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1ff7c2ac43
ClickHouse/dbms/Formats/ProtobufWriter.cpp
Ivan 97f2a2213e
Move all folders inside /dbms one level up (#9974) 
* Move some code outside dbms/src folder
* Fix paths
2020-04-02 02:51:21 +03:00

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#include "config_formats.h"
#if USE_PROTOBUF
#include "ProtobufWriter.h"
#include <cassert>
#include <optional>
#include <math.h>
#include <AggregateFunctions/IAggregateFunction.h>
#include <DataTypes/DataTypesDecimal.h>
#include <boost/numeric/conversion/cast.hpp>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/descriptor.pb.h>
#include <IO/ReadHelpers.h>
#include <IO/WriteHelpers.h>
namespace DB
{
namespace ErrorCodes
{
extern const int NOT_IMPLEMENTED;
extern const int NO_DATA_FOR_REQUIRED_PROTOBUF_FIELD;
extern const int PROTOBUF_BAD_CAST;
extern const int PROTOBUF_FIELD_NOT_REPEATED;
}
namespace
{
constexpr size_t MAX_VARINT_SIZE = 10;
constexpr size_t REPEATED_PACK_PADDING = 2 * MAX_VARINT_SIZE;
constexpr size_t NESTED_MESSAGE_PADDING = 2 * MAX_VARINT_SIZE;
// Note: There is a difference between this function and writeVarUInt() from IO/VarInt.h:
// Google protobuf's representation of 64-bit integer contains from 1 to 10 bytes,
// whileas writeVarUInt() writes from 1 to 9 bytes because it omits the tenth byte (which is not necessary to decode actually).
void writeVarint(UInt64 value, WriteBuffer & out)
{
while (value >= 0x80)
{
out.write(static_cast<char>(value | 0x80));
value >>= 7;
}
out.write(static_cast<char>(value));
}
UInt8 * writeVarint(UInt64 value, UInt8 * ptr)
{
while (value >= 0x80)
{
*ptr++ = static_cast<UInt8>(value | 0x80);
value >>= 7;
}
*ptr++ = static_cast<UInt8>(value);
return ptr;
}
void writeVarint(UInt64 value, PODArray<UInt8> & buf)
{
size_t old_size = buf.size();
buf.reserve(old_size + MAX_VARINT_SIZE);
UInt8 * ptr = buf.data() + old_size;
ptr = writeVarint(value, ptr);
buf.resize_assume_reserved(ptr - buf.data());
}
UInt64 encodeZigZag(Int64 value) { return (static_cast<UInt64>(value) << 1) ^ static_cast<UInt64>(value >> 63); }
enum WireType
{
VARINT = 0,
BITS64 = 1,
LENGTH_DELIMITED = 2,
GROUP_START = 3,
GROUP_END = 4,
BITS32 = 5
};
UInt8 * writeFieldNumber(UInt32 field_number, WireType wire_type, UInt8 * ptr)
{
return writeVarint((field_number << 3) | wire_type, ptr);
}
void writeFieldNumber(UInt32 field_number, WireType wire_type, PODArray<UInt8> & buf) { writeVarint((field_number << 3) | wire_type, buf); }
// Should we pack repeated values while storing them.
// It depends on type of the field in the protobuf schema and the syntax of that schema.
bool shouldPackRepeated(const google::protobuf::FieldDescriptor * field)
{
if (!field->is_repeated())
return false;
switch (field->type())
{
case google::protobuf::FieldDescriptor::TYPE_INT32:
case google::protobuf::FieldDescriptor::TYPE_UINT32:
case google::protobuf::FieldDescriptor::TYPE_SINT32:
case google::protobuf::FieldDescriptor::TYPE_INT64:
case google::protobuf::FieldDescriptor::TYPE_UINT64:
case google::protobuf::FieldDescriptor::TYPE_SINT64:
case google::protobuf::FieldDescriptor::TYPE_FIXED32:
case google::protobuf::FieldDescriptor::TYPE_SFIXED32:
case google::protobuf::FieldDescriptor::TYPE_FIXED64:
case google::protobuf::FieldDescriptor::TYPE_SFIXED64:
case google::protobuf::FieldDescriptor::TYPE_FLOAT:
case google::protobuf::FieldDescriptor::TYPE_DOUBLE:
case google::protobuf::FieldDescriptor::TYPE_BOOL:
case google::protobuf::FieldDescriptor::TYPE_ENUM:
break;
default:
return false;
}
if (field->options().has_packed())
return field->options().packed();
return field->file()->syntax() == google::protobuf::FileDescriptor::SYNTAX_PROTO3;
}
// Should we omit null values (zero for numbers / empty string for strings) while storing them.
bool shouldSkipNullValue(const google::protobuf::FieldDescriptor * field)
{
return field->is_optional() && (field->file()->syntax() == google::protobuf::FileDescriptor::SYNTAX_PROTO3);
}
}
// SimpleWriter is an utility class to serialize protobufs.
