#include <group_index_skip_scan.h>

Inheritance diagram for GroupIndexSkipScanIterator:

Public Member Functions
	GroupIndexSkipScanIterator (THD thd, TABLE table_arg, const Mem_root_array< Item_sum * > min_functions, const Mem_root_array< Item_sum > max_functions, bool have_agg_distinct, KEY_PART_INFO min_max_arg_part, uint group_prefix_len, uint group_key_parts, uint real_key_parts, uint max_used_key_length_arg, KEY index_info, uint use_index, uint key_infix_len, MEM_ROOT return_mem_root, bool is_index_scan, const Quick_ranges prefix_ranges, const Quick_ranges_array key_infix_ranges, const Quick_ranges *min_max_ranges)

	~GroupIndexSkipScanIterator () override

bool	Init () override
	Initialize or reinitialize the iterator. More...

int	Read () override
	Read a single row. More...

bool	is_agg_distinct () const

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

virtual const IteratorProfiler *	GetProfiler () const
	Get profiling data for this iterator (for 'EXPLAIN ANALYZE'). More...

virtual void	SetOverrideProfiler ([[maybe_unused]] const IteratorProfiler *profiler)

virtual RowIterator *	real_iterator ()
	If this iterator is wrapping a different iterator (e.g. More...

virtual const RowIterator *	real_iterator () const

Private Member Functions
int	next_prefix ()

int	get_next_prefix (uint prefix_length, uint group_key_parts, uchar *cur_prefix)

bool	append_next_infix ()

void	reset_group ()

int	next_min_in_range ()

int	next_max_in_range ()

int	next_min ()

int	next_max ()

void	update_min_result (bool *reset)

void	update_max_result (bool *reset)

Private Attributes
uint	index

KEY *	index_info

uchar *	group_prefix

const uint	group_prefix_len

uint	group_key_parts

uchar *	last_prefix

bool	have_agg_distinct

bool	seen_first_key

KEY_PART_INFO *	min_max_arg_part

uint	min_max_arg_len

bool	min_max_keypart_asc

uint	key_infix_len

uint	max_used_key_length

uint	cur_infix_range_position [MAX_REF_PARTS]

bool	seen_all_infix_ranges

const Quick_ranges *	prefix_ranges

unsigned	cur_prefix_range_idx

QUICK_RANGE *	last_prefix_range

const Quick_ranges *	min_max_ranges

const Quick_ranges_array *	key_infix_ranges

uint	real_prefix_len

uint	real_key_parts

const Mem_root_array< Item_sum * > *	min_functions

const Mem_root_array< Item_sum * > *	max_functions

bool	is_index_scan

bool	m_seen_eof

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

◆ GroupIndexSkipScanIterator()

GroupIndexSkipScanIterator::GroupIndexSkipScanIterator	(	THD *	thd,
		TABLE *	table_arg,
		const Mem_root_array< Item_sum * > *	min_functions,
		const Mem_root_array< Item_sum * > *	max_functions,
		bool	have_agg_distinct,
		KEY_PART_INFO *	min_max_arg_part,
		uint	group_prefix_len,
		uint	group_key_parts,
		uint	real_key_parts,
		uint	max_used_key_length_arg,
		KEY *	index_info,
		uint	use_index,
		uint	key_infix_len,
		MEM_ROOT *	return_mem_root,
		bool	is_index_scan,
		const Quick_ranges *	prefix_ranges,
		const Quick_ranges_array *	key_infix_ranges,
		const Quick_ranges *	min_max_ranges
	)

◆ ~GroupIndexSkipScanIterator()

GroupIndexSkipScanIterator::~GroupIndexSkipScanIterator ( )

override

Member Function Documentation

◆ append_next_infix()

bool GroupIndexSkipScanIterator::append_next_infix ( )

private

◆ get_next_prefix()

int GroupIndexSkipScanIterator::get_next_prefix	(	uint	prefix_length,
		uint	group_key_parts,
		uchar *	cur_prefix
	)

private

◆ Init()

bool GroupIndexSkipScanIterator::Init ( )

overridevirtual

Initialize or reinitialize the iterator.

You must always call Init() before trying a Read() (but Init() does not imply Read()).

You can call Init() multiple times; subsequent calls will rewind the iterator (or reposition it, depending on whether the iterator takes in e.g. a Index_lookup) and allow you to read the records anew.

Implements RowIterator.

◆ is_agg_distinct()

bool GroupIndexSkipScanIterator::is_agg_distinct ( ) const

inline

◆ next_max()

int GroupIndexSkipScanIterator::next_max ( )

private

◆ next_max_in_range()

int GroupIndexSkipScanIterator::next_max_in_range ( )

private

◆ next_min()

int GroupIndexSkipScanIterator::next_min ( )

private

◆ next_min_in_range()

int GroupIndexSkipScanIterator::next_min_in_range ( )

private

◆ next_prefix()

int GroupIndexSkipScanIterator::next_prefix ( )

private

◆ Read()

int GroupIndexSkipScanIterator::Read ( )

overridevirtual

Read a single row.

