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[HIVE-7625] CBO: stats for Partitioned tables are not read correctly.
...The wrong call is being made to read stats for Partitioned tables....
, 2014-08-06, 07:45
[HIVE-7478] CBO: PPD push conditions to Join Operators
...This was turned off in HivePushFilterPastJoin because non equality conditions were being pushed. Fix this so that equality predicates are pushed as join conditions....
, 2014-07-23, 03:08
[HIVE-7284] CBO: create Partition Pruning rules in Optiq
...NO PRECOMMIT TESTSCreate rules in Optiq that do the job of the PartitionPruner.For now we will reuse the logic that evaluates the Partition list from prunedExpr....
, 2014-07-18, 03:08
[HIVE-7344] Add streaming support in Windowing mode for FirstVal, LastVal
...Continuation of HIVE-7062, HIVE-7143...
, 2014-07-07, 23:25
[HIVE-7143] Add Streaming support in Windowing mode for more UDAFs (min/max, lead/lag, fval/lval)
...Provided implementations for Streaming for the above fns.Min/Max based on Alg by Daniel Lemire: http://www.archipel.uqam.ca/309/1/webmaximinalgo.pdf...
, 2014-07-07, 23:23
[HIVE-7304] Transitive Predicate Propagation doesn't happen properly after HIVE-7159
...The reason for the regression is that PredicateTransitivePropagate looks at the FilterOperator below the ReduceSink. SemanticAnalyzer::genNotNullFilterForJoinSourcePlan was stacking another ...
, 2014-07-01, 05:30
[HIVE-7063] Optimize for the Top N within a Group use case
...It is common to rank within a Group/Partition and then only return the Top N entries within each Group.With Streaming mode for Windowing, we should push the post filter on the rank into the ...
, 2014-07-01, 03:53
[HIVE-7283] CBO: plumb in HepPlanner and FieldTrimmer(ColumnPruner) into Optiq based planning
...1.HepPlanner initially used for: Predicate Pushdown Transitive Predicate inference Partition Pruning2. Use Optiq's FieldTrimmer for ColumnPrunerTo begin with the rules are copies of Optiq ba...
, 2014-06-28, 08:39
[HIVE-7159] For inner joins push a 'is not null predicate' to the join sources for every non nullSafe join condition
...A join B on A.x = B.ycan be transformed to(A where x is not null) join (B where y is not null) on A.x = B.yApart from avoiding shuffling null keyed rows it also avoids issues with reduce-sid...
, 2014-06-27, 02:19
[HIVE-6439] Introduce CBO step in Semantic Analyzer
...This patch introduces CBO step in SemanticAnalyzer. For now the CostBasedOptimizer is an empty shell. The contract between SemAly and CBO is: CBO step is controlled by the 'hive.enable...
, 2014-06-24, 22:41
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