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MySQL 5.1: store_key_item Class Reference

store_key_item Class Reference

#include <sql_select.h>

Inheritance diagram for store_key_item:

[legend]Collaboration diagram for store_key_item:

[legend]List of all members.


Public Member Functions
	store_key_item (THD thd, Field to_field_arg, char ptr, char null_ptr_arg, uint length, Item *item_arg)
enum store_key_result	copy ()
const char *	name () const
Protected Attributes
Item *	item

Detailed Description

Definition at line 520 of file sql_select.h.

Constructor & Destructor Documentation

store_key_item::store_key_item	(	THD *	thd,
		Field *	to_field_arg,
		char *	ptr,
		char *	null_ptr_arg,
		uint	length,
		Item *	item_arg
	)			`[inline]`

Definition at line 525 of file sql_select.h.

00527     :store_key(thd, to_field_arg,ptr,
00528                null_ptr_arg ? null_ptr_arg : item_arg->maybe_null ?
00529                &err : NullS, length), item(item_arg)
00530   {}

Member Function Documentation

enum store_key_result store_key_item::copy ( ) [inline, virtual]

Implements store_key.

Reimplemented in store_key_const_item.

Definition at line 531 of file sql_select.h.

References dbug_tmp_restore_column_map(), dbug_tmp_use_all_columns(), store_key::err, item, Item::save_in_field(), store_key::STORE_KEY_FATAL, Field::table, store_key::to_field, and st_table::write_set.

00532   {
00533     TABLE *table= to_field->table;
00534     my_bitmap_map *old_map= dbug_tmp_use_all_columns(table,
00535                                                      table->write_set);
00536     int res= item->save_in_field(to_field, 1);
00537     dbug_tmp_restore_column_map(table->write_set, old_map);
00538     return (err != 0 || res > 2 ? STORE_KEY_FATAL : (store_key_result) res); 
00539                          
00540   }