// Knows nothing about protobuf schemas, just provides useful functions to serialize data.
ProtobufWriter::SimpleWriter::SimpleWriter(WriteBuffer & out_) : out(out_), current_piece_start(0), num_bytes_skipped(0)
{
}
ProtobufWriter::SimpleWriter::~SimpleWriter() = default;
void ProtobufWriter::SimpleWriter::startMessage()
{
}
void ProtobufWriter::SimpleWriter::endMessage()
{
pieces.emplace_back(current_piece_start, buffer.size());
size_t size_of_message = buffer.size() - num_bytes_skipped;
writeVarint(size_of_message, out);
for (const auto & piece : pieces)
if (piece.end > piece.start)
out.write(reinterpret_cast<char *>(&buffer[piece.start]), piece.end - piece.start);
buffer.clear();
pieces.clear();
num_bytes_skipped = 0;
current_piece_start = 0;
}
void ProtobufWriter::SimpleWriter::startNestedMessage()
{
nested_infos.emplace_back(pieces.size(), num_bytes_skipped);
pieces.emplace_back(current_piece_start, buffer.size());
// We skip enough bytes to have place for inserting the field number and the size of the nested message afterwards
// when we finish writing the nested message itself. We don't know the size of the nested message at the point of
// calling startNestedMessage(), that's why we have to do this skipping.
current_piece_start = buffer.size() + NESTED_MESSAGE_PADDING;
buffer.resize(current_piece_start);
num_bytes_skipped = NESTED_MESSAGE_PADDING;
}
void ProtobufWriter::SimpleWriter::endNestedMessage(UInt32 field_number, bool is_group, bool skip_if_empty)
{
const auto & nested_info = nested_infos.back();
size_t num_pieces_at_start = nested_info.num_pieces_at_start;
size_t num_bytes_skipped_at_start = nested_info.num_bytes_skipped_at_start;
nested_infos.pop_back();
auto & piece_before_message = pieces[num_pieces_at_start];
size_t message_start = piece_before_message.end;
size_t message_size = buffer.size() - message_start - num_bytes_skipped;
if (!message_size && skip_if_empty)
{
current_piece_start = piece_before_message.start;
buffer.resize(piece_before_message.end);
pieces.resize(num_pieces_at_start);
num_bytes_skipped = num_bytes_skipped_at_start;
return;
}
size_t num_bytes_inserted;
if (is_group)
{
writeFieldNumber(field_number, GROUP_END, buffer);
UInt8 * ptr = &buffer[piece_before_message.end];
UInt8 * endptr = writeFieldNumber(field_number, GROUP_START, ptr);
num_bytes_inserted = endptr - ptr;
}
else
{
UInt8 * ptr = &buffer[piece_before_message.end];
UInt8 * endptr = writeFieldNumber(field_number, LENGTH_DELIMITED, ptr);
endptr = writeVarint(message_size, endptr);
num_bytes_inserted = endptr - ptr;
}
piece_before_message.end += num_bytes_inserted;
num_bytes_skipped += num_bytes_skipped_at_start - num_bytes_inserted;
}
void ProtobufWriter::SimpleWriter::writeUInt(UInt32 field_number, UInt64 value)
{
size_t old_size = buffer.size();
buffer.reserve(old_size + 2 * MAX_VARINT_SIZE);
UInt8 * ptr = buffer.data() + old_size;
ptr = writeFieldNumber(field_number, VARINT, ptr);
ptr = writeVarint(value, ptr);
buffer.resize_assume_reserved(ptr - buffer.data());
}
void ProtobufWriter::SimpleWriter::writeInt(UInt32 field_number, Int64 value)
{
writeUInt(field_number, static_cast<UInt64>(value));
}
void ProtobufWriter::SimpleWriter::writeSInt(UInt32 field_number, Int64 value)
{
writeUInt(field_number, encodeZigZag(value));
}
template <typename T>
void ProtobufWriter::SimpleWriter::writeFixed(UInt32 field_number, T value)
{
static_assert((sizeof(T) == 4) || (sizeof(T) == 8));
constexpr WireType wire_type = (sizeof(T) == 4) ? BITS32 : BITS64;
size_t old_size = buffer.size();
buffer.reserve(old_size + MAX_VARINT_SIZE + sizeof(T));
UInt8 * ptr = buffer.data() + old_size;
ptr = writeFieldNumber(field_number, wire_type, ptr);
memcpy(ptr, &value, sizeof(T));
ptr += sizeof(T);
buffer.resize_assume_reserved(ptr - buffer.data());
}
void ProtobufWriter::SimpleWriter::writeString(UInt32 field_number, const StringRef & str)
{
size_t old_size = buffer.size();
buffer.reserve(old_size + 2 * MAX_VARINT_SIZE + str.size);
UInt8 * ptr = buffer.data() + old_size;
ptr = writeFieldNumber(field_number, LENGTH_DELIMITED, ptr);
ptr = writeVarint(str.size, ptr);
memcpy(ptr, str.data, str.size);
ptr += str.size;
buffer.resize_assume_reserved(ptr - buffer.data());
}
void ProtobufWriter::SimpleWriter::startRepeatedPack()
{
pieces.emplace_back(current_piece_start, buffer.size());
// We skip enough bytes to have place for inserting the field number and the size of the repeated pack afterwards
// when we finish writing the repeated pack itself. We don't know the size of the repeated pack at the point of
// calling startRepeatedPack(), that's why we have to do this skipping.
