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Public Member Functions
Field_double Class Reference
Inheritance diagram for Field_double:
Field_real Field_num Field

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)
Stringval_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_doubleclone (MEM_ROOT *mem_root) const
Field_doubleclone () 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_rootMEM_ROOT to use for memory allocation.
Return values:
NULLIf 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:
NULLIf 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:
buffThe buffer, assumed to be at least length bytes.
lengthNumber of bytes to write.

Implements Field.


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