# File lib/dm-migrations/adapters/dm-oracle-adapter.rb, line 115
      def destroy_model_storage(model, forced = false)
        table_name = model.storage_name(name)
        klass      = self.class
        truncate_or_delete = klass.auto_migrate_with
        if storage_exists?(table_name)
          if truncate_or_delete && !forced
            case truncate_or_delete
            when :truncate
              execute(truncate_table_statement(model))
            when :delete
              execute(delete_table_statement(model))
            else
              raise ArgumentError, "Unsupported auto_migrate_with option"
            end
            @truncated_tables ||= {}
            @truncated_tables[table_name] = true
          else
            execute(drop_table_statement(model))
            @truncated_tables[table_name] = nil if @truncated_tables
          end
        end
        # added destroy of sequences
        reset_sequences = klass.auto_migrate_reset_sequences
        table_is_truncated = @truncated_tables && @truncated_tables[table_name]
        unless truncate_or_delete && !reset_sequences && !forced
          if sequence_exists?(model_sequence_name(model))
            statement = if table_is_truncated && !forced
              reset_sequence_statement(model)
            else
              drop_sequence_statement(model)
            end
            execute(statement) if statement
          end
        end
        true
      end