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apache / orc / be0f1c4de0f02cdc4aff3d48ba8beafae3dddb2d / . / c++ / src / ColumnWriter.cc
blob: 6e1ec31bc670033a567a10559222f1ef695de094 [file] [log] [blame]
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "orc/Int128.hh"
#include "orc/Writer.hh"
#include "ByteRLE.hh"
#include "ColumnWriter.hh"
#include "RLE.hh"
#include "Statistics.hh"
#include "Timezone.hh"
namespace orc {
StreamsFactory::~StreamsFactory() {
//PASS
}
class StreamsFactoryImpl : public StreamsFactory {
public:
StreamsFactoryImpl(
const WriterOptions& writerOptions,
OutputStream* outputStream) :
options(writerOptions),
outStream(outputStream) {
}
virtual std::unique_ptr<BufferedOutputStream>
createStream(proto::Stream_Kind kind) const override;
private:
const WriterOptions& options;
OutputStream* outStream;
};
std::unique_ptr<BufferedOutputStream> StreamsFactoryImpl::createStream(
proto::Stream_Kind) const {
// In the future, we can decide compression strategy and modifier
// based on stream kind. But for now we just use the setting from
// WriterOption
return createCompressor(
options.getCompression(),
outStream,
options.getCompressionStrategy(),
// BufferedOutputStream initial capacity
1 * 1024 * 1024,
options.getCompressionBlockSize(),
*options.getMemoryPool());
}
std::unique_ptr<StreamsFactory> createStreamsFactory(
const WriterOptions& options,
OutputStream* outStream) {
return std::unique_ptr<StreamsFactory>(
new StreamsFactoryImpl(options, outStream));
}
RowIndexPositionRecorder::~RowIndexPositionRecorder() {
// PASS
}
proto::ColumnEncoding_Kind RleVersionMapper(RleVersion rleVersion)
{
switch (rleVersion)
{
case RleVersion_1:
return proto::ColumnEncoding_Kind_DIRECT;
case RleVersion_2:
return proto::ColumnEncoding_Kind_DIRECT_V2;
default:
throw InvalidArgument("Invalid param");
}
}
ColumnWriter::ColumnWriter(
const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
columnId(type.getColumnId()),
colIndexStatistics(),
colStripeStatistics(),
colFileStatistics(),
enableIndex(options.getEnableIndex()),
rowIndex(),
rowIndexEntry(),
rowIndexPosition(),
enableBloomFilter(false),
memPool(*options.getMemoryPool()),
indexStream(),
bloomFilterStream() {
std::unique_ptr<BufferedOutputStream> presentStream =
factory.createStream(proto::Stream_Kind_PRESENT);
notNullEncoder = createBooleanRleEncoder(std::move(presentStream));
colIndexStatistics = createColumnStatistics(type);
colStripeStatistics = createColumnStatistics(type);
colFileStatistics = createColumnStatistics(type);
if (enableIndex) {
rowIndex = std::unique_ptr<proto::RowIndex>(new proto::RowIndex());
rowIndexEntry =
std::unique_ptr<proto::RowIndexEntry>(new proto::RowIndexEntry());
rowIndexPosition = std::unique_ptr<RowIndexPositionRecorder>(
new RowIndexPositionRecorder(*rowIndexEntry));
indexStream =
factory.createStream(proto::Stream_Kind_ROW_INDEX);
// BloomFilters for non-UTF8 strings and non-UTC timestamps are not supported
if (options.isColumnUseBloomFilter(columnId)
&& options.getBloomFilterVersion() == BloomFilterVersion::UTF8) {
enableBloomFilter = true;
bloomFilter.reset(new BloomFilterImpl(
options.getRowIndexStride(), options.getBloomFilterFPP()));
bloomFilterIndex.reset(new proto::BloomFilterIndex());
bloomFilterStream = factory.createStream(proto::Stream_Kind_BLOOM_FILTER_UTF8);
}
}
}
ColumnWriter::~ColumnWriter() {
// PASS
}
void ColumnWriter::add(ColumnVectorBatch& batch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
notNullEncoder->add(batch.notNull.data() + offset, numValues, incomingMask);
}
void ColumnWriter::flush(std::vector<proto::Stream>& streams) {
proto::Stream stream;
stream.set_kind(proto::Stream_Kind_PRESENT);
stream.set_column(static_cast<uint32_t>(columnId));
stream.set_length(notNullEncoder->flush());
streams.push_back(stream);
}
uint64_t ColumnWriter::getEstimatedSize() const {
return notNullEncoder->getBufferSize();
}
void ColumnWriter::getStripeStatistics(
std::vector<proto::ColumnStatistics>& stats) const {
getProtoBufStatistics(stats, colStripeStatistics.get());
}
void ColumnWriter::mergeStripeStatsIntoFileStats() {
colFileStatistics->merge(*colStripeStatistics);
colStripeStatistics->reset();
}
void ColumnWriter::mergeRowGroupStatsIntoStripeStats() {
colStripeStatistics->merge(*colIndexStatistics);
colIndexStatistics->reset();
}
void ColumnWriter::getFileStatistics(
std::vector<proto::ColumnStatistics>& stats) const {
getProtoBufStatistics(stats, colFileStatistics.get());
}
void ColumnWriter::createRowIndexEntry() {
proto::ColumnStatistics *indexStats = rowIndexEntry->mutable_statistics();
colIndexStatistics->toProtoBuf(*indexStats);
*rowIndex->add_entry() = *rowIndexEntry;
rowIndexEntry->clear_positions();
rowIndexEntry->clear_statistics();
colStripeStatistics->merge(*colIndexStatistics);
colIndexStatistics->reset();
addBloomFilterEntry();
recordPosition();
}
void ColumnWriter::addBloomFilterEntry() {
if (enableBloomFilter) {
BloomFilterUTF8Utils::serialize(*bloomFilter, *bloomFilterIndex->add_bloomfilter());
bloomFilter->reset();
}
}
void ColumnWriter::writeIndex(std::vector<proto::Stream> &streams) const {
// write row index to output stream
rowIndex->SerializeToZeroCopyStream(indexStream.get());
// construct row index stream
proto::Stream stream;
stream.set_kind(proto::Stream_Kind_ROW_INDEX);
stream.set_column(static_cast<uint32_t>(columnId));
stream.set_length(indexStream->flush());
streams.push_back(stream);
// write BLOOM_FILTER_UTF8 stream
if (enableBloomFilter) {
if (!bloomFilterIndex->SerializeToZeroCopyStream(bloomFilterStream.get())) {
throw std::logic_error("Failed to write bloom filter stream.");
}
stream.set_kind(proto::Stream_Kind_BLOOM_FILTER_UTF8);
stream.set_column(static_cast<uint32_t>(columnId));
stream.set_length(bloomFilterStream->flush());
streams.push_back(stream);
}
}
void ColumnWriter::recordPosition() const {
notNullEncoder->recordPosition(rowIndexPosition.get());
}
void ColumnWriter::reset() {
if (enableIndex) {
// clear row index
rowIndex->clear_entry();
rowIndexEntry->clear_positions();
rowIndexEntry->clear_statistics();
// write current positions
recordPosition();
}
if (enableBloomFilter) {
bloomFilter->reset();
bloomFilterIndex->clear_bloomfilter();
}
}
void ColumnWriter::writeDictionary() {
// PASS
}
class StructColumnWriter : public ColumnWriter {
public:
StructColumnWriter(
const Type& type,
const StreamsFactory& factory,
const WriterOptions& options);
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
virtual void flush(std::vector<proto::Stream>& streams) override;
virtual uint64_t getEstimatedSize() const override;
virtual void getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const override;
virtual void getStripeStatistics(
std::vector<proto::ColumnStatistics>& stats) const override;
virtual void getFileStatistics(
std::vector<proto::ColumnStatistics>& stats) const override;
virtual void mergeStripeStatsIntoFileStats() override;
virtual void mergeRowGroupStatsIntoStripeStats() override;
virtual void createRowIndexEntry() override;
virtual void writeIndex(
std::vector<proto::Stream> &streams) const override;
virtual void writeDictionary() override;
virtual void reset() override;
private:
std::vector<std::unique_ptr<ColumnWriter>> children;
};
StructColumnWriter::StructColumnWriter(
const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
ColumnWriter(type, factory, options) {
for(unsigned int i = 0; i < type.getSubtypeCount(); ++i) {
const Type& child = *type.getSubtype(i);
children.push_back(buildWriter(child, factory, options));
}
if (enableIndex) {
recordPosition();
}
}
void StructColumnWriter::add(
ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
const StructVectorBatch* structBatch =
dynamic_cast<const StructVectorBatch *>(&rowBatch);
if (structBatch == nullptr) {
throw InvalidArgument("Failed to cast to StructVectorBatch");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
const char* notNull = structBatch->hasNulls ?
