cmp_item_json Class Reference

#include <item_cmpfunc.h>

Inheritance diagram for cmp_item_json:

Public Member Functions
	cmp_item_json (unique_ptr_destroy_only< Json_wrapper > wrapper, unique_ptr_destroy_only< Json_scalar_holder > holder)
	Construct a cmp_item_json object. More...
	~cmp_item_json () override
int	compare (const cmp_item *ci) const override
void	store_value (Item *item) override
int	cmp (Item *arg) override
cmp_item *	make_same () override
Public Member Functions inherited from cmp_item
	cmp_item ()=default
virtual	~cmp_item ()=default
virtual bool	allocate_value_comparators (MEM_ROOT *mem_root, cmp_item *tmpl, Item *arg)
	Allocate comparator objects for each value object, based on the template comparator objects. More...
virtual void	store_value_by_template (cmp_item *, Item *item)

Private Attributes
unique_ptr_destroy_only< Json_wrapper >	m_value
	Cached JSON value to look up. More...
unique_ptr_destroy_only< Json_scalar_holder >	m_holder
	Cache for the value above. More...
String	m_str_value
	String buffer. More...

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...
Protected Member Functions inherited from cmp_item_scalar
void	set_null_value (bool nv) override
Protected Attributes inherited from cmp_item_scalar
bool	m_null_value
	If stored value is NULL. More...

Constructor & Destructor Documentation

cmp_item_json()

cmp_item_json::cmp_item_json	(	unique_ptr_destroy_only< Json_wrapper >	wrapper,
		unique_ptr_destroy_only< Json_scalar_holder >	holder
	)

Construct a cmp_item_json object.

Parameters

wrapper	a Json_wrapper for holding the JSON value in the comparison
holder	pre-alloced memory for creating JSON scalar values without using the heap

~cmp_item_json()

cmp_item_json::~cmp_item_json ( )

overridedefault

Member Function Documentation

cmp()

int cmp_item_json::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_json::compare ( const cmp_item *  ci ) const

overridevirtual

Implements cmp_item.

make_same()

cmp_item * cmp_item_json::make_same ( )

overridevirtual

Implements cmp_item.

store_value()

void cmp_item_json::store_value ( Item *  item )

overridevirtual

Implements cmp_item.

Member Data Documentation

m_holder

unique_ptr_destroy_only<Json_scalar_holder> cmp_item_json::m_holder

private

Cache for the value above.

m_str_value

String cmp_item_json::m_str_value

private

String buffer.

m_value

unique_ptr_destroy_only<Json_wrapper> cmp_item_json::m_value

private

Cached JSON value to look up.

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

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