current_piece_start = buffer.size() + REPEATED_PACK_PADDING;
buffer.resize(current_piece_start);
num_bytes_skipped += REPEATED_PACK_PADDING;
}
void ProtobufWriter::SimpleWriter::endRepeatedPack(UInt32 field_number)
{
size_t size = buffer.size() - current_piece_start;
if (!size)
{
current_piece_start = pieces.back().start;
buffer.resize(pieces.back().end);
pieces.pop_back();
num_bytes_skipped -= REPEATED_PACK_PADDING;
return;
}
UInt8 * ptr = &buffer[pieces.back().end];
UInt8 * endptr = writeFieldNumber(field_number, LENGTH_DELIMITED, ptr);
endptr = writeVarint(size, endptr);
size_t num_bytes_inserted = endptr - ptr;
pieces.back().end += num_bytes_inserted;
num_bytes_skipped -= num_bytes_inserted;
}
void ProtobufWriter::SimpleWriter::addUIntToRepeatedPack(UInt64 value)
{
writeVarint(value, buffer);
}
void ProtobufWriter::SimpleWriter::addIntToRepeatedPack(Int64 value)
{
writeVarint(static_cast<UInt64>(value), buffer);
}
void ProtobufWriter::SimpleWriter::addSIntToRepeatedPack(Int64 value)
{
writeVarint(encodeZigZag(value), buffer);
}
template <typename T>
void ProtobufWriter::SimpleWriter::addFixedToRepeatedPack(T value)
{
static_assert((sizeof(T) == 4) || (sizeof(T) == 8));
size_t old_size = buffer.size();
buffer.resize(old_size + sizeof(T));
memcpy(buffer.data() + old_size, &value, sizeof(T));
}
// Implementation for a converter from any DB data type to any protobuf field type.
class ProtobufWriter::ConverterBaseImpl : public IConverter
{
public:
ConverterBaseImpl(SimpleWriter & simple_writer_, const google::protobuf::FieldDescriptor * field_)
: simple_writer(simple_writer_), field(field_)
{
field_number = field->number();
}
virtual void writeString(const StringRef &) override { cannotConvertType("String"); }
virtual void writeInt8(Int8) override { cannotConvertType("Int8"); }
virtual void writeUInt8(UInt8) override { cannotConvertType("UInt8"); }
virtual void writeInt16(Int16) override { cannotConvertType("Int16"); }
virtual void writeUInt16(UInt16) override { cannotConvertType("UInt16"); }
virtual void writeInt32(Int32) override { cannotConvertType("Int32"); }
virtual void writeUInt32(UInt32) override { cannotConvertType("UInt32"); }
virtual void writeInt64(Int64) override { cannotConvertType("Int64"); }
virtual void writeUInt64(UInt64) override { cannotConvertType("UInt64"); }
virtual void writeUInt128(const UInt128 &) override { cannotConvertType("UInt128"); }
virtual void writeFloat32(Float32) override { cannotConvertType("Float32"); }
virtual void writeFloat64(Float64) override { cannotConvertType("Float64"); }
virtual void prepareEnumMapping8(const std::vector<std::pair<std::string, Int8>> &) override {}
virtual void prepareEnumMapping16(const std::vector<std::pair<std::string, Int16>> &) override {}
virtual void writeEnum8(Int8) override { cannotConvertType("Enum"); }
virtual void writeEnum16(Int16) override { cannotConvertType("Enum"); }
virtual void writeUUID(const UUID &) override { cannotConvertType("UUID"); }
virtual void writeDate(DayNum) override { cannotConvertType("Date"); }
virtual void writeDateTime(time_t) override { cannotConvertType("DateTime"); }
virtual void writeDateTime64(DateTime64, UInt32) override { cannotConvertType("DateTime64"); }
virtual void writeDecimal32(Decimal32, UInt32) override { cannotConvertType("Decimal32"); }
virtual void writeDecimal64(Decimal64, UInt32) override { cannotConvertType("Decimal64"); }
virtual void writeDecimal128(const Decimal128 &, UInt32) override { cannotConvertType("Decimal128"); }
virtual void writeAggregateFunction(const AggregateFunctionPtr &, ConstAggregateDataPtr) override { cannotConvertType("AggregateFunction"); }
protected:
[[noreturn]] void cannotConvertType(const String & type_name)
{
throw Exception(
"Could not convert data type '" + type_name + "' to protobuf type '" + field->type_name() + "' (field: " + field->name() + ")",
ErrorCodes::PROTOBUF_BAD_CAST);
}
[[noreturn]] void cannotConvertValue(const String & value)
{
throw Exception(
"Could not convert value '" + value + "' to protobuf type '" + field->type_name() + "' (field: " + field->name() + ")",
ErrorCodes::PROTOBUF_BAD_CAST);
}
template <typename To, typename From>
To numericCast(From value)
{
if constexpr (std::is_same_v<To, From>)
return value;
To result;
try
{
result = boost::numeric_cast<To>(value);
}
catch (boost::numeric::bad_numeric_cast &)
{
cannotConvertValue(toString(value));
}
return result;
}
template <typename To>
To parseFromString(const StringRef & str)
{
To result;
try
{
result = ::DB::parse<To>(str.data, str.size);
}
catch (...)
