JOIN::ORDER_with_src Class Reference

#include <sql_optimizer.h>

Collaboration diagram for JOIN::ORDER_with_src:

Classes
struct	null

Public Member Functions
	ORDER_with_src (ORDER *order_arg, Explain_sort_clause src_arg)
ORDER_with_src &	operator= (null *)
	ORDER_with_src (null *)
	operator ORDER * ()
	operator const ORDER * () const
ORDER *	operator-> () const
void	clean ()
void	set_flag (Explain_sort_property flag)
void	reset_flag (Explain_sort_property flag)
bool	get_flag (Explain_sort_property flag) const
int	get_flags () const

Public Attributes
ORDER *	order
Explain_sort_clause	src

Detailed Description

Wrapper for ORDER* pointer to trace origins of ORDER list

As far as ORDER is just a head object of ORDER expression chain, we need some wrapper object to associate flags with the whole ORDER list.

Definition at line 240 of file sql_optimizer.h.

Constructor & Destructor Documentation

JOIN::ORDER_with_src::ORDER_with_src ( null *  )

inline

Type-safe constructor from NULL

See a commentary for the "null" type above.

Definition at line 281 of file sql_optimizer.h.

Member Function Documentation

JOIN::ORDER_with_src::operator ORDER * ( )

inline

Transparent access to the wrapped order list

These operators are safe, since we don't do any conversion of ORDER_with_src value, but just an access to the wrapped ORDER pointer value. We can use ORDER_with_src objects instead ORDER pointers in a transparent way without accessor functions.

Note

This operator also implements safe "operator bool()" functionality.

Definition at line 295 of file sql_optimizer.h.

ORDER_with_src& JOIN::ORDER_with_src::operator= ( null *  )

inline

Type-safe NULL assignment

See a commentary for the "null" type above.

Definition at line 274 of file sql_optimizer.h.

---

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

• sql/sql_optimizer.h