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    row IN subselects (SCRUM) · a05b0f08
    unknown authored
    mysql-test/r/subselect.result:
      test of row IN subslect
    mysql-test/t/subselect.test:
      test of row IN subslect
    sql/item.cc:
      New helper Item - reference on item list by number
      cache item for row
    sql/item.h:
      layout fixed 
      New helper Item - reference on item list by number
      cache item for row
    sql/item_cmpfunc.cc:
      changed Item_in_optimizer to be able work with row
    sql/item_cmpfunc.h:
      changed Item_in_optimizer to be able work with row
    sql/item_row.cc:
      Fixed row Item to be compatible with row subselect
    sql/item_row.h:
      Fixed row Item to be compatible with row subselect
    sql/item_subselect.cc:
      changed name of class to corerectly reflex its function
      row IN subselect
    sql/item_subselect.h:
      changed name of class to corerectly reflex its function
      row IN subselect
    sql/sql_class.cc:
      changed name of class to corerectly reflex its function
    sql/sql_class.h:
      changed name of class to corerectly reflex its function
    sql/sql_yacc.yy:
      changed name of class to corerectly reflex its function
    a05b0f08
item_row.h 2.13 KB
/* Copyright (C) 2000 MySQL AB

   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; either version 2 of the License, or
   (at your option) any later version.

   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

class Item_row: public Item
{
  bool array_holder;
  table_map used_tables_cache;
  bool const_item_cache;
  uint arg_count;
  Item **items;
public:
  Item_row(List<Item> &);
  Item_row(Item_row *item):
    Item(), array_holder(0), 
    used_tables_cache(item->used_tables_cache),
    const_item_cache(item->const_item_cache),
    arg_count(item->arg_count),
    items(item->items)
  {}

  ~Item_row()
  {
    if(array_holder && items)
      sql_element_free(items);
  }

  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()
  {
    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;
  };
  bool fix_fields(THD *thd, TABLE_LIST *tables, Item **ref);
  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();

  uint cols() { return arg_count; }
  Item* el(uint i) { return items[i]; }
  Item** addr(uint i) { return items + i; }
  bool check_cols(uint c);
  bool null_inside();
  void bring_value();
};