{
cannotConvertValue(str.toString());
}
return result;
}
SimpleWriter & simple_writer;
const google::protobuf::FieldDescriptor * field;
UInt32 field_number;
};
template <bool skip_null_value>
class ProtobufWriter::ConverterToString : public ConverterBaseImpl
{
public:
using ConverterBaseImpl::ConverterBaseImpl;
void writeString(const StringRef & str) override { writeField(str); }
void writeInt8(Int8 value) override { convertToStringAndWriteField(value); }
void writeUInt8(UInt8 value) override { convertToStringAndWriteField(value); }
void writeInt16(Int16 value) override { convertToStringAndWriteField(value); }
void writeUInt16(UInt16 value) override { convertToStringAndWriteField(value); }
void writeInt32(Int32 value) override { convertToStringAndWriteField(value); }
void writeUInt32(UInt32 value) override { convertToStringAndWriteField(value); }
void writeInt64(Int64 value) override { convertToStringAndWriteField(value); }
void writeUInt64(UInt64 value) override { convertToStringAndWriteField(value); }
void writeFloat32(Float32 value) override { convertToStringAndWriteField(value); }
void writeFloat64(Float64 value) override { convertToStringAndWriteField(value); }
void prepareEnumMapping8(const std::vector<std::pair<String, Int8>> & name_value_pairs) override
{
prepareEnumValueToNameMap(name_value_pairs);
}
void prepareEnumMapping16(const std::vector<std::pair<String, Int16>> & name_value_pairs) override
{
prepareEnumValueToNameMap(name_value_pairs);
}
void writeEnum8(Int8 value) override { writeEnum16(value); }
void writeEnum16(Int16 value) override
{
auto it = enum_value_to_name_map->find(value);
if (it == enum_value_to_name_map->end())
cannotConvertValue(toString(value));
writeField(it->second);
}
void writeUUID(const UUID & uuid) override { convertToStringAndWriteField(uuid); }
void writeDate(DayNum date) override { convertToStringAndWriteField(date); }
void writeDateTime(time_t tm) override
{
writeDateTimeText(tm, text_buffer);
writeField(text_buffer.stringRef());
text_buffer.restart();
}
void writeDateTime64(DateTime64 date_time, UInt32 scale) override
{
writeDateTimeText(date_time, scale, text_buffer);
writeField(text_buffer.stringRef());
text_buffer.restart();
}
void writeDecimal32(Decimal32 decimal, UInt32 scale) override { writeDecimal(decimal, scale); }
void writeDecimal64(Decimal64 decimal, UInt32 scale) override { writeDecimal(decimal, scale); }
void writeDecimal128(const Decimal128 & decimal, UInt32 scale) override { writeDecimal(decimal, scale); }
void writeAggregateFunction(const AggregateFunctionPtr & function, ConstAggregateDataPtr place) override
{
function->serialize(place, text_buffer);
writeField(text_buffer.stringRef());
text_buffer.restart();
}
private:
template <typename T>
void convertToStringAndWriteField(T value)
{
writeText(value, text_buffer);
writeField(text_buffer.stringRef());
text_buffer.restart();
}
template <typename T>
void writeDecimal(const Decimal<T> & decimal, UInt32 scale)
{
writeText(decimal, scale, text_buffer);
writeField(text_buffer.stringRef());
text_buffer.restart();
}
template <typename T>
void prepareEnumValueToNameMap(const std::vector<std::pair<String, T>> & name_value_pairs)
{
if (enum_value_to_name_map.has_value())
return;
enum_value_to_name_map.emplace();
for (const auto & name_value_pair : name_value_pairs)
enum_value_to_name_map->emplace(name_value_pair.second, name_value_pair.first);
}
void writeField(const StringRef & str)
{
if constexpr (skip_null_value)
{
if (!str.size)
return;
}
simple_writer.writeString(field_number, str);
}
WriteBufferFromOwnString text_buffer;
std::optional<std::unordered_map<Int16, String>> enum_value_to_name_map;
};
#define PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_STRINGS(field_type_id) \
template <> \
std::unique_ptr<ProtobufWriter::IConverter> ProtobufWriter::createConverter<field_type_id>( \
const google::protobuf::FieldDescriptor * field) \
{ \
if (shouldSkipNullValue(field)) \
return std::make_unique<ConverterToString<true>>(simple_writer, field); \
else \
return std::make_unique<ConverterToString<false>>(simple_writer, field); \
}
PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_STRINGS(google::protobuf::FieldDescriptor::TYPE_STRING)
PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_STRINGS(google::protobuf::FieldDescriptor::TYPE_BYTES)
#undef PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_STRINGS
template <int field_type_id, typename ToType, bool skip_null_value, bool pack_repeated>
class ProtobufWriter::ConverterToNumber : public ConverterBaseImpl
{
public:
using ConverterBaseImpl::ConverterBaseImpl;
void writeString(const StringRef & str) override { writeField(parseFromString<ToType>(str)); }
void writeInt8(Int8 value) override { castNumericAndWriteField(value); }
void writeUInt8(UInt8 value) override { castNumericAndWriteField(value); }
void writeInt16(Int16 value) override { castNumericAndWriteField(value); }
void writeUInt16(UInt16 value) override { castNumericAndWriteField(value); }
void writeInt32(Int32 value) override { castNumericAndWriteField(value); }
void writeUInt32(UInt32 value) override { castNumericAndWriteField(value); }
void writeInt64(Int64 value) override { castNumericAndWriteField(value); }
void writeUInt64(UInt64 value) override { castNumericAndWriteField(value); }
void writeFloat32(Float32 value) override { castNumericAndWriteField(value); }
void writeFloat64(Float64 value) override { castNumericAndWriteField(value); }
void writeEnum8(Int8 value) override { writeEnum16(value); }
void writeEnum16(Int16 value) override
{
if constexpr (!is_integral_v<ToType>)
cannotConvertType("Enum"); // It's not correct to convert enum to floating point.
castNumericAndWriteField(value);
}
void writeDate(DayNum date) override { castNumericAndWriteField(static_cast<UInt16>(date)); }
void writeDateTime(time_t tm) override { castNumericAndWriteField(tm); }
void writeDateTime64(DateTime64 date_time, UInt32 scale) override { writeDecimal(date_time, scale); }
void writeDecimal32(Decimal32 decimal, UInt32 scale) override { writeDecimal(decimal, scale); }
void writeDecimal64(Decimal64 decimal, UInt32 scale) override { writeDecimal(decimal, scale); }
void writeDecimal128(const Decimal128 & decimal, UInt32 scale) override { writeDecimal(decimal, scale); }
private:
template <typename FromType>
void castNumericAndWriteField(FromType value)
{
writeField(numericCast<ToType>(value));
}
template <typename S>
void writeDecimal(const Decimal<S> & decimal, UInt32 scale)
{
castNumericAndWriteField(convertFromDecimal<DataTypeDecimal<Decimal<S>>, DataTypeNumber<ToType>>(decimal.value, scale));
}
void writeField(ToType value)
{
if constexpr (skip_null_value)
{
if (value == 0)
return;
}
if constexpr (((field_type_id == google::protobuf::FieldDescriptor::TYPE_INT32) && std::is_same_v<ToType, Int32>)
|| ((field_type_id == google::protobuf::FieldDescriptor::TYPE_INT64) && std::is_same_v<ToType, Int64>))
{
if constexpr (pack_repeated)
simple_writer.addIntToRepeatedPack(value);
else
simple_writer.writeInt(field_number, value);
}
else if constexpr (((field_type_id == google::protobuf::FieldDescriptor::TYPE_SINT32) && std::is_same_v<ToType, Int32>)
|| ((field_type_id == google::protobuf::FieldDescriptor::TYPE_SINT64) && std::is_same_v<ToType, Int64>))
{
if constexpr (pack_repeated)
simple_writer.addSIntToRepeatedPack(value);
else
simple_writer.writeSInt(field_number, value);
}
else if constexpr (((field_type_id == google::protobuf::FieldDescriptor::TYPE_UINT32) && std::is_same_v<ToType, UInt32>)
|| ((field_type_id == google::protobuf::FieldDescriptor::TYPE_UINT64) && std::is_same_v<ToType, UInt64>))
{
if constexpr (pack_repeated)
simple_writer.addUIntToRepeatedPack(value);
else
simple_writer.writeUInt(field_number, value);
}
else
{
static_assert(((field_type_id == google::protobuf::FieldDescriptor::TYPE_FIXED32) && std::is_same_v<ToType, UInt32>)
|| ((field_type_id == google::protobuf::FieldDescriptor::TYPE_SFIXED32) && std::is_same_v<ToType, Int32>)
|| ((field_type_id == google::protobuf::FieldDescriptor::TYPE_FIXED64) && std::is_same_v<ToType, UInt64>)
|| ((field_type_id == google::protobuf::FieldDescriptor::TYPE_SFIXED64) && std::is_same_v<ToType, Int64>)
|| ((field_type_id == google::protobuf::FieldDescriptor::TYPE_FLOAT) && std::is_same_v<ToType, float>)
|| ((field_type_id == google::protobuf::FieldDescriptor::TYPE_DOUBLE) && std::is_same_v<ToType, double>));
if constexpr (pack_repeated)
simple_writer.addFixedToRepeatedPack(value);
else
simple_writer.writeFixed(field_number, value);
}
}
};
#define PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_NUMBERS(field_type_id, field_type) \
template <> \
std::unique_ptr<ProtobufWriter::IConverter> ProtobufWriter::createConverter<field_type_id>( \
const google::protobuf::FieldDescriptor * field) \
{ \
if (shouldSkipNullValue(field)) \
return std::make_unique<ConverterToNumber<field_type_id, field_type, true, false>>(simple_writer, field); \
else if (shouldPackRepeated(field)) \
return std::make_unique<ConverterToNumber<field_type_id, field_type, false, true>>(simple_writer, field); \
else \
