Package org.apache.hadoop.hive.ql.optimizer.correlation

Class Summary
CorrelationOptimizer Implementation of Correlation Optimizer.
CorrelationUtilities Utilities for both CorrelationOptimizer and ReduceSinkDeDuplication.
IntraQueryCorrelation IntraQueryCorrelation records a sub-tree of the query plan tree which can be evaluated in a single MR job.
QueryPlanTreeTransformation QueryPlanTreeTransformation contains static methods used to transform the query plan tree (operator tree) based on the correlation we have detected by Correlation Optimizer.
ReduceSinkDeDuplication If two reducer sink operators share the same partition/sort columns and order, they can be merged.

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