Inheritance diagram for Item_func_make_set:

Public Member Functions
	Item_func_make_set (Item *a, List< Item > &list)
String *	val_str (String *str)
bool	fix_fields (THD thd, Item *ref)
void	split_sum_func (THD *thd, Ref_ptr_array ref_pointer_array, List< Item > &fields)
void	fix_length_and_dec ()
void	update_used_tables ()
const char *	func_name () const
bool	walk (Item_processor processor, bool walk_subquery, uchar *arg)
Item *	transform (Item_transformer transformer, uchar *arg)
virtual void	print (String *str, enum_query_type query_type)

Member Function Documentation

void Item_func_make_set::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_func.

void Item_func_make_set::split_sum_func	(	THD *	thd,
		Ref_ptr_array	ref_pointer_array,
		List< Item > &	fields
	)		`[virtual]`

See comments in Item_cmp_func::split_sum_func()

Reimplemented from Item_func.

Item * Item_func_make_set::transform	(	Item_transformer	transformer,
		uchar *	argument
	)		`[virtual]`

Transform an Item_func object with a transformer callback function.

The function recursively applies the transform method to each argument of the Item_func node. If the call of the method for an argument item returns a new item the old item is substituted for a new one. After this the transformer is applied to the root node of the Item_func object.

Parameters:

transformer	the transformer callback function to be applied to the nodes of the tree of the object
argument	parameter to be passed to the transformer

Returns:: Item returned as the result of transformation of the root node

Reimplemented from Item_func.

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

Public Member Functions

Member Function Documentation