#include <topn-node.h>

Inheritance diagram for impala::TopNNode:

Collaboration diagram for impala::TopNNode:

Public Member Functions
	TopNNode (ObjectPool *pool, const TPlanNode &tnode, const DescriptorTbl &descs)

virtual Status	Init (const TPlanNode &tnode)

virtual Status	Prepare (RuntimeState *state)

virtual Status	Open (RuntimeState *state)

virtual Status	GetNext (RuntimeState state, RowBatch row_batch, bool *eos)

virtual Status	Reset (RuntimeState *state)

virtual void	Close (RuntimeState *state)

void	CollectNodes (TPlanNodeType::type node_type, std::vector< ExecNode * > *nodes)

void	CollectScanNodes (std::vector< ExecNode * > *nodes)
	Collect all scan node types. More...

std::string	DebugString () const
	Returns a string representation in DFS order of the plan rooted at this. More...

const std::vector< ExprContext * > &	conjunct_ctxs () const

int	id () const

TPlanNodeType::type	type () const

const RowDescriptor &	row_desc () const

int64_t	rows_returned () const

int64_t	limit () const

bool	ReachedLimit ()

RuntimeProfile *	runtime_profile ()

MemTracker *	mem_tracker ()

MemTracker *	expr_mem_tracker ()

Static Public Member Functions
static Status	CreateTree (ObjectPool pool, const TPlan &plan, const DescriptorTbl &descs, ExecNode *root)

static void	SetDebugOptions (int node_id, TExecNodePhase::type phase, TDebugAction::type action, ExecNode *tree)
	Set debug action for node with given id in 'tree'. More...

static bool	EvalConjuncts (ExprContext const ctxs, int num_ctxs, TupleRow *row)

static llvm::Function *	CodegenEvalConjuncts (RuntimeState state, const std::vector< ExprContext > &conjunct_ctxs, const char *name="EvalConjuncts")

static int	GetNodeIdFromProfile (RuntimeProfile *p)
	Extract node id from p->name(). More...

Static Public Attributes
static const std::string	ROW_THROUGHPUT_COUNTER = "RowsReturnedRate"
	Names of counters shared by all exec nodes. More...

Protected Member Functions
virtual void	DebugString (int indentation_level, std::stringstream *out) const

ExecNode *	child (int i)

bool	is_closed ()

virtual bool	IsScanNode () const

void	InitRuntimeProfile (const std::string &name)

Status	ExecDebugAction (TExecNodePhase::type phase, RuntimeState *state)

void	AddRuntimeExecOption (const std::string &option)
	Appends option to 'runtime_exec_options_'. More...

virtual Status	QueryMaintenance (RuntimeState *state)

void	AddExprCtxToFree (ExprContext *ctx)

void	AddExprCtxsToFree (const std::vector< ExprContext * > &ctxs)

void	AddExprCtxsToFree (const SortExecExprs &sort_exec_exprs)

Static Protected Member Functions
static Status	CreateNode (ObjectPool pool, const TPlanNode &tnode, const DescriptorTbl &descs, ExecNode *node)
	Create a single exec node derived from thrift node; place exec node in 'pool'. More...

static Status	CreateTreeHelper (ObjectPool pool, const std::vector< TPlanNode > &tnodes, const DescriptorTbl &descs, ExecNode parent, int node_idx, ExecNode *root)

Protected Attributes
int	id_

TPlanNodeType::type	type_

ObjectPool *	pool_

std::vector< ExprContext * >	conjunct_ctxs_

std::vector< ExecNode * >	children_

RowDescriptor	row_descriptor_

TExecNodePhase::type	debug_phase_

TDebugAction::type	debug_action_

int64_t	limit_

int64_t	num_rows_returned_

boost::scoped_ptr< RuntimeProfile >	runtime_profile_

RuntimeProfile::Counter *	rows_returned_counter_

RuntimeProfile::Counter *	rows_returned_rate_

boost::scoped_ptr< MemTracker >	mem_tracker_
	Account for peak memory used by this node. More...

boost::scoped_ptr< MemTracker >	expr_mem_tracker_
	MemTracker that should be used for ExprContexts. More...

boost::mutex	exec_options_lock_

std::string	runtime_exec_options_

Private Member Functions
void	InsertTupleRow (TupleRow *tuple_row)

void	PrepareForOutput ()
	Flatten and reverse the priority queue. More...

