code: public Object getAt(int index) throws SQLException {
          index = normalizeIndex(index);
          return getResultSet().getObject(index);
      }
docs: Supports integer based subscript operators for accessing at numbered columns
  starting at zero. Negative indices are supported, they will count from the last column backwards.
  
  @param index is the number of the column to look at starting at 1
  @return the returned column value
  @throws java.sql.SQLException if something goes wrong
  @see ResultSet#getObject(int)