QUICK_SELECT_I Class Reference

#include <range_optimizer.h>

Inheritance diagram for QUICK_SELECT_I:

Public Member Functions
	QUICK_SELECT_I ()
	QUICK_SELECT_I (const QUICK_SELECT_I &)=default
virtual	~QUICK_SELECT_I ()=default
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 void	need_sorted_output ()=0
virtual RangeScanType	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[[maybe_unused]])
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[[maybe_unused]])
virtual bool	is_keys_used (const MY_BITMAP *fields)
virtual void	dbug_dump (int indent, bool verbose)=0
virtual QUICK_SELECT_I *	make_reverse (uint used_key_parts_arg[[maybe_unused]])
virtual void	set_handler (handler *file_arg[[maybe_unused]])
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 *	m_table
	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

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 ( )

virtualdefault

Member Function Documentation

add_info_string()

virtual void QUICK_SELECT_I::add_info_string ( String *str]  [[maybe_unused] )

inlinevirtual

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_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_RANGE_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_GROUP_MIN_MAX_SELECT.

dbug_dump()

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

pure virtual

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

get_next()

virtual int QUICK_SELECT_I::get_next ( )

pure virtual

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

get_type()

virtual RangeScanType QUICK_SELECT_I::get_type ( ) const

pure virtual

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

init()

virtual int QUICK_SELECT_I::init ( )

pure virtual

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

init_ror_merged_scan()

virtual int QUICK_SELECT_I::init_ror_merged_scan ( bool reuse_handler]  [[maybe_unused] )

inlinevirtual

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_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_SELECT_DESC, QUICK_RANGE_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_GROUP_MIN_MAX_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_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_SELECT_DESC, QUICK_RANGE_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_GROUP_MIN_MAX_SELECT.

make_reverse()

virtual QUICK_SELECT_I* QUICK_SELECT_I::make_reverse ( uint used_key_parts_arg]  [[maybe_unused] )

inlinevirtual

need_sorted_output()

virtual void QUICK_SELECT_I::need_sorted_output ( )

pure virtual

Implemented in QUICK_SKIP_SCAN_SELECT, QUICK_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_RANGE_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_GROUP_MIN_MAX_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_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_SELECT_DESC, QUICK_RANGE_SELECT, QUICK_INDEX_MERGE_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_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_SELECT_DESC, QUICK_RANGE_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_GROUP_MIN_MAX_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_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_SELECT_DESC, QUICK_RANGE_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_GROUP_MIN_MAX_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]  [[maybe_unused] )

inlinevirtual

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_ROR_UNION_SELECT, QUICK_ROR_INTERSECT_SELECT, QUICK_RANGE_SELECT, QUICK_INDEX_MERGE_SELECT, and QUICK_GROUP_MIN_MAX_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.

index

uint QUICK_SELECT_I::index

last_rowid

uchar* QUICK_SELECT_I::last_rowid

m_table

TABLE* QUICK_SELECT_I::m_table

cost to perform this retrieval

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