structBatch->notNull.data() + offset : nullptr;
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->add(*structBatch->fields[i], offset, numValues, notNull);
}
// update stats
if (!notNull) {
colIndexStatistics->increase(numValues);
} else {
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (notNull[i]) {
++count;
}
}
colIndexStatistics->increase(count);
if (count < numValues) {
colIndexStatistics->setHasNull(true);
}
}
}
void StructColumnWriter::flush(std::vector<proto::Stream>& streams) {
ColumnWriter::flush(streams);
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->flush(streams);
}
}
void StructColumnWriter::writeIndex(
std::vector<proto::Stream> &streams) const {
ColumnWriter::writeIndex(streams);
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->writeIndex(streams);
}
}
uint64_t StructColumnWriter::getEstimatedSize() const {
uint64_t size = ColumnWriter::getEstimatedSize();
for (uint32_t i = 0; i < children.size(); ++i) {
size += children[i]->getEstimatedSize();
}
return size;
}
void StructColumnWriter::getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const {
proto::ColumnEncoding encoding;
encoding.set_kind(proto::ColumnEncoding_Kind_DIRECT);
encoding.set_dictionarysize(0);
encodings.push_back(encoding);
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->getColumnEncoding(encodings);
}
}
void StructColumnWriter::getStripeStatistics(
std::vector<proto::ColumnStatistics>& stats) const {
ColumnWriter::getStripeStatistics(stats);
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->getStripeStatistics(stats);
}
}
void StructColumnWriter::mergeStripeStatsIntoFileStats() {
ColumnWriter::mergeStripeStatsIntoFileStats();
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->mergeStripeStatsIntoFileStats();
}
}
void StructColumnWriter::getFileStatistics(
std::vector<proto::ColumnStatistics>& stats) const {
ColumnWriter::getFileStatistics(stats);
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->getFileStatistics(stats);
}
}
void StructColumnWriter::mergeRowGroupStatsIntoStripeStats() {
ColumnWriter::mergeRowGroupStatsIntoStripeStats();
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->mergeRowGroupStatsIntoStripeStats();
}
}
void StructColumnWriter::createRowIndexEntry() {
ColumnWriter::createRowIndexEntry();
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->createRowIndexEntry();
}
}
void StructColumnWriter::reset() {
ColumnWriter::reset();
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->reset();
}
}
void StructColumnWriter::writeDictionary() {
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->writeDictionary();
}
}
class IntegerColumnWriter : public ColumnWriter {
public:
IntegerColumnWriter(
const Type& type,
const StreamsFactory& factory,
const WriterOptions& options);
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
virtual void flush(std::vector<proto::Stream>& streams) override;
virtual uint64_t getEstimatedSize() const override;
virtual void getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const override;
virtual void recordPosition() const override;
protected:
std::unique_ptr<RleEncoder> rleEncoder;
private:
RleVersion rleVersion;
};
IntegerColumnWriter::IntegerColumnWriter(
const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
ColumnWriter(type, factory, options),
rleVersion(options.getRleVersion()) {
std::unique_ptr<BufferedOutputStream> dataStream =
factory.createStream(proto::Stream_Kind_DATA);
rleEncoder = createRleEncoder(
std::move(dataStream),
true,
rleVersion,
memPool,
options.getAlignedBitpacking());
if (enableIndex) {
recordPosition();
}
}
void IntegerColumnWriter::add(
ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
const LongVectorBatch* longBatch =
dynamic_cast<const LongVectorBatch*>(&rowBatch);
if (longBatch == nullptr) {
throw InvalidArgument("Failed to cast to LongVectorBatch");
}
IntegerColumnStatisticsImpl* intStats =
dynamic_cast<IntegerColumnStatisticsImpl*>(colIndexStatistics.get());
if (intStats == nullptr) {
throw InvalidArgument("Failed to cast to IntegerColumnStatisticsImpl");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
const int64_t* data = longBatch->data.data() + offset;
const char* notNull = longBatch->hasNulls ?
longBatch->notNull.data() + offset : nullptr;
rleEncoder->add(data, numValues, notNull);
// update stats
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (notNull == nullptr || notNull[i]) {
++count;
if (enableBloomFilter) {
bloomFilter->addLong(data[i]);
}
intStats->update(data[i], 1);
}
}
intStats->increase(count);
if (count < numValues) {
intStats->setHasNull(true);
}
}
void IntegerColumnWriter::flush(std::vector<proto::Stream>& streams) {
ColumnWriter::flush(streams);
proto::Stream stream;
stream.set_kind(proto::Stream_Kind_DATA);
stream.set_column(static_cast<uint32_t>(columnId));
stream.set_length(rleEncoder->flush());
streams.push_back(stream);
}
uint64_t IntegerColumnWriter::getEstimatedSize() const {
uint64_t size = ColumnWriter::getEstimatedSize();
size += rleEncoder->getBufferSize();
return size;
}
void IntegerColumnWriter::getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const {
proto::ColumnEncoding encoding;
encoding.set_kind(RleVersionMapper(rleVersion));
encoding.set_dictionarysize(0);
if (enableBloomFilter) {
encoding.set_bloomencoding(BloomFilterVersion::UTF8);
}
encodings.push_back(encoding);
}
void IntegerColumnWriter::recordPosition() const {
ColumnWriter::recordPosition();
rleEncoder->recordPosition(rowIndexPosition.get());
}
class ByteColumnWriter : public ColumnWriter {
public:
ByteColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options);
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
virtual void flush(std::vector<proto::Stream>& streams) override;
virtual uint64_t getEstimatedSize() const override;
virtual void getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const override;
virtual void recordPosition() const override;
private:
std::unique_ptr<ByteRleEncoder> byteRleEncoder;
};
ByteColumnWriter::ByteColumnWriter(
const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
ColumnWriter(type, factory, options) {
std::unique_ptr<BufferedOutputStream> dataStream =
factory.createStream(proto::Stream_Kind_DATA);
byteRleEncoder = createByteRleEncoder(std::move(dataStream));
if (enableIndex) {
recordPosition();
}
}
void ByteColumnWriter::add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
LongVectorBatch* byteBatch = dynamic_cast<LongVectorBatch*>(&rowBatch);
if (byteBatch == nullptr) {
throw InvalidArgument("Failed to cast to LongVectorBatch");
}
IntegerColumnStatisticsImpl* intStats =
dynamic_cast<IntegerColumnStatisticsImpl*>(colIndexStatistics.get());
if (intStats == nullptr) {
throw InvalidArgument("Failed to cast to IntegerColumnStatisticsImpl");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
int64_t* data = byteBatch->data.data() + offset;
const char* notNull = byteBatch->hasNulls ?
byteBatch->notNull.data() + offset : nullptr;
char* byteData = reinterpret_cast<char*>(data);
for (uint64_t i = 0; i < numValues; ++i) {
byteData[i] = static_cast<char>(data[i]);
}
byteRleEncoder->add(byteData, numValues, notNull);
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (notNull == nullptr || notNull[i]) {
++count;
if (enableBloomFilter) {
bloomFilter->addLong(data[i]);
}
intStats->update(static_cast<int64_t>(byteData[i]), 1);
}
}
intStats->increase(count);
if (count < numValues) {
intStats->setHasNull(true);
}
}
void ByteColumnWriter::flush(std::vector<proto::Stream>& streams) {
ColumnWriter::flush(streams);
proto::Stream stream;
stream.set_kind(proto::Stream_Kind_DATA);
stream.set_column(static_cast<uint32_t>(columnId));
stream.set_length(byteRleEncoder->flush());
streams.push_back(stream);
}
uint64_t ByteColumnWriter::getEstimatedSize() const {
uint64_t size = ColumnWriter::getEstimatedSize();
size += byteRleEncoder->getBufferSize();
return size;
}
void ByteColumnWriter::getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const {
proto::ColumnEncoding encoding;
encoding.set_kind(proto::ColumnEncoding_Kind_DIRECT);
encoding.set_dictionarysize(0);
if (enableBloomFilter) {
encoding.set_bloomencoding(BloomFilterVersion::UTF8);
}
encodings.push_back(encoding);
}
void ByteColumnWriter::recordPosition() const {
ColumnWriter::recordPosition();
byteRleEncoder->recordPosition(rowIndexPosition.get());
}
class BooleanColumnWriter : public ColumnWriter {
public:
BooleanColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options);
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
virtual void flush(std::vector<proto::Stream>& streams) override;
virtual uint64_t getEstimatedSize() const override;
virtual void getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const override;
virtual void recordPosition() const override;
private:
std::unique_ptr<ByteRleEncoder> rleEncoder;
};
BooleanColumnWriter::BooleanColumnWriter(
const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
ColumnWriter(type, factory, options) {
std::unique_ptr<BufferedOutputStream> dataStream =
factory.createStream(proto::Stream_Kind_DATA);
rleEncoder = createBooleanRleEncoder(std::move(dataStream));
if (enableIndex) {
recordPosition();
}
}
void BooleanColumnWriter::add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
LongVectorBatch* byteBatch = dynamic_cast<LongVectorBatch*>(&rowBatch);
if (byteBatch == nullptr) {
throw InvalidArgument("Failed to cast to LongVectorBatch");
}
BooleanColumnStatisticsImpl* boolStats =
dynamic_cast<BooleanColumnStatisticsImpl*>(colIndexStatistics.get());
if (boolStats == nullptr) {
throw InvalidArgument("Failed to cast to BooleanColumnStatisticsImpl");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
int64_t* data = byteBatch->data.data() + offset;
const char* notNull = byteBatch->hasNulls ?
byteBatch->notNull.data() + offset : nullptr;
char* byteData = reinterpret_cast<char*>(data);
for (uint64_t i = 0; i < numValues; ++i) {
byteData[i] = static_cast<char>(data[i]);
}
rleEncoder->add(byteData, numValues, notNull);
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (notNull == nullptr || notNull[i]) {
++count;
if (enableBloomFilter) {
bloomFilter->addLong(data[i]);
}
boolStats->update(byteData[i] != 0, 1);
}
}
boolStats->increase(count);
if (count < numValues) {
boolStats->setHasNull(true);
}
}
void BooleanColumnWriter::flush(std::vector<proto::Stream>& streams) {
ColumnWriter::flush(streams);
proto::Stream stream;
stream.set_kind(proto::Stream_Kind_DATA);
stream.set_column(static_cast<uint32_t>(columnId));
stream.set_length(rleEncoder->flush());
streams.push_back(stream);
}
uint64_t BooleanColumnWriter::getEstimatedSize() const {
uint64_t size = ColumnWriter::getEstimatedSize();
size += rleEncoder->getBufferSize();
return size;
}
void BooleanColumnWriter::getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const {
proto::ColumnEncoding encoding;
encoding.set_kind(proto::ColumnEncoding_Kind_DIRECT);
encoding.set_dictionarysize(0);
if (enableBloomFilter) {
encoding.set_bloomencoding(BloomFilterVersion::UTF8);
}
encodings.push_back(encoding);
}
void BooleanColumnWriter::recordPosition() const {
ColumnWriter::recordPosition();
rleEncoder->recordPosition(rowIndexPosition.get());
}
class DoubleColumnWriter : public ColumnWriter {
public:
DoubleColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options,
bool isFloat);
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
virtual void flush(std::vector<proto::Stream>& streams) override;
virtual uint64_t getEstimatedSize() const override;
virtual void getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const override;
virtual void recordPosition() const override;
private:
bool isFloat;
std::unique_ptr<AppendOnlyBufferedStream> dataStream;
DataBuffer<char> buffer;
};
DoubleColumnWriter::DoubleColumnWriter(
const Type& type,
const StreamsFactory& factory,
const WriterOptions& options,
bool isFloatType) :
ColumnWriter(type, factory, options),
isFloat(isFloatType),
buffer(*options.getMemoryPool()) {
dataStream.reset(new AppendOnlyBufferedStream(
factory.createStream(proto::Stream_Kind_DATA)));
buffer.resize(isFloat ? 4 : 8);
if (enableIndex) {
recordPosition();
}
}
// Floating point types are stored using IEEE 754 floating point bit layout.
