Inheritance diagram for Field_new_decimal:

Public Member Functions
	Field_new_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)
	Field_new_decimal (uint32 len_arg, bool maybe_null_arg, const char *field_name_arg, uint8 dec_arg, bool unsigned_arg)
enum_field_types	type () const
enum ha_base_keytype	key_type () const
Item_result	result_type () const
type_conversion_status	reset (void)
type_conversion_status	store_value (const my_decimal *decimal_value)
void	set_value_on_overflow (my_decimal *decimal_value, bool sign)
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	store_time (MYSQL_TIME *ltime, uint8 dec)
type_conversion_status	store_decimal (const my_decimal *)
double	val_real (void)
longlong	val_int (void)
my_decimal *	val_decimal (my_decimal *)
bool	get_date (MYSQL_TIME *ltime, uint fuzzydate)
bool	get_time (MYSQL_TIME *ltime)
String *	val_str (String , String )
int	cmp (const uchar , const uchar )
void	make_sort_key (uchar *buff, uint length)
bool	zero_pack () const
void	sql_type (String &str) const
uint32	max_display_length ()
uint32	pack_length () const
uint	pack_length_from_metadata (uint field_metadata)
uint	row_pack_length () const
bool	compatible_field_size (uint field_metadata, Relay_log_info rli, uint16 mflags, int order_var)
uint	is_equal (Create_field *new_field)
Field_new_decimal *	clone (MEM_ROOT *mem_root) const
Field_new_decimal *	clone () const
virtual const uchar *	unpack (uchar to, const uchar from, uint param_data, bool low_byte_first)
Static Public Member Functions
static Field *	create_from_item (Item *)
Public Attributes
uint	precision
uint	bin_size

Member Function Documentation

Field_new_decimal* Field_new_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_new_decimal* Field_new_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.

bool Field_new_decimal::compatible_field_size	(	uint	field_metadata,
		Relay_log_info *	rli,
		uint16	mflags,
		int *	order_var
	)		`[virtual]`

Check to see if field size is compatible with destination.

This method is used in row-based replication to verify that the slave's field size is less than or equal to the master's field size. The encoded field metadata (from the master or source) is decoded and compared to the size of this field (the slave or destination).

Parameters:

field_metadata	Encoded size in field metadata
order_var	Pointer to variable where the order between the source field and this field will be returned.

Returns:: true

Reimplemented from Field.

uint Field_new_decimal::is_equal ( Create_field * new_field ) [virtual]

Check whether two numeric fields can be considered 'equal' for table alteration purposes. Fields are equal if they are of the same type and retain the same pack length.

Reimplemented from Field_num.

void Field_new_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.

uint Field_new_decimal::pack_length_from_metadata ( uint field_metadata ) [virtual]

Returns the number of bytes field uses in row-based replication row packed size.

This method is used in row-based replication to determine the number of bytes that the field consumes in the row record format. This is used to skip fields in the master that do not exist on the slave.

Parameters:

field_metadata Encoded size in field metadata

Returns:: The size of the field based on the field metadata.

Reimplemented from Field_num.

void Field_new_decimal::set_value_on_overflow	(	my_decimal *	decimal_value,
		bool	sign
	)

Generate max/min decimal value in case of overflow.

Parameters:

decimal_value	buffer for value
sign	sign of value which caused overflow

type_conversion_status Field_new_decimal::store ( double nr ) [virtual]

Todo:: Fix following when double2my_decimal when double2decimal will return E_DEC_TRUNCATED always correctly

Implements Field.

type_conversion_status Field_new_decimal::store_decimal ( const my_decimal * val ) [virtual]

Storing decimal in integer fields.

Parameters:

val	value for storing

Note:: This method is used by all integer fields, real/decimal redefine it

Return values:

TYPE_OK	Storage of value went fine without warnings or errors
!TYPE_OK	Warning/error as indicated by type_conversion_status enum value

Reimplemented from Field_num.

type_conversion_status Field_new_decimal::store_time	(	MYSQL_TIME *	ltime,
		uint8	dec_arg
	)		`[virtual]`

Store MYSQL_TIME value with the given amount of decimal digits into a field.

Note, the "dec" parameter represents number of digits of the Item that previously created the MYSQL_TIME value. It's needed when we store the value into a CHAR/VARCHAR/TEXT field to display the proper amount of fractional digits. For other field types the "dec" value does not matter and is ignored.

Parameters:

ltime	Time, date or datetime value.
dec	Number of decimals in ltime.

Return values:

false	on success
true	on error

This is called when storing a date in a string.

Note:: Needs to be changed if/when we want to support different time formats.

Reimplemented from Field_num.

type_conversion_status Field_new_decimal::store_value ( const my_decimal * decimal_value )

Store decimal value in the binary buffer.

Checks if decimal_value fits into field size. If it does, stores the decimal in the buffer using binary format. Otherwise sets maximal number that can be stored in the field.

Parameters:

decimal_value my_decimal

Return values:

0	ok
1	error

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

Unpack a decimal field from row data.

This method is used to unpack a decimal or numeric field from a master whose size of the field is less than that of the slave.

Parameters:

to	Destination of the data
from	Source of the data
param_data	Precision (upper) and decimal (lower) values

Returns:: New pointer into memory based on from + length of the data

Reimplemented from Field.

my_decimal * Field_new_decimal::val_decimal ( my_decimal * decimal_value ) [virtual]

Return decimal value of integer field.

Parameters:

decimal_value buffer for storing decimal value

Note:: This method is used by all integer fields, real/decimal redefine it. All longlong values fit in our decimal buffer which cal store 8*9=72 digits of integer number

Returns:: pointer to decimal buffer with value of field

Reimplemented from Field_num.

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

Public Member Functions

Static Public Member Functions

Public Attributes

Member Function Documentation