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

Interface Summary

Interface	Description
BucketingSortingCtx.BucketSortCol	BucketSortCol.
PhysicalPlanResolver	Physical plan optimization interface.

Class Summary

Class	Description
AbstractJoinTaskDispatcher	Common iteration methods for converting joins and sort-merge joins.
BucketingSortingCtx	This class contains the bucketing sorting context that is passed while walking the operator tree in inferring bucket/sort columns.
BucketingSortingCtx.BucketCol	BucketCol.
BucketingSortingCtx.SortCol	SortCol.
BucketingSortingInferenceOptimizer	BucketingSortingInferenceOptimizer.
BucketingSortingOpProcFactory	Operator factory for the rule processors for inferring bucketing/sorting columns.
BucketingSortingOpProcFactory.DefaultInferrer
BucketingSortingOpProcFactory.FileSinkInferrer	Processor for FileSink operator.
BucketingSortingOpProcFactory.ForwardingInferrer	Filter processor
BucketingSortingOpProcFactory.GroupByInferrer	Processor for GroupBy operator.
BucketingSortingOpProcFactory.JoinInferrer	Processor for Join Operator.
BucketingSortingOpProcFactory.MultiGroupByInferrer	Processor for GroupByOperator, the special case where it follows a ForwardOperator There is a multi group by optimization which puts multiple group by operators in a reducer when they share the same keys and are part of a multi insert query.
BucketingSortingOpProcFactory.SelectInferrer	Processor for Select operator.
CommonJoinResolver
CommonJoinTaskDispatcher	Iterator each tasks.
CrossProductCheck
CrossProductCheck.ExtractReduceSinkInfo
CrossProductCheck.MapJoinCheck
GenMRSkewJoinProcessor	GenMRSkewJoinProcessor.
GenSparkSkewJoinProcessor	Copied from GenMRSkewJoinProcessor.
IndexWhereResolver
LocalMapJoinProcFactory	Node processor factory for map join resolver.
LocalMapJoinProcFactory.LocalMapJoinProcessor	LocalMapJoinProcessor.
LocalMapJoinProcFactory.MapJoinFollowedByGroupByProcessor	MapJoinFollowByProcessor.
MapJoinResolver	An implementation of PhysicalPlanResolver.
MapJoinResolver.LocalMapJoinProcCtx	A container of current task and parse context.
MetadataOnlyOptimizer	MetadataOnlyOptimizer determines to which TableScanOperators "metadata only" optimization can be applied.
NullScanOptimizer	This optimizer attempts following two optimizations: 1.
NullScanTaskDispatcher	Iterate over all tasks one by one and removes all input paths from task if conditions as defined in rules match.
PhysicalContext	physical context used by physical resolvers.
PhysicalOptimizer	A hierarchy physical optimizer, which contains a list of PhysicalPlanResolver.
SamplingOptimizer	Mark final MapredWork for ORDER BY to use sampling and set number of reduce task as -1
SkewJoinProcFactory	Node processor factory for skew join resolver.
SkewJoinProcFactory.SkewJoinDefaultProcessor	SkewJoinDefaultProcessor.
SkewJoinProcFactory.SkewJoinJoinProcessor	SkewJoinJoinProcessor.
SkewJoinResolver	An implementation of PhysicalPlanResolver.
SkewJoinResolver.SkewJoinProcCtx	A container of current task and parse context.
SortMergeJoinResolver
SortMergeJoinTaskDispatcher	Iterator over each task.
SparkCrossProductCheck	Check each MapJoin and ShuffleJoin Operator to see if they are performing a cross product.
SparkMapJoinResolver
StageIDsRearranger	Simple renumbering of stage ids
StageIDsRearranger.TaskTraverse
Vectorizer