IndexMergeIterator Class Reference

#include <index_merge.h>

Inheritance diagram for IndexMergeIterator:

Public Member Functions
	IndexMergeIterator (THD *thd, MEM_ROOT *mem_root, TABLE *table, unique_ptr_destroy_only< RowIterator > pk_quick_select, Mem_root_array< unique_ptr_destroy_only< RowIterator > > children)
	~IndexMergeIterator () override
Public Member Functions inherited from TableRowIterator
	TableRowIterator (THD *thd, TABLE *table)
void	UnlockRow () override
	The default implementation of unlock-row method of RowIterator, used in all access methods except EQRefIterator. More...
void	SetNullRowFlag (bool is_null_row) override
	Mark the current row buffer as containing a NULL row or not, so that if you read from it and the flag is true, you'll get only NULLs no matter what is actually in the buffer (typically some old leftover row). More...
void	StartPSIBatchMode () override
	Start performance schema batch mode, if supported (otherwise ignored). More...
void	EndPSIBatchModeIfStarted () override
	Ends performance schema batch mode, if started. More...
Public Member Functions inherited from RowIterator
	RowIterator (THD *thd)
virtual	~RowIterator ()=default
	RowIterator (const RowIterator &)=delete
	RowIterator (RowIterator &&)=default
bool	Init ()
	Initialize or reinitialize the iterator. More...
int	Read ()
	Read a single row. More...
virtual const IteratorProfiler *	GetProfiler () const
	Get profiling data for this iterator (for 'EXPLAIN ANALYZE'). More...
virtual void	SetOverrideProfiler (const IteratorProfiler *profiler)
virtual RowIterator *	real_iterator ()
	If this iterator is wrapping a different iterator (e.g. More...
virtual const RowIterator *	real_iterator () const
uint64_t	num_init_calls () const
	Returns the number of times Init() has been called on this iterator. More...
uint64_t	num_rows () const
	Returns the number of times Read() has returned a row successfully from this iterator. More...
uint64_t	num_full_reads () const
	Returns the number of times the iterator has been fully read. More...

Private Member Functions
bool	DoInit () override
int	DoRead () override

Private Attributes
unique_ptr_destroy_only< Unique >	unique
unique_ptr_destroy_only< RowIterator >	read_record
unique_ptr_destroy_only< RowIterator >	pk_quick_select
Mem_root_array< unique_ptr_destroy_only< RowIterator > >	m_children
bool	doing_pk_scan
MEM_ROOT *	mem_root

Additional Inherited Members
Protected Member Functions inherited from TableRowIterator
int	HandleError (int error)
void	PrintError (int error)
TABLE *	table () const
Protected Member Functions inherited from RowIterator
THD *	thd () const

Constructor & Destructor Documentation

IndexMergeIterator()

IndexMergeIterator::IndexMergeIterator	(	THD *	thd,
		MEM_ROOT *	mem_root,
		TABLE *	table,
		unique_ptr_destroy_only< RowIterator >	pk_quick_select,
		Mem_root_array< unique_ptr_destroy_only< RowIterator > >	children
	)

~IndexMergeIterator()

IndexMergeIterator::~IndexMergeIterator ( )

override

Member Function Documentation

DoInit()

bool IndexMergeIterator::DoInit ( )

overrideprivatevirtual

Implements RowIterator.

DoRead()

int IndexMergeIterator::DoRead ( )

overrideprivatevirtual

Implements RowIterator.

Member Data Documentation

doing_pk_scan

bool IndexMergeIterator::doing_pk_scan

private

m_children

Mem_root_array<unique_ptr_destroy_only<RowIterator> > IndexMergeIterator::m_children

private

mem_root

MEM_ROOT* IndexMergeIterator::mem_root

private

pk_quick_select

unique_ptr_destroy_only<RowIterator> IndexMergeIterator::pk_quick_select

private

read_record

unique_ptr_destroy_only<RowIterator> IndexMergeIterator::read_record

private

unique

unique_ptr_destroy_only<Unique> IndexMergeIterator::unique

private

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

• sql/range_optimizer/index_merge.h
• sql/range_optimizer/index_merge.cc