diff --git a/sql/handler.cc b/sql/handler.cc
index 1be1b197663..050c68d0e0c 100644
--- a/sql/handler.cc
+++ b/sql/handler.cc
@@ -7243,39 +7243,6 @@ bool handler::check_table_binlog_row_based_internal()
                     mysql_bin_log.is_open()));
 }
 
-
-#ifdef HAVE_REPLICATION
-static int binlog_log_row_online_alter(TABLE* table,
-                                       const uchar *before_record,
-                                       const uchar *after_record,
-                                       Log_func *log_func)
-{
-  THD *thd= table->in_use;
-
-  if (!table->online_alter_cache)
-  {
-    table->online_alter_cache= online_alter_binlog_get_cache_data(thd, table);
-    trans_register_ha(thd, false, binlog_hton, 0);
-    if (thd->in_multi_stmt_transaction_mode())
-      trans_register_ha(thd, true, binlog_hton, 0);
-  }
-
-  // We need to log all columns for the case if alter table changes primary key
-  DBUG_ASSERT(!before_record || bitmap_is_set_all(table->read_set));
-  MY_BITMAP *old_rpl_write_set= table->rpl_write_set;
-  table->rpl_write_set= &table->s->all_set;
-
-  int error= (*log_func)(thd, table, table->s->online_alter_binlog,
-                         table->online_alter_cache, true,
-                         before_record, after_record);
-
-  table->rpl_write_set= old_rpl_write_set;
-
-  return unlikely(error) ? HA_ERR_RBR_LOGGING_FAILED : 0;
-}
-#endif // HAVE_REPLICATION
-
-
 static int binlog_log_row_to_binlog(TABLE* table,
                                     const uchar *before_record,
                                     const uchar *after_record,
diff --git a/sql/handler.h b/sql/handler.h
index fe2625a8833..d3f0f844272 100644
--- a/sql/handler.h
+++ b/sql/handler.h
@@ -658,6 +658,7 @@ typedef ulonglong alter_table_operations;
 class Event_log;
 class Cache_flip_event_log;
 class binlog_cache_data;
+class online_alter_cache_data;
 typedef bool Log_func(THD*, TABLE*, Event_log *, binlog_cache_data *, bool,
                       const uchar*, const uchar*);
 
diff --git a/sql/log.cc b/sql/log.cc
index df04752de85..1f011e00e31 100644
--- a/sql/log.cc
+++ b/sql/log.cc
@@ -275,13 +275,11 @@ void make_default_log_name(char **out, const char* log_ext, bool once)
   Helper classes to store non-transactional and transactional data
   before copying it to the binary log.
 */
-class binlog_cache_data: public Sql_alloc, public ilist_node<>
+class binlog_cache_data
 {
 public:
-  binlog_cache_data(): share(0), sv_list(0), m_pending(0), status(0),
-  before_stmt_pos(MY_OFF_T_UNDEF),
-  incident(FALSE),
-  saved_max_binlog_cache_size(0), ptr_binlog_cache_use(0),
+  binlog_cache_data(): before_stmt_pos(MY_OFF_T_UNDEF), m_pending(0), status(0),
+  incident(FALSE), saved_max_binlog_cache_size(0), ptr_binlog_cache_use(0),
   ptr_binlog_cache_disk_use(0)
   { }
   
@@ -361,11 +359,6 @@ public:
      before_stmt_pos= pos;
   }
   
-  void store_prev_position()
-  {
-    before_stmt_pos= my_b_write_tell(&cache_log);
-  }
-
   void restore_prev_position()
   {
     truncate(before_stmt_pos);
@@ -418,8 +411,12 @@ public:
   */
   IO_CACHE cache_log;
 
-  TABLE_SHARE *share; // for online alter table
-  SAVEPOINT *sv_list;
+protected:
+  /*
+    Binlog position before the start of the current statement.
+  */
+  my_off_t before_stmt_pos;
+
 private:
   /*
     Pending binrows event. This event is the event where the rows are currently
@@ -434,11 +431,6 @@ private:
   */
   uint32 status;
 
-  /*
-    Binlog position before the start of the current statement.
-  */
-  my_off_t before_stmt_pos;
- 
   /*
     This indicates that some events did not get into the cache and most likely
     it is corrupted.
@@ -506,6 +498,19 @@ private:
 };
 
 
+class online_alter_cache_data: public Sql_alloc, public ilist_node<>,
+  public binlog_cache_data
+{
+public:
+  void store_prev_position()
+  {
+    before_stmt_pos= my_b_write_tell(&cache_log);
+  }
+
+  TABLE_SHARE *share;
+  SAVEPOINT *sv_list;
+};
+
 void Log_event_writer::add_status(enum_logged_status status)
 {
   if (likely(cache_data))
@@ -2261,8 +2266,35 @@ static int binlog_commit_flush_xa_prepare(THD *thd, bool all,
 }
 
