Inheritance diagram for Item_func_ifnull:

Public Member Functions
	Item_func_ifnull (Item a, Item b)
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 *str)
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 ()
const char *	func_name () const
Field *	tmp_table_field (TABLE *table)
uint	decimal_precision () const
Protected Attributes
bool	field_type_defined

Member Function Documentation

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

Reimplemented from Item_func_coalesce.

my_decimal * Item_func_ifnull::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.

Reimplemented from Item_func_coalesce.

longlong Item_func_ifnull::int_op ( ) [virtual]

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

Reimplemented from Item_func_coalesce.

double Item_func_ifnull::real_op ( ) [virtual]

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

Reimplemented from Item_func_coalesce.

String * Item_func_ifnull::str_op ( String * str ) [virtual]

Coalesce - return first not NULL argument.

Reimplemented from Item_func_coalesce.

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

Public Member Functions