The row data is not actually returned from the function; it is put in the table's (or tables', in case of a join) record buffer, ie., table->records[0].

Return values

0	OK
-1	End of records
1	Error

Implements RowIterator.

◆ reset_group()

void GroupIndexSkipScanIterator::reset_group ( )

private

◆ update_max_result()

void GroupIndexSkipScanIterator::update_max_result ( bool * reset )

private

◆ update_min_result()

void GroupIndexSkipScanIterator::update_min_result ( bool * reset )

private

Member Data Documentation

◆ cur_infix_range_position

uint GroupIndexSkipScanIterator::cur_infix_range_position[MAX_REF_PARTS]

private

◆ cur_prefix_range_idx

unsigned GroupIndexSkipScanIterator::cur_prefix_range_idx

private

◆ group_key_parts

uint GroupIndexSkipScanIterator::group_key_parts

private

◆ group_prefix

uchar* GroupIndexSkipScanIterator::group_prefix

private

◆ group_prefix_len

const uint GroupIndexSkipScanIterator::group_prefix_len

private

◆ have_agg_distinct

bool GroupIndexSkipScanIterator::have_agg_distinct

private

◆ index

uint GroupIndexSkipScanIterator::index

private

◆ index_info

KEY* GroupIndexSkipScanIterator::index_info

private

◆ is_index_scan

bool GroupIndexSkipScanIterator::is_index_scan

private

◆ key_infix_len

uint GroupIndexSkipScanIterator::key_infix_len

private

◆ key_infix_ranges

const Quick_ranges_array* GroupIndexSkipScanIterator::key_infix_ranges

private

◆ last_prefix

uchar* GroupIndexSkipScanIterator::last_prefix

private

◆ last_prefix_range

QUICK_RANGE* GroupIndexSkipScanIterator::last_prefix_range

private

◆ m_seen_eof

bool GroupIndexSkipScanIterator::m_seen_eof

private

◆ max_functions

const Mem_root_array<Item_sum *>* GroupIndexSkipScanIterator::max_functions

private

◆ max_used_key_length

uint GroupIndexSkipScanIterator::max_used_key_length

private

◆ mem_root

MEM_ROOT* GroupIndexSkipScanIterator::mem_root

private

◆ min_functions

const Mem_root_array<Item_sum *>* GroupIndexSkipScanIterator::min_functions

private

◆ min_max_arg_len

uint GroupIndexSkipScanIterator::min_max_arg_len

private

◆ min_max_arg_part

KEY_PART_INFO* GroupIndexSkipScanIterator::min_max_arg_part

private

◆ min_max_keypart_asc

bool GroupIndexSkipScanIterator::min_max_keypart_asc

private

◆ min_max_ranges

const Quick_ranges* GroupIndexSkipScanIterator::min_max_ranges

private

◆ prefix_ranges

const Quick_ranges* GroupIndexSkipScanIterator::prefix_ranges

private

◆ real_key_parts

uint GroupIndexSkipScanIterator::real_key_parts

private

◆ real_prefix_len

uint GroupIndexSkipScanIterator::real_prefix_len

private

◆ seen_all_infix_ranges

bool GroupIndexSkipScanIterator::seen_all_infix_ranges

private

◆ seen_first_key

bool GroupIndexSkipScanIterator::seen_first_key

private

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

sql/range_optimizer/group_index_skip_scan.h
sql/range_optimizer/group_index_skip_scan.cc

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Constructor & Destructor Documentation

◆ GroupIndexSkipScanIterator()

◆ ~GroupIndexSkipScanIterator()

Member Function Documentation

◆ append_next_infix()

◆ get_next_prefix()

◆ Init()

◆ is_agg_distinct()

◆ next_max()

◆ next_max_in_range()

◆ next_min()

◆ next_min_in_range()

◆ next_prefix()

◆ Read()

◆ reset_group()

◆ update_max_result()

◆ update_min_result()

Member Data Documentation

◆ cur_infix_range_position

◆ cur_prefix_range_idx

◆ group_key_parts

◆ group_prefix

◆ group_prefix_len

◆ have_agg_distinct

◆ index

◆ index_info

◆ is_index_scan

◆ key_infix_len

◆ key_infix_ranges

◆ last_prefix

◆ last_prefix_range

◆ m_seen_eof

◆ max_functions

◆ max_used_key_length

◆ mem_root

◆ min_functions

◆ min_max_arg_len

◆ min_max_arg_part

◆ min_max_keypart_asc

◆ min_max_ranges

◆ prefix_ranges

◆ real_key_parts

◆ real_prefix_len

◆ seen_all_infix_ranges

◆ seen_first_key