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impala::SlotRef Class Reference

Reference to a single slot of a tuple. More...

#include <slot-ref.h>

Inheritance diagram for impala::SlotRef:
Collaboration diagram for impala::SlotRef:

Public Member Functions

 SlotRef (const TExprNode &node)
 
 SlotRef (const SlotDescriptor *desc)
 
 SlotRef (const SlotDescriptor *desc, const ColumnType &type)
 
 SlotRef (const ColumnType &type, int offset)
 Used for testing. GetValue will return tuple + offset interpreted as 'type'. More...
 
virtual Status Prepare (RuntimeState *state, const RowDescriptor &row_desc, ExprContext *context)
 
virtual std::string DebugString () const
 
virtual bool IsConstant () const
 
virtual int GetSlotIds (std::vector< SlotId > *slot_ids) const
 
const SlotId & slot_id () const
 
virtual Status GetCodegendComputeFn (RuntimeState *state, llvm::Function **fn)
 
virtual impala_udf::BooleanVal GetBooleanVal (ExprContext *context, TupleRow *)
 
virtual impala_udf::TinyIntVal GetTinyIntVal (ExprContext *context, TupleRow *)
 
virtual impala_udf::SmallIntVal GetSmallIntVal (ExprContext *context, TupleRow *)
 
virtual impala_udf::IntVal GetIntVal (ExprContext *context, TupleRow *)
 
virtual impala_udf::BigIntVal GetBigIntVal (ExprContext *context, TupleRow *)
 
virtual impala_udf::FloatVal GetFloatVal (ExprContext *context, TupleRow *)
 
virtual impala_udf::DoubleVal GetDoubleVal (ExprContext *context, TupleRow *)
 
virtual impala_udf::StringVal GetStringVal (ExprContext *context, TupleRow *)
 
virtual impala_udf::TimestampVal GetTimestampVal (ExprContext *context, TupleRow *)
 
virtual impala_udf::DecimalVal GetDecimalVal (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 AnyVal * GetConstVal (ExprContext *context)
 

Static Public Member Functions

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

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

int tuple_idx_
 
int slot_offset_
 
NullIndicatorOffset null_indicator_offset_
 
const SlotId slot_id_
 
bool tuple_is_nullable_
 
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_
 

Detailed Description

Reference to a single slot of a tuple.

Definition at line 23 of file slot-ref.h.

Constructor & Destructor Documentation

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

Definition at line 31 of file slot-ref.cc.

impala::SlotRef::SlotRef ( const SlotDescriptor *  desc)

Definition at line 39 of file slot-ref.cc.

impala::SlotRef::SlotRef ( const SlotDescriptor *  desc,
const ColumnType &  type 
)

TODO: this is a hack to allow aggregation nodes to work around NULL slot descriptors. Ideally the FE would dictate the type of the intermediate SlotRefs.

Definition at line 47 of file slot-ref.cc.

impala::SlotRef::SlotRef ( const ColumnType &  type,
int  offset 
)

Used for testing. GetValue will return tuple + offset interpreted as 'type'.

Definition at line 55 of file slot-ref.cc.

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(), GetCodegendComputeFn(), impala::Literal::GetCodegendComputeFn(), impala::ScalarFnCall::GetCodegendComputeFn(), and impala::Expr::GetCodegendComputeFnWrapper().

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::SlotRef::DebugString ( ) const
virtual

Reimplemented from impala::Expr.

Definition at line 104 of file slot-ref.cc.

References impala::Expr::DebugString(), null_indicator_offset_, slot_id_, slot_offset_, tuple_idx_, and tuple_is_nullable_.

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::SlotRef::GetBigIntVal ( ExprContext *  context,
TupleRow *  row 
)
virtual

Reimplemented from impala::Expr.

Definition at line 399 of file slot-ref.cc.

References impala::Tuple::GetSlot(), impala::TupleRow::GetTuple(), impala::Tuple::IsNull(), null_indicator_offset_, slot_offset_, tuple_idx_, impala::ColumnType::type, impala::Expr::type_, and impala::TYPE_BIGINT.

BooleanVal impala::SlotRef::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 371 of file slot-ref.cc.

References impala::Tuple::GetSlot(), impala::TupleRow::GetTuple(), impala::Tuple::IsNull(), null_indicator_offset_, slot_offset_, tuple_idx_, impala::ColumnType::type, impala::Expr::type_, and impala::TYPE_BOOLEAN.

