Package org.apache.hadoop.hive.ql.exec

Hive QL execution tasks, operators, functions and other handlers.

See: Description

Interface Summary

Interface	Description
BucketMatcher
DynamicValueRegistry
FileSinkOperator.RecordWriter	RecordWriter.
HashTableLoader	HashTableLoader is an interface used by MapJoinOperator used to load the hashtables needed to process the join.
NodeUtils.Function<T>
ObjectCache	ObjectCache.
Operator.OperatorFunc	OperatorFunc.
PTFPartition.PTFPartitionIterator<T>
RecordReader	RecordReader.
RecordWriter	RecordWriter.
TopNHash.BinaryCollector	For interaction between operator and top-n hash.
UDAFEvaluator	Interface that encapsulates the evaluation logic of a UDAF.
UDAFEvaluatorResolver	The UDF Method resolver interface.
UDFMethodResolver	The UDF Method resolver interface.

Class Summary

Class	Description
AbstractFileMergeOperator<T extends FileMergeDesc>	Fast file merge operator for ORC and RCfile.
AbstractMapJoinOperator<T extends MapJoinDesc>
AbstractMapOperator	Abstract Map operator.
AddToClassPathAction	Helper class to create UDFClassLoader when running under a security manager.
AppMasterEventOperator	AppMasterEventOperator sends any rows it receives to the Tez AM.
ArchiveUtils	ArchiveUtils.
ArchiveUtils.HarPathHelper	HarPathHelper helps to create har:/ URIs for locations inside of archive.
ArchiveUtils.PartSpecInfo	PartSpecInfo keeps fields and values extracted from partial partition info which is prefix of the full info.
AutoProgressor	AutoProgressor periodically sends updates to the job tracker so that it doesn't consider this task attempt dead if there is a long period of inactivity.
BinaryRecordReader	Read from a binary stream and treat each 1000 bytes (configurable via hive.binary.record.max.length) as a record.
ByteWritable	Deprecated
ByteWritable.Comparator	A Comparator optimized for BytesWritable.
CollectOperator	Buffers rows emitted by other operators.
ColumnInfo	Implementation for ColumnInfo which contains the internal name for the column (the one that is used by the operator to access the column) and the type (identified by a java class).
ColumnStatsTask	ColumnStatsTask implementation.
ColumnStatsUpdateTask	ColumnStatsUpdateTask implementation.
CommonJoinOperator<T extends JoinDesc>	Join operator implementation.
CommonMergeJoinOperator
ComparisonOpMethodResolver	The class implements the method resolution for operators like (> < <= >= = <>).
ConditionalTask	Conditional Task implementation.
CopyTask	CopyTask implementation.
DDLTask	DDLTask implementation.
DefaultBucketMatcher
DefaultUDAFEvaluatorResolver	The default UDAF Method resolver.
DefaultUDFMethodResolver	The default UDF Method resolver.
DemuxOperator	DemuxOperator is an operator used by MapReduce Jobs optimized by CorrelationOptimizer.
DependencyCollectionTask	DependencyCollectionTask.
DummyStoreOperator	For SortMerge joins, this is a dummy operator, which stores the row for the small table before it reaches the sort merge join operator.
DynamicValueRegistry.RegistryConf
ExplainSQRewriteTask
ExplainTask	ExplainTask implementation.
ExprNodeColumnEvaluator	This evaluator gets the column from the row object.
ExprNodeConstantEvaluator	ExprNodeConstantEvaluator.
ExprNodeDynamicValueEvaluator	ExprNodeDynamicEvaluator.
ExprNodeEvaluator<T extends ExprNodeDesc>	ExprNodeEvaluator.
ExprNodeEvaluatorFactory	ExprNodeEvaluatorFactory.
ExprNodeEvaluatorHead	Increases version number of each evaluations for correct caching
ExprNodeEvaluatorRef	Returns evaluation result of other evaluator
ExprNodeFieldEvaluator	This Evaluator can evaluate s.f for s as both struct and list of struct.
ExprNodeGenericFuncEvaluator	ExprNodeGenericFuncEvaluator.
FetchOperator	FetchTask implementation.
FetchTask	FetchTask implementation.
FileSinkOperator	File Sink operator implementation.
FilterOperator	Filter operator implementation.
FooterBuffer
ForwardOperator	Forward Operator Just forwards.
FunctionInfo	FunctionInfo.
FunctionInfo.FunctionResource
FunctionRegistry	FunctionRegistry.
FunctionTask	FunctionTask.
FunctionUtils
GlobalWorkMapFactory
GroupByOperator	GroupBy operator implementation.
HashTableDummyOperator
HashTableSinkOperator
HiveTotalOrderPartitioner
JoinOperator	Join operator implementation.
JoinUtil
KeyWrapper
KeyWrapperFactory
LateralViewForwardOperator	LateralViewForwardOperator.
LateralViewJoinOperator	The lateral view join operator is used for FROM src LATERAL VIEW udtf()...
LimitOperator	Limit operator implementation Limits the number of rows to be passed on.
ListSinkOperator	For fetch task with operator tree, row read from FetchOperator is processed via operator tree and finally arrives to this operator.
MapJoinOperator	Map side Join operator implementation.
MapOperator	Map operator.
MapOperator.MapOpCtx
MapredContext	Runtime context of MapredTask providing additional information to GenericUDF
MoveTask	MoveTask implementation.
MuxOperator	MuxOperator is used in the Reduce side of MapReduce jobs optimized by Correlation Optimizer.
MuxOperator.Handler	Handler is used to construct the key-value structure.
NodeUtils	Simple node iterating utils
NumericOpMethodResolver	The class implements the method resolution for operators like (+, -, *, %).
NumericUDAF	Base class of numeric UDAFs like sum and avg which need a NumericUDAFEvaluatorResolver.
NumericUDAFEvaluatorResolver	Resolver for Numeric UDAFs like sum and avg.
ObjectCacheFactory	ObjectCacheFactory returns the appropriate cache depending on settings in the hive conf.
ObjectCacheWrapper
Operator<T extends OperatorDesc>	Base operator implementation.
OperatorFactory	OperatorFactory.
OperatorUtils
OrcFileMergeOperator	Fast file merge operator for ORC files.
PartitionKeySampler
PTFOperator
PTFPartition
PTFRollingPartition
PTFTopNHash
PTFUtils
PTFUtils.Predicate<T>
PTFUtils.ReverseIterator<T>
RCFileMergeOperator	Fast file merge operator for RC files.
ReduceSinkOperator	Reduce Sink Operator sends output to the reduce stage.
Registry
ReplCopyTask
RowSchema	RowSchema Implementation.
ScriptOperator	ScriptOperator.
SecureCmdDoAs	SecureCmdDoAs - Helper class for setting parameters and env necessary for being able to run child jvm as intended user.
SelectOperator	Select operator implementation.
SerializationUtilities	Utilities related to serialization and deserialization.
SerializationUtilities.Hook
SkewJoinHandler	At runtime in Join, we output big keys in one table into one corresponding directories, and all same keys in other tables into different dirs(one for each table).
SMBMapJoinOperator	Sorted Merge Map Join Operator.
SparkHashTableSinkOperator
Stat
StatsNoJobTask	StatsNoJobTask is used in cases where stats collection is the only task for the given query (no parent MR or Tez job).
StatsTask	StatsTask implementation.
TableScanOperator	Table Scan Operator If the data is coming from the map-reduce framework, just forward it.
Task<T extends Serializable>	Task implementation.
TaskFactory	TaskFactory implementation.
TaskFactory.TaskTuple<T extends Serializable>	taskTuple.
TaskHandle	TaskHandle.
TaskResult	TaskResult implementation.
TaskRunner	TaskRunner implementation.
TemporaryHashSinkOperator
TerminalOperator<T extends OperatorDesc>	Terminal Operator Base Class.
TextRecordReader	TextRecordReader.
TextRecordWriter	TextRecordWriter.
TezDummyStoreOperator	A dummy store operator same as the dummy store operator but for tez.
TopNHash	Stores binary key/value in sorted manner to get top-n key/value TODO: rename to TopNHeap?
UDAF	Deprecated Either implement GenericUDAFResolver2 or extend AbstractGenericUDAFResolver instead.
UDF	A User-defined function (UDF) for use with Hive.
UDFClassLoader	UDFClassLoader is used to dynamically register udf (and related) jars This was introducted to fix HIVE-11878 Each session will have its own instance of UDFClassLoader This is to support HiveServer2 where there can be multiple active sessions.
UDTFOperator	UDTFOperator.
UnionOperator	Union Operator Just forwards.
Utilities	Utilities.
Utilities.CollectionPersistenceDelegate
Utilities.SQLCommand<T>
WindowFunctionInfo

