Comp_creator Class Reference

Abstract factory interface for creating comparison predicates. More...

#include <item_cmpfunc.h>

Inheritance diagram for Comp_creator:

Public Member Functions
virtual	~Comp_creator ()=default
virtual Item_bool_func *	create (const POS &pos, Item *a, Item *b) const =0
virtual const char *	symbol (bool invert) const =0
	This interface is only used by Item_allany_subselect. More...
virtual bool	eqne_op () const =0
virtual bool	l_op () const =0

Detailed Description

Abstract factory interface for creating comparison predicates.

Constructor & Destructor Documentation

~Comp_creator()

virtual Comp_creator::~Comp_creator ( )

virtualdefault

Member Function Documentation

create()

virtual Item_bool_func * Comp_creator::create ( const POS &  pos, Item *  a, Item *  b  ) const

pure virtual

Implemented in Linear_comp_creator, Gt_creator, Lt_creator, Ge_creator, and Le_creator.

eqne_op()

virtual bool Comp_creator::eqne_op ( ) const

pure virtual

Returns

true for operators =, <> and <=>, otherwise false.

Implemented in Linear_comp_creator, Gt_creator, Lt_creator, Ge_creator, and Le_creator.

l_op()

virtual bool Comp_creator::l_op ( ) const

pure virtual

Returns

true for operators < and <=, otherwise false.

Implemented in Linear_comp_creator, Gt_creator, Lt_creator, Ge_creator, and Le_creator.

symbol()

virtual const char * Comp_creator::symbol ( bool  invert ) const

pure virtual

This interface is only used by Item_allany_subselect.

Implemented in Eq_creator, Equal_creator, Ne_creator, Gt_creator, Lt_creator, Ge_creator, and Le_creator.

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

• sql/item_cmpfunc.h