range_optimizer.h File Reference

#include <assert.h>
#include <sys/types.h>
#include <algorithm>
#include "my_base.h"
#include "my_inttypes.h"
#include "my_table_map.h"
#include "prealloced_array.h"
#include "sql/field.h"
#include "sql/handler.h"
#include "sql/item_func.h"
#include "sql/iterators/row_iterator.h"
#include "sql/key_spec.h"
#include "sql/malloc_allocator.h"
#include "sql/sql_bitmap.h"
#include "sql/sql_const.h"
#include "sql_string.h"

Go to the source code of this file.

Classes
struct	KEY_PART
class	QUICK_RANGE

Typedefs
using	Quick_ranges = Mem_root_array< QUICK_RANGE * >
using	Quick_ranges_array = Mem_root_array< Quick_ranges * >

Functions
bool	setup_range_optimizer_param (THD *thd, MEM_ROOT *return_mem_root, MEM_ROOT *temp_mem_root, Key_map keys_to_use, TABLE *table, Query_block *query_block, RANGE_OPT_PARAM *param)
int	test_quick_select (THD *thd, MEM_ROOT *return_mem_root, MEM_ROOT *temp_mem_root, Key_map keys_to_use, table_map prev_tables, table_map read_tables, ha_rows limit, bool force_quick_range, const enum_order interesting_order, TABLE *table, bool skip_records_in_range, Item *cond, Key_map *needed_reg, bool ignore_table_scan, Query_block *query_block, AccessPath **path)
void	store_key_image_to_rec (Field *field, uchar *ptr, uint len)
void	range_optimizer_init ()
	Global initialization of the null_element. Call on server start. More...
void	range_optimizer_free ()
	Global destruction of the null_element. Call on server stop. More...
bool	comparable_in_index (Item *cond_func, const Field *field, const Field::imagetype itype, Item_func::Functype comp_type, const Item *value)
	Test if 'value' is comparable to 'field' when setting up range access for predicate "field OP value". More...
void	trace_quick_description (const AccessPath *path, Opt_trace_context *trace)

Variables
String	null_string

Typedef Documentation

Quick_ranges

using Quick_ranges = Mem_root_array<QUICK_RANGE *>

Quick_ranges_array

using Quick_ranges_array = Mem_root_array<Quick_ranges *>

Function Documentation

comparable_in_index()

bool comparable_in_index	(	Item *	cond_func,
		const Field *	field,
		const Field::imagetype	itype,
		Item_func::Functype	comp_type,
		const Item *	value
	)

Test if 'value' is comparable to 'field' when setting up range access for predicate "field OP value".

'field' is a field in the table being optimized for while 'value' is whatever 'field' is compared to.

Parameters

cond_func	the predicate item that compares 'field' with 'value'
field	field in the predicate
itype	itMBR if indexed field is spatial, itRAW otherwise
comp_type	comparator for the predicate
value	whatever 'field' is compared to

Returns

true if 'field' and 'value' are comparable, false otherwise

range_optimizer_free()

void range_optimizer_free

(

)

Global destruction of the null_element. Call on server stop.

range_optimizer_init()

void range_optimizer_init

(

)

Global initialization of the null_element. Call on server start.

setup_range_optimizer_param()

bool setup_range_optimizer_param	(	THD *	thd,
		MEM_ROOT *	return_mem_root,
		MEM_ROOT *	temp_mem_root,
		Key_map	keys_to_use,
		TABLE *	table,
		Query_block *	query_block,
		RANGE_OPT_PARAM *	param
	)

store_key_image_to_rec()

void store_key_image_to_rec	(	Field *	field,
		uchar *	ptr,
		uint	len
	)

test_quick_select()

int test_quick_select	(	THD *	thd,
		MEM_ROOT *	return_mem_root,
		MEM_ROOT *	temp_mem_root,
		Key_map	keys_to_use,
		table_map	prev_tables,
		table_map	read_tables,
		ha_rows	limit,
		bool	force_quick_range,
		const enum_order	interesting_order,
		TABLE *	table,
		bool	skip_records_in_range,
		Item *	cond,
		Key_map *	needed_reg,
		bool	ignore_table_scan,
		Query_block *	query_block,
		AccessPath **	path
	)

trace_quick_description()

void trace_quick_description	(	const AccessPath *	path,
		Opt_trace_context *	trace
	)

Variable Documentation

null_string

String null_string

extern