Enum Summary

Enum	Description
AbstractMapOperator.Counter	Counter.
FileSinkOperator.Counter	Counters.
FunctionInfo.FunctionType
FunctionUtils.FunctionType	Function type, for permanent functions.
FunctionUtils.UDFClassType	Enum type to describe what kind of UDF implementation class
JoinOperator.SkewkeyTableCounter	SkewkeyTableCounter.
JoinUtil.JoinResult	Represents the join result between two tables
Operator.State	State.
ReduceSinkOperator.Counter	Counters.
ScriptOperator.Counter	Counter.
Task.FeedType
Task.TaskState
Utilities.ReduceField	ReduceField: KEY: record key VALUE: record value
Utilities.StreamStatus	StreamStatus.

Exception Summary

Exception	Description
AmbiguousMethodException	Exception thrown by the UDF and UDAF method resolvers in case a unique method is not found.
NoMatchingMethodException	Exception thrown by the UDF and UDAF method resolvers in case no matching method is found.
TaskExecutionException	Exception thrown by any task processor to signal a problem with task execution.
UDFArgumentException	exception class, thrown when udf argument have something wrong.
UDFArgumentLengthException	exception class, thrown when udf arguments have wrong length.
UDFArgumentTypeException	exception class, thrown when udf arguments have wrong types.

Annotation Types Summary

Annotation Type	Description
Description	Description.
PartitionTableFunctionDescription
WindowFunctionDescription

Package org.apache.hadoop.hive.ql.exec Description

Hive QL execution tasks, operators, functions and other handlers.