// Float columns use 4 bytes per value and double columns use 8 bytes.
template <typename FLOAT_TYPE, typename INTEGER_TYPE>
inline void encodeFloatNum(FLOAT_TYPE input, char* output) {
INTEGER_TYPE* intBits = reinterpret_cast<INTEGER_TYPE*>(&input);
for (size_t i = 0; i < sizeof(INTEGER_TYPE); ++i) {
output[i] = static_cast<char>(((*intBits) >> (8 * i)) & 0xff);
}
}
void DoubleColumnWriter::add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
const DoubleVectorBatch* dblBatch =
dynamic_cast<const DoubleVectorBatch*>(&rowBatch);
if (dblBatch == nullptr) {
throw InvalidArgument("Failed to cast to DoubleVectorBatch");
}
DoubleColumnStatisticsImpl* doubleStats =
dynamic_cast<DoubleColumnStatisticsImpl*>(colIndexStatistics.get());
if (doubleStats == nullptr) {
throw InvalidArgument("Failed to cast to DoubleColumnStatisticsImpl");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
const double* doubleData = dblBatch->data.data() + offset;
const char* notNull = dblBatch->hasNulls ?
dblBatch->notNull.data() + offset : nullptr;
size_t bytes = isFloat ? 4 : 8;
char* data = buffer.data();
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (!notNull || notNull[i]) {
if (isFloat) {
encodeFloatNum<float, int32_t>(static_cast<float>(doubleData[i]), data);
} else {
encodeFloatNum<double, int64_t>(doubleData[i], data);
}
dataStream->write(data, bytes);
++count;
if (enableBloomFilter) {
bloomFilter->addDouble(doubleData[i]);
}
doubleStats->update(doubleData[i]);
}
}
doubleStats->increase(count);
if (count < numValues) {
doubleStats->setHasNull(true);
}
}
void DoubleColumnWriter::flush(std::vector<proto::Stream>& streams) {
ColumnWriter::flush(streams);
proto::Stream stream;
stream.set_kind(proto::Stream_Kind_DATA);
stream.set_column(static_cast<uint32_t>(columnId));
stream.set_length(dataStream->flush());
streams.push_back(stream);
}
uint64_t DoubleColumnWriter::getEstimatedSize() const {
uint64_t size = ColumnWriter::getEstimatedSize();
size += dataStream->getSize();
return size;
}
void DoubleColumnWriter::getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const {
proto::ColumnEncoding encoding;
encoding.set_kind(proto::ColumnEncoding_Kind_DIRECT);
encoding.set_dictionarysize(0);
if (enableBloomFilter) {
encoding.set_bloomencoding(BloomFilterVersion::UTF8);
}
encodings.push_back(encoding);
}
void DoubleColumnWriter::recordPosition() const {
ColumnWriter::recordPosition();
dataStream->recordPosition(rowIndexPosition.get());
}
/**
* Implementation of increasing sorted string dictionary
*/
class SortedStringDictionary {
public:
struct DictEntry {
DictEntry(const char * str, size_t len):data(str),length(len) {}
const char * data;
size_t length;
};
SortedStringDictionary():totalLength(0) {}
// insert a new string into dictionary, return its insertion order
size_t insert(const char * data, size_t len);
// write dictionary data & length to output buffer
void flush(AppendOnlyBufferedStream * dataStream,
RleEncoder * lengthEncoder) const;
// reorder input index buffer from insertion order to dictionary order
void reorder(std::vector<int64_t>& idxBuffer) const;
// get dict entries in insertion order
void getEntriesInInsertionOrder(std::vector<const DictEntry *>&) const;
// return count of entries
size_t size() const;
// return total length of strings in the dictioanry
uint64_t length() const;
void clear();
private:
struct LessThan {
bool operator()(const DictEntry& left, const DictEntry& right) const {
int ret = memcmp(left.data, right.data, std::min(left.length, right.length));
if (ret != 0) {
return ret < 0;
}
return left.length < right.length;
}
};
std::map<DictEntry, size_t, LessThan> dict;
std::vector<std::vector<char>> data;
uint64_t totalLength;
// use friend class here to avoid being bothered by const function calls
friend class StringColumnWriter;
friend class CharColumnWriter;
friend class VarCharColumnWriter;
// store indexes of insertion order in the dictionary for not-null rows
std::vector<int64_t> idxInDictBuffer;
};
// insert a new string into dictionary, return its insertion order
size_t SortedStringDictionary::insert(const char * str, size_t len) {
auto ret = dict.insert({DictEntry(str, len), dict.size()});
if (ret.second) {
// make a copy to internal storage
data.push_back(std::vector<char>(len));
memcpy(data.back().data(), str, len);
// update dictionary entry to link pointer to internal storage
DictEntry * entry = const_cast<DictEntry *>(&(ret.first->first));
entry->data = data.back().data();
totalLength += len;
}
return ret.first->second;
}
// write dictionary data & length to output buffer
void SortedStringDictionary::flush(AppendOnlyBufferedStream * dataStream,
RleEncoder * lengthEncoder) const {
for (auto it = dict.cbegin(); it != dict.cend(); ++it) {
dataStream->write(it->first.data, it->first.length);
lengthEncoder->write(static_cast<int64_t>(it->first.length));
}
}
/**
* Reorder input index buffer from insertion order to dictionary order
*
* We require this function because string values are buffered by indexes
* in their insertion order. Until the entire dictionary is complete can
* we get their sorted indexes in the dictionary in that ORC specification
* demands dictionary should be ordered. Therefore this function transforms
* the indexes from insertion order to dictionary value order for final
* output.
*/
void SortedStringDictionary::reorder(std::vector<int64_t>& idxBuffer) const {
// iterate the dictionary to get mapping from insertion order to value order
std::vector<size_t> mapping(dict.size());
size_t dictIdx = 0;
for (auto it = dict.cbegin(); it != dict.cend(); ++it) {
mapping[it->second] = dictIdx++;
}
// do the transformation
for (size_t i = 0; i != idxBuffer.size(); ++i) {
idxBuffer[i] = static_cast<int64_t>(
mapping[static_cast<size_t>(idxBuffer[i])]);
}
}
// get dict entries in insertion order
void SortedStringDictionary::getEntriesInInsertionOrder(
std::vector<const DictEntry *>& entries) const {
entries.resize(dict.size());
for (auto it = dict.cbegin(); it != dict.cend(); ++it) {
entries[it->second] = &(it->first);
}
}
// return count of entries
size_t SortedStringDictionary::size() const {
return dict.size();
}
// return total length of strings in the dictioanry
uint64_t SortedStringDictionary::length() const {
return totalLength;
}
void SortedStringDictionary::clear() {
totalLength = 0;
data.clear();
dict.clear();
}
class StringColumnWriter : public ColumnWriter {
public:
StringColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options);
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
virtual void flush(std::vector<proto::Stream>& streams) override;
virtual uint64_t getEstimatedSize() const override;
virtual void getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const override;
virtual void recordPosition() const override;
virtual void createRowIndexEntry() override;
virtual void writeDictionary() override;
virtual void reset() override;
private:
/**
* dictionary related functions
*/
bool checkDictionaryKeyRatio();
void createDirectStreams();
void createDictStreams();
void deleteDictStreams();
void fallbackToDirectEncoding();
protected:
RleVersion rleVersion;
bool useCompression;
const StreamsFactory& streamsFactory;
bool alignedBitPacking;
// direct encoding streams
std::unique_ptr<RleEncoder> directLengthEncoder;
std::unique_ptr<AppendOnlyBufferedStream> directDataStream;
// dictionary encoding streams
std::unique_ptr<RleEncoder> dictDataEncoder;
std::unique_ptr<RleEncoder> dictLengthEncoder;
std::unique_ptr<AppendOnlyBufferedStream> dictStream;
/**
* dictionary related variables
*/
SortedStringDictionary dictionary;
// whether or not dictionary checking is done
bool doneDictionaryCheck;
// whether or not it should be used
bool useDictionary;
// keys in the dictionary should not exceed this ratio
double dictSizeThreshold;
// record start row of each row group; null rows are skipped
mutable std::vector<size_t> startOfRowGroups;
};
StringColumnWriter::StringColumnWriter(
const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
ColumnWriter(type, factory, options),
rleVersion(options.getRleVersion()),
useCompression(options.getCompression() != CompressionKind_NONE),
streamsFactory(factory),
alignedBitPacking(options.getAlignedBitpacking()),
doneDictionaryCheck(false),
useDictionary(options.getEnableDictionary()),
dictSizeThreshold(options.getDictionaryKeySizeThreshold()){
if (type.getKind() == TypeKind::BINARY) {
useDictionary = false;
doneDictionaryCheck = true;
}
if (useDictionary) {
createDictStreams();
} else {
doneDictionaryCheck = true;
createDirectStreams();
}
if (enableIndex) {
recordPosition();
}
}
void StringColumnWriter::add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
const StringVectorBatch* stringBatch =
dynamic_cast<const StringVectorBatch*>(&rowBatch);
if (stringBatch == nullptr) {
throw InvalidArgument("Failed to cast to StringVectorBatch");
}
StringColumnStatisticsImpl* strStats =
dynamic_cast<StringColumnStatisticsImpl*>(colIndexStatistics.get());
if (strStats == nullptr) {
throw InvalidArgument("Failed to cast to StringColumnStatisticsImpl");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
char *const * data = stringBatch->data.data() + offset;
const int64_t* length = stringBatch->length.data() + offset;
const char* notNull = stringBatch->hasNulls ?
