Examples with Footer io.trino.orc.metadata.Footer used on opensource projects

Example 1 with Footer

use of io.trino.orc.metadata.Footer in project trino by trinodb.

the class TestOrcReaderPositions method testReadUserMetadata.

@Test
public void testReadUserMetadata() throws Exception {
    try (TempFile tempFile = new TempFile()) {
        Map<String, String> metadata = ImmutableMap.of("a", "ala", "b", "ma", "c", "kota");
        createFileWithOnlyUserMetadata(tempFile.getFile(), metadata);
        OrcDataSource orcDataSource = new FileOrcDataSource(tempFile.getFile(), READER_OPTIONS);
        OrcReader orcReader = OrcReader.createOrcReader(orcDataSource, READER_OPTIONS).orElseThrow(() -> new RuntimeException("File is empty"));
        Footer footer = orcReader.getFooter();
        Map<String, String> readMetadata = Maps.transformValues(footer.getUserMetadata(), Slice::toStringAscii);
        assertEquals(readMetadata, metadata);
    }
}

Example 2 with Footer

use of io.trino.orc.metadata.Footer in project trino by trinodb.

the class TestSliceDictionaryColumnReader method testDictionaryReaderUpdatesRetainedSize.

@Test
public void testDictionaryReaderUpdatesRetainedSize() throws Exception {
    // create orc file
    List<String> values = createValues();
    File temporaryDirectory = createTempDir();
    File orcFile = new File(temporaryDirectory, randomUUID().toString());
    writeOrcColumnTrino(orcFile, NONE, VARCHAR, values.iterator(), new OrcWriterStats());
    // prepare for read
    OrcDataSource dataSource = new MemoryOrcDataSource(new OrcDataSourceId(orcFile.getPath()), Slices.wrappedBuffer(readAllBytes(orcFile.toPath())));
    OrcReader orcReader = OrcReader.createOrcReader(dataSource, new OrcReaderOptions()).orElseThrow(() -> new RuntimeException("File is empty"));
    Footer footer = orcReader.getFooter();
    List<OrcColumn> columns = orcReader.getRootColumn().getNestedColumns();
    assertTrue(columns.size() == 1);
    StripeReader stripeReader = new StripeReader(dataSource, UTC, Optional.empty(), footer.getTypes(), ImmutableSet.copyOf(columns), footer.getRowsInRowGroup(), OrcPredicate.TRUE, ORIGINAL, new OrcMetadataReader(), Optional.empty());
    AggregatedMemoryContext memoryContext = newSimpleAggregatedMemoryContext();
    SliceDictionaryColumnReader columnReader = new SliceDictionaryColumnReader(columns.get(0), memoryContext.newLocalMemoryContext(TestSliceDictionaryColumnReader.class.getSimpleName()), -1, false);
    List<StripeInformation> stripeInformations = footer.getStripes();
    for (StripeInformation stripeInformation : stripeInformations) {
        Stripe stripe = stripeReader.readStripe(stripeInformation, newSimpleAggregatedMemoryContext());
        List<RowGroup> rowGroups = stripe.getRowGroups();
        columnReader.startStripe(stripe.getFileTimeZone(), stripe.getDictionaryStreamSources(), stripe.getColumnEncodings());
        for (RowGroup rowGroup : rowGroups) {
            columnReader.startRowGroup(rowGroup.getStreamSources());
            columnReader.prepareNextRead(1000);
            columnReader.readBlock();
            // memory usage check
            assertEquals(memoryContext.getBytes(), columnReader.getRetainedSizeInBytes());
        }
    }
    columnReader.close();
    assertTrue(memoryContext.getBytes() == 0);
}

Example 3 with Footer

use of io.trino.orc.metadata.Footer in project trino by trinodb.

the class TestOrcWriter method testWriteOutputStreamsInOrder.

