OrderingElementsGuard Class Reference

A scope-guard class for allocating an Ordering::Elements instance which is automatically returned to the pool when we exit the scope of the OrderingElementsGuard instance. More...

Public Member Functions
	OrderingElementsGuard (LogicalOrderings *context, MEM_ROOT *mem_root)
	OrderingElementsGuard (const OrderingElementsGuard &)=delete
OrderingElementsGuard &	operator= (const OrderingElementsGuard &)=delete
	~OrderingElementsGuard ()
Ordering::Elements &	Get ()

Private Attributes
LogicalOrderings *	m_context
	The object containing the pool. More...
Ordering::Elements	m_elements
	The instance fetched from the pool. More...

Detailed Description

A scope-guard class for allocating an Ordering::Elements instance which is automatically returned to the pool when we exit the scope of the OrderingElementsGuard instance.

Constructor & Destructor Documentation

OrderingElementsGuard() [1/2]

OrderingElementsGuard::OrderingElementsGuard ( LogicalOrderings *  context, MEM_ROOT *  mem_root  )

inline

Parameters

context	The object containing the pool.
mem_root	For allocating additional Ordering::Elements instances if needed.

OrderingElementsGuard() [2/2]

OrderingElementsGuard::OrderingElementsGuard ( const OrderingElementsGuard &  )

delete

~OrderingElementsGuard()

OrderingElementsGuard::~OrderingElementsGuard ( )

inline

Member Function Documentation

Get()

Ordering::Elements & OrderingElementsGuard::Get ( )

inline

operator=()

OrderingElementsGuard & OrderingElementsGuard::operator= ( const OrderingElementsGuard &  )

delete

Member Data Documentation

m_context

LogicalOrderings* OrderingElementsGuard::m_context

private

The object containing the pool.

m_elements

Ordering::Elements OrderingElementsGuard::m_elements

private

The instance fetched from the pool.

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

• sql/join_optimizer/interesting_orders.cc