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::SlotRef::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 155 of file slot-ref.cc.

References impala::NullIndicatorOffset::bit_mask, impala::NullIndicatorOffset::byte_offset, impala::LlvmCodeGen::context(), impala::Expr::CreateIrFunctionPrototype(), impala::LlvmCodeGen::FinalizeFunction(), impala::RuntimeState::GetCodegen(), impala::CodegenAnyVal::GetNonNullVal(), impala::Expr::GetNumChildren(), impala::LlvmCodeGen::GetPtrType(), impala::LlvmCodeGen::GetRegisteredExprFn(), impala::LlvmCodeGen::GetType(), impala::LlvmCodeGen::int_type(), impala::Expr::ir_compute_fn_, impala::ColumnType::IsStringType(), null_indicator_offset_, impala::Status::OK, impala::LlvmCodeGen::ptr_type(), impala::LlvmCodeGen::RegisterExprFn(), RETURN_IF_ERROR, impala::CodegenAnyVal::SetDate(), impala::CodegenAnyVal::SetIsNull(), impala::CodegenAnyVal::SetLen(), impala::CodegenAnyVal::SetPtr(), impala::CodegenAnyVal::SetTimeOfDay(), impala::CodegenAnyVal::SetVal(), slot_id_, slot_offset_, impala::LlvmCodeGen::tinyint_type(), tuple_idx_, tuple_is_nullable_, impala::ColumnType::type, impala::Expr::type(), impala::Expr::type_, impala::TYPE_BIGINT, impala::TYPE_CHAR, impala::TYPE_INT, impala::TYPE_TIMESTAMP, impala::TYPE_TINYINT, and impala::CodegenAnyVal::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::SlotRef::GetDecimalVal ( ExprContext *  context,
TupleRow *  row 
)
virtual

Reimplemented from impala::Expr.

Definition at line 446 of file slot-ref.cc.

References impala::ColumnType::GetByteSize(), impala::Tuple::GetSlot(), impala::TupleRow::GetTuple(), impala::Tuple::IsNull(), null_indicator_offset_, slot_offset_, tuple_idx_, impala::ColumnType::type, impala::Expr::type_, and impala::TYPE_DECIMAL.

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

Reimplemented from impala::Expr.

Definition at line 413 of file slot-ref.cc.

References impala::Tuple::GetSlot(), impala::TupleRow::GetTuple(), impala::Tuple::IsNull(), null_indicator_offset_, slot_offset_, tuple_idx_, impala::ColumnType::type, impala::Expr::type_, and impala::TYPE_DOUBLE.

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

Reimplemented from impala::Expr.

Definition at line 406 of file slot-ref.cc.

References impala::Tuple::GetSlot(), impala::TupleRow::GetTuple(), impala::Tuple::IsNull(), null_indicator_offset_, slot_offset_, tuple_idx_, impala::ColumnType::type, impala::Expr::type_, and impala::TYPE_FLOAT.

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

Reimplemented from impala::Expr.

Definition at line 392 of file slot-ref.cc.

References impala::Tuple::GetSlot(), impala::TupleRow::GetTuple(), impala::Tuple::IsNull(), null_indicator_offset_, slot_offset_, tuple_idx_, impala::ColumnType::type, impala::Expr::type_, and impala::TYPE_INT.

int impala::Expr::GetNumChildren ( ) const
inlineinherited

Definition at line 143 of file expr.h.

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

int impala::SlotRef::GetSlotIds ( std::vector< SlotId > *  slot_ids) const
virtual

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

Reimplemented from impala::Expr.

Definition at line 99 of file slot-ref.cc.

References slot_id_.

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

Reimplemented from impala::Expr.

Definition at line 385 of file slot-ref.cc.

References impala::Tuple::GetSlot(), impala::TupleRow::GetTuple(), impala::Tuple::IsNull(), null_indicator_offset_, slot_offset_, tuple_idx_, impala::ColumnType::type, impala::Expr::type_, and impala::TYPE_SMALLINT.

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::SlotRef::GetStringVal ( ExprContext *  context,
TupleRow *  row 
)
virtual

Reimplemented from impala::Expr.

Definition at line 420 of file slot-ref.cc.

