CalcPhysicalOperator类 参考

类 CalcPhysicalOperator 继承关系图:

Public 成员函数
	CalcPhysicalOperator (std::vector< std::unique_ptr< Expression > > &&expressions)
PhysicalOperatorType	type () const override
std::string	name () const override
std::string	param () const override
RC	open (Trx *trx) override
RC	next () override
RC	close () override
int	cell_num () const
Tuple *	current_tuple () override
const std::vector< std::unique_ptr< Expression > > &	expressions () const
Public 成员函数 继承自 PhysicalOperator
virtual std::string	name () const
virtual std::string	param () const
virtual PhysicalOperatorType	type () const =0
virtual RC	open (Trx *trx)=0
virtual RC	next ()=0
virtual RC	close ()=0
virtual Tuple *	current_tuple ()=0
void	add_child (std::unique_ptr< PhysicalOperator > oper)
std::vector< std::unique_ptr< PhysicalOperator > > &	children ()

Private 属性
std::vector< std::unique_ptr< Expression > >	expressions_
ExpressionTuple	tuple_
bool	emitted_ = false

额外继承的成员函数
Protected 属性 继承自 PhysicalOperator
std::vector< std::unique_ptr< PhysicalOperator > >	children_

成员函数说明

close()

RC CalcPhysicalOperator::close ( )

inlineoverridevirtual

实现了 PhysicalOperator.

current_tuple()

Tuple * CalcPhysicalOperator::current_tuple ( )

inlineoverridevirtual

实现了 PhysicalOperator.

name()

std::string CalcPhysicalOperator::name ( ) const

inlineoverridevirtual

这两个函数是为了打印时使用的，比如在explain中

重载 PhysicalOperator .

next()

RC CalcPhysicalOperator::next ( )

inlineoverridevirtual

实现了 PhysicalOperator.

open()

RC CalcPhysicalOperator::open ( Trx *  trx )

inlineoverridevirtual

实现了 PhysicalOperator.

param()

std::string CalcPhysicalOperator::param ( ) const

inlineoverridevirtual

重载 PhysicalOperator .

type()

PhysicalOperatorType CalcPhysicalOperator::type ( ) const

inlineoverridevirtual

实现了 PhysicalOperator.

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该类的文档由以下文件生成:

• src/observer/sql/operator/calc_physical_operator.h