impala::Literal Class Reference

#include <literal.h>

Inheritance diagram for impala::Literal:

Collaboration diagram for impala::Literal:

Public Member Functions
	Literal (ColumnType type, bool v)
	Test ctors. More...
	Literal (ColumnType type, int8_t v)
	Literal (ColumnType type, int16_t v)
	Literal (ColumnType type, int32_t v)
	Literal (ColumnType type, int64_t v)
	Literal (ColumnType type, float v)
	Literal (ColumnType type, double v)
	Literal (ColumnType type, const std::string &v)
	Literal (ColumnType type, const StringValue &v)
virtual Status	GetCodegendComputeFn (RuntimeState *state, llvm::Function **fn)
virtual impala_udf::BooleanVal	GetBooleanVal (ExprContext *, TupleRow *)
virtual impala_udf::TinyIntVal	GetTinyIntVal (ExprContext *, TupleRow *)
virtual impala_udf::SmallIntVal	GetSmallIntVal (ExprContext *, TupleRow *)
virtual impala_udf::IntVal	GetIntVal (ExprContext *, TupleRow *)
virtual impala_udf::BigIntVal	GetBigIntVal (ExprContext *, TupleRow *)
virtual impala_udf::FloatVal	GetFloatVal (ExprContext *, TupleRow *)
virtual impala_udf::DoubleVal	GetDoubleVal (ExprContext *, TupleRow *)
virtual impala_udf::StringVal	GetStringVal (ExprContext *, TupleRow *)
virtual impala_udf::DecimalVal	GetDecimalVal (ExprContext *, TupleRow *)
virtual TimestampVal	GetTimestampVal (ExprContext *context, TupleRow *)
int	output_scale () const
void	AddChild (Expr *expr)
Expr *	GetChild (int i) const
int	GetNumChildren () const
const ColumnType &	type () const
bool	is_slotref () const
const std::vector< Expr * > &	children () const
virtual bool	IsConstant () const
virtual int	GetSlotIds (std::vector< SlotId > *slot_ids) const
virtual AnyVal *	GetConstVal (ExprContext *context)

Static Public Member Functions
static Literal *	CreateLiteral (const ColumnType &type, const std::string &str)
static Status	CreateExprTree (ObjectPool *pool, const TExpr &texpr, ExprContext **ctx)
static Status	CreateExprTrees (ObjectPool *pool, const std::vector< TExpr > &texprs, std::vector< ExprContext * > *ctxs)
static Status	Prepare (const std::vector< ExprContext * > &ctxs, RuntimeState *state, const RowDescriptor &row_desc, MemTracker *tracker)
static Status	Open (const std::vector< ExprContext * > &ctxs, RuntimeState *state)
	Convenience function for opening multiple expr trees. More...
static Status	Clone (const std::vector< ExprContext * > &ctxs, RuntimeState *state, std::vector< ExprContext * > *new_ctxs)
static void	Close (const std::vector< ExprContext * > &ctxs, RuntimeState *state)
	Convenience function for closing multiple expr trees. More...
static Expr *	CreateLiteral (ObjectPool *pool, const ColumnType &type, void *data)
static Expr *	CreateLiteral (ObjectPool *pool, const ColumnType &type, const std::string &)
static int	ComputeResultsLayout (const std::vector< Expr * > &exprs, std::vector< int > *offsets, int *var_result_begin)
static int	ComputeResultsLayout (const std::vector< ExprContext * > &ctxs, std::vector< int > *offsets, int *var_result_begin)
static std::string	DebugString (const std::vector< Expr * > &exprs)
static std::string	DebugString (const std::vector< ExprContext * > &ctxs)
static void	InitBuiltinsDummy ()

Static Public Attributes
static const char *	LLVM_CLASS_NAME = "class.impala::Expr"

Protected Member Functions
	Literal (const TExprNode &node)
virtual std::string	DebugString () const
virtual Status	Prepare (RuntimeState *state, const RowDescriptor &row_desc, ExprContext *context)
virtual Status	Open (RuntimeState *state, ExprContext *context, FunctionContext::FunctionStateScope scope=FunctionContext::FRAGMENT_LOCAL)
virtual void	Close (RuntimeState *state, ExprContext *context, FunctionContext::FunctionStateScope scope=FunctionContext::FRAGMENT_LOCAL)
	Subclasses overriding this function should call Expr::Close(). More...
std::string	DebugString (const std::string &expr_name) const
	Simple debug string that provides no expr subclass-specific information. More...
FunctionContext *	RegisterFunctionContext (ExprContext *ctx, RuntimeState *state, int varargs_buffer_size=0)
llvm::Function *	CreateIrFunctionPrototype (LlvmCodeGen *codegen, const std::string &name, llvm::Value *(*args)[2])
Status	GetCodegendComputeFnWrapper (RuntimeState *state, llvm::Function **fn)
llvm::Function *	GetStaticGetValWrapper (ColumnType type, LlvmCodeGen *codegen)

Protected Attributes
LibCache::LibCacheEntry *	cache_entry_
	Cache entry for the library implementing this function. More...
TFunction	fn_
	Function description. More...
const bool	is_slotref_
	recognize if this node is a slotref in order to speed up GetValue() More...
const ColumnType	type_
	analysis is done, types are fixed at this point More...
std::vector< Expr * >	children_
int	output_scale_
int	context_index_
llvm::Function *	ir_compute_fn_
	Cached codegened compute function. Exprs should set this in GetCodegendComputeFn(). More...
boost::scoped_ptr< AnyVal >	constant_val_

Private Attributes
ExprValue	value_

Friends
class	Expr

Detailed Description

Definition at line 28 of file literal.h.

