@Override
    public String getParameterClassName(int param) throws SQLException {
        checkParamIndex(param);
        return Object.class.getName();
    }
Always returns {@code Object.class.getName()}.

@param param the first parameter is 1, the second is 2, ...
@return String {@code Object.class.getName()}
jdbc-v2/src/main/java/com/clickhouse/jdbc/metadata/ParameterMetaDataImpl.java