Clean up Item_uint() & Item_int()

- Removed val_str() and print() as these are handled by Item_int()
- Use local StringBuffer for Item_int::print() to avoid mallocs

include/my_global.h

@@ -796,6 +796,8 @@ inline unsigned long long my_double2ulonglong(double d)
 #define LONGLONG_MIN	((long long) 0x8000000000000000LL)
 #define LONGLONG_MAX	((long long) 0x7FFFFFFFFFFFFFFFLL)
 #endif
+/* Max length needed for a buffer to hold a longlong or ulonglong + end \0 */
+#define LONGLONG_BUFFER_SIZE 21
 
 #if defined(HAVE_LONG_LONG) && !defined(ULONGLONG_MAX)
 /* First check for ANSI C99 definition: */

sql/item.cc

@@ -3626,9 +3626,10 @@ String *Item_int::val_str(String *str)
 
 void Item_int::print(String *str, enum_query_type query_type)
 {
+  StringBuffer<LONGLONG_BUFFER_SIZE> buf;
   // my_charset_bin is good enough for numbers
-  str_value.set_int(value, unsigned_flag, &my_charset_bin);
-  str->append(str_value);
+  buf.set_int(value, unsigned_flag, &my_charset_bin);
+  str->append(buf);
 }
 
 
@@ -3654,21 +3655,6 @@ Item_uint::Item_uint(THD *thd, const char *str_arg, longlong i, uint length):
 }
 
 
-String *Item_uint::val_str(String *str)
-{
-  str->set((ulonglong) value, collation.collation);
-  return str;
-}
-
-
-void Item_uint::print(String *str, enum_query_type query_type)
-{
-  // latin1 is good enough for numbers
-  str_value.set((ulonglong) value, default_charset());
-  str->append(str_value);
-}
-
-
 Item_decimal::Item_decimal(THD *thd, const char *str_arg, size_t length,
                            CHARSET_INFO *charset):
   Item_num(thd)

sql/item.h

@@ -4238,9 +4238,7 @@ class Item_uint :public Item_int
   Item_uint(THD *thd, ulonglong i): Item_int(thd, i, 10) {}
   Item_uint(THD *thd, const char *str_arg, longlong i, uint length);
   double val_real() { return ulonglong2double((ulonglong)value); }
-  String *val_str(String*);
   Item *clone_item(THD *thd);
-  virtual void print(String *str, enum_query_type query_type);
   Item *neg(THD *thd);
   uint decimal_precision() const { return max_length; }
   Item *get_copy(THD *thd)