basic row Items (SCRUM)

1 files changed, 65 insertions, 0 deletions

diff --git a/sql/item_row.h b/sql/item_row.h
new file mode 100644
index 00000000000..6970b240b31
--- /dev/null
+++ b/sql/item_row.h
@@ -0,0 +1,65 @@
+/* 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 tables;
+  uint arg_count;
+  Item **items;
+public:
+  Item_row(List<Item> &);
+  Item_row(Item_row *item):
+    Item(), array_holder(0), tables(item->tables), 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 tables; };
+  enum Item_result result_type() const { return ROW_RESULT; }
+
+  virtual uint cols() { return arg_count; }
+  virtual Item* el(uint i) { return items[i]; }
+  virtual bool check_cols(uint c);
+};