stringBatch->notNull.data() + offset : nullptr;
if (!useDictionary){
directLengthEncoder->add(length, numValues, notNull);
}
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (!notNull || notNull[i]) {
const size_t len = static_cast<size_t>(length[i]);
if (useDictionary) {
size_t index = dictionary.insert(data[i], len);
dictionary.idxInDictBuffer.push_back(static_cast<int64_t>(index));
} else {
directDataStream->write(data[i], len);
}
if (enableBloomFilter) {
bloomFilter->addBytes(data[i], static_cast<int64_t>(len));
}
strStats->update(data[i], len);
++count;
}
}
strStats->increase(count);
if (count < numValues) {
strStats->setHasNull(true);
}
}
void StringColumnWriter::flush(std::vector<proto::Stream>& streams) {
ColumnWriter::flush(streams);
if (useDictionary) {
proto::Stream data;
data.set_kind(proto::Stream_Kind_DATA);
data.set_column(static_cast<uint32_t>(columnId));
data.set_length(dictDataEncoder->flush());
streams.push_back(data);
proto::Stream dict;
dict.set_kind(proto::Stream_Kind_DICTIONARY_DATA);
dict.set_column(static_cast<uint32_t>(columnId));
dict.set_length(dictStream->flush());
streams.push_back(dict);
proto::Stream length;
length.set_kind(proto::Stream_Kind_LENGTH);
length.set_column(static_cast<uint32_t>(columnId));
length.set_length(dictLengthEncoder->flush());
streams.push_back(length);
} else {
proto::Stream length;
length.set_kind(proto::Stream_Kind_LENGTH);
length.set_column(static_cast<uint32_t>(columnId));
length.set_length(directLengthEncoder->flush());
streams.push_back(length);
proto::Stream data;
data.set_kind(proto::Stream_Kind_DATA);
data.set_column(static_cast<uint32_t>(columnId));
data.set_length(directDataStream->flush());
streams.push_back(data);
}
}
uint64_t StringColumnWriter::getEstimatedSize() const {
uint64_t size = ColumnWriter::getEstimatedSize();
if (!useDictionary) {
size += directLengthEncoder->getBufferSize();
size += directDataStream->getSize();
} else {
size += dictionary.length();
size += dictionary.size() * sizeof(int32_t);
size += dictionary.idxInDictBuffer.size() * sizeof(int32_t);
if (useCompression) {
size /= 3; // estimated ratio is 3:1
}
}
return size;
}
void StringColumnWriter::getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const {
proto::ColumnEncoding encoding;
if (!useDictionary) {
encoding.set_kind(rleVersion == RleVersion_1 ?
proto::ColumnEncoding_Kind_DIRECT :
proto::ColumnEncoding_Kind_DIRECT_V2);
} else {
encoding.set_kind(rleVersion == RleVersion_1 ?
proto::ColumnEncoding_Kind_DICTIONARY :
proto::ColumnEncoding_Kind_DICTIONARY_V2);
}
encoding.set_dictionarysize(static_cast<uint32_t>(dictionary.size()));
if (enableBloomFilter) {
encoding.set_bloomencoding(BloomFilterVersion::UTF8);
}
encodings.push_back(encoding);
}
void StringColumnWriter::recordPosition() const {
ColumnWriter::recordPosition();
if (!useDictionary) {
directDataStream->recordPosition(rowIndexPosition.get());
directLengthEncoder->recordPosition(rowIndexPosition.get());
} else {
if (enableIndex) {
startOfRowGroups.push_back(dictionary.idxInDictBuffer.size());
}
}
}
bool StringColumnWriter::checkDictionaryKeyRatio() {
if (!doneDictionaryCheck) {
useDictionary = dictionary.size() <= static_cast<size_t>(
static_cast<double>(dictionary.idxInDictBuffer.size()) * dictSizeThreshold);
doneDictionaryCheck = true;
}
return useDictionary;
}
void StringColumnWriter::createRowIndexEntry() {
if (useDictionary && !doneDictionaryCheck) {
if (!checkDictionaryKeyRatio()) {
fallbackToDirectEncoding();
}
}
ColumnWriter::createRowIndexEntry();
}
void StringColumnWriter::reset() {
ColumnWriter::reset();
dictionary.clear();
dictionary.idxInDictBuffer.resize(0);
startOfRowGroups.clear();
startOfRowGroups.push_back(0);
}
void StringColumnWriter::createDirectStreams() {
std::unique_ptr<BufferedOutputStream> directLengthStream =
streamsFactory.createStream(proto::Stream_Kind_LENGTH);
directLengthEncoder = createRleEncoder(std::move(directLengthStream),
false,
rleVersion,
memPool,
alignedBitPacking);
directDataStream.reset(new AppendOnlyBufferedStream(
streamsFactory.createStream(proto::Stream_Kind_DATA)));
}
void StringColumnWriter::createDictStreams() {
std::unique_ptr<BufferedOutputStream> dictDataStream =
streamsFactory.createStream(proto::Stream_Kind_DATA);
dictDataEncoder = createRleEncoder(std::move(dictDataStream),
false,
rleVersion,
memPool,
alignedBitPacking);
std::unique_ptr<BufferedOutputStream> dictLengthStream =
streamsFactory.createStream(proto::Stream_Kind_LENGTH);
dictLengthEncoder = createRleEncoder(std::move(dictLengthStream),
false,
rleVersion,
memPool,
alignedBitPacking);
dictStream.reset(new AppendOnlyBufferedStream(
streamsFactory.createStream(proto::Stream_Kind_DICTIONARY_DATA)));
}
void StringColumnWriter::deleteDictStreams() {
dictDataEncoder.reset(nullptr);
dictLengthEncoder.reset(nullptr);
dictStream.reset(nullptr);
dictionary.clear();
dictionary.idxInDictBuffer.clear();
startOfRowGroups.clear();
}
void StringColumnWriter::writeDictionary() {
if (useDictionary && !doneDictionaryCheck) {
// when index is disabled, dictionary check happens while writing 1st stripe
if (!checkDictionaryKeyRatio()) {
fallbackToDirectEncoding();
return;
}
}
if (useDictionary) {
// flush dictionary data & length streams
dictionary.flush(dictStream.get(), dictLengthEncoder.get());
// convert index from insertion order to dictionary order
dictionary.reorder(dictionary.idxInDictBuffer);
// write data sequences
int64_t * data = dictionary.idxInDictBuffer.data();
if (enableIndex) {
size_t prevOffset = 0;
for (size_t i = 0; i < startOfRowGroups.size(); ++i) {
// write sequences in batch for a row group stride
size_t offset = startOfRowGroups[i];
dictDataEncoder->add(data + prevOffset, offset - prevOffset, nullptr);
// update index positions
int rowGroupId = static_cast<int>(i);
proto::RowIndexEntry* indexEntry =
(rowGroupId < rowIndex->entry_size()) ?
rowIndex->mutable_entry(rowGroupId) : rowIndexEntry.get();
// add positions for direct streams
RowIndexPositionRecorder recorder(*indexEntry);
dictDataEncoder->recordPosition(&recorder);
prevOffset = offset;
}
dictDataEncoder->add(data + prevOffset,
dictionary.idxInDictBuffer.size() - prevOffset,
nullptr);
} else {
dictDataEncoder->add(data, dictionary.idxInDictBuffer.size(), nullptr);
}
}
}
void StringColumnWriter::fallbackToDirectEncoding() {
createDirectStreams();
if (enableIndex) {
// fallback happens at the 1st row group;
// simply complete positions for direct streams
proto::RowIndexEntry * indexEntry = rowIndexEntry.get();
RowIndexPositionRecorder recorder(*indexEntry);
directDataStream->recordPosition(&recorder);
directLengthEncoder->recordPosition(&recorder);
}
// get dictionary entries in insertion order
std::vector<const SortedStringDictionary::DictEntry *> entries;
dictionary.getEntriesInInsertionOrder(entries);
// store each length of the data into a vector
const SortedStringDictionary::DictEntry * dictEntry = nullptr;
for (uint64_t i = 0; i != dictionary.idxInDictBuffer.size(); ++i) {
// write one row data in direct encoding
dictEntry = entries[static_cast<size_t>(dictionary.idxInDictBuffer[i])];
directDataStream->write(dictEntry->data, dictEntry->length);
directLengthEncoder->write(static_cast<int64_t>(dictEntry->length));
}
deleteDictStreams();
}
struct Utf8Utils {
/**
* Counts how many utf-8 chars of the input data
*/
static uint64_t charLength(const char * data, uint64_t length) {
uint64_t chars = 0;
for (uint64_t i = 0; i < length; i++) {
if (isUtfStartByte(data[i])) {
chars++;
}
}
return chars;
}
/**
* Return the number of bytes required to read at most maxCharLength
* characters in full from a utf-8 encoded byte array provided
* by data. This does not validate utf-8 data, but
* operates correctly on already valid utf-8 data.
*
* @param maxCharLength number of characters required
* @param data the bytes of UTF-8
* @param length the length of data to truncate
*/
static uint64_t truncateBytesTo(uint64_t maxCharLength,
const char * data,
uint64_t length) {
uint64_t chars = 0;
if (length <= maxCharLength) {
return length;
}
for (uint64_t i = 0; i < length; i++) {
if (isUtfStartByte(data[i])) {
chars++;
}
if (chars > maxCharLength) {
return i;
}
}
// everything fits
return length;
}
/**
* Checks if b is the first byte of a UTF-8 character.
*/
inline static bool isUtfStartByte(char b) {
return (b & 0xC0) != 0x80;
}
/**
* Find the start of the last character that ends in the current string.