Private Attributes
int64_t	offset_
	Number of rows to skip. More...

int64_t	num_rows_skipped_

SortExecExprs	sort_exec_exprs_

std::vector< bool >	is_asc_order_

std::vector< bool >	nulls_first_

TupleDescriptor *	materialized_tuple_desc_
	Cached descriptor for the materialized tuple. Assigned in Prepare(). More...

boost::scoped_ptr < TupleRowComparator >	tuple_row_less_than_

boost::scoped_ptr < std::priority_queue< Tuple , std::vector< Tuple > , TupleRowComparator > >	priority_queue_

std::vector< Tuple * >	sorted_top_n_
	After computing the TopN in the priority_queue, pop them and put them in this vector. More...

std::vector< Tuple * >::iterator	get_next_iter_

boost::scoped_ptr< MemPool >	tuple_pool_
	Stores everything referenced in priority_queue_. More...

Tuple *	tmp_tuple_

Friends
class	TupleLessThan

Detailed Description

Node for in-memory TopN (ORDER BY ... LIMIT) This handles the case where the result fits in memory. This node will materialize its input rows into a new tuple using the expressions in sort_tuple_slot_exprs_ in its sort_exec_exprs_ member. TopN is implemented by storing rows in a priority queue.

Definition at line 38 of file topn-node.h.

Constructor & Destructor Documentation

TopNNode::TopNNode	(	ObjectPool *	pool,
		const TPlanNode &	tnode,
		const DescriptorTbl &	descs
	)

Definition at line 38 of file topn-node.cc.

Member Function Documentation

void impala::ExecNode::AddExprCtxsToFree ( const std::vector< ExprContext * > & ctxs )

protectedinherited

Referenced by impala::ExecNode::AddExprCtxsToFree(), impala::UnionNode::Prepare(), impala::SortNode::Prepare(), Prepare(), impala::ExchangeNode::Prepare(), impala::PartitionedHashJoinNode::Prepare(), impala::ExecNode::Prepare(), impala::PartitionedAggregationNode::Prepare(), and impala::HdfsScanNode::Prepare().

void impala::ExecNode::AddExprCtxsToFree ( const SortExecExprs & sort_exec_exprs )

protectedinherited

Definition at line 410 of file exec-node.cc.

References impala::ExecNode::AddExprCtxsToFree(), impala::SortExecExprs::lhs_ordering_expr_ctxs(), impala::SortExecExprs::rhs_ordering_expr_ctxs(), and impala::SortExecExprs::sort_tuple_slot_expr_ctxs().

void impala::ExecNode::AddExprCtxToFree ( ExprContext * ctx )

inlineprotectedinherited

Add an ExprContext to have its local allocations freed by QueryMaintenance(). Exprs that are evaluated in the main execution thread should be added. Exprs evaluated in a separate thread are generally not safe to add, since a local allocation may be freed while it's being used. Rather than using this mechanism, threads should call FreeLocalAllocations() on local ExprContexts periodically.

Definition at line 276 of file exec-node.h.

References impala::ExecNode::expr_ctxs_to_free_.

Referenced by impala::AnalyticEvalNode::Prepare().

void impala::ExecNode::AddRuntimeExecOption ( const std::string & option )

protectedinherited

Appends option to 'runtime_exec_options_'.

Definition at line 188 of file exec-node.cc.

References impala::RuntimeProfile::AddInfoString(), impala::ExecNode::exec_options_lock_, impala::ExecNode::runtime_exec_options_, and impala::ExecNode::runtime_profile().

Referenced by impala::PartitionedHashJoinNode::AttachProbeFilters(), impala::HashJoinNode::ConstructBuildSide(), impala::BlockingJoinNode::Open(), impala::HashJoinNode::Prepare(), impala::AggregationNode::Prepare(), impala::PartitionedHashJoinNode::Prepare(), impala::PartitionedAggregationNode::Prepare(), impala::HdfsScanNode::Prepare(), and impala::HdfsScanNode::StopAndFinalizeCounters().

ExecNode* impala::ExecNode::child ( int i )

inlineprotectedinherited

Definition at line 241 of file exec-node.h.

References impala::ExecNode::children_.

void TopNNode::Close ( RuntimeState * state )

virtual

Close() will get called for every exec node, regardless of what else is called and the status of these calls (i.e. Prepare() may never have been called, or Prepare()/Open()/GetNext() returned with an error). Close() releases all resources that were allocated in Open()/GetNext(), even if the latter ended with an error. Close() can be called if the node has been prepared or the node is closed. The default implementation updates runtime profile counters and calls Close() on the children. Subclasses should check if the node has already been closed (is_closed()), then close themselves, then call the base Close(). Nodes that are using tuples returned by a child may call Close() on their children before their own Close() if the child node has returned eos. It is only safe to call Close() on the child node while the parent node is still returning rows if the parent node fully materializes the child's input.

Reimplemented from impala::ExecNode.