Constructor & Destructor Documentation

impala::Literal::Literal	(	ColumnType	type,
		bool	v
	)

Test ctors.

Definition at line 124 of file literal.cc.

References impala::ExprValue::bool_val, impala::ColumnType::type, impala::Expr::type(), impala::TYPE_BOOLEAN, and value_.

Referenced by CreateLiteral().

impala::Literal::Literal	(	ColumnType	type,
		int8_t	v
	)

Definition at line 130 of file literal.cc.

References impala::ExprValue::tinyint_val, impala::ColumnType::type, impala::Expr::type(), impala::TYPE_TINYINT, and value_.

impala::Literal::Literal	(	ColumnType	type,
		int16_t	v
	)

Definition at line 136 of file literal.cc.

References impala::ExprValue::smallint_val, impala::ColumnType::type, impala::Expr::type(), impala::TYPE_SMALLINT, and value_.

impala::Literal::Literal	(	ColumnType	type,
		int32_t	v
	)

Definition at line 142 of file literal.cc.

References impala::ExprValue::int_val, impala::ColumnType::type, impala::Expr::type(), impala::TYPE_INT, and value_.

impala::Literal::Literal	(	ColumnType	type,
		int64_t	v
	)

Definition at line 148 of file literal.cc.

References impala::ExprValue::bigint_val, impala::ColumnType::type, impala::Expr::type(), impala::TYPE_BIGINT, and value_.

impala::Literal::Literal	(	ColumnType	type,
		float	v
	)

Definition at line 154 of file literal.cc.

References impala::ExprValue::float_val, impala::ColumnType::type, impala::Expr::type(), impala::TYPE_FLOAT, and value_.

impala::Literal::Literal	(	ColumnType	type,
		double	v
	)

Definition at line 160 of file literal.cc.

References impala::ColumnType::DebugString(), impala::ExprValue::double_val, impala::ExprValue::timestamp_val, impala::ColumnType::type, impala::TYPE_DOUBLE, impala::TYPE_TIMESTAMP, and value_.

impala::Literal::Literal	(	ColumnType	type,
		const std::string &	v
	)

impala::Literal::Literal	(	ColumnType	type,
		const StringValue &	v
	)

Definition at line 177 of file literal.cc.

References impala::ColumnType::type, impala::Expr::type(), impala::TYPE_CHAR, and impala::TYPE_STRING.

impala::Literal::Literal ( const TExprNode &  node )

protected

Definition at line 31 of file literal.cc.

References impala::ExprValue::bigint_val, impala::ExprValue::bool_val, impala::ColumnType::DebugString(), impala::ExprValue::decimal16_val, impala::ExprValue::decimal4_val, impala::ExprValue::decimal8_val, impala::DecimalUtil::DecodeFromFixedLenByteArray(), impala::ExprValue::double_val, impala::ExprValue::float_val, impala::ExprValue::int_val, impala::StringValue::len, impala::ColumnType::len, impala::ExprValue::smallint_val, impala::ExprValue::string_val, impala::ExprValue::tinyint_val, impala::ColumnType::type, impala::Expr::type(), impala::Expr::type_, impala::TYPE_BIGINT, impala::TYPE_BOOLEAN, impala::TYPE_CHAR, impala::TYPE_DECIMAL, impala::TYPE_DOUBLE, impala::TYPE_FLOAT, impala::TYPE_INT, impala::TYPE_SMALLINT, impala::TYPE_STRING, impala::TYPE_TINYINT, impala::TYPE_VARCHAR, impala::TypeToString(), and value_.

Member Function Documentation

void impala::Expr::AddChild ( Expr *  expr )

inlineinherited

Definition at line 141 of file expr.h.

Referenced by impala::Expr::CreateTreeFromThrift().

const std::vector<Expr*>& impala::Expr::children ( ) const

inlineinherited

Definition at line 148 of file expr.h.

Referenced by impala::CaseExpr::GetChildVal(), and impala::CaseExpr::GetCodegendComputeFn().

Status Expr::Clone ( const std::vector< ExprContext * > &  ctxs, RuntimeState *  state, std::vector< ExprContext * > *  new_ctxs  )

staticinherited

Clones each ExprContext for multiple expr trees. 'new_ctxs' should be an empty vector, and a clone of each context in 'ctxs' will be added to it. The new ExprContexts are created in state->obj_pool().

Definition at line 374 of file expr.cc.

References impala::Status::OK, and RETURN_IF_ERROR.

Referenced by impala::HdfsScanNode::GetConjunctCtxs(), and impala::SortExecExprs::Open().

static void impala::Expr::Close ( const std::vector< ExprContext * > &  ctxs, RuntimeState *  state  )

staticinherited

Convenience function for closing multiple expr trees.

Referenced by impala::UnionNode::Close(), impala::SortExecExprs::Close(), impala::CaseExpr::Close(), impala::HashJoinNode::Close(), impala::AggregationNode::Close(), impala::ScalarFnCall::Close(), impala::ExprContext::Close(), impala::HiveUdfCall::Close(), impala::PartitionedHashJoinNode::Close(), impala::DataStreamSender::Close(), impala::PartitionedAggregationNode::Close(), impala::AggFnEvaluator::Close(), impala::HdfsScanner::Close(), impala::ExecNode::Close(), impala::HdfsScanNode::Close(), impala::HdfsTableSink::Close(), impala::HdfsPartitionDescriptor::CloseExprs(), impala::ImpalaServer::QueryExecState::Done(), impala::OldHashTableTest::TearDown(), and impala::HashTableTest::TearDown().

void Expr::Close ( RuntimeState *  state, ExprContext *  context, FunctionContext::FunctionStateScope  scope = FunctionContext::FRAGMENT_LOCAL  )

protectedvirtualinherited

Subclasses overriding this function should call Expr::Close().