* @param text the bytes of the utf-8
* @param from the first byte location
* @param until the last byte location
* @return the index of the last character
*/
static uint64_t findLastCharacter(const char * text, uint64_t from, uint64_t until) {
uint64_t posn = until;
/* we don't expect characters more than 5 bytes */
while (posn >= from) {
if (isUtfStartByte(text[posn])) {
return posn;
}
posn -= 1;
}
/* beginning of a valid char not found */
throw std::logic_error(
"Could not truncate string, beginning of a valid char not found");
}
};
class CharColumnWriter : public StringColumnWriter {
public:
CharColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
StringColumnWriter(type, factory, options),
maxLength(type.getMaximumLength()),
padBuffer(*options.getMemoryPool()) {
// utf-8 is currently 4 bytes long, but it could be up to 6
padBuffer.resize(maxLength * 6);
}
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
private:
uint64_t maxLength;
DataBuffer<char> padBuffer;
};
void CharColumnWriter::add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
StringVectorBatch* charsBatch = dynamic_cast<StringVectorBatch*>(&rowBatch);
if (charsBatch == nullptr) {
throw InvalidArgument("Failed to cast to StringVectorBatch");
}
StringColumnStatisticsImpl* strStats =
dynamic_cast<StringColumnStatisticsImpl*>(colIndexStatistics.get());
if (strStats == nullptr) {
throw InvalidArgument("Failed to cast to StringColumnStatisticsImpl");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
char** data = charsBatch->data.data() + offset;
int64_t* length = charsBatch->length.data() + offset;
const char* notNull = charsBatch->hasNulls ?
charsBatch->notNull.data() + offset : nullptr;
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (!notNull || notNull[i]) {
const char * charData = nullptr;
uint64_t originLength = static_cast<uint64_t>(length[i]);
uint64_t charLength = Utf8Utils::charLength(data[i], originLength);
if (charLength >= maxLength) {
charData = data[i];
length[i] = static_cast<int64_t>(
Utf8Utils::truncateBytesTo(maxLength, data[i], originLength));
} else {
charData = padBuffer.data();
// the padding is exactly 1 byte per char
length[i] = length[i] + static_cast<int64_t>(maxLength - charLength);
memcpy(padBuffer.data(), data[i], originLength);
memset(padBuffer.data() + originLength,
' ',
static_cast<size_t>(length[i]) - originLength);
}
if (useDictionary) {
size_t index = dictionary.insert(charData, static_cast<size_t>(length[i]));
dictionary.idxInDictBuffer.push_back(static_cast<int64_t>(index));
} else {
directDataStream->write(charData, static_cast<size_t>(length[i]));
}
if (enableBloomFilter) {
bloomFilter->addBytes(data[i], length[i]);
}
strStats->update(charData, static_cast<size_t>(length[i]));
++count;
}
}
if (!useDictionary) {
directLengthEncoder->add(length, numValues, notNull);
}
strStats->increase(count);
if (count < numValues) {
strStats->setHasNull(true);
}
}
class VarCharColumnWriter : public StringColumnWriter {
public:
VarCharColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
StringColumnWriter(type, factory, options),
maxLength(type.getMaximumLength()) {
// PASS
}
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
private:
uint64_t maxLength;
};
void VarCharColumnWriter::add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
StringVectorBatch* charsBatch = dynamic_cast<StringVectorBatch*>(&rowBatch);
if (charsBatch == nullptr) {
throw InvalidArgument("Failed to cast to StringVectorBatch");
}
StringColumnStatisticsImpl* strStats =
dynamic_cast<StringColumnStatisticsImpl*>(colIndexStatistics.get());
if (strStats == nullptr) {
throw InvalidArgument("Failed to cast to StringColumnStatisticsImpl");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
char* const* data = charsBatch->data.data() + offset;
int64_t* length = charsBatch->length.data() + offset;
const char* notNull = charsBatch->hasNulls ?
charsBatch->notNull.data() + offset : nullptr;
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (!notNull || notNull[i]) {
uint64_t itemLength = Utf8Utils::truncateBytesTo(
maxLength, data[i], static_cast<uint64_t>(length[i]));
length[i] = static_cast<int64_t>(itemLength);
if (useDictionary) {
size_t index = dictionary.insert(data[i], static_cast<size_t>(length[i]));
dictionary.idxInDictBuffer.push_back(static_cast<int64_t>(index));
} else {
directDataStream->write(data[i], static_cast<size_t>(length[i]));
}
if (enableBloomFilter) {
bloomFilter->addBytes(data[i], length[i]);
}
strStats->update(data[i], static_cast<size_t>(length[i]));
++count;
}
}
if (!useDictionary) {
directLengthEncoder->add(length, numValues, notNull);
}
strStats->increase(count);
if (count < numValues) {
strStats->setHasNull(true);
}
}
class BinaryColumnWriter : public StringColumnWriter {
public:
BinaryColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
StringColumnWriter(type, factory, options) {
// PASS
}
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
};
void BinaryColumnWriter::add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
StringVectorBatch* binBatch = dynamic_cast<StringVectorBatch*>(&rowBatch);
if (binBatch == nullptr) {
throw InvalidArgument("Failed to cast to StringVectorBatch");
}
BinaryColumnStatisticsImpl* binStats =
dynamic_cast<BinaryColumnStatisticsImpl*>(colIndexStatistics.get());
if (binStats == nullptr) {
throw InvalidArgument("Failed to cast to BinaryColumnStatisticsImpl");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
char** data = binBatch->data.data() + offset;
int64_t* length = binBatch->length.data() + offset;
const char* notNull = binBatch->hasNulls ?
binBatch->notNull.data() + offset : nullptr;
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
uint64_t unsignedLength = static_cast<uint64_t>(length[i]);
if (!notNull || notNull[i]) {
directDataStream->write(data[i], unsignedLength);
binStats->update(unsignedLength);
++count;
}
}
directLengthEncoder->add(length, numValues, notNull);
binStats->increase(count);
if (count < numValues) {
binStats->setHasNull(true);
}
}
class TimestampColumnWriter : public ColumnWriter {
public:
TimestampColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options);
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
virtual void flush(std::vector<proto::Stream>& streams) override;
virtual uint64_t getEstimatedSize() const override;
virtual void getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const override;
virtual void recordPosition() const override;
protected:
std::unique_ptr<RleEncoder> secRleEncoder, nanoRleEncoder;
private:
RleVersion rleVersion;
const Timezone& timezone;
};
TimestampColumnWriter::TimestampColumnWriter(
const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
ColumnWriter(type, factory, options),
rleVersion(options.getRleVersion()),
timezone(getTimezoneByName("GMT")){
std::unique_ptr<BufferedOutputStream> dataStream =
factory.createStream(proto::Stream_Kind_DATA);
std::unique_ptr<BufferedOutputStream> secondaryStream =
factory.createStream(proto::Stream_Kind_SECONDARY);
secRleEncoder = createRleEncoder(std::move(dataStream),
true,
rleVersion,
memPool,
options.getAlignedBitpacking());
nanoRleEncoder = createRleEncoder(std::move(secondaryStream),
false,
rleVersion,
memPool,
options.getAlignedBitpacking());
if (enableIndex) {
recordPosition();
}
}
// Because the number of nanoseconds often has a large number of trailing zeros,
// the number has trailing decimal zero digits removed and the last three bits
// are used to record how many zeros were removed if the trailing zeros are
// more than 2. Thus 1000 nanoseconds would be serialized as 0x0a and
// 100000 would be serialized as 0x0c.
static int64_t formatNano(int64_t nanos) {
if (nanos == 0) {
return 0;
} else if (nanos % 100 != 0) {
return (nanos) << 3;
} else {
nanos /= 100;
int64_t trailingZeros = 1;
while (nanos % 10 == 0 && trailingZeros < 7) {
nanos /= 10;
trailingZeros += 1;
}
return (nanos) << 3 | trailingZeros;
}
}
void TimestampColumnWriter::add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
TimestampVectorBatch* tsBatch =
dynamic_cast<TimestampVectorBatch*>(&rowBatch);
if (tsBatch == nullptr) {
throw InvalidArgument("Failed to cast to TimestampVectorBatch");
}
TimestampColumnStatisticsImpl* tsStats =
dynamic_cast<TimestampColumnStatisticsImpl*>(colIndexStatistics.get());
if (tsStats == nullptr) {
throw InvalidArgument("Failed to cast to TimestampColumnStatisticsImpl");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
const char* notNull = tsBatch->hasNulls ?
