Examples with Stream io.prestosql.orc.metadata.Stream used on opensource projects

Example 26 with Stream

use of io.prestosql.orc.metadata.Stream in project hetu-core by openlookeng.

the class TimestampColumnWriter method getIndexStreams.

@Override
public List<StreamDataOutput> getIndexStreams(CompressedMetadataWriter metadataWriter) throws IOException {
    checkState(closed);
    ImmutableList.Builder<RowGroupIndex> rowGroupIndexes = ImmutableList.builder();
    List<LongStreamCheckpoint> secondsCheckpoints = secondsStream.getCheckpoints();
    List<LongStreamCheckpoint> nanosCheckpoints = nanosStream.getCheckpoints();
    Optional<List<BooleanStreamCheckpoint>> presentCheckpoints = presentStream.getCheckpoints();
    for (int i = 0; i < rowGroupColumnStatistics.size(); i++) {
        int groupId = i;
        ColumnStatistics columnStatistics = rowGroupColumnStatistics.get(groupId);
        LongStreamCheckpoint secondsCheckpoint = secondsCheckpoints.get(groupId);
        LongStreamCheckpoint nanosCheckpoint = nanosCheckpoints.get(groupId);
        Optional<BooleanStreamCheckpoint> presentCheckpoint = presentCheckpoints.map(checkpoints -> checkpoints.get(groupId));
        List<Integer> positions = createTimestampColumnPositionList(compressed, secondsCheckpoint, nanosCheckpoint, presentCheckpoint);
        rowGroupIndexes.add(new RowGroupIndex(positions, columnStatistics));
    }
    Slice slice = metadataWriter.writeRowIndexes(rowGroupIndexes.build());
    Stream stream = new Stream(columnId, StreamKind.ROW_INDEX, slice.length(), false);
    return ImmutableList.of(new StreamDataOutput(slice, stream));
}

Example 27 with Stream

use of io.prestosql.orc.metadata.Stream in project hetu-core by openlookeng.

the class TestOrcWriter method testWriteOutputStreamsInOrder.

@Test
public void testWriteOutputStreamsInOrder() throws IOException {
    for (OrcWriteValidationMode validationMode : OrcWriteValidationMode.values()) {
        TempFile tempFile = new TempFile();
        OrcWriter writer = new OrcWriter(new OutputStreamOrcDataSink(new FileOutputStream(tempFile.getFile())), ImmutableList.of("test1", "test2", "test3", "test4", "test5"), ImmutableList.of(VARCHAR, VARCHAR, VARCHAR, VARCHAR, VARCHAR), NONE, new OrcWriterOptions().withStripeMinSize(new DataSize(0, MEGABYTE)).withStripeMaxSize(new DataSize(32, MEGABYTE)).withStripeMaxRowCount(ORC_STRIPE_SIZE).withRowGroupMaxRowCount(ORC_ROW_GROUP_SIZE).withDictionaryMaxMemory(new DataSize(32, MEGABYTE)), false, ImmutableMap.of(), true, validationMode, new OrcWriterStats(), Optional.empty(), Optional.empty());
        // write down some data with unsorted streams
        String[] data = new String[] { "a", "bbbbb", "ccc", "dd", "eeee" };
        Block[] blocks = new Block[data.length];
        int entries = 65536;
        BlockBuilder blockBuilder = VARCHAR.createBlockBuilder(null, entries);
        for (int i = 0; i < data.length; i++) {
            byte[] bytes = data[i].getBytes();
            for (int j = 0; j < entries; j++) {
                // force to write different data
                bytes[0] = (byte) ((bytes[0] + 1) % 128);
                blockBuilder.writeBytes(Slices.wrappedBuffer(bytes, 0, bytes.length), 0, bytes.length);
                blockBuilder.closeEntry();
            }
            blocks[i] = blockBuilder.build();
            blockBuilder = blockBuilder.newBlockBuilderLike(null);
        }
        writer.write(new Page(blocks));
        writer.close();
        // read the footer and verify the streams are ordered by size
        DataSize dataSize = new DataSize(1, MEGABYTE);
        OrcDataSource orcDataSource = new FileOrcDataSource(tempFile.getFile(), dataSize, dataSize, dataSize, true, tempFile.getFile().lastModified());
        Footer footer = new OrcReader(orcDataSource, dataSize, dataSize, dataSize).getFooter();
        for (StripeInformation stripe : footer.getStripes()) {
            // read the footer
            Slice tailBuffer = orcDataSource.readFully(stripe.getOffset() + stripe.getIndexLength() + stripe.getDataLength(), toIntExact(stripe.getFooterLength()));
            try (InputStream inputStream = new OrcInputStream(OrcChunkLoader.create(orcDataSource.getId(), tailBuffer, Optional.empty(), newSimpleAggregatedMemoryContext()))) {
                StripeFooter stripeFooter = new OrcMetadataReader().readStripeFooter(footer.getTypes(), inputStream, ZoneId.of("UTC"));
                int size = 0;
                boolean dataStreamStarted = false;
                for (Stream stream : stripeFooter.getStreams()) {
                    if (isIndexStream(stream)) {
                        assertFalse(dataStreamStarted);
                        continue;
                    }
                    dataStreamStarted = true;
                    // verify sizes in order
                    assertGreaterThanOrEqual(stream.getLength(), size);
                    size = stream.getLength();
                }
            }
        }
    }
}