If scope if FRAGMENT_LOCAL, both fragment- and thread-local state should be torn down. Otherwise, if scope is THREAD_LOCAL, only thread-local state should be torn down.

Reimplemented in impala::HiveUdfCall, impala::ScalarFnCall, and impala::CaseExpr.

Definition at line 114 of file expr.cc.

References impala::Expr::cache_entry_, impala::Expr::children_, impala::LibCache::DecrementUseCount(), and impala::LibCache::instance().

static int impala::Expr::ComputeResultsLayout ( const std::vector< Expr * > &  exprs, std::vector< int > *  offsets, int *  var_result_begin  )

staticinherited

Computes a memory efficient layout for storing the results of evaluating 'exprs' Returns the number of bytes necessary to store all the results and offsets where the result for each expr should be stored. Variable length types are guaranteed to be at the end and 'var_result_begin' will be set the beginning byte offset where variable length results begin. 'var_result_begin' will be set to -1 if there are no variable len types.

Referenced by impala::HashTableCtx::HashTableCtx(), and impala::OldHashTable::OldHashTable().

static int impala::Expr::ComputeResultsLayout ( const std::vector< ExprContext * > &  ctxs, std::vector< int > *  offsets, int *  var_result_begin  )

staticinherited

Status Expr::CreateExprTree ( ObjectPool *  pool, const TExpr &  texpr, ExprContext **  ctx  )

staticinherited

Create expression tree from the list of nodes contained in texpr within 'pool'. Returns the root of expression tree in 'expr' and the corresponding ExprContext in 'ctx'.

Definition at line 129 of file expr.cc.

References impala::Expr::CreateTreeFromThrift(), impala::Status::GetDetail(), impala::Status::OK, and impala::Status::ok().

Referenced by impala::Expr::CreateExprTrees(), impala::HdfsPartitionDescriptor::HdfsPartitionDescriptor(), impala::HashJoinNode::Init(), impala::AnalyticEvalNode::Init(), impala::PartitionedHashJoinNode::Init(), and Java_com_cloudera_impala_service_FeSupport_NativeEvalConstExprs().

Status Expr::CreateExprTrees ( ObjectPool *  pool, const std::vector< TExpr > &  texprs, std::vector< ExprContext * > *  ctxs  )

staticinherited

Creates vector of ExprContexts containing exprs from the given vector of TExprs within 'pool'. Returns an error if any of the individual conversions caused an error, otherwise OK.

Definition at line 149 of file expr.cc.

References impala::Expr::CreateExprTree(), impala::Status::OK, and RETURN_IF_ERROR.

Referenced by impala::DataStreamSender::DataStreamSender(), impala::UnionNode::Init(), impala::HashJoinNode::Init(), impala::AggregationNode::Init(), impala::ExecNode::Init(), impala::PartitionedHashJoinNode::Init(), impala::PartitionedAggregationNode::Init(), impala::HdfsScanNode::Prepare(), and impala::HdfsTableSink::Prepare().

Function * Expr::CreateIrFunctionPrototype ( LlvmCodeGen *  codegen, const std::string &  name, llvm::Value *(*)  args[2]  )

protectedinherited

Helper function to create an empty Function* with the appropriate signature to be returned by GetCodegendComputeFn(). 'name' is the name of the returned Function*. The arguments to the function are returned in 'args'.

Definition at line 456 of file expr.cc.

References impala::LlvmCodeGen::FnPrototype::AddArgument(), impala::LlvmCodeGen::FnPrototype::GeneratePrototype(), impala::CodegenAnyVal::GetLoweredType(), impala::LlvmCodeGen::GetPtrType(), impala::TupleRow::LLVM_CLASS_NAME, impala::ExprContext::LLVM_CLASS_NAME, and impala::Expr::type().

Referenced by impala::CaseExpr::GetCodegendComputeFn(), impala::SlotRef::GetCodegendComputeFn(), GetCodegendComputeFn(), impala::ScalarFnCall::GetCodegendComputeFn(), and impala::Expr::GetCodegendComputeFnWrapper().

Literal * impala::Literal::CreateLiteral ( const ColumnType &  type, const std::string &  str  )

static

Test function that parses 'str' according to 'type'. The caller owns the returned Literal.

Definition at line 190 of file literal.cc.

References impala::ColumnType::DebugString(), Literal(), impala::ColumnType::type, impala::TYPE_BIGINT, impala::TYPE_BOOLEAN, impala::TYPE_CHAR, impala::TYPE_DOUBLE, impala::TYPE_FLOAT, impala::TYPE_INT, impala::TYPE_SMALLINT, impala::TYPE_STRING, impala::TYPE_TIMESTAMP, impala::TYPE_TINYINT, and impala::TYPE_VARCHAR.

static Expr* impala::Expr::CreateLiteral ( ObjectPool *  pool, const ColumnType &  type, void *  data  )

staticinherited

Create a new literal expr of 'type' with initial 'data'. data should match the ColumnType (i.e. type == TYPE_INT, data is a int*) The new Expr will be allocated from the pool.

static Expr* impala::Expr::CreateLiteral ( ObjectPool *  pool, const ColumnType &  type, const std::string &    )

staticinherited

Create a new literal expr of 'type' by parsing the string. NULL will be returned if the string and type are not compatible. The new Expr will be allocated from the pool.

string impala::Literal::DebugString ( ) const

protectedvirtual

Reimplemented from impala::Expr.

