Field_long Class Reference

Inheritance diagram for Field_long:

List of all members.

Public Member Functions
	Field_long (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)
	Field_long (uint32 len_arg, bool maybe_null_arg, const char *field_name_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)
bool	send_binary (Protocol *protocol)
String *	val_str (String *, String *)
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_long *	clone (MEM_ROOT *mem_root) const
Field_long *	clone () const
virtual uchar *	pack (uchar *to, const uchar *from, uint max_length __attribute__((unused)), bool low_byte_first)
virtual const uchar *	unpack (uchar *to, const uchar *from, uint param_data __attribute__((unused)), bool low_byte_first)
Static Public Attributes
static const int	PACK_LENGTH = 4

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Member Function Documentation

Field_long* Field_long::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_long* Field_long::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_long::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.

type_conversion_status Field_long::store	(	longlong	nr,
		bool	unsigned_val
	)		[virtual]

Store a longlong in the field

Parameters:

nr	the value to store
unsigned_val	whether or not 'nr' should be interpreted as signed or unsigned. E.g., if 'nr' has all bits set it is interpreted as -1 if unsigned_val is false and ULONGLONG_MAX if unsigned_val is true.

Implements Field.

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

• field.h
• field.cc