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(Updated Oct. 19, 2012, 3:37 p.m.) Review request for hive. Changes ------- diff7 is not the correct one. diff8 is the update Description ------- This optimizer exploits intra-query correlations and merges multiple correlated MapReduce jobs into one jobs. Open a new request since I have been working on hive-git. This addresses bug HIVE-2206. https://issues.apache.org/jira/browse/HIVE-2206 Diffs (updated) ----- common/src/java/org/apache/hadoop/hive/conf/HiveConf.java f86d6a7 conf/hive-default.xml.template 4a59fb6 ql/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/ql/plan/api/OperatorType.java 8c9bd26 ql/src/java/org/apache/hadoop/hive/ql/exec/BaseReduceSinkOperator.java PRE-CREATION ql/src/java/org/apache/hadoop/hive/ql/exec/CorrelationCompositeOperator.java PRE-CREATION ql/src/java/org/apache/hadoop/hive/ql/exec/CorrelationLocalSimulativeReduceSinkOperator.java PRE-CREATION ql/src/java/org/apache/hadoop/hive/ql/exec/CorrelationReducerDispatchOperator.java PRE-CREATION ql/src/java/org/apache/hadoop/hive/ql/exec/ExecReducer.java 18a9bd2 ql/src/java/org/apache/hadoop/hive/ql/exec/GroupByOperator.java 652d81c ql/src/java/org/apache/hadoop/hive/ql/exec/Operator.java 587fe33 ql/src/java/org/apache/hadoop/hive/ql/exec/OperatorFactory.java 0c22141 ql/src/java/org/apache/hadoop/hive/ql/exec/ReduceSinkOperator.java 919a140 ql/src/java/org/apache/hadoop/hive/ql/exec/TableScanOperator.java 1469325 ql/src/java/org/apache/hadoop/hive/ql/optimizer/CorrelationOptimizer.java PRE-CREATION ql/src/java/org/apache/hadoop/hive/ql/optimizer/CorrelationOptimizerUtils.java PRE-CREATION ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMapRedUtils.java 01b0728 ql/src/java/org/apache/hadoop/hive/ql/optimizer/Optimizer.java 40cc7ed ql/src/java/org/apache/hadoop/hive/ql/parse/ParseContext.java 8bacd3d ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java bdae9d5 ql/src/java/org/apache/hadoop/hive/ql/plan/BaseReduceSinkDesc.java PRE-CREATION ql/src/java/org/apache/hadoop/hive/ql/plan/CorrelationCompositeDesc.java PRE-CREATION ql/src/java/org/apache/hadoop/hive/ql/plan/CorrelationLocalSimulativeReduceSinkDesc.java PRE-CREATION ql/src/java/org/apache/hadoop/hive/ql/plan/CorrelationReducerDispatchDesc.java PRE-CREATION ql/src/java/org/apache/hadoop/hive/ql/plan/MapredWork.java 5a9f064 ql/src/java/org/apache/hadoop/hive/ql/plan/ReduceSinkDesc.java 16eb125 ql/src/java/org/apache/hadoop/hive/ql/plan/TableScanDesc.java 9a95efd ql/src/test/org/apache/hadoop/hive/ql/exec/TestExecDriver.java 142f040 ql/src/test/queries/clientpositive/correlationoptimizer1.q PRE-CREATION ql/src/test/queries/clientpositive/correlationoptimizer2.q PRE-CREATION ql/src/test/queries/clientpositive/correlationoptimizer3.q PRE-CREATION ql/src/test/queries/clientpositive/correlationoptimizer4.q PRE-CREATION ql/src/test/queries/clientpositive/correlationoptimizer5.q PRE-CREATION ql/src/test/results/clientpositive/correlationoptimizer1.q.out PRE-CREATION ql/src/test/results/clientpositive/correlationoptimizer2.q.out PRE-CREATION ql/src/test/results/clientpositive/correlationoptimizer3.q.out PRE-CREATION ql/src/test/results/clientpositive/correlationoptimizer4.q.out PRE-CREATION ql/src/test/results/clientpositive/correlationoptimizer5.q.out PRE-CREATION ql/src/test/results/compiler/plan/groupby1.q.xml 4382252 ql/src/test/results/compiler/plan/groupby2.q.xml eef669c ql/src/test/results/compiler/plan/groupby3.q.xml 9743480 ql/src/test/results/compiler/plan/groupby5.q.xml 8e07860 Diff: https://reviews.apache.org/r/7126/diff/ Testing ------- All tests pass. Thanks, Yin Huai