LogicalOrderings::OrderWithElementInserted Class Reference

Given an order O and a functional dependency FD: S → x where S is a subset of O, create new orderings by inserting x into O at different positions, and add those to the set of orderings if they could become interesting (. More...

Public Member Functions
OrderWithElementInserted &	SetContext (LogicalOrderings *context)
OrderWithElementInserted &	SetStateIdx (int state_idx)
OrderWithElementInserted &	SetFdIdx (int fd_idx)
OrderWithElementInserted &	SetOldOrdering (Ordering old_ordering)
OrderWithElementInserted &	SetStartPoint (size_t start_point)
OrderWithElementInserted &	SetItemToAdd (ItemHandle item_to_add)
OrderWithElementInserted &	SetDirection (enum_order direction)
void	AddPotentiallyInterestingOrders (THD *thd)
	Add any potentially interesting orders. More...

Private Attributes
LogicalOrderings *	m_context
	The enclosing LogicalOrderings instance. More...
int	m_state_idx
	The originator state. More...
int	m_fd_idx
	The functional dependency with which we will extend m_old_ordering. More...
Ordering	m_old_ordering
	The ordering to be extended. More...
size_t	m_start_point
	The first position at which m_item_to_add. More...
ItemHandle	m_item_to_add
	The item to add to the ordering. More...
enum_order	m_direction
	The desired direction of the extended ordering. More...

Detailed Description

Given an order O and a functional dependency FD: S → x where S is a subset of O, create new orderings by inserting x into O at different positions, and add those to the set of orderings if they could become interesting (.

See also

LogicalOrderings::CouldBecomeInterestingOrdering(Ordering ordering)).

This operation is implemented as a class to avoid an excessively long parameter list.

Member Function Documentation

AddPotentiallyInterestingOrders()

void LogicalOrderings::OrderWithElementInserted::AddPotentiallyInterestingOrders

(

THD *

thd

)

Add any potentially interesting orders.

SetContext()

OrderWithElementInserted & LogicalOrderings::OrderWithElementInserted::SetContext ( LogicalOrderings *  context )

inline

SetDirection()

OrderWithElementInserted & LogicalOrderings::OrderWithElementInserted::SetDirection ( enum_order  direction )

inline

SetFdIdx()

OrderWithElementInserted & LogicalOrderings::OrderWithElementInserted::SetFdIdx ( int  fd_idx )

inline

SetItemToAdd()

OrderWithElementInserted & LogicalOrderings::OrderWithElementInserted::SetItemToAdd ( ItemHandle  item_to_add )

inline

SetOldOrdering()

OrderWithElementInserted & LogicalOrderings::OrderWithElementInserted::SetOldOrdering ( Ordering  old_ordering )

inline

SetStartPoint()

OrderWithElementInserted & LogicalOrderings::OrderWithElementInserted::SetStartPoint ( size_t  start_point )

inline

SetStateIdx()

OrderWithElementInserted & LogicalOrderings::OrderWithElementInserted::SetStateIdx ( int  state_idx )

inline

Member Data Documentation

m_context

LogicalOrderings* LogicalOrderings::OrderWithElementInserted::m_context

private

The enclosing LogicalOrderings instance.

m_direction

enum_order LogicalOrderings::OrderWithElementInserted::m_direction

private

The desired direction of the extended ordering.

m_fd_idx

int LogicalOrderings::OrderWithElementInserted::m_fd_idx

private

The functional dependency with which we will extend m_old_ordering.

m_item_to_add

ItemHandle LogicalOrderings::OrderWithElementInserted::m_item_to_add

private

The item to add to the ordering.

m_old_ordering

Ordering LogicalOrderings::OrderWithElementInserted::m_old_ordering

private

The ordering to be extended.

m_start_point

size_t LogicalOrderings::OrderWithElementInserted::m_start_point

private

The first position at which m_item_to_add.

If ordering is needed, this must be behind the last element of the FD head.

m_state_idx

int LogicalOrderings::OrderWithElementInserted::m_state_idx

private

The originator state.

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

• sql/join_optimizer/interesting_orders.cc