code: private ResultSet executeCQL(String cql) {
          m_logger.debug("Executing CQL: {}", cql);
          try {
              return m_dbservice.getSession().execute(cql);
          } catch (Exception e) {
              m_logger.error("CQL query failed", e);
              m_logger.info("   Query={}", cql);
              throw e;
          }
      }
docs: Execute and optionally log the given CQL statement.