presto-accumulo/src/main/java/io/prestosql/plugin/accumulo/AccumuloClient.java/AccumuloClient/getRowIdColumn
class AccumuloClient:    private static String getRowIdColumn(ConnectorTableMetadata meta)
    {
        Optional<String> rowIdColumn = AccumuloTableProperties.getRowId(meta.getProperties());
        return rowIdColumn.orElse(meta.getColumns().get(0).getName()).toLowerCase(Locale.ENGLISH);
    }