tsBatch->notNull.data() + offset : nullptr;
int64_t *secs = tsBatch->data.data() + offset;
int64_t *nanos = tsBatch->nanoseconds.data() + offset;
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (notNull == nullptr || notNull[i]) {
// TimestampVectorBatch already stores data in UTC
int64_t millsUTC = secs[i] * 1000 + nanos[i] / 1000000;
++count;
if (enableBloomFilter) {
bloomFilter->addLong(millsUTC);
}
tsStats->update(millsUTC);
if (secs[i] < 0 && nanos[i] != 0) {
secs[i] += 1;
}
secs[i] -= timezone.getEpoch();
nanos[i] = formatNano(nanos[i]);
}
}
tsStats->increase(count);
if (count < numValues) {
tsStats->setHasNull(true);
}
secRleEncoder->add(secs, numValues, notNull);
nanoRleEncoder->add(nanos, numValues, notNull);
}
void TimestampColumnWriter::flush(std::vector<proto::Stream>& streams) {
ColumnWriter::flush(streams);
proto::Stream dataStream;
dataStream.set_kind(proto::Stream_Kind_DATA);
dataStream.set_column(static_cast<uint32_t>(columnId));
dataStream.set_length(secRleEncoder->flush());
streams.push_back(dataStream);
proto::Stream secondaryStream;
secondaryStream.set_kind(proto::Stream_Kind_SECONDARY);
secondaryStream.set_column(static_cast<uint32_t>(columnId));
secondaryStream.set_length(nanoRleEncoder->flush());
streams.push_back(secondaryStream);
}
uint64_t TimestampColumnWriter::getEstimatedSize() const {
uint64_t size = ColumnWriter::getEstimatedSize();
size += secRleEncoder->getBufferSize();
size += nanoRleEncoder->getBufferSize();
return size;
}
void TimestampColumnWriter::getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const {
proto::ColumnEncoding encoding;
encoding.set_kind(RleVersionMapper(rleVersion));
encoding.set_dictionarysize(0);
if (enableBloomFilter) {
encoding.set_bloomencoding(BloomFilterVersion::UTF8);
}
encodings.push_back(encoding);
}
void TimestampColumnWriter::recordPosition() const {
ColumnWriter::recordPosition();
secRleEncoder->recordPosition(rowIndexPosition.get());
nanoRleEncoder->recordPosition(rowIndexPosition.get());
}
class DateColumnWriter : public IntegerColumnWriter {
public:
DateColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options);
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
};
DateColumnWriter::DateColumnWriter(
const Type &type,
const StreamsFactory &factory,
const WriterOptions &options) :
IntegerColumnWriter(type, factory, options) {
// PASS
}
void DateColumnWriter::add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
const LongVectorBatch* longBatch =
dynamic_cast<const LongVectorBatch*>(&rowBatch);
if (longBatch == nullptr) {
throw InvalidArgument("Failed to cast to LongVectorBatch");
}
DateColumnStatisticsImpl* dateStats =
dynamic_cast<DateColumnStatisticsImpl*>(colIndexStatistics.get());
if (dateStats == nullptr) {
throw InvalidArgument("Failed to cast to DateColumnStatisticsImpl");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
const int64_t* data = longBatch->data.data() + offset;
const char* notNull = longBatch->hasNulls ?
longBatch->notNull.data() + offset : nullptr;
rleEncoder->add(data, numValues, notNull);
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (!notNull || notNull[i]) {
++count;
dateStats->update(static_cast<int32_t>(data[i]));
if (enableBloomFilter) {
bloomFilter->addLong(data[i]);
}
}
}
dateStats->increase(count);
if (count < numValues) {
dateStats->setHasNull(true);
}
}
class Decimal64ColumnWriter : public ColumnWriter {
public:
static const uint32_t MAX_PRECISION_64 = 18;
static const uint32_t MAX_PRECISION_128 = 38;
Decimal64ColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options);
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
virtual void flush(std::vector<proto::Stream>& streams) override;
virtual uint64_t getEstimatedSize() const override;
virtual void getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const override;
virtual void recordPosition() const override;
protected:
RleVersion rleVersion;
uint64_t precision;
uint64_t scale;
std::unique_ptr<AppendOnlyBufferedStream> valueStream;
std::unique_ptr<RleEncoder> scaleEncoder;
private:
char buffer[10];
};
Decimal64ColumnWriter::Decimal64ColumnWriter(
const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
ColumnWriter(type, factory, options),
rleVersion(options.getRleVersion()),
precision(type.getPrecision()),
scale(type.getScale()) {
valueStream.reset(new AppendOnlyBufferedStream(
factory.createStream(proto::Stream_Kind_DATA)));
std::unique_ptr<BufferedOutputStream> scaleStream =
factory.createStream(proto::Stream_Kind_SECONDARY);
scaleEncoder = createRleEncoder(std::move(scaleStream),
true,
rleVersion,
memPool,
options.getAlignedBitpacking());
if (enableIndex) {
recordPosition();
}
}
void Decimal64ColumnWriter::add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
const Decimal64VectorBatch* decBatch =
dynamic_cast<const Decimal64VectorBatch*>(&rowBatch);
if (decBatch == nullptr) {
throw InvalidArgument("Failed to cast to Decimal64VectorBatch");
}
DecimalColumnStatisticsImpl* decStats =
dynamic_cast<DecimalColumnStatisticsImpl*>(colIndexStatistics.get());
if (decStats == nullptr) {
throw InvalidArgument("Failed to cast to DecimalColumnStatisticsImpl");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
const char* notNull = decBatch->hasNulls ?
decBatch->notNull.data() + offset : nullptr;
const int64_t* values = decBatch->values.data() + offset;
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (!notNull || notNull[i]) {
int64_t val = zigZag(values[i]);
char* data = buffer;
while (true) {
if ((val & ~0x7f) == 0) {
*(data++) = (static_cast<char>(val));
break;
} else {
*(data++) = static_cast<char>(0x80 | (val & 0x7f));
// cast val to unsigned so as to force 0-fill right shift
val = (static_cast<uint64_t>(val) >> 7);
}
}
valueStream->write(buffer, static_cast<size_t>(data - buffer));
++count;
if (enableBloomFilter) {
std::string decimal = Decimal(
values[i], static_cast<int32_t>(scale)).toString(true);
bloomFilter->addBytes(
decimal.c_str(), static_cast<int64_t>(decimal.size()));
}
decStats->update(Decimal(values[i], static_cast<int32_t>(scale)));
}
}
decStats->increase(count);
if (count < numValues) {
decStats->setHasNull(true);
}
std::vector<int64_t> scales(numValues, static_cast<int64_t>(scale));
scaleEncoder->add(scales.data(), numValues, notNull);
}
void Decimal64ColumnWriter::flush(std::vector<proto::Stream>& streams) {
ColumnWriter::flush(streams);
proto::Stream dataStream;
dataStream.set_kind(proto::Stream_Kind_DATA);
dataStream.set_column(static_cast<uint32_t>(columnId));
dataStream.set_length(valueStream->flush());
streams.push_back(dataStream);
proto::Stream secondaryStream;
secondaryStream.set_kind(proto::Stream_Kind_SECONDARY);
secondaryStream.set_column(static_cast<uint32_t>(columnId));
secondaryStream.set_length(scaleEncoder->flush());
streams.push_back(secondaryStream);
}
uint64_t Decimal64ColumnWriter::getEstimatedSize() const {
uint64_t size = ColumnWriter::getEstimatedSize();
size += valueStream->getSize();
size += scaleEncoder->getBufferSize();
return size;
}
void Decimal64ColumnWriter::getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const {
proto::ColumnEncoding encoding;
encoding.set_kind(RleVersionMapper(rleVersion));
encoding.set_dictionarysize(0);
if (enableBloomFilter) {
encoding.set_bloomencoding(BloomFilterVersion::UTF8);
}
encodings.push_back(encoding);
}
void Decimal64ColumnWriter::recordPosition() const {
ColumnWriter::recordPosition();
valueStream->recordPosition(rowIndexPosition.get());
scaleEncoder->recordPosition(rowIndexPosition.get());
}
class Decimal128ColumnWriter : public Decimal64ColumnWriter {
public:
Decimal128ColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options);
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
private:
char buffer[20];
};
Decimal128ColumnWriter::Decimal128ColumnWriter(
const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
Decimal64ColumnWriter(type, factory, options) {
// PASS
}
// Zigzag encoding moves the sign bit to the least significant bit using the
// expression (val « 1) ^ (val » 63) and derives its name from the fact that
// positive and negative numbers alternate once encoded.
Int128 zigZagInt128(const Int128& value) {
bool isNegative = value < 0;
Int128 val = value.abs();
val <<= 1;
if (isNegative) {
val -= 1;
}
return val;
}
void Decimal128ColumnWriter::add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
const Decimal128VectorBatch* decBatch =
dynamic_cast<const Decimal128VectorBatch*>(&rowBatch);
if (decBatch == nullptr) {
throw InvalidArgument("Failed to cast to Decimal128VectorBatch");
}
DecimalColumnStatisticsImpl* decStats =
dynamic_cast<DecimalColumnStatisticsImpl*>(colIndexStatistics.get());
if (decStats == nullptr) {
throw InvalidArgument("Failed to cast to DecimalColumnStatisticsImpl");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
const char* notNull = decBatch->hasNulls ?
decBatch->notNull.data() + offset : nullptr;
const Int128* values = decBatch->values.data() + offset;
// The current encoding of decimal columns stores the integer representation
// of the value as an unbounded length zigzag encoded base 128 varint.
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (!notNull || notNull[i]) {
Int128 val = zigZagInt128(values[i]);
char* data = buffer;
while (true) {
if ((val & ~0x7f) == 0) {
*(data++) = (static_cast<char>(val.getLowBits()));
break;
} else {
*(data++) = static_cast<char>(0x80 | (val.getLowBits() & 0x7f));
val >>= 7;
}
}
valueStream->write(buffer, static_cast<size_t>(data - buffer));
++count;
if (enableBloomFilter) {
std::string decimal = Decimal(
values[i], static_cast<int32_t>(scale)).toString(true);
bloomFilter->addBytes(
decimal.c_str(), static_cast<int64_t>(decimal.size()));
}
decStats->update(Decimal(values[i], static_cast<int32_t>(scale)));
}
}
decStats->increase(count);
if (count < numValues) {
decStats->setHasNull(true);
}
std::vector<int64_t> scales(numValues, static_cast<int64_t>(scale));
scaleEncoder->add(scales.data(), numValues, notNull);
}
class ListColumnWriter : public ColumnWriter {
public:
ListColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options);
~ListColumnWriter() override;
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
virtual void flush(std::vector<proto::Stream>& streams) override;
virtual uint64_t getEstimatedSize() const override;
virtual void getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const override;
virtual void getStripeStatistics(
std::vector<proto::ColumnStatistics>& stats) const override;
virtual void getFileStatistics(
std::vector<proto::ColumnStatistics>& stats) const override;
virtual void mergeStripeStatsIntoFileStats() override;
virtual void mergeRowGroupStatsIntoStripeStats() override;
virtual void createRowIndexEntry() override;
virtual void writeIndex(
std::vector<proto::Stream> &streams) const override;
virtual void recordPosition() const override;
virtual void writeDictionary() override;
virtual void reset() override;
private:
std::unique_ptr<RleEncoder> lengthEncoder;
RleVersion rleVersion;
std::unique_ptr<ColumnWriter> child;
};
ListColumnWriter::ListColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
ColumnWriter(type, factory, options),
rleVersion(options.getRleVersion()){
std::unique_ptr<BufferedOutputStream> lengthStream =
factory.createStream(proto::Stream_Kind_LENGTH);
lengthEncoder = createRleEncoder(std::move(lengthStream),
false,
rleVersion,
memPool,
options.getAlignedBitpacking());
if (type.getSubtypeCount() == 1) {
child = buildWriter(*type.getSubtype(0), factory, options);
}
if (enableIndex) {
recordPosition();
}
}
ListColumnWriter::~ListColumnWriter() {
// PASS
}
void ListColumnWriter::add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
ListVectorBatch* listBatch = dynamic_cast<ListVectorBatch*>(&rowBatch);
if (listBatch == nullptr) {
throw InvalidArgument("Failed to cast to ListVectorBatch");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
int64_t* offsets = listBatch->offsets.data() + offset;
const char* notNull = listBatch->hasNulls ?