Definition at line 136 of file topn-node.cc.

References impala::SortExecExprs::Close(), impala::ExecNode::Close(), impala::ExecNode::is_closed(), sort_exec_exprs_, and tuple_pool_.

Function * impala::ExecNode::CodegenEvalConjuncts	(	RuntimeState *	state,
		const std::vector< ExprContext * > &	conjunct_ctxs,
		const char *	name = `"EvalConjuncts"`
	)

staticinherited

Returns a codegen'd version of EvalConjuncts(), or NULL if the function couldn't be codegen'd. The codegen'd version uses inlined, codegen'd GetBooleanVal() functions.

Definition at line 452 of file exec-node.cc.

References impala::LlvmCodeGen::FnPrototype::AddArgument(), impala::LlvmCodeGen::context(), impala::CodegenAnyVal::CreateCallWrapped(), impala::LlvmCodeGen::false_value(), impala::LlvmCodeGen::FinalizeFunction(), impala::RuntimeState::GetCodegen(), impala::Status::GetDetail(), impala::CodegenAnyVal::GetIsNull(), impala::LlvmCodeGen::GetType(), impala::CodegenAnyVal::GetVal(), impala::TupleRow::LLVM_CLASS_NAME, impala::ExprContext::LLVM_CLASS_NAME, impala::Status::ok(), impala::LlvmCodeGen::true_value(), impala::ExecNode::type(), impala::TYPE_BOOLEAN, impala::TYPE_INT, and VLOG_QUERY.

Referenced by impala::HdfsAvroScanner::CodegenDecodeAvroData(), impala::HashJoinNode::CodegenProcessProbeBatch(), and impala::PartitionedHashJoinNode::CodegenProcessProbeBatch().

void impala::ExecNode::CollectNodes	(	TPlanNodeType::type	node_type,
		std::vector< ExecNode * > *	nodes
	)

inherited

Collect all nodes of given 'node_type' that are part of this subtree, and return in 'nodes'.

Definition at line 359 of file exec-node.cc.

References impala::ExecNode::children_, and impala::ExecNode::type_.

Referenced by impala::ExecNode::CollectScanNodes(), and impala::PlanFragmentExecutor::Prepare().

void impala::ExecNode::CollectScanNodes ( std::vector< ExecNode * > * nodes )

inherited

Collect all scan node types.

Definition at line 366 of file exec-node.cc.

References impala::ExecNode::CollectNodes().

Referenced by impala::PlanFragmentExecutor::Prepare().

const std::vector<ExprContext*>& impala::ExecNode::conjunct_ctxs ( ) const

inlineinherited

Definition at line 152 of file exec-node.h.

References impala::ExecNode::conjunct_ctxs_.

Referenced by impala::HdfsScanNode::ComputeSlotMaterializationOrder(), impala::SelectNode::CopyRows(), impala::UnionNode::EvalAndMaterializeExprs(), impala::HashJoinNode::GetNext(), impala::PartitionedHashJoinNode::OutputUnmatchedBuild(), impala::HashJoinNode::ProcessProbeBatch(), and impala::PartitionedHashJoinNode::ProcessProbeBatch().

Status impala::ExecNode::CreateNode	(	ObjectPool *	pool,
		const TPlanNode &	tnode,
		const DescriptorTbl &	descs,
		ExecNode **	node
	)

staticprotectedinherited

Create a single exec node derived from thrift node; place exec node in 'pool'.

Definition at line 260 of file exec-node.cc.

References impala::ObjectPool::Add(), impala::Status::OK, and RETURN_IF_ERROR.

Referenced by impala::ExecNode::CreateTreeHelper().

Status impala::ExecNode::CreateTree	(	ObjectPool *	pool,
		const TPlan &	plan,
		const DescriptorTbl &	descs,
		ExecNode **	root
	)

staticinherited

Creates exec node tree from list of nodes contained in plan via depth-first traversal. All nodes are placed in pool. Returns error if 'plan' is corrupted, otherwise success.

Definition at line 199 of file exec-node.cc.

References impala::ExecNode::CreateTreeHelper(), impala::Status::OK, and impala::Status::ok().

Referenced by impala::PlanFragmentExecutor::Prepare().

Status impala::ExecNode::CreateTreeHelper	(	ObjectPool *	pool,
		const std::vector< TPlanNode > &	tnodes,
		const DescriptorTbl &	descs,
		ExecNode *	parent,
		int *	node_idx,
		ExecNode **	root
	)

staticprotectedinherited

Definition at line 218 of file exec-node.cc.

References impala::RuntimeProfile::AddChild(), impala::ExecNode::children_, impala::ExecNode::CreateNode(), impala::Status::OK, RETURN_IF_ERROR, and impala::ExecNode::runtime_profile().

