Inheritance diagram for Item_type_holder:

Public Member Functions
	Item_type_holder (THD , Item )
Item_result	result_type () const
enum_field_types	field_type () const
enum Type	type () const
double	val_real ()
longlong	val_int ()
my_decimal *	val_decimal (my_decimal *)
String *	val_str (String *)
bool	get_date (MYSQL_TIME *ltime, uint fuzzydate)
bool	get_time (MYSQL_TIME *ltime)
bool	join_types (THD thd, Item )
Field *	make_field_by_type (TABLE *table)
Field::geometry_type	get_geometry_type () const
Static Public Member Functions
static uint32	display_length (Item *item)
static enum_field_types	get_real_type (Item *)
Protected Member Functions
void	get_full_info (Item *item)
Protected Attributes
TYPELIB *	enum_set_typelib
enum_field_types	fld_type
Field::geometry_type	geometry_type
int	prev_decimal_int_part

Member Function Documentation

uint32 Item_type_holder::display_length ( Item * item ) [static]

Calculate lenth for merging result for given Item type.

Parameters:

item	Item for length detection

void Item_type_holder::get_full_info ( Item * item ) [protected]

Get full information from Item about enum/set fields to be able to create them later.

Parameters:

item	Item for information collection

enum_field_types Item_type_holder::get_real_type ( Item * item ) [static]

Find real field type of item.

bool Item_type_holder::join_types	(	THD *	thd,
		Item *	item
	)

Find field type which can carry current Item_type_holder type and type of given Item.

Parameters:

thd	thread handler
item	given item to join its parameters with this item ones

Return values:

TRUE	error - types are incompatible
FALSE	OK

Field * Item_type_holder::make_field_by_type ( TABLE * table )

Make temporary table field according collected information about type of UNION result.

Parameters:

table temporary table for which we create fields

Item_result Item_type_holder::result_type ( ) const [virtual]

Return expression type of Item_type_holder.

Reimplemented from Item.

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

Public Member Functions