ExplainPhysicalOperator类 参考

Explain物理算子 更多...

#include <explain_physical_operator.h>

类 ExplainPhysicalOperator 继承关系图:

Public 成员函数
PhysicalOperatorType	type () const override
RC	open (Trx *trx) override
RC	next () override
RC	close () override
Tuple *	current_tuple () override
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 成员函数
void	to_string (std::ostream &os, PhysicalOperator *oper, int level, bool last_child, std::vector< bool > &ends)

Private 属性
std::string	physical_plan_
ValueListTuple	tuple_

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

详细描述

Explain物理算子

成员函数说明

close()

RC ExplainPhysicalOperator::close ( )

overridevirtual

实现了 PhysicalOperator.

current_tuple()

Tuple * ExplainPhysicalOperator::current_tuple ( )

overridevirtual

实现了 PhysicalOperator.

next()

RC ExplainPhysicalOperator::next ( )

overridevirtual

实现了 PhysicalOperator.

open()

RC ExplainPhysicalOperator::open ( Trx *  trx )

overridevirtual

实现了 PhysicalOperator.

to_string()

void ExplainPhysicalOperator::to_string ( std::ostream &  os, PhysicalOperator *  oper, int  level, bool  last_child, std::vector< bool > &  ends  )

private

递归打印某个算子

参数

os	结果输出到这里
oper	将要打印的算子
level	当前算子在第几层
last_child	当前算子是否是当前兄弟节点中最后一个节点
ends	表示当前某个层级上的算子，是否已经没有其它的节点，以判断使用什么打印符号

type()

PhysicalOperatorType ExplainPhysicalOperator::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/explain_physical_operator.h
• src/observer/sql/operator/explain_physical_operator.cpp