JOIN::ORDER_with_src Class Reference

#include <sql_optimizer.h>

List of all members.

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

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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.

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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.

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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.

ORDER_with_src& JOIN::ORDER_with_src::operator=

(

null *

)

[inline]

Type-safe NULL assignment

See a commentary for the "null" type above.

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

• sql_optimizer.h