job of combining quivalent works in HIVE-10844....
http://issues.apache.org/jira/browse/HIVE-11053    Author: Chengxiang Li, 2015-08-02, 04:34
[HIVE-10844] Combine equivalent Works for HoS[Spark Branch] - Hive - [issue]
...Some Hive queries(like TPCDS Q39) may share the same subquery, which translated into sperate, but equivalent Works in SparkWork, combining these equivalent Works into a single one would help...
http://issues.apache.org/jira/browse/HIVE-10844    Author: Chengxiang Li, 2015-08-02, 04:24
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elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB