Cached_item_str Class Reference

#include <item.h>

Inheritance diagram for Cached_item_str:

Public Member Functions
	Cached_item_str (Item *arg)
bool	cmp () override
	Compare the value associated with the item with the stored value. More...
Public Member Functions inherited from Cached_item
virtual	~Cached_item ()=default
Item *	get_item () const
Item **	get_item_ptr ()

Private Attributes
String	value {"", 0, &my_charset_bin}
String	tmp_value

Additional Inherited Members
Public Attributes inherited from Cached_item
bool	null_value {true}
Protected Member Functions inherited from Cached_item
	Cached_item (Item *i)
Protected Attributes inherited from Cached_item
Item *	item
	The item whose value to cache. More...

Constructor & Destructor Documentation

Cached_item_str()

Cached_item_str::Cached_item_str ( Item *  arg )

inlineexplicit

Member Function Documentation

cmp()

bool Cached_item_str::cmp ( )

overridevirtual

Compare the value associated with the item with the stored value.

If they are different, update the stored value with item's value and return true.

Returns

true if item's value and stored value are different. Notice that first call is to establish an initial value and return value should be ignored.

Implements Cached_item.

Member Data Documentation

tmp_value

String Cached_item_str::tmp_value

private

value

String Cached_item_str::value {"", 0, &my_charset_bin}

private

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

• sql/item.h
• sql/item_buff.cc