Item_func_coalesce Class Reference

Inheritance diagram for Item_func_coalesce:

List of all members.

Public Member Functions
	Item_func_coalesce (List< Item > &list)
double	real_op ()
	Performs the operation that this functions implements when the result type is REAL.
longlong	int_op ()
	Performs the operation that this functions implements when the result type is INT.
String *	str_op (String *)
bool	date_op (MYSQL_TIME *ltime, uint fuzzydate)
	Performs the operation that this functions implements when the result type is MYSQL_TYPE_DATE or MYSQL_TYPE_DATETIME.
bool	time_op (MYSQL_TIME *ltime)
my_decimal *	decimal_op (my_decimal *)
	Performs the operation that this functions implements when the result type is DECIMAL.
void	fix_length_and_dec ()
void	find_num_type ()
enum Item_result	result_type () const
const char *	func_name () const
table_map	not_null_tables () const
enum_field_types	field_type () const
Protected Member Functions
	Item_func_coalesce (Item *a, Item *b)
Protected Attributes
enum_field_types	cached_field_type

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Member Function Documentation

bool Item_func_coalesce::date_op	(	MYSQL_TIME *	ltime,
		uint	fuzzydate
	)		[virtual]

Performs the operation that this functions implements when the result type is MYSQL_TYPE_DATE or MYSQL_TYPE_DATETIME.

Returns:

The result of the operation.

Implements Item_func_numhybrid.

Reimplemented in Item_func_ifnull.

my_decimal * Item_func_coalesce::decimal_op

(

my_decimal *

)

[virtual]

Performs the operation that this functions implements when the result type is DECIMAL.

Parameters:

A	pointer where the DECIMAL value will be allocated.

Returns:

• 0 If the result is NULL
• The same pointer it was given, with the area initialized to the result of the operation.

Implements Item_func_numhybrid.

Reimplemented in Item_func_ifnull.

longlong Item_func_coalesce::int_op

(

)

[virtual]

Performs the operation that this functions implements when the result type is INT.

Returns:

The result of the operation.

Implements Item_func_numhybrid.

Reimplemented in Item_func_ifnull.

double Item_func_coalesce::real_op

(

)

[virtual]

Performs the operation that this functions implements when the result type is REAL.

Returns:

The result of the operation.

Implements Item_func_numhybrid.

Reimplemented in Item_func_ifnull.

String * Item_func_coalesce::str_op

(

String *

str

)

[virtual]

Coalesce - return first not NULL argument.

Implements Item_func_numhybrid.

Reimplemented in Item_func_ifnull.

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

• item_cmpfunc.h
• item_cmpfunc.cc