 #ifdef HAVE_REPLICATION
+int binlog_log_row_online_alter(TABLE* table, const uchar *before_record,
+                                const uchar *after_record, Log_func *log_func)
+{
+  THD *thd= table->in_use;
+
+  if (!table->online_alter_cache)
+  {
+    table->online_alter_cache= online_alter_binlog_get_cache_data(thd, table);
+    trans_register_ha(thd, false, binlog_hton, 0);
+    if (thd->in_multi_stmt_transaction_mode())
+      trans_register_ha(thd, true, binlog_hton, 0);
+  }
+
+  // We need to log all columns for the case if alter table changes primary key
+  DBUG_ASSERT(!before_record || bitmap_is_set_all(table->read_set));
+  MY_BITMAP *old_rpl_write_set= table->rpl_write_set;
+  table->rpl_write_set= &table->s->all_set;
+
+  int error= (*log_func)(thd, table, table->s->online_alter_binlog,
+                         table->online_alter_cache, true,
+                         before_record, after_record);
+
+  table->rpl_write_set= old_rpl_write_set;
+
+  return unlikely(error) ? HA_ERR_RBR_LOGGING_FAILED : 0;
+}
+
 static void
-binlog_online_alter_cleanup(ilist<binlog_cache_data> &list, bool ending_trans)
+binlog_online_alter_cleanup(ilist<online_alter_cache_data> &list, bool ending_trans)
 {
   if (ending_trans)
   {
@@ -6382,9 +6414,9 @@ write_err:
 
 
 #ifdef HAVE_REPLICATION
-static binlog_cache_data *binlog_setup_cache_data(MEM_ROOT *root, TABLE_SHARE *share)
+static online_alter_cache_data *binlog_setup_cache_data(MEM_ROOT *root, TABLE_SHARE *share)
 {
-  auto cache= new (root) binlog_cache_data();
+  auto cache= new (root) online_alter_cache_data();
   if (!cache || open_cached_file(&cache->cache_log, mysql_tmpdir,
                          LOG_PREFIX, (size_t)binlog_cache_size, MYF(MY_WME)))
   {
@@ -6399,9 +6431,9 @@ static binlog_cache_data *binlog_setup_cache_data(MEM_ROOT *root, TABLE_SHARE *s
   return cache;
 }
 
-binlog_cache_data *online_alter_binlog_get_cache_data(THD *thd, TABLE *table)
+online_alter_cache_data *online_alter_binlog_get_cache_data(THD *thd, TABLE *table)
 {
-  ilist<binlog_cache_data> &list= thd->online_alter_cache_list;
+  ilist<online_alter_cache_data> &list= thd->online_alter_cache_list;
 
   /* we assume it's very rare to have more than one online ALTER running */
   for (auto &cache: list)
diff --git a/sql/log.h b/sql/log.h
index 49f37ac3c3e..606e7786db5 100644
--- a/sql/log.h
+++ b/sql/log.h
@@ -1320,7 +1320,9 @@ int binlog_flush_pending_rows_event(THD *thd, bool stmt_end,
                                     binlog_cache_data *cache_data);
 Rows_log_event* binlog_get_pending_rows_event(binlog_cache_mngr *cache_mngr,
                                               bool use_trans_cache);
-binlog_cache_data *online_alter_binlog_get_cache_data(THD *thd, TABLE *table);
+int binlog_log_row_online_alter(TABLE* table, const uchar *before_record,
+                                const uchar *after_record, Log_func *log_func);
+online_alter_cache_data *online_alter_binlog_get_cache_data(THD *thd, TABLE *table);
 binlog_cache_data* binlog_get_cache_data(binlog_cache_mngr *cache_mngr,
                                          bool use_trans_cache);
 
diff --git a/sql/sql_class.h b/sql/sql_class.h
index 7c98a3bd1dc..cb06a3ab777 100644
--- a/sql/sql_class.h
+++ b/sql/sql_class.h
@@ -5556,7 +5556,7 @@ public:
   Item *sp_prepare_func_item(Item **it_addr, uint cols);
   bool sp_eval_expr(Field *result_field, Item **expr_item_ptr);
 
-  ilist<binlog_cache_data> online_alter_cache_list;
+  ilist<online_alter_cache_data> online_alter_cache_list;
 
   bool sql_parser(LEX *old_lex, LEX *lex,
                   char *str, uint str_len, bool stmt_prepare_mode);
diff --git a/sql/table.h b/sql/table.h
index 0ca8cb17c23..749af780f9a 100644
--- a/sql/table.h
+++ b/sql/table.h
@@ -1630,7 +1630,7 @@ public:
   */
   Item *notnull_cond;
 
-  binlog_cache_data *online_alter_cache;
+  online_alter_cache_data *online_alter_cache;
 
   inline void reset() { bzero((void*)this, sizeof(*this)); }
   void init(THD *thd, TABLE_LIST *tl);