cmp_item_row Class Reference

#include <item_cmpfunc.h>

Inheritance diagram for cmp_item_row:

Public Member Functions
	cmp_item_row ()=default
	cmp_item_row (THD *thd, Item *item)
	~cmp_item_row () override
	cmp_item_row (cmp_item_row &&other)
bool	allocate_value_comparators (MEM_ROOT *mem_root, cmp_item *tmpl, Item *arg) override
	Allocate comparator objects for each value object, based on the template comparator objects. More...
void	store_value (Item *item) override
int	cmp (Item *arg) override
int	compare (const cmp_item *arg) const override
cmp_item *	make_same () override
void	store_value_by_template (cmp_item *tmpl, Item *) override
void	set_null_value (bool nv) override
Public Member Functions inherited from cmp_item
	cmp_item ()=default
virtual	~cmp_item ()=default

Private Member Functions
bool	allocate_template_comparators (THD *thd, Item *item)
	Allocate comparator objects for the LHS argument to IN, used as template for the value comparators. More...

Private Attributes
cmp_item **	comparators {nullptr}
uint	n {0}

Additional Inherited Members
Static Public Member Functions inherited from cmp_item
static cmp_item *	new_comparator (THD *thd, Item_result result_type, Item *item, const CHARSET_INFO *cs)
	Create an appropriate comparator for the given type. More...

Constructor & Destructor Documentation

cmp_item_row() [1/3]

cmp_item_row::cmp_item_row ( )

default

cmp_item_row() [2/3]

cmp_item_row::cmp_item_row ( THD *  thd, Item *  item  )

inline

~cmp_item_row()

cmp_item_row::~cmp_item_row ( )

override

cmp_item_row() [3/3]

cmp_item_row::cmp_item_row ( cmp_item_row &&  other )

inline

Member Function Documentation

allocate_template_comparators()

bool cmp_item_row::allocate_template_comparators ( THD *  thd, Item *  item  )

private

Allocate comparator objects for the LHS argument to IN, used as template for the value comparators.

Parameters

thd	Session handle
item	Item to allocate comparator objects for, left-hand IN operand

Returns

false if success, true if error.

allocate_value_comparators()

bool cmp_item_row::allocate_value_comparators ( MEM_ROOT *  mem_root, cmp_item *  tmpl, Item *  arg  )

overridevirtual

Allocate comparator objects for each value object, based on the template comparator objects.

Only implemented for derived class cmp_item_row.

Parameters

mem_root	mem_root for allocation.
tmpl	The template item object.
arg	The value item.

Returns

false if success, true if error.

Reimplemented from cmp_item.

cmp()

int cmp_item_row::cmp ( Item *  item )

overridevirtual

Returns

result (true, false or UNKNOWN) of "stored argument's value <> item's value"

Implements cmp_item.

compare()

int cmp_item_row::compare ( const cmp_item *  arg ) const

overridevirtual

Implements cmp_item.

make_same()

cmp_item * cmp_item_row::make_same ( )

overridevirtual

Implements cmp_item.

set_null_value()

void cmp_item_row::set_null_value ( bool  nv )

inlineoverridevirtual

Implements cmp_item.

store_value()

void cmp_item_row::store_value ( Item *  item )

overridevirtual

Implements cmp_item.

store_value_by_template()

void cmp_item_row::store_value_by_template ( cmp_item *  tmpl, Item *  item  )

overridevirtual

Reimplemented from cmp_item.

Member Data Documentation

comparators

cmp_item** cmp_item_row::comparators {nullptr}

private

n

uint cmp_item_row::n {0}

private

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

• sql/item_cmpfunc.h
• sql/item_cmpfunc.cc