Field_double Class Reference

Inheritance diagram for Field_double:

List of all members.

Public Member Functions
	Field_double (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)
	Field_double (uint32 len_arg, bool maybe_null_arg, const char *field_name_arg, uint8 dec_arg)
	Field_double (uint32 len_arg, bool maybe_null_arg, const char *field_name_arg, uint8 dec_arg, my_bool not_fixed_arg)
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
uint	row_pack_length () const
void	sql_type (String &str) const
Field_double *	clone (MEM_ROOT *mem_root) const
Field_double *	clone () const

---

Member Function Documentation

Field_double* Field_double::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_double* Field_double::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_double::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.

---

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

• field.h
• field.cc