TableGetLogicalOperator类 参考

表示从表中获取数据的算子 更多...

#include <table_get_logical_operator.h>

类 TableGetLogicalOperator 继承关系图:

Public 成员函数
	TableGetLogicalOperator (Table *table, ReadWriteMode mode)
LogicalOperatorType	type () const override
OpType	get_op_type () const override
virtual uint64_t	hash () const override
virtual bool	operator== (const OperatorNode &other) const override
unique_ptr< LogicalProperty >	find_log_prop (const vector< LogicalProperty * > &log_props) override
	Generate the logical property of the operator node using the input logical properties. 更多...
Table *	table () const
ReadWriteMode	read_write_mode () const
void	set_predicates (vector< unique_ptr< Expression > > &&exprs)
auto	predicates () -> vector< unique_ptr< Expression > > &
Public 成员函数 继承自 LogicalOperator
virtual LogicalOperatorType	type () const =0
bool	is_physical () const override
bool	is_logical () const override
void	add_child (unique_ptr< LogicalOperator > oper)
void	add_expressions (unique_ptr< Expression > expr)
auto	children () -> vector< unique_ptr< LogicalOperator > > &
auto	expressions () -> vector< unique_ptr< Expression > > &
void	generate_general_child ()
Public 成员函数 继承自 OperatorNode
virtual OpType	get_op_type () const
virtual bool	is_physical () const =0
virtual bool	is_logical () const =0
virtual uint64_t	hash () const
virtual bool	operator== (const OperatorNode &other) const
virtual unique_ptr< LogicalProperty >	find_log_prop (const vector< LogicalProperty * > &log_props)
	Generate the logical property of the operator node using the input logical properties. 更多...
virtual double	calculate_cost (LogicalProperty *prop, const vector< LogicalProperty * > &child_log_props, CostModel *cm)
	Calculates the cost of a logical operation. 更多...
void	add_general_child (OperatorNode *child)
vector< OperatorNode * > &	get_general_children ()

Private 属性
Table *	table_ = nullptr
ReadWriteMode	mode_ = ReadWriteMode::READ_WRITE
vector< unique_ptr< Expression > >	predicates_

额外继承的成员函数
静态 Public 成员函数 继承自 LogicalOperator
static bool	can_generate_vectorized_operator (const LogicalOperatorType &type)
Protected 属性 继承自 LogicalOperator
vector< unique_ptr< LogicalOperator > >	children_
	子算子 更多...
vector< unique_ptr< Expression > >	expressions_
Protected 属性 继承自 OperatorNode
vector< OperatorNode * >	general_children_

详细描述

表示从表中获取数据的算子

比如使用全表扫描、通过索引获取数据等

成员函数说明

find_log_prop()

unique_ptr< LogicalProperty > TableGetLogicalOperator::find_log_prop ( const vector< LogicalProperty * > &  log_props )

overridevirtual

Generate the logical property of the operator node using the input logical properties.

参数

log_props

Input logical properties of the operator node.

返回

Logical property of the operator node.

重载 OperatorNode .

get_op_type()

OpType TableGetLogicalOperator::get_op_type ( ) const

inlineoverridevirtual

TODO: add this function TODO: unify logical and physical OpType

重载 OperatorNode .

hash()

virtual uint64_t TableGetLogicalOperator::hash ( ) const

inlineoverridevirtual

TODO: complete it if needed

重载 OperatorNode .

operator==()

virtual bool TableGetLogicalOperator::operator== ( const OperatorNode &  other ) const

inlineoverridevirtual

重载 OperatorNode .

type()

LogicalOperatorType TableGetLogicalOperator::type ( ) const

inlineoverridevirtual

实现了 LogicalOperator.

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该类的文档由以下文件生成:

• src/observer/sql/operator/table_get_logical_operator.h
• src/observer/sql/operator/table_get_logical_operator.cpp