bug#7761 - ndb does not autocommit during alter table

sql/sql_table.cc

@@ -3447,6 +3447,19 @@ copy_data_between_tables(TABLE *from,TABLE *to,
   if (!(copy= new Copy_field[to->fields]))
     DBUG_RETURN(-1);				/* purecov: inspected */
 
+  /*
+    Turn off recovery logging since rollback of an alter table is to
+    delete the new table so there is no need to log the changes to it.
+    
+    This needs to be done before external_lock
+  */
+  error= ha_enable_transaction(thd,FALSE);
+  if (error)
+  {
+    DBUG_RETURN(-1);
+  }
+
+
   if (to->file->external_lock(thd, F_WRLCK))
     DBUG_RETURN(-1);
   from->file->info(HA_STATUS_VARIABLE);
@@ -3502,17 +3515,6 @@ copy_data_between_tables(TABLE *from,TABLE *to,
       goto err;
   };
 
-  /*
-    Turn off recovery logging since rollback of an alter table is to
-    delete the new table so there is no need to log the changes to it.
-  */
-  error= ha_enable_transaction(thd,FALSE);
-  if (error)
-  {
-    error= 1;
-    goto err;
-  }
-
   /* Handler must be told explicitly to retrieve all columns, because
      this function does not set field->query_id in the columns to the
      current query id */