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[HIVE-8558] CBO: enable n-way joins after CBO join reordering - Hive - [issue]
...With CBO, we disable n-way joins.  But for consecutive tables we can safely collapse into n-way joins. For e.g this is safe to collapse:select p1.p_name, p2.p_name, p3.p_name from part ...
http://issues.apache.org/jira/browse/HIVE-8558    Author: Harish Butani, 2014-10-22, 21:32
[HIVE-6934] PartitionPruner doesn't handle top level constant expression correctly - Hive - [issue]
...You hit this error indirectly, because how we handle invalid constant comparisons. Consider:create table x(key int, value string) partitioned by (dt int, ts string);-- both these queries hit...
http://issues.apache.org/jira/browse/HIVE-6934    Author: Harish Butani, 2014-10-22, 18:58
[HIVE-6393] Support unqualified column references in Joining conditions - Hive - [issue]
...Support queries of the form:create table r1(a int);create table r2(b);select a, bfrom r1 join r2 on a = bThis becomes more useful in old style syntax:select a, bfrom r1, r2where a = b...
http://issues.apache.org/jira/browse/HIVE-6393    Author: Harish Butani, 2014-10-20, 08:21
[HIVE-7905] CBO: more cost model changes - Hive - [issue]
...1. For composite predicates smoothen the Selectivity calculation using exponential backoff. Thanks to [~ mmokhtar] for this formula.Can you change the algorithm to use exponential ba...
http://issues.apache.org/jira/browse/HIVE-7905    Author: Harish Butani, 2014-09-06, 00:46
[HIVE-7324] CBO: provide a mechanism to test CBO features based on table stats only (w/o table data) - Hive - [issue]
...Since lot of the CBO work is focused on planning, it will be nice to be able to run explain query to test CBO features. TPCDS has a rich enough schema and query set. So the patch loads a dum...
http://issues.apache.org/jira/browse/HIVE-7324    Author: Harish Butani, 2014-09-03, 09:00
[HIVE-7915] Expose High and Low value in plan.ColStatistics - Hive - [issue]
...These are being read from the Metastore but not populated in ColumnStatistics. One of the uses of this is HIVE-7905...
http://issues.apache.org/jira/browse/HIVE-7915    Author: Harish Butani, 2014-09-03, 00:24
[HIVE-7945] ColumnStatsUpdateTask is not setting stats for Date columns - Hive - [issue]
http://issues.apache.org/jira/browse/HIVE-7945    Author: Harish Butani, 2014-09-03, 00:14
[HIVE-7000] Several issues with javadoc generation - Hive - [issue]
...1.Ran 'mvn  javadoc:javadoc -Phadoop-2'.  Encountered several issues Generated classes are included in the javadoc generation fails in the top level hcatalog folder because its src...
http://issues.apache.org/jira/browse/HIVE-7000    Author: Harish Butani, 2014-09-02, 22:42
[HIVE-7940] Expose Machine Learning functions and Model application in Hive - Hive - [issue]
...Machine Learning functions HiveMall has demonstrated how to do machine learning in Hive. It has an extensive set of  functions; it shows a way through UDTFs and Amplify technique to do ...
http://issues.apache.org/jira/browse/HIVE-7940    Author: Harish Butani, 2014-09-02, 20:56
[HIVE-7720] CBO: rank translation to Optiq RelNode tree failing - Hive - [issue]
...Following query:explain select p_namefrom (select p_mfgr, p_name, p_size, rank() over(partition by p_mfgr order by p_size) as r from part) awhere r <= 2;fails with org.apache.hadoop.hive....
http://issues.apache.org/jira/browse/HIVE-7720    Author: Harish Butani, 2014-08-26, 22:55
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