presto-iceberg/src/main/java/io/prestosql/plugin/iceberg/IcebergMetadata.java/IcebergMetadata/getColumnMetadata
class IcebergMetadata:    @Override
    public ColumnMetadata getColumnMetadata(ConnectorSession session, ConnectorTableHandle tableHandle, ColumnHandle columnHandle)
    {
        IcebergColumnHandle column = (IcebergColumnHandle) columnHandle;
        return ColumnMetadata.builder()
                .setName(column.getName())
                .setType(column.getType())
                .setComment(column.getComment())
                .build();
    }