Examples with RcFileReader com.facebook.presto.rcfile.RcFileReader used on opensource projects

Example 1 with RcFileReader

use of com.facebook.presto.rcfile.RcFileReader in project presto by prestodb.

the class RcFilePageSourceFactory method createPageSource.

@Override
public Optional<? extends ConnectorPageSource> createPageSource(Configuration configuration, ConnectorSession session, Path path, long start, long length, Properties schema, List<HiveColumnHandle> columns, TupleDomain<HiveColumnHandle> effectivePredicate, DateTimeZone hiveStorageTimeZone) {
    if (!isRcfileOptimizedReaderEnabled(session)) {
        return Optional.empty();
    }
    RcFileEncoding rcFileEncoding;
    String deserializerClassName = getDeserializerClassName(schema);
    if (deserializerClassName.equals(LazyBinaryColumnarSerDe.class.getName())) {
        rcFileEncoding = new BinaryRcFileEncoding();
    } else if (deserializerClassName.equals(ColumnarSerDe.class.getName())) {
        rcFileEncoding = createTextVectorEncoding(schema, hiveStorageTimeZone);
    } else {
        return Optional.empty();
    }
    long size;
    FSDataInputStream inputStream;
    try {
        FileSystem fileSystem = hdfsEnvironment.getFileSystem(session.getUser(), path, configuration);
        size = fileSystem.getFileStatus(path).getLen();
        inputStream = fileSystem.open(path);
    } catch (Exception e) {
        if (nullToEmpty(e.getMessage()).trim().equals("Filesystem closed") || e instanceof FileNotFoundException) {
            throw new PrestoException(HIVE_CANNOT_OPEN_SPLIT, e);
        }
        throw new PrestoException(HIVE_CANNOT_OPEN_SPLIT, splitError(e, path, start, length), e);
    }
    try {
        ImmutableMap.Builder<Integer, Type> readColumns = ImmutableMap.builder();
        for (HiveColumnHandle column : columns) {
            readColumns.put(column.getHiveColumnIndex(), column.getHiveType().getType(typeManager));
        }
        RcFileReader rcFileReader = new RcFileReader(new HdfsRcFileDataSource(path.toString(), inputStream, size), rcFileEncoding, readColumns.build(), new AircompressorCodecFactory(new HadoopCodecFactory(configuration.getClassLoader())), start, length, new DataSize(1, Unit.MEGABYTE));
        return Optional.of(new RcFilePageSource(rcFileReader, columns, hiveStorageTimeZone, typeManager));
    } catch (Throwable e) {
        try {
            inputStream.close();
        } catch (IOException ignored) {
        }
        if (e instanceof PrestoException) {
            throw (PrestoException) e;
        }
        String message = splitError(e, path, start, length);
        if (e.getClass().getSimpleName().equals("BlockMissingException")) {
            throw new PrestoException(HIVE_MISSING_DATA, message, e);
        }
        throw new PrestoException(HIVE_CANNOT_OPEN_SPLIT, message, e);
    }
}