QgsSQLStatement::Node Class Reference

Abstract node class. More...

#include <qgssqlstatement.h>

Inheritance diagram for QgsSQLStatement::Node:

Public Member Functions
virtual	~Node ()=default
virtual void	accept (QgsSQLStatement::Visitor &v) const =0
	Support the visitor pattern. More...
virtual QgsSQLStatement::Node *	clone () const =0
	Generate a clone of this node. More...
virtual QString	dump () const =0
	Abstract virtual dump method. More...
virtual QgsSQLStatement::NodeType	nodeType () const =0
	Abstract virtual that returns the type of this node. More...

Detailed Description

Abstract node class.

Definition at line 215 of file qgssqlstatement.h.

Constructor & Destructor Documentation

~Node()

virtual QgsSQLStatement::Node::~Node ( )

virtualdefault

Member Function Documentation

accept()

virtual void QgsSQLStatement::Node::accept ( QgsSQLStatement::Visitor &  v ) const

pure virtual

Support the visitor pattern.

For any implementation this should look like

C++:

v.visit( *this );

Python:

v.visit( self)

Parameters

v	A visitor that visits this node.

Implemented in QgsSQLStatement::NodeSelect, QgsSQLStatement::NodeColumnSorted, QgsSQLStatement::NodeJoin, QgsSQLStatement::NodeTableDef, QgsSQLStatement::NodeCast, QgsSQLStatement::NodeSelectedColumn, QgsSQLStatement::NodeColumnRef, QgsSQLStatement::NodeLiteral, QgsSQLStatement::NodeFunction, QgsSQLStatement::NodeBetweenOperator, QgsSQLStatement::NodeInOperator, QgsSQLStatement::NodeBinaryOperator, and QgsSQLStatement::NodeUnaryOperator.

clone()

virtual QgsSQLStatement::Node* QgsSQLStatement::Node::clone ( ) const

pure virtual

Generate a clone of this node.

Make sure that the clone does not contain any information which is generated in prepare and context related. Ownership is transferred to the caller.

Returns

a deep copy of this node.

Implemented in QgsSQLStatement::NodeSelect, QgsSQLStatement::NodeColumnSorted, QgsSQLStatement::NodeJoin, QgsSQLStatement::NodeTableDef, QgsSQLStatement::NodeCast, QgsSQLStatement::NodeSelectedColumn, QgsSQLStatement::NodeColumnRef, QgsSQLStatement::NodeLiteral, QgsSQLStatement::NodeFunction, QgsSQLStatement::NodeBetweenOperator, QgsSQLStatement::NodeInOperator, QgsSQLStatement::NodeBinaryOperator, and QgsSQLStatement::NodeUnaryOperator.

dump()

virtual QString QgsSQLStatement::Node::dump ( ) const

pure virtual

Abstract virtual dump method.

Returns

A statement which represents this node as string

Implemented in QgsSQLStatement::NodeSelect, QgsSQLStatement::NodeColumnSorted, QgsSQLStatement::NodeJoin, QgsSQLStatement::NodeTableDef, QgsSQLStatement::NodeCast, QgsSQLStatement::NodeSelectedColumn, QgsSQLStatement::NodeColumnRef, QgsSQLStatement::NodeLiteral, QgsSQLStatement::NodeFunction, QgsSQLStatement::NodeBetweenOperator, QgsSQLStatement::NodeInOperator, QgsSQLStatement::NodeBinaryOperator, and QgsSQLStatement::NodeUnaryOperator.

nodeType()

virtual QgsSQLStatement::NodeType QgsSQLStatement::Node::nodeType ( ) const

pure virtual

Abstract virtual that returns the type of this node.

Returns

The type of this node

Implemented in QgsSQLStatement::NodeSelect, QgsSQLStatement::NodeColumnSorted, QgsSQLStatement::NodeJoin, QgsSQLStatement::NodeTableDef, QgsSQLStatement::NodeCast, QgsSQLStatement::NodeSelectedColumn, QgsSQLStatement::NodeColumnRef, QgsSQLStatement::NodeLiteral, QgsSQLStatement::NodeFunction, QgsSQLStatement::NodeBetweenOperator, QgsSQLStatement::NodeInOperator, QgsSQLStatement::NodeBinaryOperator, and QgsSQLStatement::NodeUnaryOperator.

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

• /tmp/buildd/qgis-3.8.0+99unstable/src/core/qgssqlstatement.h