code: public void dropSchema()
      {
          if (operation != null && operation.equalsIgnoreCase("create-drop"))
          {
              try
              {
                  dropKeyspaceOrCFs();
              }
              catch (Exception ex)
              {
                  log.error("Error during dropping schema in cassandra, Caused by: .", ex);
                  throw new SchemaGenerationException(ex, "Cassandra");
              }
          }
          cassandra_client = null;
      }
docs: drop schema method drop the table from keyspace.