Derived_key Class Reference

#include <table.h>

Inheritance diagram for Derived_key:

Collaboration diagram for Derived_key:

Public Attributes
table_map	referenced_by
Field_map	used_fields

Additional Inherited Members
Static Public Member Functions inherited from Sql_alloc
static void *	operator new (size_t size) throw ()
static void *	operator new[] (size_t size) throw ()
static void *	operator new[] (size_t size, MEM_ROOT *mem_root) throw ()
static void *	operator new (size_t size, MEM_ROOT *mem_root) throw ()
static void	operator delete (void *ptr, size_t size)
static void	operator delete (void *ptr, MEM_ROOT *mem_root)
static void	operator delete[] (void *ptr, MEM_ROOT *mem_root)
static void	operator delete[] (void *ptr, size_t size)

Detailed Description

This structure is used to keep info about possible key for the result table of a derived table/view. The 'referenced_by' is the table map of tables to which this possible key corresponds. The 'used_field' is a map of fields of which this key consists of. See also the comment for the TABLE_LIST::update_derived_keys function.

Definition at line 1464 of file table.h.

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

• sql/table.h