Referenced by impala::ExecNode::CreateTree().

void TopNNode::DebugString	(	int	indentation_level,
		std::stringstream *	out
	)		const

protectedvirtual

Recursive helper method for generating a string for DebugString(). Implementations should call DebugString(int, std::stringstream) on their children. Input parameters: indentation_level: Current level in plan tree. Output parameters: out: Stream to accumulate debug string.

Reimplemented from impala::ExecNode.

Definition at line 184 of file topn-node.cc.

References impala::ExecNode::DebugString(), impala::Expr::DebugString(), is_asc_order_, impala::SortExecExprs::lhs_ordering_expr_ctxs(), nulls_first_, and sort_exec_exprs_.

string impala::ExecNode::DebugString ( ) const

inherited

Returns a string representation in DFS order of the plan rooted at this.

Definition at line 345 of file exec-node.cc.

Referenced by impala::SortNode::DebugString(), DebugString(), impala::ExchangeNode::DebugString(), impala::AggregationNode::DebugString(), impala::AnalyticEvalNode::DebugString(), impala::PartitionedAggregationNode::DebugString(), impala::BlockingJoinNode::DebugString(), and impala::PlanFragmentExecutor::Prepare().

bool impala::ExecNode::EvalConjuncts	(	ExprContext const	ctxs,
		int	num_ctxs,
		TupleRow *	row
	)

staticinherited

Evaluate ExprContexts over row. Returns true if all exprs return true. TODO: This doesn't use the vector<Expr*> signature because I haven't figured out how to deal with declaring a templated std:vector type in IR

Definition at line 393 of file exec-node.cc.

References impala::ExprContext::GetBooleanVal(), impala_udf::AnyVal::is_null, and impala_udf::BooleanVal::val.

Referenced by impala::SelectNode::CopyRows(), impala::UnionNode::EvalAndMaterializeExprs(), impala::HdfsScanner::EvalConjuncts(), EvalOtherJoinConjuncts(), EvalOtherJoinConjuncts2(), impala::PartitionedHashJoinNode::EvaluateNullProbe(), impala::HBaseScanNode::GetNext(), impala::HashJoinNode::GetNext(), impala::AggregationNode::GetNext(), impala::PartitionedAggregationNode::GetNext(), impala::AnalyticEvalNode::GetNextOutputBatch(), impala::PartitionedHashJoinNode::OutputNullAwareProbeRows(), impala::PartitionedHashJoinNode::OutputUnmatchedBuild(), impala::CrossJoinNode::ProcessLeftChildBatch(), impala::HashJoinNode::ProcessProbeBatch(), and impala::PartitionedHashJoinNode::ProcessProbeBatch().

Status impala::ExecNode::ExecDebugAction	(	TExecNodePhase::type	phase,
		RuntimeState *	state
	)

protectedinherited

Executes debug_action_ if phase matches debug_phase_. 'phase' must not be INVALID.

Definition at line 378 of file exec-node.cc.

References impala::Status::CANCELLED, impala::ExecNode::debug_action_, impala::ExecNode::debug_phase_, impala::RuntimeState::is_cancelled(), and impala::Status::OK.

MemTracker* impala::ExecNode::expr_mem_tracker ( )

inlineinherited

Definition at line 163 of file exec-node.h.

References impala::ExecNode::expr_mem_tracker_.

Referenced by impala::PartitionedAggregationNode::Partition::InitStreams(), impala::SortNode::Prepare(), impala::UnionNode::Prepare(), Prepare(), impala::ExchangeNode::Prepare(), impala::HashJoinNode::Prepare(), impala::AggregationNode::Prepare(), impala::PartitionedHashJoinNode::Prepare(), impala::AnalyticEvalNode::Prepare(), impala::ExecNode::Prepare(), impala::PartitionedAggregationNode::Prepare(), and impala::HdfsScanNode::Prepare().

Status TopNNode::GetNext	(	RuntimeState *	state,
		RowBatch *	row_batch,
		bool *	eos
	)

virtual

Retrieves rows and returns them via row_batch. Sets eos to true if subsequent calls will not retrieve any more rows. Data referenced by any tuples returned in row_batch must not be overwritten by the callee until Close() is called. The memory holding that data can be returned via row_batch's tuple_data_pool (in which case it may be deleted by the caller) or held on to by the callee. The row_batch, including its tuple_data_pool, will be destroyed by the caller at some point prior to the final Close() call. In other words, if the memory holding the tuple data will be referenced by the callee in subsequent GetNext() calls, it must not be attached to the row_batch's tuple_data_pool. Caller must not be holding any io buffers. This will cause deadlock. TODO: AggregationNode and HashJoinNode cannot be "re-opened" yet.

