presto-kudu/src/main/java/io/prestosql/plugin/kudu/KuduMetadata.java/KuduMetadata/getColumnMetadata
class KuduMetadata:    @Override
    public ColumnMetadata getColumnMetadata(ConnectorSession session, ConnectorTableHandle tableHandle, ColumnHandle columnHandle)
    {
        KuduColumnHandle kuduColumnHandle = (KuduColumnHandle) columnHandle;
        if (kuduColumnHandle.isVirtualRowId()) {
            return ColumnMetadata.builder()
                    .setName(KuduColumnHandle.ROW_ID)
                    .setType(VarbinaryType.VARBINARY)
                    .setHidden(true)
                    .build();
        }
        return kuduColumnHandle.getColumnMetadata();
    }