Examples with AdaptiveFloatingCodec org.apache.carbondata.core.datastore.page.encoding.adaptive.AdaptiveFloatingCodec used on opensource projects

Example 1 with AdaptiveFloatingCodec

use of org.apache.carbondata.core.datastore.page.encoding.adaptive.AdaptiveFloatingCodec in project carbondata by apache.

the class DefaultEncodingFactory method selectCodecByAlgorithmForFloating.

// choose between upscale adaptive encoder or upscale delta adaptive encoder,
// based on whose target data type size is smaller
static ColumnPageCodec selectCodecByAlgorithmForFloating(SimpleStatsResult stats) {
    DataType srcDataType = stats.getDataType();
    double maxValue = (double) stats.getMax();
    double minValue = (double) stats.getMin();
    int decimalCount = stats.getDecimalCount();
    // Here we should use the Max abs as max to getDatatype, let's say -1 and -10000000, -1 is max,
    // but we can't use -1 to getDatatype, we should use -10000000.
    double absMaxValue = Math.max(Math.abs(maxValue), Math.abs(minValue));
    if (decimalCount == 0) {
        // short, int, long
        return selectCodecByAlgorithmForIntegral(stats);
    } else if (decimalCount < 0) {
        return new DirectCompressCodec(DataTypes.DOUBLE);
    } else {
        // double
        long max = (long) (Math.pow(10, decimalCount) * absMaxValue);
        DataType adaptiveDataType = fitLongMinMax(max, 0);
        DataType deltaDataType = compareMinMaxAndSelectDataType((long) (Math.pow(10, decimalCount) * (maxValue - minValue)));
        if (adaptiveDataType.getSizeInBytes() > deltaDataType.getSizeInBytes()) {
            return new AdaptiveDeltaFloatingCodec(srcDataType, deltaDataType, stats);
        } else if (adaptiveDataType.getSizeInBytes() < DataTypes.DOUBLE.getSizeInBytes()) {
            return new AdaptiveFloatingCodec(srcDataType, adaptiveDataType, stats);
        } else {
            return new DirectCompressCodec(DataTypes.DOUBLE);
        }
    }
}

Example 2 with AdaptiveFloatingCodec

use of org.apache.carbondata.core.datastore.page.encoding.adaptive.AdaptiveFloatingCodec in project carbondata by apache.

the class EncodingFactory method createDecoderLegacy.

/**
 * Old way of creating decoder, based on algorithm
 */
public ColumnPageDecoder createDecoderLegacy(ValueEncoderMeta metadata) {
    SimpleStatsResult stats = PrimitivePageStatsCollector.newInstance(metadata);
    TableSpec.ColumnSpec spec = TableSpec.ColumnSpec.newInstanceLegacy("legacy", stats.getDataType(), ColumnType.MEASURE);
    String compressor = "snappy";
    DataType dataType = DataType.getDataType(metadata.getType());
    if (dataType == DataTypes.BYTE || dataType == DataTypes.SHORT || dataType == DataTypes.INT || dataType == DataTypes.LONG) {
        // create the codec based on algorithm and create decoder by recovering the metadata
        ColumnPageCodec codec = DefaultEncodingFactory.selectCodecByAlgorithmForIntegral(stats);
        if (codec instanceof AdaptiveIntegralCodec) {
            AdaptiveIntegralCodec adaptiveCodec = (AdaptiveIntegralCodec) codec;
            ColumnPageEncoderMeta meta = new ColumnPageEncoderMeta(spec, adaptiveCodec.getTargetDataType(), stats, compressor);
            return codec.createDecoder(meta);
        } else if (codec instanceof AdaptiveDeltaIntegralCodec) {
            AdaptiveDeltaIntegralCodec adaptiveCodec = (AdaptiveDeltaIntegralCodec) codec;
            ColumnPageEncoderMeta meta = new ColumnPageEncoderMeta(spec, adaptiveCodec.getTargetDataType(), stats, compressor);
            return codec.createDecoder(meta);
        } else if (codec instanceof DirectCompressCodec) {
            ColumnPageEncoderMeta meta = new ColumnPageEncoderMeta(spec, DataType.getDataType(metadata.getType()), stats, compressor);
            return codec.createDecoder(meta);
        } else {
            throw new RuntimeException("internal error");
        }
    } else if (dataType == DataTypes.FLOAT || dataType == DataTypes.DOUBLE) {
        // create the codec based on algorithm and create decoder by recovering the metadata
        ColumnPageCodec codec = DefaultEncodingFactory.selectCodecByAlgorithmForFloating(stats);
        if (codec instanceof AdaptiveFloatingCodec) {
            AdaptiveFloatingCodec adaptiveCodec = (AdaptiveFloatingCodec) codec;
            ColumnPageEncoderMeta meta = new ColumnPageEncoderMeta(spec, adaptiveCodec.getTargetDataType(), stats, compressor);
            return codec.createDecoder(meta);
        } else if (codec instanceof DirectCompressCodec) {
            ColumnPageEncoderMeta meta = new ColumnPageEncoderMeta(spec, DataType.getDataType(metadata.getType()), stats, compressor);
            return codec.createDecoder(meta);
        } else if (codec instanceof AdaptiveDeltaFloatingCodec) {
            AdaptiveDeltaFloatingCodec adaptiveCodec = (AdaptiveDeltaFloatingCodec) codec;
            ColumnPageEncoderMeta meta = new ColumnPageEncoderMeta(spec, adaptiveCodec.getTargetDataType(), stats, compressor);
            return codec.createDecoder(meta);
        } else {
            throw new RuntimeException("internal error");
        }
    } else if (DataTypes.isDecimal(dataType) || dataType == DataTypes.BYTE_ARRAY) {
        // no dictionary dimension
        return new DirectCompressCodec(stats.getDataType()).createDecoder(new ColumnPageEncoderMeta(spec, stats.getDataType(), stats, compressor));
    } else if (dataType == DataTypes.LEGACY_LONG) {
        // In case of older versions like in V1 format it has special datatype to handle
        AdaptiveIntegralCodec adaptiveCodec = new AdaptiveIntegralCodec(DataTypes.LONG, DataTypes.LONG, stats);
        ColumnPageEncoderMeta meta = new ColumnPageEncoderMeta(spec, adaptiveCodec.getTargetDataType(), stats, compressor);
        return adaptiveCodec.createDecoder(meta);
    } else {
        throw new RuntimeException("unsupported data type: " + stats.getDataType());
    }
}