Implements impala::ExecNode.

Definition at line 106 of file topn-node.cc.

References impala::RowBatch::AddRow(), impala::RowBatch::AtCapacity(), impala::RowBatch::CommitLastRow(), impala::RowBatch::CopyRow(), COUNTER_SET, impala::ExecNode::ExecDebugAction(), get_next_iter_, impala::RowBatch::GetRow(), impala::ExecNode::num_rows_returned_, num_rows_skipped_, offset_, impala::Status::OK, impala::ExecNode::QueryMaintenance(), RETURN_IF_CANCELLED, RETURN_IF_ERROR, impala::ExecNode::rows_returned_counter_, impala::ExecNode::runtime_profile_, SCOPED_TIMER, and sorted_top_n_.

Referenced by Open().

int impala::ExecNode::GetNodeIdFromProfile ( RuntimeProfile * p )

staticinherited

Extract node id from p->name().

Definition at line 62 of file exec-node.cc.

References impala::RuntimeProfile::metadata().

int impala::ExecNode::id ( ) const

inlineinherited

Definition at line 154 of file exec-node.h.

References impala::ExecNode::id_.

Status TopNNode::Init ( const TPlanNode & tnode )

virtual

Initializes this object from the thrift tnode desc. The subclass should do any initialization that can fail in Init() rather than the ctor. If overridden in subclass, must first call superclass's Init().

Reimplemented from impala::ExecNode.

Definition at line 44 of file topn-node.cc.

References impala::ExecNode::conjunct_ctxs_, impala::SortExecExprs::Init(), impala::ExecNode::Init(), is_asc_order_, nulls_first_, impala::Status::OK, impala::ExecNode::pool_, RETURN_IF_ERROR, and sort_exec_exprs_.

void impala::ExecNode::InitRuntimeProfile ( const std::string & name )

protectedinherited

Definition at line 371 of file exec-node.cc.

References impala::ExecNode::id_, impala::ExecNode::pool_, and impala::ExecNode::runtime_profile_.

Referenced by impala::ExecNode::ExecNode().

void TopNNode::InsertTupleRow ( TupleRow * tuple_row )

private

Inserts a tuple row into the priority queue if it's in the TopN. Creates a deep copy of tuple_row, which it stores in tuple_pool_.

Definition at line 144 of file topn-node.cc.

References impala::TupleDescriptor::byte_size(), impala::Tuple::DeepCopy(), impala::ExecNode::limit_, materialized_tuple_desc_, impala::Tuple::MaterializeExprs(), offset_, priority_queue_, sort_exec_exprs_, impala::SortExecExprs::sort_tuple_slot_expr_ctxs(), tmp_tuple_, tuple_pool_, and tuple_row_less_than_.

Referenced by Open().

bool impala::ExecNode::is_closed ( )

inlineprotectedinherited

Definition at line 242 of file exec-node.h.

References impala::ExecNode::is_closed_.

virtual bool impala::ExecNode::IsScanNode ( ) const

inlineprotectedvirtualinherited

Reimplemented in impala::ScanNode.

Definition at line 251 of file exec-node.h.

int64_t impala::ExecNode::limit ( ) const

inlineinherited

Definition at line 158 of file exec-node.h.

References impala::ExecNode::limit_.

Referenced by impala::CrossJoinNode::GetNext(), and impala::HashJoinNode::LeftJoinGetNext().

MemTracker* impala::ExecNode::mem_tracker ( )

inlineinherited

Definition at line 162 of file exec-node.h.

References impala::ExecNode::mem_tracker_.

Status TopNNode::Open ( RuntimeState * state )

virtual

Performs any preparatory work prior to calling GetNext(). Caller must not be holding any io buffers. This will cause deadlock. If overridden in subclass, must first call superclass's Open(). If a parent exec node adds slot filters (see RuntimeState::AddBitmapFilter()), they need to be added before calling Open() on the child that will consume them.

Reimplemented from impala::ExecNode.

Definition at line 70 of file topn-node.cc.

Status TopNNode::Prepare ( RuntimeState * state )

virtual

Sets up internal structures, etc., without doing any actual work. Must be called prior to Open(). Will only be called once in this node's lifetime. All code generation (adding functions to the LlvmCodeGen object) must happen in Prepare(). Retrieving the jit compiled function pointer must happen in Open(). If overridden in subclass, must first call superclass's Prepare().

Reimplemented from impala::ExecNode.

Definition at line 56 of file topn-node.cc.

