Item_uint Class Reference

Inheritance diagram for Item_uint:

List of all members.

Public Member Functions
	Item_uint (const char *str_arg, uint length)
	Item_uint (ulonglong i)
	Item_uint (const Name_string &name_arg, longlong i, uint length)
double	val_real ()
String *	val_str (String *)
Item *	clone_item ()
type_conversion_status	save_in_field (Field *field, bool no_conversions)
virtual void	print (String *str, enum_query_type query_type)
Item_num *	neg ()
uint	decimal_precision () const
bool	check_partition_func_processor (uchar *bool_arg)

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Member Function Documentation

void Item_uint::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_int.

type_conversion_status Item_uint::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_int.

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

• item.h
• item.cc