listBatch->notNull.data() + offset : nullptr;
uint64_t elemOffset = static_cast<uint64_t>(offsets[0]);
uint64_t totalNumValues = static_cast<uint64_t>(offsets[numValues] - offsets[0]);
// translate offsets to lengths
for (uint64_t i = 0; i != numValues; ++i) {
offsets[i] = offsets[i + 1] - offsets[i];
}
// unnecessary to deal with null as elements are packed together
if (child.get()) {
child->add(*listBatch->elements, elemOffset, totalNumValues, nullptr);
}
lengthEncoder->add(offsets, numValues, notNull);
if (enableIndex) {
if (!notNull) {
colIndexStatistics->increase(numValues);
} else {
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (notNull[i]) {
++count;
if (enableBloomFilter) {
bloomFilter->addLong(offsets[i]);
}
}
}
colIndexStatistics->increase(count);
if (count < numValues) {
colIndexStatistics->setHasNull(true);
}
}
}
}
void ListColumnWriter::flush(std::vector<proto::Stream>& streams) {
ColumnWriter::flush(streams);
proto::Stream stream;
stream.set_kind(proto::Stream_Kind_LENGTH);
stream.set_column(static_cast<uint32_t>(columnId));
stream.set_length(lengthEncoder->flush());
streams.push_back(stream);
if (child.get()) {
child->flush(streams);
}
}
void ListColumnWriter::writeIndex(std::vector<proto::Stream> &streams) const {
ColumnWriter::writeIndex(streams);
if (child.get()) {
child->writeIndex(streams);
}
}
uint64_t ListColumnWriter::getEstimatedSize() const {
uint64_t size = ColumnWriter::getEstimatedSize();
if (child.get()) {
size += lengthEncoder->getBufferSize();
size += child->getEstimatedSize();
}
return size;
}
void ListColumnWriter::getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const {
proto::ColumnEncoding encoding;
encoding.set_kind(RleVersionMapper(rleVersion));
encoding.set_dictionarysize(0);
if (enableBloomFilter) {
encoding.set_bloomencoding(BloomFilterVersion::UTF8);
}
encodings.push_back(encoding);
if (child.get()) {
child->getColumnEncoding(encodings);
}
}
void ListColumnWriter::getStripeStatistics(
std::vector<proto::ColumnStatistics>& stats) const {
ColumnWriter::getStripeStatistics(stats);
if (child.get()) {
child->getStripeStatistics(stats);
}
}
void ListColumnWriter::mergeStripeStatsIntoFileStats() {
ColumnWriter::mergeStripeStatsIntoFileStats();
if (child.get()) {
child->mergeStripeStatsIntoFileStats();
}
}
void ListColumnWriter::getFileStatistics(
std::vector<proto::ColumnStatistics>& stats) const {
ColumnWriter::getFileStatistics(stats);
if (child.get()) {
child->getFileStatistics(stats);
}
}
void ListColumnWriter::mergeRowGroupStatsIntoStripeStats() {
ColumnWriter::mergeRowGroupStatsIntoStripeStats();
if (child.get()) {
child->mergeRowGroupStatsIntoStripeStats();
}
}
void ListColumnWriter::createRowIndexEntry() {
ColumnWriter::createRowIndexEntry();
if (child.get()) {
child->createRowIndexEntry();
}
}
void ListColumnWriter::recordPosition() const {
ColumnWriter::recordPosition();
lengthEncoder->recordPosition(rowIndexPosition.get());
}
void ListColumnWriter::reset() {
ColumnWriter::reset();
if (child) {
child->reset();
}
}
void ListColumnWriter::writeDictionary() {
if (child) {
child->writeDictionary();
}
}
class MapColumnWriter : public ColumnWriter {
public:
MapColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options);
~MapColumnWriter() override;
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
virtual void flush(std::vector<proto::Stream>& streams) override;
virtual uint64_t getEstimatedSize() const override;
virtual void getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const override;
virtual void getStripeStatistics(
std::vector<proto::ColumnStatistics>& stats) const override;
virtual void getFileStatistics(
std::vector<proto::ColumnStatistics>& stats) const override;
virtual void mergeStripeStatsIntoFileStats() override;
virtual void mergeRowGroupStatsIntoStripeStats() override;
virtual void createRowIndexEntry() override;
virtual void writeIndex(
std::vector<proto::Stream> &streams) const override;
virtual void recordPosition() const override;
virtual void writeDictionary() override;
virtual void reset() override;
private:
std::unique_ptr<ColumnWriter> keyWriter;
std::unique_ptr<ColumnWriter> elemWriter;
std::unique_ptr<RleEncoder> lengthEncoder;
RleVersion rleVersion;
};
MapColumnWriter::MapColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
ColumnWriter(type, factory, options),
rleVersion(options.getRleVersion()){
std::unique_ptr<BufferedOutputStream> lengthStream =
factory.createStream(proto::Stream_Kind_LENGTH);
lengthEncoder = createRleEncoder(std::move(lengthStream),
false,
rleVersion,
memPool,
options.getAlignedBitpacking());
if (type.getSubtypeCount() > 0) {
keyWriter = buildWriter(*type.getSubtype(0), factory, options);
}
if (type.getSubtypeCount() > 1) {
elemWriter = buildWriter(*type.getSubtype(1), factory, options);
}
if (enableIndex) {
recordPosition();
}
}
MapColumnWriter::~MapColumnWriter() {
// PASS
}
void MapColumnWriter::add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
MapVectorBatch* mapBatch = dynamic_cast<MapVectorBatch*>(&rowBatch);
if (mapBatch == nullptr) {
throw InvalidArgument("Failed to cast to MapVectorBatch");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
int64_t* offsets = mapBatch->offsets.data() + offset;
const char* notNull = mapBatch->hasNulls ?
mapBatch->notNull.data() + offset : nullptr;
uint64_t elemOffset = static_cast<uint64_t>(offsets[0]);
uint64_t totalNumValues = static_cast<uint64_t>(offsets[numValues] - offsets[0]);
// translate offsets to lengths
for (uint64_t i = 0; i != numValues; ++i) {
offsets[i] = offsets[i + 1] - offsets[i];
}
lengthEncoder->add(offsets, numValues, notNull);
// unnecessary to deal with null as keys and values are packed together
if (keyWriter.get()) {
keyWriter->add(*mapBatch->keys, elemOffset, totalNumValues, nullptr);
}
if (elemWriter.get()) {
elemWriter->add(*mapBatch->elements, elemOffset, totalNumValues, nullptr);
}
if (enableIndex) {
if (!notNull) {
colIndexStatistics->increase(numValues);
} else {
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (notNull[i]) {
++count;
if (enableBloomFilter) {
bloomFilter->addLong(offsets[i]);
}
}
}
colIndexStatistics->increase(count);
if (count < numValues) {
colIndexStatistics->setHasNull(true);
}
}
}
}
void MapColumnWriter::flush(std::vector<proto::Stream>& streams) {
ColumnWriter::flush(streams);
proto::Stream stream;
stream.set_kind(proto::Stream_Kind_LENGTH);
stream.set_column(static_cast<uint32_t>(columnId));
stream.set_length(lengthEncoder->flush());
streams.push_back(stream);
if (keyWriter.get()) {
keyWriter->flush(streams);
}
if (elemWriter.get()) {
elemWriter->flush(streams);
}
}
void MapColumnWriter::writeIndex(
std::vector<proto::Stream> &streams) const {
ColumnWriter::writeIndex(streams);
if (keyWriter.get()) {
keyWriter->writeIndex(streams);
}
if (elemWriter.get()) {
elemWriter->writeIndex(streams);
}
}
uint64_t MapColumnWriter::getEstimatedSize() const {
uint64_t size = ColumnWriter::getEstimatedSize();
size += lengthEncoder->getBufferSize();
if (keyWriter.get()) {
size += keyWriter->getEstimatedSize();
}
if (elemWriter.get()) {
size += elemWriter->getEstimatedSize();
}
return size;
}
void MapColumnWriter::getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const {
proto::ColumnEncoding encoding;
encoding.set_kind(RleVersionMapper(rleVersion));
encoding.set_dictionarysize(0);
if (enableBloomFilter) {
encoding.set_bloomencoding(BloomFilterVersion::UTF8);
}
encodings.push_back(encoding);
if (keyWriter.get()) {
keyWriter->getColumnEncoding(encodings);
}
if (elemWriter.get()) {
elemWriter->getColumnEncoding(encodings);
}
}
void MapColumnWriter::getStripeStatistics(
std::vector<proto::ColumnStatistics>& stats) const {
ColumnWriter::getStripeStatistics(stats);
if (keyWriter.get()) {
keyWriter->getStripeStatistics(stats);
}
if (elemWriter.get()) {
elemWriter->getStripeStatistics(stats);
}
}
void MapColumnWriter::mergeStripeStatsIntoFileStats() {
ColumnWriter::mergeStripeStatsIntoFileStats();
if (keyWriter.get()) {
keyWriter->mergeStripeStatsIntoFileStats();
}
if (elemWriter.get()) {
elemWriter->mergeStripeStatsIntoFileStats();
}
}
void MapColumnWriter::getFileStatistics(
std::vector<proto::ColumnStatistics>& stats) const {
ColumnWriter::getFileStatistics(stats);
if (keyWriter.get()) {
keyWriter->getFileStatistics(stats);
}
if (elemWriter.get()) {
elemWriter->getFileStatistics(stats);
}
}
void MapColumnWriter::mergeRowGroupStatsIntoStripeStats() {
ColumnWriter::mergeRowGroupStatsIntoStripeStats();
if (keyWriter.get()) {
keyWriter->mergeRowGroupStatsIntoStripeStats();
