docs: int findParameterIndex(String parameterName) throws SQLException {
  
          checkClosed();
  
          int index = parameterNameMap.get(parameterName, -1);
  
          if (index >= 0) {
              return index + 1;
          }
  
          throw Util.sqlException(ErrorCode.JDBC_COLUMN_NOT_FOUND,
                                  parameterName);
      }