code: public <V> V executeAndFetchFirst(Class<V> returnType) {
          Object o = executeScalar();
          if (null == o) {
              return null;
          }
          return convert(o, returnType);
      }
docs: Execute the statement and return only the first record from the result set.
  
  @param returnType The Class to return.
  @param <V> The type parameter.
  @return An instance of {@literal <V>} from the result set.