return std::make_unique<ConverterToNumber<field_type_id, field_type, false, false>>(simple_writer, field); \
}
PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_NUMBERS(google::protobuf::FieldDescriptor::TYPE_INT32, Int32);
PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_NUMBERS(google::protobuf::FieldDescriptor::TYPE_SINT32, Int32);
PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_NUMBERS(google::protobuf::FieldDescriptor::TYPE_UINT32, UInt32);
PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_NUMBERS(google::protobuf::FieldDescriptor::TYPE_INT64, Int64);
PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_NUMBERS(google::protobuf::FieldDescriptor::TYPE_SINT64, Int64);
PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_NUMBERS(google::protobuf::FieldDescriptor::TYPE_UINT64, UInt64);
PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_NUMBERS(google::protobuf::FieldDescriptor::TYPE_FIXED32, UInt32);
PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_NUMBERS(google::protobuf::FieldDescriptor::TYPE_SFIXED32, Int32);
PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_NUMBERS(google::protobuf::FieldDescriptor::TYPE_FIXED64, UInt64);
PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_NUMBERS(google::protobuf::FieldDescriptor::TYPE_SFIXED64, Int64);
PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_NUMBERS(google::protobuf::FieldDescriptor::TYPE_FLOAT, float);
PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_NUMBERS(google::protobuf::FieldDescriptor::TYPE_DOUBLE, double);
#undef PROTOBUF_WRITER_CREATE_CONVERTER_SPECIALIZATION_FOR_NUMBERS
template <bool skip_null_value, bool pack_repeated>
class ProtobufWriter::ConverterToBool : public ConverterBaseImpl
{
public:
using ConverterBaseImpl::ConverterBaseImpl;
void writeString(const StringRef & str) override
{
if (str == "true")
writeField(true);
else if (str == "false")
writeField(false);
else
cannotConvertValue(str.toString());
}
void writeInt8(Int8 value) override { convertToBoolAndWriteField(value); }
void writeUInt8(UInt8 value) override { convertToBoolAndWriteField(value); }
void writeInt16(Int16 value) override { convertToBoolAndWriteField(value); }
void writeUInt16(UInt16 value) override { convertToBoolAndWriteField(value); }
void writeInt32(Int32 value) override { convertToBoolAndWriteField(value); }
void writeUInt32(UInt32 value) override { convertToBoolAndWriteField(value); }
void writeInt64(Int64 value) override { convertToBoolAndWriteField(value); }
void writeUInt64(UInt64 value) override { convertToBoolAndWriteField(value); }
void writeFloat32(Float32 value) override { convertToBoolAndWriteField(value); }
void writeFloat64(Float64 value) override { convertToBoolAndWriteField(value); }
void writeDecimal32(Decimal32 decimal, UInt32) override { convertToBoolAndWriteField(decimal.value); }
void writeDecimal64(Decimal64 decimal, UInt32) override { convertToBoolAndWriteField(decimal.value); }
void writeDecimal128(const Decimal128 & decimal, UInt32) override { convertToBoolAndWriteField(decimal.value); }
private:
template <typename T>
void convertToBoolAndWriteField(T value)
{
writeField(static_cast<bool>(value));
}
void writeField(bool b)
{
if constexpr (skip_null_value)
{
if (!b)
return;
}
if constexpr (pack_repeated)
simple_writer.addUIntToRepeatedPack(b);
else
simple_writer.writeUInt(field_number, b);
}
};
template <>
std::unique_ptr<ProtobufWriter::IConverter> ProtobufWriter::createConverter<google::protobuf::FieldDescriptor::TYPE_BOOL>(
const google::protobuf::FieldDescriptor * field)
{
if (shouldSkipNullValue(field))
return std::make_unique<ConverterToBool<true, false>>(simple_writer, field);
else if (shouldPackRepeated(field))
return std::make_unique<ConverterToBool<false, true>>(simple_writer, field);
else
return std::make_unique<ConverterToBool<false, false>>(simple_writer, field);
}
template <bool skip_null_value, bool pack_repeated>
class ProtobufWriter::ConverterToEnum : public ConverterBaseImpl
{
public:
using ConverterBaseImpl::ConverterBaseImpl;
void writeString(const StringRef & str) override
{
prepareEnumNameToPbNumberMap();
auto it = enum_name_to_pbnumber_map->find(str);
if (it == enum_name_to_pbnumber_map->end())
cannotConvertValue(str.toString());
writeField(it->second);
}
void writeInt8(Int8 value) override { convertToEnumAndWriteField(value); }
void writeUInt8(UInt8 value) override { convertToEnumAndWriteField(value); }
void writeInt16(Int16 value) override { convertToEnumAndWriteField(value); }
void writeUInt16(UInt16 value) override { convertToEnumAndWriteField(value); }
void writeInt32(Int32 value) override { convertToEnumAndWriteField(value); }