}
if (elemWriter.get()) {
elemWriter->mergeRowGroupStatsIntoStripeStats();
}
}
void MapColumnWriter::createRowIndexEntry() {
ColumnWriter::createRowIndexEntry();
if (keyWriter.get()) {
keyWriter->createRowIndexEntry();
}
if (elemWriter.get()) {
elemWriter->createRowIndexEntry();
}
}
void MapColumnWriter::recordPosition() const {
ColumnWriter::recordPosition();
lengthEncoder->recordPosition(rowIndexPosition.get());
}
void MapColumnWriter::reset() {
ColumnWriter::reset();
if (keyWriter) {
keyWriter->reset();
}
if (elemWriter) {
elemWriter->reset();
}
}
void MapColumnWriter::writeDictionary() {
if (keyWriter) {
keyWriter->writeDictionary();
}
if (elemWriter) {
elemWriter->writeDictionary();
}
}
class UnionColumnWriter : public ColumnWriter {
public:
UnionColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options);
virtual void add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) override;
virtual void flush(std::vector<proto::Stream>& streams) override;
virtual uint64_t getEstimatedSize() const override;
virtual void getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const override;
virtual void getStripeStatistics(
std::vector<proto::ColumnStatistics>& stats) const override;
virtual void getFileStatistics(
std::vector<proto::ColumnStatistics>& stats) const override;
virtual void mergeStripeStatsIntoFileStats() override;
virtual void mergeRowGroupStatsIntoStripeStats() override;
virtual void createRowIndexEntry() override;
virtual void writeIndex(
std::vector<proto::Stream> &streams) const override;
virtual void recordPosition() const override;
virtual void writeDictionary() override;
virtual void reset() override;
private:
std::unique_ptr<ByteRleEncoder> rleEncoder;
std::vector<std::unique_ptr<ColumnWriter>> children;
};
UnionColumnWriter::UnionColumnWriter(const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) :
ColumnWriter(type, factory, options) {
std::unique_ptr<BufferedOutputStream> dataStream =
factory.createStream(proto::Stream_Kind_DATA);
rleEncoder = createByteRleEncoder(std::move(dataStream));
for (uint64_t i = 0; i != type.getSubtypeCount(); ++i) {
children.push_back(buildWriter(*type.getSubtype(i),
factory,
options));
}
if (enableIndex) {
recordPosition();
}
}
void UnionColumnWriter::add(ColumnVectorBatch& rowBatch,
uint64_t offset,
uint64_t numValues,
const char* incomingMask) {
UnionVectorBatch* unionBatch = dynamic_cast<UnionVectorBatch*>(&rowBatch);
if (unionBatch == nullptr) {
throw InvalidArgument("Failed to cast to UnionVectorBatch");
}
ColumnWriter::add(rowBatch, offset, numValues, incomingMask);
const char* notNull = unionBatch->hasNulls ?
unionBatch->notNull.data() + offset : nullptr;
unsigned char * tags = unionBatch->tags.data() + offset;
uint64_t * offsets = unionBatch->offsets.data() + offset;
std::vector<int64_t> childOffset(children.size(), -1);
std::vector<uint64_t> childLength(children.size(), 0);
for (uint64_t i = 0; i != numValues; ++i) {
if (childOffset[tags[i]] == -1) {
childOffset[tags[i]] = static_cast<int64_t>(offsets[i]);
}
++childLength[tags[i]];
}
rleEncoder->add(reinterpret_cast<char*>(tags), numValues, notNull);
for (uint32_t i = 0; i < children.size(); ++i) {
if (childLength[i] > 0) {
children[i]->add(*unionBatch->children[i],
static_cast<uint64_t>(childOffset[i]),
childLength[i], nullptr);
}
}
// update stats
if (enableIndex) {
if (!notNull) {
colIndexStatistics->increase(numValues);
} else {
uint64_t count = 0;
for (uint64_t i = 0; i < numValues; ++i) {
if (notNull[i]) {
++count;
if (enableBloomFilter) {
bloomFilter->addLong(tags[i]);
}
}
}
colIndexStatistics->increase(count);
if (count < numValues) {
colIndexStatistics->setHasNull(true);
}
}
}
}
void UnionColumnWriter::flush(std::vector<proto::Stream>& streams) {
ColumnWriter::flush(streams);
proto::Stream stream;
stream.set_kind(proto::Stream_Kind_DATA);
stream.set_column(static_cast<uint32_t>(columnId));
stream.set_length(rleEncoder->flush());
streams.push_back(stream);
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->flush(streams);
}
}
void UnionColumnWriter::writeIndex(std::vector<proto::Stream> &streams) const {
ColumnWriter::writeIndex(streams);
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->writeIndex(streams);
}
}
uint64_t UnionColumnWriter::getEstimatedSize() const {
uint64_t size = ColumnWriter::getEstimatedSize();
size += rleEncoder->getBufferSize();
for (uint32_t i = 0; i < children.size(); ++i) {
size += children[i]->getEstimatedSize();
}
return size;
}
void UnionColumnWriter::getColumnEncoding(
std::vector<proto::ColumnEncoding>& encodings) const {
proto::ColumnEncoding encoding;
encoding.set_kind(proto::ColumnEncoding_Kind_DIRECT);
encoding.set_dictionarysize(0);
if (enableBloomFilter) {
encoding.set_bloomencoding(BloomFilterVersion::UTF8);
}
encodings.push_back(encoding);
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->getColumnEncoding(encodings);
}
}
void UnionColumnWriter::getStripeStatistics(
std::vector<proto::ColumnStatistics>& stats) const {
ColumnWriter::getStripeStatistics(stats);
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->getStripeStatistics(stats);
}
}
void UnionColumnWriter::mergeStripeStatsIntoFileStats() {
ColumnWriter::mergeStripeStatsIntoFileStats();
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->mergeStripeStatsIntoFileStats();
}
}
void UnionColumnWriter::getFileStatistics(
std::vector<proto::ColumnStatistics>& stats) const {
ColumnWriter::getFileStatistics(stats);
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->getFileStatistics(stats);
}
}
void UnionColumnWriter::mergeRowGroupStatsIntoStripeStats() {
ColumnWriter::mergeRowGroupStatsIntoStripeStats();
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->mergeRowGroupStatsIntoStripeStats();
}
}
void UnionColumnWriter::createRowIndexEntry() {
ColumnWriter::createRowIndexEntry();
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->createRowIndexEntry();
}
}
void UnionColumnWriter::recordPosition() const {
ColumnWriter::recordPosition();
rleEncoder->recordPosition(rowIndexPosition.get());
}
void UnionColumnWriter::reset() {
ColumnWriter::reset();
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->reset();
}
}
void UnionColumnWriter::writeDictionary() {
for (uint32_t i = 0; i < children.size(); ++i) {
children[i]->writeDictionary();
}
}
std::unique_ptr<ColumnWriter> buildWriter(
const Type& type,
const StreamsFactory& factory,
const WriterOptions& options) {
switch (static_cast<int64_t>(type.getKind())) {
case STRUCT:
return std::unique_ptr<ColumnWriter>(
new StructColumnWriter(
type,
factory,
options));
case INT:
case LONG:
case SHORT:
return std::unique_ptr<ColumnWriter>(
new IntegerColumnWriter(
type,
factory,
options));
case BYTE:
return std::unique_ptr<ColumnWriter>(
new ByteColumnWriter(
type,
factory,
options));
case BOOLEAN:
return std::unique_ptr<ColumnWriter>(
new BooleanColumnWriter(
type,
factory,
options));
case DOUBLE:
return std::unique_ptr<ColumnWriter>(
new DoubleColumnWriter(
type,
factory,
options,
false));
case FLOAT:
return std::unique_ptr<ColumnWriter>(
new DoubleColumnWriter(
type,
factory,
options,
true));
case BINARY:
return std::unique_ptr<ColumnWriter>(
new BinaryColumnWriter(
type,
factory,
options));
case STRING:
return std::unique_ptr<ColumnWriter>(
new StringColumnWriter(
type,
factory,
options));
case CHAR:
return std::unique_ptr<ColumnWriter>(
new CharColumnWriter(
type,
factory,
options));
case VARCHAR:
return std::unique_ptr<ColumnWriter>(
new VarCharColumnWriter(
type,
factory,
options));
case DATE:
return std::unique_ptr<ColumnWriter>(
new DateColumnWriter(
type,
factory,
options));
case TIMESTAMP:
return std::unique_ptr<ColumnWriter>(
new TimestampColumnWriter(
type,
factory,
options));
case DECIMAL:
if (type.getPrecision() <= Decimal64ColumnWriter::MAX_PRECISION_64) {
return std::unique_ptr<ColumnWriter>(
new Decimal64ColumnWriter(
type,
factory,
options));
} else if (type.getPrecision() <= Decimal64ColumnWriter::MAX_PRECISION_128) {
return std::unique_ptr<ColumnWriter>(
new Decimal128ColumnWriter(
type,
factory,
options));
} else {
throw NotImplementedYet("Decimal precision more than 38 is not "
"supported");
}
case LIST:
return std::unique_ptr<ColumnWriter>(
new ListColumnWriter(
type,
factory,
options));
case MAP:
return std::unique_ptr<ColumnWriter>(
new MapColumnWriter(
type,
factory,
options));
case UNION:
return std::unique_ptr<ColumnWriter>(
new UnionColumnWriter(
type,
factory,
options));
default:
throw NotImplementedYet("Type is not supported yet for creating "
"ColumnWriter.");
}
}
}