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

Interface Summary

Transform

Optimizer interface.

Class Summary

BucketMapJoinOptimizer	this transformation does bucket map join optimization.
ColumnPruner	Implementation of one of the rule-based optimization steps.
ColumnPruner.ColumnPrunerWalker	Walks the op tree in post order fashion (skips selects with file sink or script op children).
ColumnPrunerProcCtx	This class implements the processor context for Column Pruner.
ColumnPrunerProcFactory	Factory for generating the different node processors used by ColumnPruner.
ColumnPrunerProcFactory.ColumnPrunerDefaultProc	The Default Node Processor for Column Pruning.
ColumnPrunerProcFactory.ColumnPrunerFilterProc	Node Processor for Column Pruning on Filter Operators.
ColumnPrunerProcFactory.ColumnPrunerGroupByProc	Node Processor for Column Pruning on Group By Operators.
ColumnPrunerProcFactory.ColumnPrunerJoinProc	The Node Processor for Column Pruning on Join Operators.
ColumnPrunerProcFactory.ColumnPrunerLateralViewForwardProc	The Node Processor for Column Pruning on Lateral View Forward Operators.
ColumnPrunerProcFactory.ColumnPrunerLateralViewJoinProc	The Node Processor for Column Pruning on Lateral View Join Operators.
ColumnPrunerProcFactory.ColumnPrunerMapJoinProc	The Node Processor for Column Pruning on Map Join Operators.
ColumnPrunerProcFactory.ColumnPrunerReduceSinkProc	The Node Processor for Column Pruning on Reduce Sink Operators.
ColumnPrunerProcFactory.ColumnPrunerSelectProc	The Node Processor for Column Pruning on Select Operators.
ColumnPrunerProcFactory.ColumnPrunerTableScanProc	The Node Processor for Column Pruning on Table Scan Operators.
GenMapRedUtils	General utility common functions for the Processor to convert operator into map-reduce tasks.
GenMRFileSink1	Processor for the rule - table scan followed by reduce sink.
GenMROperator	Processor for the rule - no specific rule fired.
GenMRProcContext	Processor Context for creating map reduce task.
GenMRProcContext.GenMapRedCtx	GenMapRedCtx is used to keep track of the current state.
GenMRProcContext.GenMRMapJoinCtx	GenMRMapJoinCtx.
GenMRProcContext.GenMRUnionCtx	GenMRUnionCtx.
GenMRRedSink1	Processor for the rule - table scan followed by reduce sink.
GenMRRedSink2	Processor for the rule - reduce sink followed by reduce sink.
GenMRRedSink3	Processor for the rule - union followed by reduce sink.
GenMRRedSink4	Processor for the rule - map join followed by reduce sink.
GenMRTableScan1	Processor for the rule - table scan.
GenMRUnion1	Processor for the rule - TableScan followed by Union.
GlobalLimitOptimizer	This optimizer is used to reduce the input size for the query for queries which are specifying a limit.
GroupByOptimizer	This transformation does group by optimization.
IndexUtils	Utility class for index support.
JoinReorder	Implementation of rule-based join table reordering optimization.
MapJoinFactory	Operator factory for MapJoin processing.
MapJoinFactory.MapJoin	MapJoin followed by Select.
MapJoinFactory.MapJoinMapJoin	MapJoin followed by MapJoin.
MapJoinFactory.ReduceSinkMapJoin	ReduceSink followed by MapJoin.
MapJoinFactory.TableScanMapJoin	TableScan followed by MapJoin.
MapJoinFactory.UnionMapJoin	Union followed by MapJoin.
MapJoinProcessor	Implementation of one of the rule-based map join optimization.
MapJoinProcessor.CurrentMapJoin	CurrentMapJoin.
MapJoinProcessor.Default	Default.
MapJoinProcessor.MapJoinDefault	MapJoinDefault.
MapJoinProcessor.MapJoinFS	MapJoinFS.
MapJoinProcessor.MapJoinWalkerCtx	MapJoinWalkerCtx.
Optimizer	Implementation of the optimizer.
PrunerExpressionOperatorFactory	Expression processor factory for pruning.
PrunerExpressionOperatorFactory.ColumnExprProcessor	Processor for column expressions.
PrunerExpressionOperatorFactory.DefaultExprProcessor	Processor for constants and null expressions.
PrunerExpressionOperatorFactory.FieldExprProcessor	FieldExprProcessor.
PrunerExpressionOperatorFactory.GenericFuncExprProcessor	If all children are candidates and refer only to one table alias then this expr is a candidate else it is not a candidate but its children could be final candidates.
PrunerOperatorFactory	Operator factory for pruning processing of operator graph We find all the filter operators that appear just beneath the table scan operators.
PrunerOperatorFactory.DefaultPruner	Default processor which just merges its children.
PrunerOperatorFactory.FilterPruner	Determines the partition pruner for the filter.
PrunerUtils	General utility common functions for the Pruner to do optimization.
ReduceSinkDeDuplication	If two reducer sink operators share the same partition/sort columns, we should merge them.
SamplePruner	The transformation step that does sample pruning.
SamplePruner.AddPathReturnStatus	Class used for return value of addPath()
SamplePruner.DefaultPPR	DefaultPPR default processor which does nothing.
SamplePruner.FilterPPR	FilterPPR filter processor.
SamplePruner.SamplePrunerCtx	SamplePrunerCtx.
SimpleFetchOptimizer	Tries to convert simple fetch query to single fetch task, which fetches rows directly from location of table/partition.
SkewJoinOptimizer	SkewJoinOptimizer.
SkewJoinOptimizer.SkewJoinOptProcCtx	SkewJoinOptProcCtx.
SkewJoinOptimizer.SkewJoinProc
SortedMergeBucketMapJoinOptimizer

Enum Summary

GroupByOptimizer.GroupByOptimizerSortMatch
SamplePruner.LimitPruneRetStatus