cmp_item_scalar Class Reference

cmp_item which stores a scalar (i.e. non-ROW). More...

#include <item_cmpfunc.h>

Inheritance diagram for cmp_item_scalar:

Protected Member Functions
void	set_null_value (bool nv) override

Protected Attributes
bool	m_null_value
	If stored value is NULL. More...

Additional Inherited Members
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 (Item *item)=0
virtual int	cmp (Item *item)=0
virtual int	compare (const cmp_item *item) const =0
virtual cmp_item *	make_same ()=0
virtual void	store_value_by_template (cmp_item *, Item *item)
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...

Detailed Description

cmp_item which stores a scalar (i.e. non-ROW).

Member Function Documentation

set_null_value()

void cmp_item_scalar::set_null_value ( bool  nv )

inlineoverrideprotectedvirtual

Implements cmp_item.

Member Data Documentation

m_null_value

bool cmp_item_scalar::m_null_value

protected

If stored value is NULL.

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

• sql/item_cmpfunc.h