References impala::ExecNode::AddExprCtxsToFree(), impala::TupleDescriptor::byte_size(), impala::ExecNode::child(), impala::ExecNode::expr_mem_tracker(), materialized_tuple_desc_, impala::ExecNode::mem_tracker(), impala::Status::OK, impala::SortExecExprs::Prepare(), impala::ExecNode::Prepare(), RETURN_IF_ERROR, impala::ExecNode::row_desc(), impala::ExecNode::row_descriptor_, impala::ExecNode::runtime_profile_, SCOPED_TIMER, sort_exec_exprs_, tmp_tuple_, impala::RowDescriptor::tuple_descriptors(), and tuple_pool_.

void TopNNode::PrepareForOutput ( )

private

Flatten and reverse the priority queue.

Definition at line 170 of file topn-node.cc.

References get_next_iter_, priority_queue_, and sorted_top_n_.

Referenced by Open().

Status impala::ExecNode::QueryMaintenance ( RuntimeState * state )

protectedvirtualinherited

Frees any local allocations made by expr_ctxs_to_free_ and returns the result of state->CheckQueryState(). Nodes should call this periodically, e.g. once per input row batch. This should not be called outside the main execution thread. Nodes may override this to add extra periodic cleanup, e.g. freeing other local allocations. ExecNodes overriding this function should return ExecNode::QueryMaintenance().

Reimplemented in impala::PartitionedAggregationNode, and impala::AnalyticEvalNode.

Definition at line 401 of file exec-node.cc.

References impala::RuntimeState::CheckQueryState(), impala::ExecNode::expr_ctxs_to_free_, and impala::ExprContext::FreeLocalAllocations().

bool impala::ExecNode::ReachedLimit ( )

inlineinherited

Definition at line 159 of file exec-node.h.

References impala::ExecNode::limit_, and impala::ExecNode::num_rows_returned_.

Status TopNNode::Reset ( RuntimeState * state )

virtual

Resets all data-specific state, returning this node to the state it was in after calling Prepare() and before calling Open(). Prepare() must have already been called before calling Reset(). Open() and GetNext() may have optionally been called. Close() must not have been called. If overridden in a subclass, must call superclass's Reset() at the end. The default implementation calls Reset() on children. Note that this function may be called many times, so should be fast. For example, accumulated memory does not need to be freed on every call if it's expensive.

Reimplemented from impala::ExecNode.

Definition at line 131 of file topn-node.cc.

const RowDescriptor& impala::ExecNode::row_desc ( ) const

inlineinherited

Definition at line 156 of file exec-node.h.

References impala::ExecNode::row_descriptor_.

int64_t impala::ExecNode::rows_returned ( ) const

inlineinherited

Definition at line 157 of file exec-node.h.

References impala::ExecNode::num_rows_returned_.

Referenced by impala::CrossJoinNode::GetNext(), impala::AnalyticEvalNode::GetNext(), impala::HashJoinNode::LeftJoinGetNext(), impala::PartitionedAggregationNode::Open(), impala::HdfsSequenceScanner::ProcessDecompressedBlock(), impala::CrossJoinNode::ProcessLeftChildBatch(), impala::HashJoinNode::ProcessProbeBatch(), and impala::HdfsTextScanner::WriteFields().

RuntimeProfile* impala::ExecNode::runtime_profile ( )

inlineinherited

Definition at line 161 of file exec-node.h.

References impala::ExecNode::runtime_profile_.

void impala::ExecNode::SetDebugOptions	(	int	node_id,
		TExecNodePhase::type	phase,
		TDebugAction::type	action,
		ExecNode *	tree
	)

staticinherited

Set debug action for node with given id in 'tree'.

Definition at line 332 of file exec-node.cc.

References impala::ExecNode::children_, impala::ExecNode::debug_action_, impala::ExecNode::debug_phase_, and impala::ExecNode::id_.

Referenced by impala::PlanFragmentExecutor::Prepare().

TPlanNodeType::type impala::ExecNode::type ( ) const

inlineinherited

Definition at line 155 of file exec-node.h.

References impala::ExecNode::type_.

Referenced by impala::ExecNode::CodegenEvalConjuncts(), impala::PartitionedAggregationNode::CodegenUpdateTuple(), and impala::PlanFragmentExecutor::Prepare().

Friends And Related Function Documentation

friend class TupleLessThan

friend

Definition at line 54 of file topn-node.h.

Member Data Documentation

std::vector<ExecNode*> impala::ExecNode::children_

protectedinherited

Definition at line 214 of file exec-node.h.

