Item_int Class Reference

Inheritance diagram for Item_int:

List of all members.

Public Member Functions
	Item_int (int32 i, uint length=MY_INT32_NUM_DECIMAL_DIGITS)
	Item_int (longlong i, uint length=MY_INT64_NUM_DECIMAL_DIGITS)
	Item_int (ulonglong i, uint length=MY_INT64_NUM_DECIMAL_DIGITS)
	Item_int (Item_int *item_arg)
	Item_int (const Name_string &name_arg, longlong i, uint length)
	Item_int (const char *str_arg, uint length)
enum Type	type () const
enum Item_result	result_type () const
enum_field_types	field_type () const
longlong	val_int ()
double	val_real ()
my_decimal *	val_decimal (my_decimal *)
String *	val_str (String *)
bool	get_date (MYSQL_TIME *ltime, uint fuzzydate)
bool	get_time (MYSQL_TIME *ltime)
type_conversion_status	save_in_field (Field *field, bool no_conversions)
bool	basic_const_item () const
Item *	clone_item ()
virtual void	print (String *str, enum_query_type query_type)
Item_num *	neg ()
uint	decimal_precision () const
bool	eq (const Item *, bool binary_cmp) const
bool	check_partition_func_processor (uchar *bool_arg)
Public Attributes
longlong	value

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Constructor & Destructor Documentation

Item_int::Item_int	(	const char *	str_arg,
		uint	length
	)

Create an item from a string we KNOW points to a valid longlong. str_arg does not necessary has to be a \0 terminated string. This is always 'signed'. Unsigned values are created with Item_uint()

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Member Function Documentation

bool Item_int::eq	(	const Item *	item,
		bool	binary_cmp
	)		const [virtual]

This function is called when:

• Comparing items in the WHERE clause (when doing where optimization)
• When trying to find an ORDER BY/GROUP BY item in the SELECT part
• When matching fields in multiple equality objects (Item_equal)

Reimplemented from Item.

void Item_int::print	(	String *	str,
		enum_query_type	query_type
	)		[virtual]

This method is used for to:

• to generate a view definition query (SELECT-statement);
• to generate a SQL-query for EXPLAIN EXTENDED;
• to generate a SQL-query to be shown in INFORMATION_SCHEMA;
• debug.

For more information about view definition query, INFORMATION_SCHEMA query and why they should be generated from the Item-tree,

See also:

mysql_register_view().

Reimplemented from Item.

Reimplemented in Item_temporal_with_ref, and Item_uint.

type_conversion_status Item_int::save_in_field	(	Field *	field,
		bool	no_conversions
	)		[virtual]

Store this item's int-value in a field

Parameters:

field	The field where the int value is to be stored
no_conversions	Only applies if the value to store is NULL (null_value is true) and NULL is not allowed in field. In that case: if no_coversion is true, do nothing and return with error TYPE_ERR_NULL_CONSTRAINT_VIOLATION. If no_coversion is false, the field's default value is stored if one exists. Otherwise an error is returned.

Return values:

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

Reimplemented from Item.

Reimplemented in Item_int_with_ref, Item_uint, and Item_temporal.

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

• item.h
• item.cc