#include <descriptors.h>

Collaboration diagram for impala::TupleDescriptor:

Public Member Functions
int	byte_size () const

int	num_null_bytes () const

const std::vector < SlotDescriptor * > &	slots () const

const std::vector < SlotDescriptor * > &	string_slots () const

const TableDescriptor *	table_desc () const

TupleId	id () const

std::string	DebugString () const

llvm::StructType *	GenerateLlvmStruct (LlvmCodeGen *codegen)

Protected Member Functions
	TupleDescriptor (const TTupleDescriptor &tdesc)

void	AddSlot (SlotDescriptor *slot)

Protected Attributes
const TupleId	id_

TableDescriptor *	table_desc_

const int	byte_size_

const int	num_null_bytes_

int	num_materialized_slots_

std::vector< SlotDescriptor * >	slots_

std::vector< SlotDescriptor * >	string_slots_

llvm::StructType *	llvm_struct_

Friends
class	DescriptorTbl

Detailed Description

Definition at line 298 of file descriptors.h.

Constructor & Destructor Documentation

impala::TupleDescriptor::TupleDescriptor ( const TTupleDescriptor & tdesc )

protected

Definition at line 232 of file descriptors.cc.

Member Function Documentation

void impala::TupleDescriptor::AddSlot ( SlotDescriptor * slot )

protected

Definition at line 242 of file descriptors.cc.

References impala::SlotDescriptor::is_materialized(), impala::ColumnType::IsVarLen(), num_materialized_slots_, slots_, string_slots_, and impala::SlotDescriptor::type().

int impala::TupleDescriptor::byte_size ( ) const

inline

Definition at line 300 of file descriptors.h.

References byte_size_.

Referenced by impala::AnalyticEvalNode::AddResultTuple(), impala::BufferedTupleStream::BufferedTupleStream(), impala::PartitionedAggregationNode::CleanupHashTbl(), impala::AggregationNode::Close(), impala::HdfsScanner::CodegenWriteCompleteTuple(), impala::HdfsScanner::CommitRows(), impala::AggregationNode::ConstructIntermediateTuple(), impala::PartitionedAggregationNode::ConstructIntermediateTuple(), impala::Tuple::DeepCopy(), impala::UnionNode::EvalAndMaterializeExprs(), impala::AggregationNode::FinalizeTuple(), GenerateLlvmStruct(), impala::HBaseScanNode::GetNext(), impala::PartitionedAggregationNode::GetOutputTuple(), impala::Sorter::Init(), impala::HdfsScanNode::InitEmptyTemplateTuple(), impala::AnalyticEvalNode::InitNextPartition(), impala::TopNNode::InsertTupleRow(), impala::DataSourceScanNode::MaterializeNextRow(), impala::AnalyticEvalNode::Open(), impala::TopNNode::Prepare(), impala::HdfsTextScanner::ResetScanner(), and impala::HdfsTextScanner::WriteFields().

string impala::TupleDescriptor::DebugString ( ) const

Definition at line 250 of file descriptors.cc.

References byte_size_, id_, slots_, and table_desc_.

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

StructType * impala::TupleDescriptor::GenerateLlvmStruct ( LlvmCodeGen * codegen )

Creates a typed struct description for llvm. The layout of the struct is computed by the FE which includes the order of the fields in the resulting struct. Returns the struct type or NULL if the type could not be created. For example, the aggregation tuple for this query: select count(*), min(int_col_a) would map to: struct Tuple { int8_t null_byte; int32_t min_a; int64_t count_val; }; The resulting struct definition is cached.

Definition at line 556 of file descriptors.cc.

References byte_size(), impala::LlvmCodeGen::context(), impala::LlvmCodeGen::execution_engine(), impala::SlotDescriptor::field_idx(), impala::SlotDescriptor::field_idx_, impala::LlvmCodeGen::GetType(), impala::SlotDescriptor::is_materialized(), llvm_struct_, num_materialized_slots_, num_null_bytes_, impala::SlotDescriptor::slot_idx_, slots(), impala::SlotDescriptor::tuple_offset(), impala::ColumnType::type, impala::SlotDescriptor::type(), impala::TYPE_CHAR, and impala::TYPE_TINYINT.