Merged 4.1 into 5.0.

BitKeeper/etc/gone:
  auto-union
BitKeeper/etc/logging_ok:
  auto-union
client/mysql.cc:
  Auto merged
client/mysqltest.c:
  Auto merged
configure.in:
  Auto merged
libmysqld/Makefile.am:
  Auto merged
sql/item.h:
  Auto merged
sql/item_func.h:
  Auto merged
sql/lex.h:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_lex.cc:
  Auto merged
sql/sql_lex.h:
  Auto merged
sql/share/polish/errmsg.txt:
  Auto merged
sql/share/russian/errmsg.txt:
  Auto merged
sql/sql_select.cc:
  Auto merged

1 files changed, 53 insertions, 0 deletions

diff --git a/sql/item.h b/sql/item.h
index 1b5fafc180f..8009439b708 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -123,6 +123,8 @@ public:
   bool set_charset(CHARSET_INFO *cs1, enum coercion co1, 
   		   CHARSET_INFO *cs2, enum coercion co2);
   virtual void set_outer_resolving() {}
+  virtual Item *this_item() { return this; } /* For SPs mostly. */
+  virtual Item *this_const_item() const { return const_cast<Item*>(this); } /* For SPs mostly. */
 
   // Row emulation
   virtual uint cols() { return 1; }
@@ -136,6 +138,57 @@ public:
 };
 
 
+// A local SP variable (incl. parameters), used in runtime
+class Item_splocal : public Item
+{
+private:
+  
+  uint m_offset;
+
+public:
+
+  Item_splocal(uint offset)
+    : m_offset(offset)
+  {}
+
+  Item *this_item();
+  Item *this_const_item() const;
+
+  inline uint get_offset()
+  {
+    return m_offset;
+  }
+
+  // Abstract methods inherited from Item. Just defer the call to
+  // the item in the frame
+  inline enum Type type() const
+  {
+    return this_const_item()->type();
+  }
+
+  inline double val()
+  {
+    return this_item()->val();
+  }
+
+  inline longlong val_int()
+  {
+    return this_item()->val_int();
+  }
+
+  inline String *val_str(String *sp)
+  {
+    return this_item()->val_str(sp);
+  }
+
+  inline void make_field(Send_field *field)
+  {
+    this_item()->make_field(field);
+  }
+
+};
+
+
 class st_select_lex;
 class Item_ident :public Item
 {