#include <opt_range.h>

Inheritance diagram for QUICK_SELECT_I:

Public Types
enum	{ QS_TYPE_RANGE = 0 , QS_TYPE_INDEX_MERGE = 1 , QS_TYPE_RANGE_DESC = 2 , QS_TYPE_FULLTEXT = 3 , QS_TYPE_ROR_INTERSECT = 4 , QS_TYPE_ROR_UNION = 5 , QS_TYPE_GROUP_MIN_MAX = 6 , QS_TYPE_SKIP_SCAN = 7 }

Public Member Functions
	QUICK_SELECT_I ()

	QUICK_SELECT_I (const QUICK_SELECT_I &)=default

virtual	~QUICK_SELECT_I ()

virtual int	init ()=0

virtual int	reset (void)=0

virtual int	get_next ()=0

virtual void	range_end ()

virtual bool	reverse_sorted () const =0
	Whether the range access method returns records in reverse order. More...

virtual bool	reverse_sort_possible () const =0
	Whether the range access method is capable of returning records in reverse order. More...

virtual bool	unique_key_range ()

virtual bool	clustered_pk_range ()

virtual void	need_sorted_output ()=0

virtual int	get_type () const =0

virtual bool	is_loose_index_scan () const =0

virtual bool	is_agg_loose_index_scan () const =0

virtual int	init_ror_merged_scan (bool reuse_handler)

virtual void	save_last_pos ()

virtual void	add_keys_and_lengths (String key_names, String used_lengths)=0

virtual void	add_info_string (String *str)

virtual bool	is_keys_used (const MY_BITMAP *fields)

virtual bool	is_valid ()
	Simple sanity check that the quick select has been set up correctly. More...

virtual void	dbug_dump (int indent, bool verbose)=0

virtual QUICK_SELECT_I *	make_reverse (uint used_key_parts_arg)

virtual void	set_handler (handler *file_arg)

virtual void	get_fields_used (MY_BITMAP *used_fields)=0
	Get the fields used by the range access method. More...

void	trace_quick_description (Opt_trace_context *trace)

Public Attributes
ha_rows	records

Cost_estimate	cost_est

TABLE *	head
	cost to perform this retrieval More...

uint	index

uint	max_used_key_length

uint	used_key_parts

bool	forced_by_hint
	true if creation of the object is forced by the hint. More...

uchar *	last_rowid

uchar *	record

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

Enumerator
QS_TYPE_RANGE
QS_TYPE_INDEX_MERGE
QS_TYPE_RANGE_DESC
QS_TYPE_FULLTEXT
QS_TYPE_ROR_INTERSECT
QS_TYPE_ROR_UNION
QS_TYPE_GROUP_MIN_MAX
QS_TYPE_SKIP_SCAN

Constructor & Destructor Documentation

◆ QUICK_SELECT_I() [1/2]

QUICK_SELECT_I::QUICK_SELECT_I ( )

◆ QUICK_SELECT_I() [2/2]

QUICK_SELECT_I::QUICK_SELECT_I ( const QUICK_SELECT_I & )

default

◆ ~QUICK_SELECT_I()

virtual QUICK_SELECT_I::~QUICK_SELECT_I ( )

inlinevirtual

Member Function Documentation

◆ add_info_string()

virtual void QUICK_SELECT_I::add_info_string ( String * str )

inlinevirtual

Reimplemented in QUICK_SKIP_SCAN_SELECT, QUICK_GROUP_MIN_MAX_SELECT, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_RANGE_SELECT.

◆ add_keys_and_lengths()

virtual void QUICK_SELECT_I::add_keys_and_lengths	(	String *	key_names,
		String *	used_lengths
	)

pure virtual

Implemented in QUICK_SKIP_SCAN_SELECT, QUICK_GROUP_MIN_MAX_SELECT, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_RANGE_SELECT.

