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/*
Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
class Item_row: public Item
{
Item **items;
table_map used_tables_cache, not_null_tables_cache;
uint arg_count;
bool const_item_cache;
bool with_null;
public:
Item_row(List<Item> &);
Item_row(Item_row *item):
Item(),
items(item->items),
used_tables_cache(item->used_tables_cache),
not_null_tables_cache(0),
arg_count(item->arg_count),
const_item_cache(item->const_item_cache),
with_null(0)
{}
enum Type type() const { return ROW_ITEM; };
void illegal_method_call(const char *);
bool is_null() { return null_value; }
void make_field(Send_field *)
{
illegal_method_call((const char*)"make_field");
};
double val_real()
{
illegal_method_call((const char*)"val");
return 0;
};
longlong val_int()
{
illegal_method_call((const char*)"val_int");
return 0;
};
String *val_str(String *)
{
illegal_method_call((const char*)"val_str");
return 0;
};
my_decimal *val_decimal(my_decimal *)
{
illegal_method_call((const char*)"val_decimal");
return 0;
};
bool fix_fields(THD *thd, Item **ref);
void cleanup();
void split_sum_func(THD *thd, Item **ref_pointer_array, List<Item> &fields);
table_map used_tables() const { return used_tables_cache; };
bool const_item() const { return const_item_cache; };
enum Item_result result_type() const { return ROW_RESULT; }
void update_used_tables();
table_map not_null_tables() const { return not_null_tables_cache; }
virtual void print(String *str, enum_query_type query_type);
bool walk(Item_processor processor, bool walk_subquery, uchar *arg);
Item *transform(Item_transformer transformer, uchar *arg);
uint cols() { return arg_count; }
Item* element_index(uint i) { return items[i]; }
Item** addr(uint i) { return items + i; }
bool check_cols(uint c);
bool null_inside() { return with_null; };
void bring_value();
};
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