Referenced by impala::ExecNode::child(), impala::ExecNode::Close(), impala::ExecNode::CollectNodes(), impala::ExecNode::CreateTreeHelper(), impala::HBaseScanNode::DebugString(), impala::UnionNode::GetNext(), impala::UnionNode::Open(), impala::AggregationNode::Open(), impala::PartitionedAggregationNode::Open(), impala::UnionNode::OpenCurrentChild(), impala::ExecNode::Prepare(), impala::PartitionedAggregationNode::ProcessStream(), impala::ExecNode::Reset(), and impala::ExecNode::SetDebugOptions().

std::vector<ExprContext*> impala::ExecNode::conjunct_ctxs_

protectedinherited

Definition at line 212 of file exec-node.h.

Referenced by impala::ExecNode::Close(), impala::HashJoinNode::CodegenProcessProbeBatch(), impala::PartitionedHashJoinNode::CodegenProcessProbeBatch(), impala::ExecNode::conjunct_ctxs(), impala::SelectNode::CopyRows(), impala::UnionNode::EvalAndMaterializeExprs(), impala::HBaseScanNode::GetNext(), impala::HashJoinNode::GetNext(), impala::AggregationNode::GetNext(), impala::PartitionedAggregationNode::GetNext(), impala::AnalyticEvalNode::GetNextOutputBatch(), Init(), impala::ExecNode::Init(), impala::PartitionedHashJoinNode::Init(), impala::ExecNode::Open(), impala::PartitionedHashJoinNode::OutputUnmatchedBuild(), impala::ExecNode::Prepare(), impala::CrossJoinNode::ProcessLeftChildBatch(), impala::HashJoinNode::ProcessProbeBatch(), and impala::PartitionedHashJoinNode::ProcessProbeBatch().

TDebugAction::type impala::ExecNode::debug_action_

protectedinherited

Definition at line 220 of file exec-node.h.

Referenced by impala::ExecNode::ExecDebugAction(), and impala::ExecNode::SetDebugOptions().

TExecNodePhase::type impala::ExecNode::debug_phase_

protectedinherited

debug-only: if debug_action_ is not INVALID, node will perform action in debug_phase_

Definition at line 219 of file exec-node.h.

Referenced by impala::ExecNode::ExecDebugAction(), and impala::ExecNode::SetDebugOptions().

boost::mutex impala::ExecNode::exec_options_lock_

protectedinherited

Execution options that are determined at runtime. This is added to the runtime profile at Close(). Examples for options logged here would be "Codegen Enabled"

Definition at line 238 of file exec-node.h.

Referenced by impala::ExecNode::AddRuntimeExecOption().

boost::scoped_ptr<MemTracker> impala::ExecNode::expr_mem_tracker_

protectedinherited

MemTracker that should be used for ExprContexts.

Definition at line 233 of file exec-node.h.

Referenced by impala::ExecNode::expr_mem_tracker(), and impala::ExecNode::Prepare().

std::vector<Tuple*>::iterator impala::TopNNode::get_next_iter_

private

Definition at line 87 of file topn-node.h.

Referenced by GetNext(), and PrepareForOutput().

int impala::ExecNode::id_

protectedinherited

Definition at line 209 of file exec-node.h.

Referenced by impala::PartitionedAggregationNode::CreateHashPartitions(), impala::ExecNode::id(), impala::ExecNode::InitRuntimeProfile(), impala::PartitionedAggregationNode::NextPartition(), impala::ExchangeNode::Prepare(), impala::PartitionedHashJoinNode::PrepareNextPartition(), impala::PartitionedHashJoinNode::ProcessBuildInput(), and impala::ExecNode::SetDebugOptions().

std::vector<bool> impala::TopNNode::is_asc_order_

private

Definition at line 70 of file topn-node.h.

Referenced by DebugString(), Init(), and Open().

int64_t impala::ExecNode::limit_

protectedinherited

Definition at line 222 of file exec-node.h.

Referenced by impala::SortNode::GetNext(), impala::HdfsScanNode::GetNextInternal(), impala::ExchangeNode::GetNextMerging(), InsertTupleRow(), impala::HdfsScanNode::limit(), impala::ExecNode::limit(), Open(), and impala::ExecNode::ReachedLimit().

TupleDescriptor* impala::TopNNode::materialized_tuple_desc_

private

Cached descriptor for the materialized tuple. Assigned in Prepare().

Definition at line 73 of file topn-node.h.

Referenced by InsertTupleRow(), and Prepare().

boost::scoped_ptr<MemTracker> impala::ExecNode::mem_tracker_

protectedinherited

Account for peak memory used by this node.

Definition at line 230 of file exec-node.h.

Referenced by impala::ExecNode::mem_tracker(), and impala::ExecNode::Prepare().

std::vector<bool> impala::TopNNode::nulls_first_

private

Definition at line 71 of file topn-node.h.