◆ clustered_pk_range()

virtual bool QUICK_SELECT_I::clustered_pk_range ( )

inlinevirtual

Reimplemented in QUICK_INDEX_MERGE_SELECT.

◆ dbug_dump()

virtual void QUICK_SELECT_I::dbug_dump	(	int	indent,
		bool	verbose
	)

pure virtual

Implemented in QUICK_SKIP_SCAN_SELECT, QUICK_GROUP_MIN_MAX_SELECT, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_RANGE_SELECT.

◆ get_fields_used()

virtual void QUICK_SELECT_I::get_fields_used ( MY_BITMAP * used_fields )

pure virtual

Get the fields used by the range access method.

Parameters

[out] used_fields Bitmap of fields that this range access method uses.

Implemented in QUICK_SKIP_SCAN_SELECT, QUICK_GROUP_MIN_MAX_SELECT, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_RANGE_SELECT.

◆ get_next()

virtual int QUICK_SELECT_I::get_next ( )

pure virtual

Implemented in QUICK_SKIP_SCAN_SELECT, QUICK_SELECT_DESC, QUICK_GROUP_MIN_MAX_SELECT, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_INDEX_MERGE_SELECT, QUICK_RANGE_SELECT_GEOM, and QUICK_RANGE_SELECT.

◆ get_type()

virtual int QUICK_SELECT_I::get_type ( ) const

pure virtual

Implemented in QUICK_SKIP_SCAN_SELECT, QUICK_SELECT_DESC, QUICK_GROUP_MIN_MAX_SELECT, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_RANGE_SELECT.

◆ init()

virtual int QUICK_SELECT_I::init ( )

pure virtual

Implemented in QUICK_SKIP_SCAN_SELECT, QUICK_GROUP_MIN_MAX_SELECT, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_RANGE_SELECT.

◆ init_ror_merged_scan()

virtual int QUICK_SELECT_I::init_ror_merged_scan ( bool reuse_handler )

inlinevirtual

Reimplemented in QUICK_ROR_INTERSECT_SELECT, and QUICK_RANGE_SELECT.

◆ is_agg_loose_index_scan()

virtual bool QUICK_SELECT_I::is_agg_loose_index_scan ( ) const

pure virtual

Implemented in QUICK_SKIP_SCAN_SELECT, QUICK_SELECT_DESC, QUICK_GROUP_MIN_MAX_SELECT, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_RANGE_SELECT.

◆ is_keys_used()

bool QUICK_SELECT_I::is_keys_used ( const MY_BITMAP * fields )

virtual

Reimplemented in QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, and QUICK_INDEX_MERGE_SELECT.

◆ is_loose_index_scan()

virtual bool QUICK_SELECT_I::is_loose_index_scan ( ) const

pure virtual

Implemented in QUICK_SKIP_SCAN_SELECT, QUICK_SELECT_DESC, QUICK_GROUP_MIN_MAX_SELECT, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_RANGE_SELECT.

◆ is_valid()

virtual bool QUICK_SELECT_I::is_valid ( )

inlinevirtual

Simple sanity check that the quick select has been set up correctly.

Function is overridden by quick selects that merge indices.

Reimplemented in QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, and QUICK_INDEX_MERGE_SELECT.

◆ make_reverse()

virtual QUICK_SELECT_I* QUICK_SELECT_I::make_reverse ( uint used_key_parts_arg )

inlinevirtual

Reimplemented in QUICK_SELECT_DESC, and QUICK_RANGE_SELECT.

◆ need_sorted_output()

virtual void QUICK_SELECT_I::need_sorted_output ( )

pure virtual

Implemented in QUICK_SKIP_SCAN_SELECT, QUICK_GROUP_MIN_MAX_SELECT, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_RANGE_SELECT.

◆ range_end()

virtual void QUICK_SELECT_I::range_end ( )

inlinevirtual

Reimplemented in QUICK_RANGE_SELECT.

