SQL: remove unneded return value

sql/field.cc

@@ -4356,12 +4356,11 @@ void Field_longlong::sql_type(String &res) const
   add_zerofill_and_unsigned(res);
 }
 
-bool Field_longlong::set_max()
+void Field_longlong::set_max()
 {
   ASSERT_COLUMN_MARKED_FOR_WRITE_OR_COMPUTED;
   set_notnull();
   int8store(ptr, unsigned_flag ? ULONGLONG_MAX : LONGLONG_MAX);
-  return FALSE;
 }
 
 bool Field_longlong::is_max()
@@ -5444,7 +5443,7 @@ void Field_timestampf::store_TIME(my_time_t timestamp, ulong sec_part)
   my_timestamp_to_binary(&tm, ptr, dec);
 }
 
-bool Field_timestampf::set_max()
+void Field_timestampf::set_max()
 {
   DBUG_ENTER("Field_timestampf::set_max");
   ASSERT_COLUMN_MARKED_FOR_WRITE_OR_COMPUTED;
@@ -5453,7 +5452,7 @@ bool Field_timestampf::set_max()
   mi_int4store(ptr, TIMESTAMP_MAX_VALUE);
   memset(ptr + 4, 0x0, value_length() - 4);
 
-  DBUG_RETURN(FALSE);
+  DBUG_VOID_RETURN;
 }
 
 bool Field_timestampf::is_max()

sql/field.h

@@ -677,8 +677,8 @@ class Field: public Value_source
   /**
      Used by System Versioning.
    */
-  virtual bool set_max()
-  { DBUG_ASSERT(0); return false; }
+  virtual void set_max()
+  { DBUG_ASSERT(0); }
   virtual bool is_max()
   { DBUG_ASSERT(0); return false; }
 
@@ -2129,7 +2129,7 @@ class Field_longlong :public Field_num {
     return unpack_int64(to, from, from_end);
   }
 
-  bool set_max();
+  void set_max();
   bool is_max();
 };
 
@@ -2540,7 +2540,7 @@ class Field_timestampf :public Field_timestamp_with_dec {
   {
     return memcmp(a_ptr, b_ptr, pack_length());
   }
-  bool set_max();
+  void set_max();
   bool is_max();
   void store_TIME(my_time_t timestamp, ulong sec_part);
   my_time_t get_timestamp(const uchar *pos= NULL, ulong *sec_part= NULL) const;

sql/table.cc

@@ -7602,8 +7602,7 @@ void TABLE::vers_update_fields()
 
   if (vers_start_field()->set_time())
     DBUG_ASSERT(0);
-  if (vers_end_field()->set_max())
-    DBUG_ASSERT(0);
+  vers_end_field()->set_max();
 
   DBUG_VOID_RETURN;
 }