Item_func_truth Class Reference

#include <item_cmpfunc.h>

Inheritance diagram for Item_func_truth:

List of all members.

Public Member Functions
virtual bool	val_bool ()
virtual longlong	val_int ()
virtual void	fix_length_and_dec ()
virtual void	print (String *str, enum_query_type query_type)
Protected Member Functions
	Item_func_truth (Item *a, bool a_value, bool a_affirmative)

---

Detailed Description

Abstract Item class, to represent X IS [NOT] (TRUE | FALSE) boolean predicates.

---

Member Function Documentation

void Item_func_truth::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.

bool Item_func_truth::val_bool

(

)

[virtual]

Todo:

Make this functions class dependent

Reimplemented from Item.

---

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

• item_cmpfunc.h
• item_cmpfunc.cc