Definition at line 300 of file literal.cc.

References impala::ExprValue::bigint_val, impala::ExprValue::bool_val, impala::Expr::DebugString(), impala::ColumnType::DebugString(), impala::ExprValue::decimal16_val, impala::ExprValue::decimal4_val, impala::ExprValue::decimal8_val, impala::ExprValue::double_val, impala::ExprValue::float_val, impala::ExprValue::int_val, impala::ExprValue::smallint_val, impala::ExprValue::string_val, impala::ExprValue::tinyint_val, impala::DecimalValue< T >::ToString(), impala::ColumnType::type, impala::Expr::type(), impala::Expr::type_, impala::TYPE_BIGINT, impala::TYPE_BOOLEAN, impala::TYPE_DECIMAL, impala::TYPE_DOUBLE, impala::TYPE_FLOAT, impala::TYPE_INT, impala::TYPE_SMALLINT, impala::TYPE_STRING, impala::TYPE_TINYINT, and value_.

static std::string impala::Expr::DebugString ( const std::vector< Expr * > &  exprs )

staticinherited

static std::string impala::Expr::DebugString ( const std::vector< ExprContext * > &  ctxs )

staticinherited

std::string impala::Expr::DebugString ( const std::string &  expr_name ) const

inlineprotectedinherited

Simple debug string that provides no expr subclass-specific information.

Definition at line 332 of file expr.h.

References impala_udf::DebugString().

BigIntVal impala::Literal::GetBigIntVal ( ExprContext *  context, TupleRow *  row  )

virtual

Reimplemented from impala::Expr.

Definition at line 262 of file literal.cc.

References impala::ExprValue::bigint_val, impala::ColumnType::type, impala::Expr::type_, impala::TYPE_BIGINT, and value_.

BooleanVal impala::Literal::GetBooleanVal ( ExprContext *  context, TupleRow *  row  )

virtual

Virtual compute functions for each *Val type. Each Expr subclass should implement the functions for the return type(s) it supports. For example, a boolean function will only implement GetBooleanVal(). Some Exprs, like Literal, have many possible return types and will implement multiple Get*Val() functions.

Reimplemented from impala::Expr.

Definition at line 242 of file literal.cc.

References impala::ExprValue::bool_val, impala::ColumnType::type, impala::Expr::type_, impala::TYPE_BOOLEAN, and value_.

Expr* impala::Expr::GetChild ( int  i ) const

inlineinherited

Definition at line 142 of file expr.h.

Referenced by impala::HiveUdfCall::Evaluate(), and impala::HiveUdfCall::Prepare().

Status impala::Literal::GetCodegendComputeFn ( RuntimeState *  state, llvm::Function **  fn  )

virtual

Returns an llvm::Function* with signature: <subclass of="" anyval>=""> ComputeFn(ExprContext* context, TupleRow* row) The function should evaluate this expr over 'row' and return the result as the appropriate type of AnyVal.

Implements impala::Expr.

Definition at line 356 of file literal.cc.

References impala::ExprValue::bigint_val, impala::ExprValue::bool_val, impala::LlvmCodeGen::CastPtrToLlvmPtr(), impala::LlvmCodeGen::context(), impala::Expr::CreateIrFunctionPrototype(), impala::ColumnType::DebugString(), impala::ExprValue::decimal16_val, impala::ExprValue::decimal4_val, impala::ExprValue::decimal8_val, impala::ExprValue::double_val, impala::LlvmCodeGen::FinalizeFunction(), impala::ExprValue::float_val, impala::ColumnType::GetByteSize(), impala::RuntimeState::GetCodegen(), impala::CodegenAnyVal::GetNonNullVal(), impala::Expr::GetNumChildren(), impala::ExprValue::int_val, impala::Expr::ir_compute_fn_, impala::StringValue::len, impala::Status::OK, impala::StringValue::ptr, impala::LlvmCodeGen::ptr_type(), RETURN_IF_ERROR, impala::CodegenAnyVal::SetLen(), impala::CodegenAnyVal::SetPtr(), impala::CodegenAnyVal::SetVal(), impala::ExprValue::smallint_val, impala::ExprValue::string_val, impala::ExprValue::tinyint_val, impala::ColumnType::type, impala::Expr::type(), impala::Expr::type_, impala::TYPE_BIGINT, impala::TYPE_BOOLEAN, impala::TYPE_CHAR, impala::TYPE_DECIMAL, impala::TYPE_DOUBLE, impala::TYPE_FLOAT, impala::TYPE_INT, impala::TYPE_SMALLINT, impala::TYPE_STRING, impala::TYPE_TINYINT, impala::TYPE_VARCHAR, impala::CodegenAnyVal::value(), impala::DecimalValue< T >::value(), and value_.

Status Expr::GetCodegendComputeFnWrapper ( RuntimeState *  state, llvm::Function **  fn  )

protectedinherited

Generates an IR compute function that calls the appropriate interpreted Get*Val() compute function. This is useful for builtins that can't be implemented with the UDF interface (e.g. functions that need short-circuiting) and that don't have custom codegen functions that use the IRBuilder. It doesn't provide any performance benefit over the interpreted path. TODO: this should be replaced with fancier xcompiling infrastructure

Definition at line 546 of file expr.cc.

