Inheritance diagram for Arg_comparator:

Collaboration diagram for Arg_comparator:

Public Member Functions
	Arg_comparator (Item a1, Item a2)
int	set_compare_func (Item_result_field *owner, Item_result type)
int	set_compare_func (Item_result_field *owner_arg)
int	set_cmp_func (Item_result_field owner_arg, Item a1, Item *a2, Item_result type)
int	set_cmp_func (Item_result_field owner_arg, Item a1, Item *a2, bool set_null_arg)
int	compare ()
int	compare_string ()
int	compare_binary_string ()
int	compare_real ()
int	compare_decimal ()
int	compare_int_signed ()
int	compare_int_signed_unsigned ()
int	compare_int_unsigned_signed ()
int	compare_int_unsigned ()
int	compare_time_packed ()
int	compare_e_time_packed ()
int	compare_row ()
int	compare_e_string ()
int	compare_e_binary_string ()
int	compare_e_real ()
int	compare_e_decimal ()
int	compare_e_int ()
int	compare_e_int_diff_signedness ()
int	compare_e_row ()
int	compare_real_fixed ()
int	compare_e_real_fixed ()
int	compare_datetime ()
Item **	cache_converted_constant (THD thd, Item value, Item *cache, Item_result type)
void	set_datetime_cmp_func (Item_result_field owner_arg, Item a1, Item *b1)
bool	is_owner_equal_func ()
void	cleanup ()
void	set_cmp_context_for_datetime ()

Static Public Member Functions
static bool	can_compare_as_dates (Item a, Item b, ulonglong *const_val_arg)
Static Public Member Functions inherited from Sql_alloc
static void *	operator new (size_t size) throw ()
static void *	operator new[] (size_t size) throw ()
static void *	operator new[] (size_t size, MEM_ROOT *mem_root) throw ()
static void *	operator new (size_t size, MEM_ROOT *mem_root) throw ()
static void	operator delete (void *ptr, size_t size)
static void	operator delete (void ptr, MEM_ROOT mem_root)
static void	operator delete[] (void ptr, MEM_ROOT mem_root)
static void	operator delete[] (void *ptr, size_t size)

Public Attributes
DTCollation	cmp_collation
String	value1
String	value2

Static Public Attributes
static arg_cmp_func	comparator_matrix [5][2]

Friends
class	Item_func

Detailed Description

Definition at line 34 of file item_cmpfunc.h.

Member Function Documentation

Item ** Arg_comparator::cache_converted_constant	(	THD *	thd_arg,
		Item **	value,
		Item **	cache_item,
		Item_result	type
	)

Convert and cache a constant.

Parameters

value	[in] An item to cache
cache_item	[out] Placeholder for the cache item
type	[in] Comparison type

When given item is a constant and its type differs from comparison type then cache its value to avoid type conversion of this constant on each evaluation. In this case the value is cached and the reference to the cache is returned. Original value is returned otherwise.

Returns: cache item or original value.

Definition at line 1122 of file item_cmpfunc.cc.

int Arg_comparator::compare_binary_string ( )

Compare strings byte by byte. End spaces are also compared.

Return values

<0	a < b
0	b == b
>0	a > b

Definition at line 1396 of file item_cmpfunc.cc.

int Arg_comparator::compare_e_int_diff_signedness ( )

Compare unsigned *a with signed *b or signed *a with unsigned *b.

Definition at line 1718 of file item_cmpfunc.cc.

int Arg_comparator::compare_e_string ( )

Compare strings, but take into account that NULL == NULL.

Definition at line 1422 of file item_cmpfunc.cc.

int Arg_comparator::compare_e_time_packed ( )

Compare arguments using numeric packed representation for '<=>'.

Definition at line 1614 of file item_cmpfunc.cc.

int Arg_comparator::compare_int_signed_unsigned ( )

Compare signed (*a) with unsigned (*B)

Definition at line 1654 of file item_cmpfunc.cc.

int Arg_comparator::compare_int_unsigned ( )

Compare values as BIGINT UNSIGNED.

Definition at line 1629 of file item_cmpfunc.cc.

int Arg_comparator::compare_int_unsigned_signed ( )

Compare unsigned (*a) with signed (*B)

Definition at line 1681 of file item_cmpfunc.cc.

int Arg_comparator::compare_time_packed ( )

Compare arguments using numeric packed temporal representation.

Definition at line 1573 of file item_cmpfunc.cc.

Member Data Documentation

arg_cmp_func Arg_comparator::comparator_matrix

static

Initial value:

{{&Arg_comparator::compare_string,     &Arg_comparator::compare_e_string},
 {&Arg_comparator::compare_real,       &Arg_comparator::compare_e_real},
 {&Arg_comparator::compare_int_signed, &Arg_comparator::compare_e_int},
 {&Arg_comparator::compare_row,        &Arg_comparator::compare_e_row},
 {&Arg_comparator::compare_decimal,    &Arg_comparator::compare_e_decimal}}

Definition at line 113 of file item_cmpfunc.h.

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

<0	a < b
0	b == b
>0	a > b

Public Member Functions

Static Public Member Functions

Public Attributes

Static Public Attributes

Friends

Detailed Description

Member Function Documentation

Member Data Documentation