Inheritance diagram for Field_medium:

Public Member Functions
	Field_medium (uchar ptr_arg, uint32 len_arg, uchar null_ptr_arg, uchar null_bit_arg, enum utype unireg_check_arg, const char *field_name_arg, bool zero_arg, bool unsigned_arg)
enum Item_result	result_type () const
enum_field_types	type () const
enum ha_base_keytype	key_type () const
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)
type_conversion_status	reset (void)
double	val_real (void)
longlong	val_int (void)
String *	val_str (String , String )
bool	send_binary (Protocol *protocol)
int	cmp (const uchar , const uchar )
void	make_sort_key (uchar *buff, uint length)
uint32	pack_length () const
void	sql_type (String &str) const
uint32	max_display_length ()
Field_medium *	clone (MEM_ROOT *mem_root) const
Field_medium *	clone () const
virtual uchar *	pack (uchar to, const uchar from, uint max_length, bool low_byte_first)
virtual const uchar *	unpack (uchar to, const uchar from, uint param_data, bool low_byte_first)

Member Function Documentation

Field_medium* Field_medium::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_medium* Field_medium::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.

void Field_medium::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_medium::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.

virtual const uchar* Field_medium::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.

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

Public Member Functions

Member Function Documentation