Inheritance diagram for Field_decimal:

Public Member Functions
	Field_decimal (uchar ptr_arg, uint32 len_arg, uchar null_ptr_arg, uchar null_bit_arg, enum utype unireg_check_arg, const char *field_name_arg, uint8 dec_arg, bool zero_arg, bool unsigned_arg)
enum_field_types	type () const
enum ha_base_keytype	key_type () const
type_conversion_status	reset (void)
type_conversion_status	store (const char to, uint length, const CHARSET_INFO charset)
type_conversion_status	store (double nr)
type_conversion_status	store (longlong nr, bool unsigned_val)
double	val_real (void)
longlong	val_int (void)
String *	val_str (String , String )
int	cmp (const uchar , const uchar )
void	make_sort_key (uchar *buff, uint length)
void	overflow (bool negative)
bool	zero_pack () const
void	sql_type (String &str) const
Field_decimal *	clone (MEM_ROOT *mem_root) const
Field_decimal *	clone () const
virtual const uchar *	unpack (uchar to, const uchar from, uint param_data, bool low_byte_first)
virtual uchar *	pack (uchar to, const uchar from, uint max_length, bool low_byte_first)

Member Function Documentation

Field_decimal* Field_decimal::clone ( MEM_ROOT * mem_root ) const [inline, virtual]

Makes a shallow copy of the Field object.

Note:: This member function must be overridden in all concrete subclasses. Several of the Field subclasses are concrete even though they are not leaf classes, so the compiler will not always catch this.

Parameters:

mem_root MEM_ROOT to use for memory allocation.

Return values:

NULL	If memory allocation failed.

Implements Field.

Field_decimal* Field_decimal::clone ( ) const [inline, virtual]

Makes a shallow copy of the Field object.

Note:: This member function must be overridden in all concrete subclasses. Several of the Field subclasses are concrete even though they are not leaf classes, so the compiler will not always catch this.

Return values:

NULL	If memory allocation failed.

Implements Field.

int Field_decimal::cmp	(	const uchar *	a_ptr,
		const uchar *	b_ptr
	)		`[virtual]`

Should be able to handle at least the following fixed decimal formats: 5.00 , -1.0, 05, -05, +5 with optional pre/end space

Implements Field.

void Field_decimal::make_sort_key	(	uchar *	buff,
		uint	length
	)		`[virtual]`

Writes a copy of the current value in the record buffer, suitable for sorting using byte-by-byte comparison. Integers are always in big-endian regardless of hardware architecture. At most length bytes are written into the buffer.

Parameters:

buff	The buffer, assumed to be at least length bytes.
length	Number of bytes to write.

Implements Field.

virtual uchar* Field_decimal::pack	(	uchar *	to,
		const uchar *	from,
		uint	max_length,
		bool	low_byte_first
	)		`[inline, virtual]`

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Reimplemented from Field_real.

virtual const uchar* Field_decimal::unpack	(	uchar *	to,
		const uchar *	from,
		uint	param_data,
		bool	low_byte_first
	)		`[inline, virtual]`

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Reimplemented from Field_real.

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

Public Member Functions

Member Function Documentation