void writeUInt32(UInt32 value) override { convertToEnumAndWriteField(value); }
void writeInt64(Int64 value) override { convertToEnumAndWriteField(value); }
void writeUInt64(UInt64 value) override { convertToEnumAndWriteField(value); }
void prepareEnumMapping8(const std::vector<std::pair<String, Int8>> & name_value_pairs) override
{
prepareEnumValueToPbNumberMap(name_value_pairs);
}
void prepareEnumMapping16(const std::vector<std::pair<String, Int16>> & name_value_pairs) override
{
prepareEnumValueToPbNumberMap(name_value_pairs);
}
void writeEnum8(Int8 value) override { writeEnum16(value); }
void writeEnum16(Int16 value) override
{
int pbnumber;
if (enum_value_always_equals_pbnumber)
pbnumber = value;
else
{
auto it = enum_value_to_pbnumber_map->find(value);
if (it == enum_value_to_pbnumber_map->end())
cannotConvertValue(toString(value));
pbnumber = it->second;
}
writeField(pbnumber);
}
private:
template <typename T>
void convertToEnumAndWriteField(T value)
{
const auto * enum_descriptor = field->enum_type()->FindValueByNumber(numericCast<int>(value));
if (!enum_descriptor)
cannotConvertValue(toString(value));
writeField(enum_descriptor->number());
}
void prepareEnumNameToPbNumberMap()
{
if (enum_name_to_pbnumber_map.has_value())
return;
enum_name_to_pbnumber_map.emplace();
const auto * enum_type = field->enum_type();
for (int i = 0; i != enum_type->value_count(); ++i)
{
const auto * enum_value = enum_type->value(i);
enum_name_to_pbnumber_map->emplace(enum_value->name(), enum_value->number());
}
}
template <typename T>
void prepareEnumValueToPbNumberMap(const std::vector<std::pair<String, T>> & name_value_pairs)
{
if (enum_value_to_pbnumber_map.has_value())
return;
enum_value_to_pbnumber_map.emplace();
enum_value_always_equals_pbnumber = true;
for (const auto & name_value_pair : name_value_pairs)
{
Int16 value = name_value_pair.second;
const auto * enum_descriptor = field->enum_type()->FindValueByName(name_value_pair.first);
if (enum_descriptor)
{
enum_value_to_pbnumber_map->emplace(value, enum_descriptor->number());
if (value != enum_descriptor->number())
enum_value_always_equals_pbnumber = false;
}
else
enum_value_always_equals_pbnumber = false;
}
}
void writeField(int enum_pbnumber)
{
if constexpr (skip_null_value)
{
if (!enum_pbnumber)
return;
}
if constexpr (pack_repeated)
simple_writer.addUIntToRepeatedPack(enum_pbnumber);
else
simple_writer.writeUInt(field_number, enum_pbnumber);
}
std::optional<std::unordered_map<StringRef, int>> enum_name_to_pbnumber_map;
std::optional<std::unordered_map<Int16, int>> enum_value_to_pbnumber_map;
bool enum_value_always_equals_pbnumber;
};
template <>
std::unique_ptr<ProtobufWriter::IConverter> ProtobufWriter::createConverter<google::protobuf::FieldDescriptor::TYPE_ENUM>(
const google::protobuf::FieldDescriptor * field)
{
if (shouldSkipNullValue(field))
return std::make_unique<ConverterToEnum<true, false>>(simple_writer, field);
else if (shouldPackRepeated(field))
return std::make_unique<ConverterToEnum<false, true>>(simple_writer, field);
else
return std::make_unique<ConverterToEnum<false, false>>(simple_writer, field);
}
ProtobufWriter::ProtobufWriter(
WriteBuffer & out, const google::protobuf::Descriptor * message_type, const std::vector<String> & column_names)
: simple_writer(out)
{
std::vector<const google::protobuf::FieldDescriptor *> field_descriptors_without_match;
root_message = ProtobufColumnMatcher::matchColumns<ColumnMatcherTraits>(column_names, message_type, field_descriptors_without_match);
for (const auto * field_descriptor_without_match : field_descriptors_without_match)
{
if (field_descriptor_without_match->is_required())
throw Exception(
"Output doesn't have a column named '" + field_descriptor_without_match->name()
+ "' which is required to write the output in the protobuf format.",
ErrorCodes::NO_DATA_FOR_REQUIRED_PROTOBUF_FIELD);
}
setTraitsDataAfterMatchingColumns(root_message.get());
}
ProtobufWriter::~ProtobufWriter() = default;
void ProtobufWriter::setTraitsDataAfterMatchingColumns(Message * message)
{
Field * parent_field = message->parent ? &message->parent->fields[message->index_in_parent] : nullptr;
message->data.parent_field_number = parent_field ? parent_field->field_number : 0;
message->data.is_required = parent_field && parent_field->data.is_required;
if (parent_field && parent_field->data.is_repeatable)
message->data.repeatable_container_message = message;
else if (message->parent)
message->data.repeatable_container_message = message->parent->data.repeatable_container_message;
else