References impala::LlvmCodeGen::CastPtrToLlvmPtr(), impala::LlvmCodeGen::context(), impala::CodegenAnyVal::CreateCall(), impala::Expr::CreateIrFunctionPrototype(), impala::LlvmCodeGen::FinalizeFunction(), impala::RuntimeState::GetCodegen(), impala::LlvmCodeGen::GetPtrType(), impala::Expr::GetStaticGetValWrapper(), impala::Expr::ir_compute_fn_, impala::Expr::LLVM_CLASS_NAME, impala::Status::OK, RETURN_IF_ERROR, and impala::Expr::type().

Referenced by impala::TupleIsNullPredicate::GetCodegendComputeFn(), and impala::HiveUdfCall::GetCodegendComputeFn().

AnyVal * Expr::GetConstVal ( ExprContext *  context )

virtualinherited

If this expr is constant, evaluates the expr with no input row argument and returns the output. Returns NULL if the argument is not constant. The returned AnyVal* is owned by this expr. This should only be called after Open() has been called on this expr.

Definition at line 491 of file expr.cc.

References impala::Expr::constant_val_, impala::Expr::GetBigIntVal(), impala::Expr::GetBooleanVal(), impala::Expr::GetDecimalVal(), impala::Expr::GetDoubleVal(), impala::Expr::GetFloatVal(), impala::Expr::GetIntVal(), impala::Expr::GetSmallIntVal(), impala::Expr::GetStringVal(), impala::Expr::GetTimestampVal(), impala::Expr::GetTinyIntVal(), impala::Expr::IsConstant(), impala::ExprContext::opened_, impala::ColumnType::type, impala::Expr::type(), impala::Expr::type_, impala::TYPE_BIGINT, impala::TYPE_BOOLEAN, impala::TYPE_CHAR, impala::TYPE_DECIMAL, impala::TYPE_DOUBLE, impala::TYPE_FLOAT, impala::TYPE_INT, impala::TYPE_SMALLINT, impala::TYPE_STRING, impala::TYPE_TIMESTAMP, impala::TYPE_TINYINT, and impala::TYPE_VARCHAR.

Referenced by impala::ScalarFnCall::Open().

DecimalVal impala::Literal::GetDecimalVal ( ExprContext *  context, TupleRow *  row  )

virtual

Reimplemented from impala::Expr.

Definition at line 284 of file literal.cc.

References impala::ColumnType::DebugString(), impala::ExprValue::decimal16_val, impala::ExprValue::decimal4_val, impala::ExprValue::decimal8_val, impala::ColumnType::type, impala::Expr::type(), impala::Expr::type_, impala::TYPE_DECIMAL, impala::DecimalValue< T >::value(), and value_.

DoubleVal impala::Literal::GetDoubleVal ( ExprContext *  context, TupleRow *  row  )

virtual

Reimplemented from impala::Expr.

Definition at line 272 of file literal.cc.

References impala::ExprValue::double_val, impala::ColumnType::type, impala::Expr::type_, impala::TYPE_DOUBLE, and value_.

FloatVal impala::Literal::GetFloatVal ( ExprContext *  context, TupleRow *  row  )

virtual

Reimplemented from impala::Expr.

Definition at line 267 of file literal.cc.

References impala::ExprValue::float_val, impala::ColumnType::type, impala::Expr::type_, impala::TYPE_FLOAT, and value_.

IntVal impala::Literal::GetIntVal ( ExprContext *  context, TupleRow *  row  )

virtual

Reimplemented from impala::Expr.

Definition at line 257 of file literal.cc.

References impala::ExprValue::int_val, impala::ColumnType::type, impala::Expr::type_, impala::TYPE_INT, and value_.

int impala::Expr::GetNumChildren ( ) const

inlineinherited

Definition at line 143 of file expr.h.

Referenced by impala::HiveUdfCall::Evaluate(), impala::CaseExpr::GetCodegendComputeFn(), impala::SlotRef::GetCodegendComputeFn(), GetCodegendComputeFn(), impala::ScalarFnCall::GetCodegendComputeFn(), impala::HiveUdfCall::Open(), impala::ScalarFnCall::Prepare(), and impala::HiveUdfCall::Prepare().

int Expr::GetSlotIds ( std::vector< SlotId > *  slot_ids ) const

virtualinherited

Returns the slots that are referenced by this expr tree in 'slot_ids'. Returns the number of slots added to the vector

Reimplemented in impala::SlotRef.

Definition at line 418 of file expr.cc.

References impala::Expr::children_.

SmallIntVal impala::Literal::GetSmallIntVal ( ExprContext *  context, TupleRow *  row  )

virtual

Reimplemented from impala::Expr.

Definition at line 252 of file literal.cc.

References impala::ExprValue::smallint_val, impala::ColumnType::type, impala::Expr::type_, impala::TYPE_SMALLINT, and value_.

Function * Expr::GetStaticGetValWrapper ( ColumnType  type, LlvmCodeGen *  codegen  )

protectedinherited

Returns the IR version of the static Get*Val() wrapper function corresponding to 'type'. This is used for calling interpreted Get*Val() functions from codegen'd functions (e.g. in ScalarFnCall() when codegen is disabled).

Definition at line 426 of file expr.cc.