Example 3 with AdaptiveFloatingCodec

use of org.apache.carbondata.core.datastore.page.encoding.adaptive.AdaptiveFloatingCodec in project carbondata by apache.

the class EncodingFactory method createDecoder.

/**
 * Return new decoder based on encoder metadata read from file
 */
public ColumnPageDecoder createDecoder(List<Encoding> encodings, List<ByteBuffer> encoderMetas) throws IOException {
    assert (encodings.size() == 1);
    assert (encoderMetas.size() == 1);
    Encoding encoding = encodings.get(0);
    byte[] encoderMeta = encoderMetas.get(0).array();
    ByteArrayInputStream stream = new ByteArrayInputStream(encoderMeta);
    DataInputStream in = new DataInputStream(stream);
    if (encoding == DIRECT_COMPRESS) {
        ColumnPageEncoderMeta metadata = new ColumnPageEncoderMeta();
        metadata.readFields(in);
        return new DirectCompressCodec(metadata.getStoreDataType()).createDecoder(metadata);
    } else if (encoding == ADAPTIVE_INTEGRAL) {
        ColumnPageEncoderMeta metadata = new ColumnPageEncoderMeta();
        metadata.readFields(in);
        SimpleStatsResult stats = PrimitivePageStatsCollector.newInstance(metadata);
        return new AdaptiveIntegralCodec(metadata.getSchemaDataType(), metadata.getStoreDataType(), stats).createDecoder(metadata);
    } else if (encoding == ADAPTIVE_DELTA_INTEGRAL) {
        ColumnPageEncoderMeta metadata = new ColumnPageEncoderMeta();
        metadata.readFields(in);
        SimpleStatsResult stats = PrimitivePageStatsCollector.newInstance(metadata);
        return new AdaptiveDeltaIntegralCodec(metadata.getSchemaDataType(), metadata.getStoreDataType(), stats).createDecoder(metadata);
    } else if (encoding == ADAPTIVE_FLOATING) {
        ColumnPageEncoderMeta metadata = new ColumnPageEncoderMeta();
        metadata.readFields(in);
        SimpleStatsResult stats = PrimitivePageStatsCollector.newInstance(metadata);
        return new AdaptiveFloatingCodec(metadata.getSchemaDataType(), metadata.getStoreDataType(), stats).createDecoder(metadata);
    } else if (encoding == ADAPTIVE_DELTA_FLOATING) {
        ColumnPageEncoderMeta metadata = new ColumnPageEncoderMeta();
        metadata.readFields(in);
        SimpleStatsResult stats = PrimitivePageStatsCollector.newInstance(metadata);
        return new AdaptiveDeltaFloatingCodec(metadata.getSchemaDataType(), metadata.getStoreDataType(), stats).createDecoder(metadata);
    } else if (encoding == RLE_INTEGRAL) {
        RLEEncoderMeta metadata = new RLEEncoderMeta();
        metadata.readFields(in);
        return new RLECodec().createDecoder(metadata);
    } else if (encoding == BOOL_BYTE) {
        ColumnPageEncoderMeta metadata = new ColumnPageEncoderMeta();
        metadata.readFields(in);
        return new DirectCompressCodec(metadata.getStoreDataType()).createDecoder(metadata);
    } else {
        // for backward compatibility
        ValueEncoderMeta metadata = CarbonUtil.deserializeEncoderMetaV3(encoderMeta);
        return createDecoderLegacy(metadata);
    }
}