References impala::StringValue::CharSlotToPtr(), impala::TupleRow::GetTuple(), impala::ColumnType::IsStringType(), impala::ColumnType::len, impala_udf::StringVal::len, null_indicator_offset_, impala_udf::StringVal::ptr, slot_offset_, impala::StringValue::ToStringVal(), tuple_idx_, impala::ColumnType::type, impala::Expr::type_, and impala::TYPE_CHAR.

TimestampVal impala::SlotRef::GetTimestampVal ( ExprContext *  context,
TupleRow *  row 
)
virtual

Reimplemented from impala::Expr.

Definition at line 436 of file slot-ref.cc.

References impala::Tuple::GetSlot(), impala::TupleRow::GetTuple(), impala::Tuple::IsNull(), null_indicator_offset_, slot_offset_, impala::TimestampValue::ToTimestampVal(), tuple_idx_, impala::ColumnType::type, impala::Expr::type_, and impala::TYPE_TIMESTAMP.

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

Reimplemented from impala::Expr.

Definition at line 378 of file slot-ref.cc.

References impala::Tuple::GetSlot(), impala::TupleRow::GetTuple(), impala::Tuple::IsNull(), null_indicator_offset_, slot_offset_, tuple_idx_, impala::ColumnType::type, impala::Expr::type_, and impala::TYPE_TINYINT.

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.

virtual bool impala::SlotRef::IsConstant ( ) const
inlinevirtual

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 from impala::Expr.

Definition at line 38 of file slot-ref.h.

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.

Status impala::SlotRef::Prepare ( RuntimeState *  state,
const RowDescriptor &  row_desc,
ExprContext *  context 
)
virtual

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 from impala::Expr.

Definition at line 63 of file slot-ref.cc.

References impala::Expr::children_, impala::SlotDescriptor::DebugString(), impala::TupleDescriptor::DebugString(), impala::RowDescriptor::DebugString(), impala::RuntimeState::desc_tbl(), impala::DescriptorTbl::GetSlotDescriptor(), impala::DescriptorTbl::GetTupleDescriptor(), impala::RowDescriptor::GetTupleIdx(), impala::RowDescriptor::INVALID_IDX, impala::SlotDescriptor::is_materialized(), impala::SlotDescriptor::null_indicator_offset(), null_indicator_offset_, impala::Status::OK, impala::SlotDescriptor::parent(), slot_id_, slot_offset_, tuple_idx_, tuple_is_nullable_, impala::SlotDescriptor::tuple_offset(), and impala::RowDescriptor::TupleIsNullable().

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().

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 SlotId& impala::SlotRef::slot_id ( ) const
inline

Definition at line 40 of file slot-ref.h.

References slot_id_.

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(), impala::Literal::DebugString(), impala::HiveUdfCall::Evaluate(), impala::ScalarFnCall::EvaluateChildren(), impala::CaseExpr::GetChildVal(), impala::CaseExpr::GetCodegendComputeFn(), GetCodegendComputeFn(), impala::Literal::GetCodegendComputeFn(), impala::ScalarFnCall::GetCodegendComputeFn(), impala::Expr::GetCodegendComputeFnWrapper(), impala::Expr::GetConstVal(), impala::Literal::GetDecimalVal(), impala::ScalarFnCall::GetUdf(), impala::Literal::Literal(), impala::ScalarFnCall::Open(), impala::HiveUdfCall::Open(), impala::ScalarFnCall::Prepare(), impala::HiveUdfCall::Prepare(), and impala::DataStreamSender::Send().

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(), 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(), GetCodegendComputeFn(), impala::Literal::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().

NullIndicatorOffset impala::SlotRef::null_indicator_offset_
protected

Definition at line 58 of file slot-ref.h.

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

int impala::Expr::output_scale_
protectedinherited

Definition at line 291 of file expr.h.

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

const SlotId impala::SlotRef::slot_id_
protected

Definition at line 59 of file slot-ref.h.

Referenced by DebugString(), GetCodegendComputeFn(), GetSlotIds(), Prepare(), and slot_id().

int impala::SlotRef::slot_offset_
protected

Definition at line 57 of file slot-ref.h.

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

int impala::SlotRef::tuple_idx_
protected

Definition at line 56 of file slot-ref.h.

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

bool impala::SlotRef::tuple_is_nullable_
protected

Definition at line 60 of file slot-ref.h.

Referenced by DebugString(), GetCodegendComputeFn(), and Prepare().

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

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