References impala::ColumnType::DebugString(), impala::LlvmCodeGen::GetFunction(), impala::ColumnType::type, impala::TYPE_BIGINT, impala::TYPE_BOOLEAN, impala::TYPE_CHAR, impala::TYPE_DECIMAL, impala::TYPE_DOUBLE, impala::TYPE_FLOAT, impala::TYPE_INT, impala::TYPE_SMALLINT, impala::TYPE_STRING, impala::TYPE_TIMESTAMP, impala::TYPE_TINYINT, and impala::TYPE_VARCHAR.

Referenced by impala::ScalarFnCall::GetCodegendComputeFn(), and impala::Expr::GetCodegendComputeFnWrapper().

StringVal impala::Literal::GetStringVal ( ExprContext *  context, TupleRow *  row  )

virtual

Reimplemented from impala::Expr.

Definition at line 277 of file literal.cc.

References impala::ColumnType::IsStringType(), impala::ExprValue::string_val, impala::StringValue::ToStringVal(), impala::Expr::type_, and value_.

TimestampVal Expr::GetTimestampVal ( ExprContext *  context, TupleRow *  row  )

virtualinherited

Reimplemented in impala::CoalesceExpr, impala::IfExpr, impala::NullIfExpr, impala::HiveUdfCall, impala::ScalarFnCall, impala::IsNullExpr, impala::SlotRef, impala::CaseExpr, and impala::NullLiteral.

Definition at line 605 of file expr.cc.

References impala::Expr::DebugString().

Referenced by impala::Expr::GetConstVal(), impala::ExprContext::GetTimestampVal(), impala::Expr::GetTimestampVal(), and impala::ExprContext::GetValue().

TinyIntVal impala::Literal::GetTinyIntVal ( ExprContext *  context, TupleRow *  row  )

virtual

Reimplemented from impala::Expr.

Definition at line 247 of file literal.cc.

References impala::ExprValue::tinyint_val, impala::ColumnType::type, impala::Expr::type_, impala::TYPE_TINYINT, and value_.

void Expr::InitBuiltinsDummy ( )

staticinherited

The builtin functions are not called from anywhere in the code and the symbols are therefore not included in the binary. We call these functions by using dlsym. The compiler must think this function is callable to not strip these symbols.

Definition at line 470 of file expr.cc.

References impala::Operators::Add_IntVal_IntVal(), impala::CastFunctions::CastToBooleanVal(), impala::DecimalOperators::CastToDecimalVal(), impala::InPredicate::InIterate(), impala::AggregateFunctions::InitNull(), impala::IsNullPredicate::IsNull(), impala::StringFunctions::Length(), impala::LikePredicate::Like(), impala::CompoundPredicate::Not(), impala::ConditionalFunctions::NullIfZero(), impala::UdfBuiltins::Pi(), impala::MathFunctions::Pi(), impala::UtilityFunctions::Pid(), impala::DecimalFunctions::Precision(), and impala::TimestampFunctions::Year().

bool impala::Expr::is_slotref ( ) const

inlineinherited

Definition at line 146 of file expr.h.

bool Expr::IsConstant ( ) const

virtualinherited

Returns true if GetValue(NULL) can be called on this expr and always returns the same result (e.g., exprs that don't contain slotrefs). The default implementation returns true if all children are constant.

Reimplemented in impala::ScalarFnCall, impala::TupleIsNullPredicate, and impala::SlotRef.

Definition at line 411 of file expr.cc.

References impala::Expr::children_.

Referenced by impala::Expr::GetConstVal(), and impala::ScalarFnCall::IsConstant().

static Status impala::Expr::Open ( const std::vector< ExprContext * > &  ctxs, RuntimeState *  state  )

staticinherited

Convenience function for opening multiple expr trees.

Referenced by impala::ExprContext::Clone(), impala::HashJoinNode::ConstructBuildSide(), impala::PartitionedHashJoinNode::ConstructBuildSide(), impala::UnionNode::Open(), impala::SortExecExprs::Open(), impala::ExprContext::Open(), impala::CaseExpr::Open(), impala::AggregationNode::Open(), impala::ScalarFnCall::Open(), impala::HiveUdfCall::Open(), impala::DataStreamSender::Open(), impala::ExecNode::Open(), impala::PartitionedAggregationNode::Open(), impala::AggFnEvaluator::Open(), impala::HdfsScanNode::Open(), impala::HdfsTableSink::Open(), impala::Expr::Open(), impala::HdfsPartitionDescriptor::OpenExprs(), impala::OldHashTableTest::SetUp(), impala::HashTableTest::SetUp(), and impala::ImpalaServer::QueryExecState::WaitInternal().

Status Expr::Open ( RuntimeState *  state, ExprContext *  context, FunctionContext::FunctionStateScope  scope = FunctionContext::FRAGMENT_LOCAL  )

protectedvirtualinherited

Initializes 'context' for execution. If scope if FRAGMENT_LOCAL, both fragment- and thread-local state should be initialized. Otherwise, if scope is THREAD_LOCAL, only thread-local state should be initialized. Subclasses overriding this function should call Expr::Open() to recursively call Open() on the expr tree.

Reimplemented in impala::HiveUdfCall, impala::ScalarFnCall, and impala::CaseExpr.

Definition at line 366 of file expr.cc.