message->data.repeatable_container_message = nullptr;
message->data.is_group = parent_field && (parent_field->field_descriptor->type() == google::protobuf::FieldDescriptor::TYPE_GROUP);
for (auto & field : message->fields)
{
field.data.is_repeatable = field.field_descriptor->is_repeated();
field.data.is_required = field.field_descriptor->is_required();
field.data.repeatable_container_message = message->data.repeatable_container_message;
field.data.should_pack_repeated = shouldPackRepeated(field.field_descriptor);
if (field.nested_message)
{
setTraitsDataAfterMatchingColumns(field.nested_message.get());
continue;
}
switch (field.field_descriptor->type())
{
#define PROTOBUF_WRITER_CONVERTER_CREATING_CASE(field_type_id) \
case field_type_id: \
field.data.converter = createConverter<field_type_id>(field.field_descriptor); \
break
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_STRING);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_BYTES);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_INT32);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_SINT32);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_UINT32);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_FIXED32);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_SFIXED32);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_INT64);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_SINT64);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_UINT64);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_FIXED64);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_SFIXED64);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_FLOAT);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_DOUBLE);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_BOOL);
PROTOBUF_WRITER_CONVERTER_CREATING_CASE(google::protobuf::FieldDescriptor::TYPE_ENUM);
#undef PROTOBUF_WRITER_CONVERTER_CREATING_CASE
default:
throw Exception(
String("Protobuf type '") + field.field_descriptor->type_name() + "' isn't supported", ErrorCodes::NOT_IMPLEMENTED);
}
}
}
void ProtobufWriter::startMessage()
{
current_message = root_message.get();
current_field_index = 0;
simple_writer.startMessage();
}
void ProtobufWriter::endMessage()
{
if (!current_message)
return;
endWritingField();
while (current_message->parent)
{
simple_writer.endNestedMessage(
current_message->data.parent_field_number, current_message->data.is_group, !current_message->data.is_required);
current_message = current_message->parent;
}
simple_writer.endMessage();
current_message = nullptr;
}
bool ProtobufWriter::writeField(size_t & column_index)
{
endWritingField();
while (true)
{
if (current_field_index < current_message->fields.size())
{
Field & field = current_message->fields[current_field_index];
if (!field.nested_message)
{
current_field = &current_message->fields[current_field_index];
current_converter = current_field->data.converter.get();
column_index = current_field->column_index;
if (current_field->data.should_pack_repeated)
simple_writer.startRepeatedPack();
return true;
}
simple_writer.startNestedMessage();
current_message = field.nested_message.get();
current_message->data.need_repeat = false;
current_field_index = 0;
continue;
}
if (current_message->parent)
{
simple_writer.endNestedMessage(
current_message->data.parent_field_number, current_message->data.is_group, !current_message->data.is_required);
if (current_message->data.need_repeat)
{
simple_writer.startNestedMessage();
current_message->data.need_repeat = false;
current_field_index = 0;
continue;
}
current_field_index = current_message->index_in_parent + 1;
current_message = current_message->parent;
continue;
}
return false;
}
}
void ProtobufWriter::endWritingField()
{
if (!current_field)
return;
if (current_field->data.should_pack_repeated)
simple_writer.endRepeatedPack(current_field->field_number);
else if ((num_values == 0) && current_field->data.is_required)
throw Exception(
"No data for the required field '" + current_field->field_descriptor->name() + "'",
ErrorCodes::NO_DATA_FOR_REQUIRED_PROTOBUF_FIELD);
current_field = nullptr;
current_converter = nullptr;
num_values = 0;
++current_field_index;
}
void ProtobufWriter::setNestedMessageNeedsRepeat()
{
if (current_field->data.repeatable_container_message)
current_field->data.repeatable_container_message->data.need_repeat = true;
else
throw Exception(
"Cannot write more than single value to the non-repeated field '" + current_field->field_descriptor->name() + "'",
ErrorCodes::PROTOBUF_FIELD_NOT_REPEATED);
}
}
#endif
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