Fixes Minimalistcs unit tests for SQL Server. Closes #9927 [lawrence]

git-svn-id: http://dev.rubyonrails.org/svn/rails/adapters/sqlserver@7971 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

Author: lawrence

lib/active_record/connection_adapters/sqlserver_adapter.rb

@@ -299,6 +299,10 @@ def columns(table_name, name = nil)
         end
         columns
       end
+      
+      def empty_insert_statement(table_name)
+        "INSERT INTO #{table_name} DEFAULT VALUES"
+      end      
 
       def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil)
         super || select_value("SELECT @@IDENTITY AS Ident")