~drizzle-trunk/drizzle/development

/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-

 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

 *

 *  Copyright (C) 2008 Sun Microsystems

 *

 *  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;

  uint32_t 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),

    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;

  };

  int64_t 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(Session *session, Item **ref);

  void fix_after_pullout(st_select_lex *new_parent, Item **ref);

  void cleanup();

  void split_sum_func(Session *session, 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();

  virtual void print(String *str, enum_query_type query_type);

  bool walk(Item_processor processor, bool walk_subquery, unsigned char *arg);

  Item *transform(Item_transformer transformer, unsigned char *arg);

  uint32_t cols() { return arg_count; }

  Item* element_index(uint32_t i) { return items[i]; }

  Item** addr(uint32_t i) { return items + i; }

  bool check_cols(uint32_t c);

  bool null_inside() { return with_null; };

  void bring_value();

  bool check_vcol_func_processor(unsigned char *int_arg __attribute__((unused)))

  { return false; }

};