@Test
public void testWriteOutputStreamsInOrder() throws IOException {
    for (OrcWriteValidationMode validationMode : OrcWriteValidationMode.values()) {
        TempFile tempFile = new TempFile();
        List<String> columnNames = ImmutableList.of("test1", "test2", "test3", "test4", "test5");
        List<Type> types = ImmutableList.of(VARCHAR, VARCHAR, VARCHAR, VARCHAR, VARCHAR);
        OrcWriter writer = new OrcWriter(new OutputStreamOrcDataSink(new FileOutputStream(tempFile.getFile())), ImmutableList.of("test1", "test2", "test3", "test4", "test5"), types, OrcType.createRootOrcType(columnNames, types), NONE, new OrcWriterOptions().withStripeMinSize(DataSize.of(0, MEGABYTE)).withStripeMaxSize(DataSize.of(32, MEGABYTE)).withStripeMaxRowCount(ORC_STRIPE_SIZE).withRowGroupMaxRowCount(ORC_ROW_GROUP_SIZE).withDictionaryMaxMemory(DataSize.of(32, MEGABYTE)).withBloomFilterColumns(ImmutableSet.copyOf(columnNames)), ImmutableMap.of(), true, validationMode, new OrcWriterStats());
        // 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(UTF_8);
            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
        OrcDataSource orcDataSource = new FileOrcDataSource(tempFile.getFile(), READER_OPTIONS);
        Footer footer = OrcReader.createOrcReader(orcDataSource, READER_OPTIONS).orElseThrow(() -> new RuntimeException("File is empty")).getFooter();
        // OrcReader closes the original data source because it buffers the full file, so we need to reopen
        orcDataSource = new FileOrcDataSource(tempFile.getFile(), READER_OPTIONS);
        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();
                }
            }
        }
    }
}

Example 4 with Footer

use of io.trino.orc.metadata.Footer in project trino by trinodb.

the class OrcWriter method bufferFileFooter.

/**
 * Collect the data for the file footer.  This is not the actual data, but
 * instead are functions that know how to write the data.
 */
private List<OrcDataOutput> bufferFileFooter() throws IOException {
    List<OrcDataOutput> outputData = new ArrayList<>();
    Metadata metadata = new Metadata(closedStripes.stream().map(ClosedStripe::getStatistics).map(Optional::of).collect(toList()));
    Slice metadataSlice = metadataWriter.writeMetadata(metadata);
    outputData.add(createDataOutput(metadataSlice));
    fileStats = toFileStats(closedStripes.stream().map(ClosedStripe::getStatistics).map(StripeStatistics::getColumnStatistics).collect(toList()));
    fileStatsRetainedBytes = fileStats.map(stats -> stats.stream().mapToLong(ColumnStatistics::getRetainedSizeInBytes).sum()).orElse(0L);
    recordValidation(validation -> validation.setFileStatistics(fileStats));
    Map<String, Slice> userMetadata = this.userMetadata.entrySet().stream().collect(Collectors.toMap(Entry::getKey, entry -> utf8Slice(entry.getValue())));
    Footer footer = new Footer(fileRowCount, rowGroupMaxRowCount == 0 ? OptionalInt.empty() : OptionalInt.of(rowGroupMaxRowCount), closedStripes.stream().map(ClosedStripe::getStripeInformation).collect(toImmutableList()), orcTypes, fileStats, userMetadata, // writer id will be set by MetadataWriter
    Optional.empty());
    closedStripes.clear();
    closedStripesRetainedBytes = 0;
    Slice footerSlice = metadataWriter.writeFooter(footer);
    outputData.add(createDataOutput(footerSlice));
    recordValidation(validation -> validation.setVersion(metadataWriter.getOrcMetadataVersion()));
    Slice postscriptSlice = metadataWriter.writePostscript(footerSlice.length(), metadataSlice.length(), compression, maxCompressionBufferSize);
    outputData.add(createDataOutput(postscriptSlice));
    outputData.add(createDataOutput(Slices.wrappedBuffer(UnsignedBytes.checkedCast(postscriptSlice.length()))));
    return outputData;
}