OperatorNode类 参考

类 OperatorNode 继承关系图:

Public 成员函数
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 ()

Protected 属性
vector< OperatorNode * >	general_children_

成员函数说明

calculate_cost()

virtual double OperatorNode::calculate_cost ( LogicalProperty *  prop, const vector< LogicalProperty * > &  child_log_props, CostModel *  cm  )

inlinevirtual

Calculates the cost of a logical operation.

This function is intended to be overridden in derived classes. It calculates the cost associated with a specific logical property, taking into account the provided child logical properties and a cost model.

参数

prop	A pointer to the logical property for which the cost is being calculated.
child_log_props	A vector containing pointers to child logical properties.
cm	A pointer to the cost model used for calculating the cost.

返回

The calculated cost as a double.

被 ExplainPhysicalOperator, NestedLoopJoinPhysicalOperator, ProjectPhysicalOperator , 以及 TableScanPhysicalOperator 重载.

find_log_prop()

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

inlinevirtual

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.

被 JoinLogicalOperator, ProjectLogicalOperator , 以及 TableGetLogicalOperator 重载.

get_op_type()

virtual OpType OperatorNode::get_op_type ( ) const

inlinevirtual

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

被 CalcLogicalOperator, CalcPhysicalOperator, DeleteLogicalOperator, DeletePhysicalOperator, ExplainLogicalOperator, ExplainPhysicalOperator, GroupByLogicalOperator, HashGroupByPhysicalOperator, InsertLogicalOperator, InsertPhysicalOperator, JoinLogicalOperator, NestedLoopJoinPhysicalOperator, PredicateLogicalOperator, PredicatePhysicalOperator, ProjectLogicalOperator, ProjectPhysicalOperator, ScalarGroupByPhysicalOperator, TableGetLogicalOperator , 以及 TableScanPhysicalOperator 重载.

hash()

virtual uint64_t OperatorNode::hash ( ) const

inlinevirtual

TODO: complete it if needed

被 TableGetLogicalOperator , 以及 TableScanPhysicalOperator 重载.

is_logical()

virtual bool OperatorNode::is_logical ( ) const

pure virtual

返回

Whether node represents a logical operator / expression

在 LogicalOperator , 以及 PhysicalOperator 内被实现.

is_physical()

virtual bool OperatorNode::is_physical ( ) const

pure virtual

返回

Whether node contents represent a physical operator / expression

在 LogicalOperator , 以及 PhysicalOperator 内被实现.

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该类的文档由以下文件生成:

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