Adding a few warning related protected methods in Field and reducing

some duplicate code.

sql/field.h

@@ -885,14 +885,32 @@ public:
   virtual int set_time() { return 1; }
   bool set_warning(Sql_condition::enum_warning_level, unsigned int code,
                    int cuted_increment) const;
+protected:
+  bool set_warning(unsigned int code, int cuted_increment) const
+  {
+    return set_warning(Sql_condition::WARN_LEVEL_WARN, code, cuted_increment);
+  }
+  bool set_note(unsigned int code, int cuted_increment) const
+  {
+    return set_warning(Sql_condition::WARN_LEVEL_NOTE, code, cuted_increment);
+  }
   void set_datetime_warning(Sql_condition::enum_warning_level, uint code, 
                             const ErrConv *str, timestamp_type ts_type,
                             int cuted_increment);
+  void set_datetime_warning(uint code,
+                            const ErrConv *str, timestamp_type ts_type,
+                            int cuted_increment)
+  {
+    set_datetime_warning(Sql_condition::WARN_LEVEL_WARN, code, str, ts_type,
+                         cuted_increment);
+  }
+  void set_warning_truncated_wrong_value(const char *type, const char *value);
   inline bool check_overflow(int op_result)
   {
     return (op_result == E_DEC_OVERFLOW);
   }
   int warn_if_overflow(int op_result);
+public:
   void set_table_name(String *alias)
   {
     table_name= &alias->Ptr;
@@ -1139,6 +1157,10 @@ class Field_longstr :public Field_str
 protected:
   int report_if_important_data(const char *ptr, const char *end,
                                bool count_spaces);
+  bool check_string_copy_error(const char *well_formed_error_pos,
+                               const char *cannot_convert_error_pos,
+                               const char *end,
+                               CHARSET_INFO *cs);
 public:
   Field_longstr(uchar *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
                 uchar null_bit_arg, utype unireg_check_arg,