References impala::Expr::children_, impala::Status::OK, impala::Expr::Open(), and RETURN_IF_ERROR.

int impala::Expr::output_scale ( ) const

inlineinherited

Get the number of digits after the decimal that should be displayed for this value. Returns -1 if no scale has been specified (currently the scale is only set for doubles set by RoundUpTo). GetValue() must have already been called. TODO: is this still necessary?

Definition at line 139 of file expr.h.

static Status impala::Expr::Prepare ( const std::vector< ExprContext * > &  ctxs, RuntimeState *  state, const RowDescriptor &  row_desc, MemTracker *  tracker  )

staticinherited

Convenience function for preparing multiple expr trees. Allocations from 'ctxs' will be counted against 'tracker'.

Referenced by impala::TupleIsNullPredicate::Prepare(), impala::UnionNode::Prepare(), impala::SortExecExprs::Prepare(), impala::ExprContext::Prepare(), impala::CaseExpr::Prepare(), impala::HashJoinNode::Prepare(), impala::AggregationNode::Prepare(), impala::ScalarFnCall::Prepare(), impala::HiveUdfCall::Prepare(), impala::PartitionedHashJoinNode::Prepare(), impala::DataStreamSender::Prepare(), impala::ExecNode::Prepare(), impala::AggFnEvaluator::Prepare(), impala::PartitionedAggregationNode::Prepare(), impala::HdfsScanNode::Prepare(), impala::Expr::Prepare(), impala::HdfsTableSink::PrepareExprs(), impala::HdfsPartitionDescriptor::PrepareExprs(), impala::HashTableTest::SetUp(), and impala::OldHashTableTest::SetUp().

Status Expr::Prepare ( RuntimeState *  state, const RowDescriptor &  row_desc, ExprContext *  context  )

protectedvirtualinherited

Initializes this expr instance for execution. This does not include initializing state in the ExprContext; 'context' should only be used to register a FunctionContext via RegisterFunctionContext(). Any IR functions must be generated here. Subclasses overriding this function should call Expr::Prepare() to recursively call Prepare() on the expr tree.

Reimplemented in impala::HiveUdfCall, impala::ScalarFnCall, impala::CaseExpr, impala::TupleIsNullPredicate, and impala::SlotRef.

Definition at line 350 of file expr.cc.

References impala::Expr::children_, impala::INVALID_TYPE, impala::Status::OK, impala::Expr::Prepare(), RETURN_IF_ERROR, impala::ColumnType::type, and impala::Expr::type_.

FunctionContext * Expr::RegisterFunctionContext ( ExprContext *  ctx, RuntimeState *  state, int  varargs_buffer_size = 0  )

protectedinherited

Helper function that calls ctx->Register(), sets context_index_, and returns the registered FunctionContext.

Definition at line 80 of file expr.cc.

References impala::AnyValUtil::ColumnTypeToTypeDesc(), impala::ExprContext::fn_context(), and impala::ExprContext::Register().

Referenced by impala::CaseExpr::Prepare(), and impala::HiveUdfCall::Prepare().

const ColumnType& impala::Expr::type ( ) const

inlineinherited

Definition at line 145 of file expr.h.

Referenced by impala::CaseExpr::AnyValEq(), impala::HdfsParquetTableWriter::BoolColumnWriter::BoolColumnWriter(), impala::AggregationNode::CodegenUpdateSlot(), impala::PartitionedAggregationNode::CodegenUpdateSlot(), impala::HdfsParquetTableWriter::ColumnWriter< T >::ColumnWriter(), impala::Expr::CreateIrFunctionPrototype(), DebugString(), impala::HiveUdfCall::Evaluate(), impala::ScalarFnCall::EvaluateChildren(), impala::CaseExpr::GetChildVal(), impala::CaseExpr::GetCodegendComputeFn(), impala::SlotRef::GetCodegendComputeFn(), GetCodegendComputeFn(), impala::ScalarFnCall::GetCodegendComputeFn(), impala::Expr::GetCodegendComputeFnWrapper(), impala::Expr::GetConstVal(), GetDecimalVal(), impala::ScalarFnCall::GetUdf(), Literal(), impala::ScalarFnCall::Open(), impala::HiveUdfCall::Open(), impala::ScalarFnCall::Prepare(), impala::HiveUdfCall::Prepare(), and impala::DataStreamSender::Send().

Friends And Related Function Documentation

friend class Expr

friend

Definition at line 58 of file literal.h.

Member Data Documentation

LibCache::LibCacheEntry* impala::Expr::cache_entry_

protectedinherited

Cache entry for the library implementing this function.

Definition at line 281 of file expr.h.

Referenced by impala::Expr::Close(), impala::ScalarFnCall::GetFunction(), impala::ScalarFnCall::GetUdf(), impala::ScalarFnCall::Prepare(), and impala::Expr::~Expr().

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

protectedinherited

Definition at line 290 of file expr.h.

Referenced by impala::Expr::Close(), impala::Expr::DebugString(), impala::ScalarFnCall::EvaluateChildren(), impala::ScalarFnCall::GetCodegendComputeFn(), impala::Expr::GetSlotIds(), impala::ScalarFnCall::GetUdf(), impala::ScalarFnCall::InterpretEval(), impala::Expr::IsConstant(), impala::CaseExpr::Open(), impala::ScalarFnCall::Open(), impala::Expr::Open(), impala::SlotRef::Prepare(), impala::TupleIsNullPredicate::Prepare(), impala::ScalarFnCall::Prepare(), and impala::Expr::Prepare().

boost::scoped_ptr<AnyVal> impala::Expr::constant_val_

protectedinherited

If this expr is constant, this will store and cache the value generated by GetConstVal().