Referenced by DebugString(), Init(), and Open().

int64_t impala::ExecNode::num_rows_returned_

protectedinherited

int64_t impala::TopNNode::num_rows_skipped_

private

Definition at line 65 of file topn-node.h.

Referenced by GetNext().

int64_t impala::TopNNode::offset_

private

Number of rows to skip.

Definition at line 64 of file topn-node.h.

Referenced by GetNext(), InsertTupleRow(), and Open().

ObjectPool* impala::ExecNode::pool_

protectedinherited

Definition at line 211 of file exec-node.h.

Referenced by impala::SortNode::Init(), impala::UnionNode::Init(), Init(), impala::ExchangeNode::Init(), impala::HashJoinNode::Init(), impala::AggregationNode::Init(), impala::ExecNode::Init(), impala::PartitionedHashJoinNode::Init(), impala::AnalyticEvalNode::Init(), impala::PartitionedAggregationNode::Init(), impala::ExecNode::InitRuntimeProfile(), impala::HdfsScanNode::Open(), impala::PartitionedHashJoinNode::Prepare(), and impala::PartitionedHashJoinNode::ProcessBuildInput().

boost::scoped_ptr< std::priority_queue<Tuple*, std::vector<Tuple*>, TupleRowComparator> > impala::TopNNode::priority_queue_

private

The priority queue will never have more elements in it than the LIMIT + OFFSET. The stl priority queue doesn't support a max size, so to get that functionality, the order of the queue is the opposite of what the ORDER BY clause specifies, such that the top of the queue is the last sorted element.

Definition at line 83 of file topn-node.h.

Referenced by InsertTupleRow(), Open(), and PrepareForOutput().

RowDescriptor impala::ExecNode::row_descriptor_

protectedinherited

Definition at line 215 of file exec-node.h.

Referenced by impala::SortNode::Open(), impala::SortNode::Prepare(), Prepare(), impala::ExchangeNode::Prepare(), and impala::ExecNode::row_desc().

const string impala::ExecNode::ROW_THROUGHPUT_COUNTER = "RowsReturnedRate"

staticinherited

Names of counters shared by all exec nodes.

Definition at line 169 of file exec-node.h.

Referenced by impala::ExecNode::Prepare().

RuntimeProfile::Counter* impala::ExecNode::rows_returned_counter_

protectedinherited

RuntimeProfile::Counter* impala::ExecNode::rows_returned_rate_

protectedinherited

Definition at line 227 of file exec-node.h.

Referenced by impala::ExecNode::Prepare().

std::string impala::ExecNode::runtime_exec_options_

protectedinherited

Definition at line 239 of file exec-node.h.

Referenced by impala::ExecNode::AddRuntimeExecOption().

boost::scoped_ptr<RuntimeProfile> impala::ExecNode::runtime_profile_

protectedinherited

Definition at line 225 of file exec-node.h.

SortExecExprs impala::TopNNode::sort_exec_exprs_

private

sort_exec_exprs_ contains the ordering expressions used for tuple comparison and the materialization exprs for the output tuple.

Definition at line 69 of file topn-node.h.

Referenced by Close(), DebugString(), Init(), InsertTupleRow(), Open(), and Prepare().

std::vector<Tuple*> impala::TopNNode::sorted_top_n_

private

After computing the TopN in the priority_queue, pop them and put them in this vector.

Definition at line 86 of file topn-node.h.

Referenced by GetNext(), and PrepareForOutput().

Tuple* impala::TopNNode::tmp_tuple_

private

Tuple allocated once from tuple_pool_ and reused in InsertTupleRow to materialize input tuples if necessary. After materialization, tmp_tuple_ may be copied into the the tuple pool and inserted into the priority queue.

Definition at line 94 of file topn-node.h.

Referenced by InsertTupleRow(), and Prepare().

boost::scoped_ptr<MemPool> impala::TopNNode::tuple_pool_

private

Stores everything referenced in priority_queue_.

Definition at line 90 of file topn-node.h.

Referenced by Close(), InsertTupleRow(), and Prepare().

boost::scoped_ptr<TupleRowComparator> impala::TopNNode::tuple_row_less_than_

private

Definition at line 75 of file topn-node.h.

Referenced by InsertTupleRow(), and Open().

TPlanNodeType::type impala::ExecNode::type_

protectedinherited

Definition at line 210 of file exec-node.h.

Referenced by impala::ExecNode::CollectNodes(), and impala::ExecNode::type().

The documentation for this class was generated from the following files:

be/src/exec/topn-node.h
be/src/exec/topn-node.cc

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