1 files changed, 15 insertions, 15 deletions

diff --git a/sql/sql_class.h b/sql/sql_class.h
index 42e6aea2aa8..6fa8d696b53 100644
--- a/sql/sql_class.h
+++ b/sql/sql_class.h
@@ -396,7 +396,7 @@ public:
     invisible(false)
   {}
   Key(const Key &rhs, MEM_ROOT *mem_root);
-  virtual ~Key() {}
+  virtual ~Key() = default;
   /* Equality comparison of keys (ignoring name) */
   friend bool foreign_key_prefix(Key *a, Key *b);
   /**
@@ -1096,7 +1096,7 @@ public:
   Query_arena() { INIT_ARENA_DBUG_INFO; }
 
   virtual Type type() const;
-  virtual ~Query_arena() {};
+  virtual ~Query_arena() = default;
 
   inline bool is_stmt_prepare() const { return state == STMT_INITIALIZED; }
   inline bool is_stmt_prepare_or_first_sp_execute() const
@@ -1147,7 +1147,7 @@ public:
   Query_arena_memroot() : Query_arena()
   {}
 
-  virtual ~Query_arena_memroot() {}
+  virtual ~Query_arena_memroot() = default;
 };
 
 
@@ -1263,7 +1263,7 @@ public:
   my_bool query_cache_is_applicable;
 
   /* This constructor is called for backup statements */
-  Statement() {}
+  Statement() = default;
 
   Statement(LEX *lex_arg, MEM_ROOT *mem_root_arg,
             enum enum_state state_arg, ulong id_arg);
@@ -1349,7 +1349,7 @@ struct st_savepoint {
 
 class Security_context {
 public:
-  Security_context() {}                       /* Remove gcc warning */
+  Security_context() = default;                       /* Remove gcc warning */
   /*
     host - host of the client
     user - user of the client, set to NULL until the user has been read from
@@ -1768,7 +1768,7 @@ protected:
     m_prev_internal_handler(NULL)
   {}
 
-  virtual ~Internal_error_handler() {}
+  virtual ~Internal_error_handler() = default;
 
 public:
   /**
@@ -1826,7 +1826,7 @@ public:
     /* Ignore error */
     return TRUE;
   }
-  Dummy_error_handler() {}                    /* Remove gcc warning */
+  Dummy_error_handler() = default;                    /* Remove gcc warning */
 };
 
 
@@ -1863,7 +1863,7 @@ public:
 class Drop_table_error_handler : public Internal_error_handler
 {
 public:
-  Drop_table_error_handler() {}
+  Drop_table_error_handler() = default;
 
 public:
   bool handle_condition(THD *thd,
@@ -5232,7 +5232,7 @@ public:
     example for a duplicate row entry written to a temp table.
   */
   virtual int send_data(List<Item> &items)=0;
-  virtual ~select_result_sink() {};
+  virtual ~select_result_sink() = default;
   void reset(THD *thd_arg) { thd= thd_arg; }
 };
 
@@ -5264,7 +5264,7 @@ public:
   ha_rows est_records;  /* estimated number of records in the result */
  select_result(THD *thd_arg): select_result_sink(thd_arg), est_records(0) {}
   void set_unit(SELECT_LEX_UNIT *unit_arg) { unit= unit_arg; }
-  virtual ~select_result() {};
+  virtual ~select_result() = default;
   /**
     Change wrapped select_result.
 
@@ -6313,7 +6313,7 @@ class user_var_entry
 {
   CHARSET_INFO *m_charset;
  public:
-  user_var_entry() {}                         /* Remove gcc warning */
+  user_var_entry() = default;                         /* Remove gcc warning */
   LEX_CSTRING name;
   char *value;
   size_t length;
@@ -6434,7 +6434,7 @@ public:
   enum type { SESSION_VAR, LOCAL_VAR, PARAM_VAR };
   type scope;
   my_var(const LEX_CSTRING *j, enum type s) : name(*j), scope(s) { }
-  virtual ~my_var() {}
+  virtual ~my_var() = default;
   virtual bool set(THD *thd, Item *val) = 0;
   virtual my_var_sp *get_my_var_sp() { return NULL; }
 };
@@ -6455,7 +6455,7 @@ public:
     : my_var(j, LOCAL_VAR),
       m_rcontext_handler(rcontext_handler),
       m_type_handler(type_handler), offset(o), sp(s) { }
-  ~my_var_sp() { }
+  ~my_var_sp() = default;
   bool set(THD *thd, Item *val);
   my_var_sp *get_my_var_sp() { return this; }
   const Type_handler *type_handler() const { return m_type_handler; }
@@ -6484,7 +6484,7 @@ class my_var_user: public my_var {
 public:
   my_var_user(const LEX_CSTRING *j)
     : my_var(j, SESSION_VAR) { }
-  ~my_var_user() { }
+  ~my_var_user() = default;
   bool set(THD *thd, Item *val);
 };
 
@@ -6497,7 +6497,7 @@ public:
   select_dumpvar(THD *thd_arg)
    :select_result_interceptor(thd_arg), row_count(0), m_var_sp_row(NULL)
   { var_list.empty(); }
-  ~select_dumpvar() {}
+  ~select_dumpvar() = default;
   int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
   int send_data(List<Item> &items);
   bool send_eof();