code: @Override
      public void dropSchema()
      {
          if (operation != null && operation.equalsIgnoreCase("create-drop"))
          {
              drop();
          }
          operation = null;
          admin = null;
      }
docs: /*
  (non-Javadoc)
  
  @see com.impetus.kundera.configure.schema.api.SchemaManager#dropSchema()