Inheritance diagram for Item_func_trig_cond:

Public Types
enum	enum_trig_type { IS_NOT_NULL_COMPL, FOUND_MATCH, OUTER_FIELD_IS_NOT_NULL }
Public Member Functions
	Item_func_trig_cond (Item a, bool f, struct st_join_table *tab, enum_trig_type trig_type_arg)
longlong	val_int ()
enum Functype	functype () const
const char *	func_name () const
	'<if>', to distinguish from the if() SQL function
bool	const_item () const
bool *	get_trig_var ()
table_map	used_tables () const
void	print (String *str, enum_query_type query_type)

Member Enumeration Documentation

Enumerator:

IS_NOT_NULL_COMPL	In t1 LEFT JOIN t2, ON can be tested on t2's row only if that row is not NULL-complemented
FOUND_MATCH	In t1 LEFT JOIN t2, the WHERE pushed to t2 can be tested only after at least one t2's row has been found
OUTER_FIELD_IS_NOT_NULL	In IN->EXISTS subquery transformation, new predicates are added: WHERE inner_field=outer_field OR inner_field IS NULL, as well as HAVING inner_field IS NOT NULL, are disabled if outer_field is a NULL value

Constructor & Destructor Documentation

Item_func_trig_cond::Item_func_trig_cond	(	Item *	a,
		bool *	f,
		struct st_join_table *	tab,
		enum_trig_type	trig_type_arg
	)		`[inline]`

Parameters:

a	the item for <condition>
f	pointer to trigger variable
tab	optional table which is source of 'f', NULL if not applicable
trig_type_arg	type of 'f'

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

This method is used for to:

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

Reimplemented from Item_func.

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