◆ reset()

virtual int QUICK_SELECT_I::reset ( void )

pure virtual

Implemented in QUICK_SELECT_DESC, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_INDEX_MERGE_SELECT, QUICK_RANGE_SELECT, QUICK_SKIP_SCAN_SELECT, and QUICK_GROUP_MIN_MAX_SELECT.

◆ reverse_sort_possible()

virtual bool QUICK_SELECT_I::reverse_sort_possible ( ) const

pure virtual

Whether the range access method is capable of returning records in reverse order.

Implemented in QUICK_SKIP_SCAN_SELECT, QUICK_SELECT_DESC, QUICK_GROUP_MIN_MAX_SELECT, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_RANGE_SELECT.

◆ reverse_sorted()

virtual bool QUICK_SELECT_I::reverse_sorted ( ) const

pure virtual

Whether the range access method returns records in reverse order.

Implemented in QUICK_SKIP_SCAN_SELECT, QUICK_SELECT_DESC, QUICK_GROUP_MIN_MAX_SELECT, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_RANGE_SELECT.

◆ save_last_pos()

virtual void QUICK_SELECT_I::save_last_pos ( )

inlinevirtual

Reimplemented in QUICK_RANGE_SELECT.

◆ set_handler()

virtual void QUICK_SELECT_I::set_handler ( handler * file_arg )

inlinevirtual

Reimplemented in QUICK_RANGE_SELECT.

◆ trace_quick_description()

void QUICK_SELECT_I::trace_quick_description ( Opt_trace_context * trace )

◆ unique_key_range()

virtual bool QUICK_SELECT_I::unique_key_range ( )

inlinevirtual

Reimplemented in QUICK_SKIP_SCAN_SELECT, QUICK_GROUP_MIN_MAX_SELECT, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_RANGE_SELECT.

Member Data Documentation

◆ cost_est

Cost_estimate QUICK_SELECT_I::cost_est

◆ forced_by_hint

bool QUICK_SELECT_I::forced_by_hint

true if creation of the object is forced by the hint.

The flag is used to skip ref evaluation in find_best_ref() function. It also enables using of QUICK_SELECT object in Optimize_table_order::best_access_path() regardless of the evaluation cost.

◆ head

TABLE* QUICK_SELECT_I::head

cost to perform this retrieval

◆ index

uint QUICK_SELECT_I::index

◆ last_rowid

uchar* QUICK_SELECT_I::last_rowid

◆ max_used_key_length

uint QUICK_SELECT_I::max_used_key_length

◆ record

uchar* QUICK_SELECT_I::record

◆ records

ha_rows QUICK_SELECT_I::records

◆ used_key_parts

uint QUICK_SELECT_I::used_key_parts

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

sql/opt_range.h
sql/opt_range.cc

Public Types

Public Member Functions

Public Attributes

Member Enumeration Documentation

◆ anonymous enum

Constructor & Destructor Documentation

◆ QUICK_SELECT_I() [1/2]

◆ QUICK_SELECT_I() [2/2]

◆ ~QUICK_SELECT_I()

Member Function Documentation

◆ add_info_string()

◆ add_keys_and_lengths()

◆ clustered_pk_range()

◆ dbug_dump()

◆ get_fields_used()

◆ get_next()

◆ get_type()

◆ init()

◆ init_ror_merged_scan()

◆ is_agg_loose_index_scan()

◆ is_keys_used()

◆ is_loose_index_scan()

◆ is_valid()

◆ make_reverse()

◆ need_sorted_output()

◆ range_end()

◆ reset()

◆ reverse_sort_possible()

◆ reverse_sorted()

◆ save_last_pos()

◆ set_handler()

◆ trace_quick_description()

◆ unique_key_range()

Member Data Documentation

◆ cost_est

◆ forced_by_hint

◆ head

◆ index

◆ last_rowid

◆ max_used_key_length

◆ record

◆ records

◆ used_key_parts