Definition at line 303 of file expr.h.

Referenced by impala::Expr::GetConstVal().

int impala::Expr::context_index_

protectedinherited

Index to pass to ExprContext::fn_context() to retrieve this expr's FunctionContext. Set in RegisterFunctionContext(). -1 if this expr does not need a FunctionContext and doesn't call RegisterFunctionContext().

Definition at line 296 of file expr.h.

Referenced by impala::CaseExpr::Close(), impala::ScalarFnCall::Close(), impala::HiveUdfCall::Close(), impala::HiveUdfCall::Evaluate(), impala::ScalarFnCall::EvaluateChildren(), impala::ScalarFnCall::GetCodegendComputeFn(), impala::ScalarFnCall::InterpretEval(), impala::CaseExpr::Open(), impala::ScalarFnCall::Open(), impala::HiveUdfCall::Open(), and impala::ScalarFnCall::Prepare().

TFunction impala::Expr::fn_

protectedinherited

Function description.

Definition at line 284 of file expr.h.

Referenced by impala::ScalarFnCall::DebugString(), impala::HiveUdfCall::DebugString(), impala::HiveUdfCall::Evaluate(), impala::Expr::Expr(), impala::ScalarFnCall::GetFunction(), impala::ScalarFnCall::GetUdf(), impala::ScalarFnCall::IsConstant(), impala::ScalarFnCall::Open(), impala::HiveUdfCall::Open(), impala::ScalarFnCall::Prepare(), impala::HiveUdfCall::Prepare(), and impala::ScalarFnCall::ScalarFnCall().

llvm::Function* impala::Expr::ir_compute_fn_

protectedinherited

Cached codegened compute function. Exprs should set this in GetCodegendComputeFn().

Definition at line 299 of file expr.h.

Referenced by impala::CaseExpr::GetCodegendComputeFn(), impala::SlotRef::GetCodegendComputeFn(), GetCodegendComputeFn(), impala::ScalarFnCall::GetCodegendComputeFn(), and impala::Expr::GetCodegendComputeFnWrapper().

const bool impala::Expr::is_slotref_

protectedinherited

recognize if this node is a slotref in order to speed up GetValue()

Definition at line 287 of file expr.h.

const char * Expr::LLVM_CLASS_NAME = "class.impala::Expr"

staticinherited

Definition at line 232 of file expr.h.

Referenced by impala::ScalarFnCall::GetCodegendComputeFn(), and impala::Expr::GetCodegendComputeFnWrapper().

int impala::Expr::output_scale_

protectedinherited

Definition at line 291 of file expr.h.

Referenced by impala::ExprContext::GetValue(), and impala::ScalarFnCall::Open().

const ColumnType impala::Expr::type_

protectedinherited

analysis is done, types are fixed at this point

Definition at line 289 of file expr.h.

Referenced by DebugString(), impala::Expr::DebugString(), impala::SlotRef::GetBigIntVal(), GetBigIntVal(), impala::ScalarFnCall::GetBigIntVal(), impala::HiveUdfCall::GetBigIntVal(), impala::SlotRef::GetBooleanVal(), GetBooleanVal(), impala::HiveUdfCall::GetBooleanVal(), impala::ScalarFnCall::GetBooleanVal(), impala::SlotRef::GetCodegendComputeFn(), GetCodegendComputeFn(), impala::Expr::GetConstVal(), impala::SlotRef::GetDecimalVal(), GetDecimalVal(), impala::ScalarFnCall::GetDecimalVal(), impala::HiveUdfCall::GetDecimalVal(), impala::SlotRef::GetDoubleVal(), GetDoubleVal(), impala::ScalarFnCall::GetDoubleVal(), impala::HiveUdfCall::GetDoubleVal(), impala::SlotRef::GetFloatVal(), GetFloatVal(), impala::ScalarFnCall::GetFloatVal(), impala::HiveUdfCall::GetFloatVal(), impala::SlotRef::GetIntVal(), GetIntVal(), impala::ScalarFnCall::GetIntVal(), impala::HiveUdfCall::GetIntVal(), impala::SlotRef::GetSmallIntVal(), GetSmallIntVal(), impala::ScalarFnCall::GetSmallIntVal(), impala::HiveUdfCall::GetSmallIntVal(), impala::SlotRef::GetStringVal(), GetStringVal(), impala::HiveUdfCall::GetStringVal(), impala::ScalarFnCall::GetStringVal(), impala::SlotRef::GetTimestampVal(), impala::ScalarFnCall::GetTimestampVal(), impala::HiveUdfCall::GetTimestampVal(), impala::SlotRef::GetTinyIntVal(), GetTinyIntVal(), impala::HiveUdfCall::GetTinyIntVal(), impala::ScalarFnCall::GetTinyIntVal(), impala::ExprContext::GetValue(), Literal(), impala::ScalarFnCall::Open(), impala::HiveUdfCall::Open(), impala::ScalarFnCall::Prepare(), and impala::Expr::Prepare().

ExprValue impala::Literal::value_

private

Definition at line 65 of file literal.h.

Referenced by DebugString(), GetBigIntVal(), GetBooleanVal(), GetCodegendComputeFn(), GetDecimalVal(), GetDoubleVal(), GetFloatVal(), GetIntVal(), GetSmallIntVal(), GetStringVal(), GetTinyIntVal(), and Literal().

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

• be/src/exprs/literal.h
• be/src/exprs/literal.cc