1 files changed, 8 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
index 1783b036a2..8c83c4f5db 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
@@ -30,6 +30,10 @@ module ActiveRecord
           super
         end
 
+        def explicit_default?
+          !null && (sql_type =~ /blob/i || type == :text)
+        end
+
         # Must return the relevant concrete adapter
         def adapter
           raise NotImplementedError
@@ -320,6 +324,10 @@ module ActiveRecord
         end
       end
 
+      def empty_insert_statement_value
+        "VALUES ()"
+      end
+
       # SCHEMA STATEMENTS ========================================
 
       def structure_dump #:nodoc: