presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/storage/OrcStorageManager.java/OrcStorageManager/getColumnInfoFromOrcUserMetadata
class OrcStorageManager:    private List<ColumnInfo> getColumnInfoFromOrcUserMetadata(OrcFileMetadata orcFileMetadata)
    {
        return orcFileMetadata.getColumnTypes().entrySet()
                .stream()
                .sorted(Map.Entry.comparingByKey())
                .map(entry -> new ColumnInfo(entry.getKey(), typeManager.getType(entry.getValue())))
                .collect(toList());
    }