Examples with StreamCheckpoint io.prestosql.orc.checkpoint.StreamCheckpoint used on opensource projects

Example 1 with StreamCheckpoint

use of io.prestosql.orc.checkpoint.StreamCheckpoint in project hetu-core by openlookeng.

the class StripeReader method createDictionaryStreamSources.

private InputStreamSources createDictionaryStreamSources(Map<StreamId, Stream> streams, Map<StreamId, ValueInputStream<?>> valueStreams, ColumnMetadata<ColumnEncoding> columnEncodings) {
    ImmutableMap.Builder<StreamId, InputStreamSource<?>> dictionaryStreamBuilder = ImmutableMap.builder();
    for (Entry<StreamId, Stream> entry : streams.entrySet()) {
        StreamId streamId = entry.getKey();
        Stream stream = entry.getValue();
        OrcColumnId column = stream.getColumnId();
        // only process dictionary streams
        ColumnEncodingKind columnEncoding = columnEncodings.get(column).getColumnEncodingKind();
        if (!isDictionary(stream, columnEncoding)) {
            continue;
        }
        // skip streams without data
        ValueInputStream<?> valueStream = valueStreams.get(streamId);
        if (valueStream == null) {
            continue;
        }
        OrcTypeKind columnType = types.get(stream.getColumnId()).getOrcTypeKind();
        StreamCheckpoint streamCheckpoint = getDictionaryStreamCheckpoint(streamId, columnType, columnEncoding);
        InputStreamSource<?> streamSource = createCheckpointStreamSource(valueStream, streamCheckpoint);
        dictionaryStreamBuilder.put(streamId, streamSource);
    }
    return new InputStreamSources(dictionaryStreamBuilder.build());
}

Example 2 with StreamCheckpoint

use of io.prestosql.orc.checkpoint.StreamCheckpoint in project hetu-core by openlookeng.

the class StripeReader method createRowGroup.

private static RowGroup createRowGroup(int groupId, int rowOffset, int rowCount, long minAverageRowBytes, Map<StreamId, ValueInputStream<?>> valueStreams, Map<StreamId, StreamCheckpoint> checkpoints) {
    ImmutableMap.Builder<StreamId, InputStreamSource<?>> builder = ImmutableMap.builder();
    for (Entry<StreamId, StreamCheckpoint> entry : checkpoints.entrySet()) {
        StreamId streamId = entry.getKey();
        StreamCheckpoint checkpoint = entry.getValue();
        // skip streams without data
        ValueInputStream<?> valueStream = valueStreams.get(streamId);
        if (valueStream == null) {
            continue;
        }
        builder.put(streamId, createCheckpointStreamSource(valueStream, checkpoint));
    }
    InputStreamSources rowGroupStreams = new InputStreamSources(builder.build());
    return new RowGroup(groupId, rowOffset, rowCount, minAverageRowBytes, rowGroupStreams);
}

Example 3 with StreamCheckpoint

use of io.prestosql.orc.checkpoint.StreamCheckpoint in project hetu-core by openlookeng.

the class StripeReader method createRowGroups.

private List<RowGroup> createRowGroups(int rowsInStripe, Map<StreamId, Stream> streams, Map<StreamId, ValueInputStream<?>> valueStreams, Map<StreamId, List<RowGroupIndex>> columnIndexes, Set<Integer> selectedRowGroups, ColumnMetadata<ColumnEncoding> encodings) throws InvalidCheckpointException {
    ImmutableList.Builder<RowGroup> rowGroupBuilder = ImmutableList.builder();
    for (int rowGroupId : selectedRowGroups) {
        Map<StreamId, StreamCheckpoint> checkpoints = getStreamCheckpoints(includedOrcColumnIds, types, decompressor.isPresent(), rowGroupId, encodings, streams, columnIndexes);
        int rowOffset = rowGroupId * rowsInRowGroup;
        int rowsInGroup = Math.min(rowsInStripe - rowOffset, rowsInRowGroup);
        long minAverageRowBytes = columnIndexes.entrySet().stream().mapToLong(e -> e.getValue().get(rowGroupId).getColumnStatistics().getMinAverageValueSizeInBytes()).sum();
        rowGroupBuilder.add(createRowGroup(rowGroupId, rowOffset, rowsInGroup, minAverageRowBytes, valueStreams, checkpoints));
    }
    return rowGroupBuilder.build();
}