mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-09 18:10:48 +00:00
274 lines
11 KiB
C++
274 lines
11 KiB
C++
#pragma once
|
|
|
|
#include <Core/UUID.h>
|
|
#include <Common/UInt128.h>
|
|
#include <common/DayNum.h>
|
|
|
|
#include "config_formats.h"
|
|
|
|
#include <memory>
|
|
|
|
#if USE_PROTOBUF
|
|
|
|
#include "ProtobufColumnMatcher.h"
|
|
#include <IO/WriteBufferFromString.h>
|
|
#include <boost/noncopyable.hpp>
|
|
#include <Common/PODArray.h>
|
|
|
|
|
|
namespace google
|
|
{
|
|
namespace protobuf
|
|
{
|
|
class Descriptor;
|
|
class FieldDescriptor;
|
|
}
|
|
}
|
|
|
|
namespace DB
|
|
{
|
|
class IAggregateFunction;
|
|
using AggregateFunctionPtr = std::shared_ptr<IAggregateFunction>;
|
|
using ConstAggregateDataPtr = const char *;
|
|
|
|
|
|
/** Serializes a protobuf, tries to cast types if necessarily.
|
|
*/
|
|
class ProtobufWriter : private boost::noncopyable
|
|
{
|
|
public:
|
|
ProtobufWriter(WriteBuffer & out, const google::protobuf::Descriptor * message_type, const std::vector<String> & column_names);
|
|
~ProtobufWriter();
|
|
|
|
/// Should be called at the beginning of writing a message.
|
|
void startMessage();
|
|
|
|
/// Should be called at the end of writing a message.
|
|
void endMessage();
|
|
|
|
/// Prepares for writing values of a field.
|
|
/// Returns true and sets 'column_index' to the corresponding column's index.
|
|
/// Returns false if there are no more fields to write in the message type (call endMessage() in this case).
|
|
bool writeField(size_t & column_index);
|
|
|
|
/// Writes a value. This function should be called one or multiple times after writeField().
|
|
/// Returns false if there are no more place for the values in the protobuf's field.
|
|
/// This can happen if the protobuf's field is not declared as repeated in the protobuf schema.
|
|
bool writeNumber(Int8 value) { return writeValueIfPossible(&IConverter::writeInt8, value); }
|
|
bool writeNumber(UInt8 value) { return writeValueIfPossible(&IConverter::writeUInt8, value); }
|
|
bool writeNumber(Int16 value) { return writeValueIfPossible(&IConverter::writeInt16, value); }
|
|
bool writeNumber(UInt16 value) { return writeValueIfPossible(&IConverter::writeUInt16, value); }
|
|
bool writeNumber(Int32 value) { return writeValueIfPossible(&IConverter::writeInt32, value); }
|
|
bool writeNumber(UInt32 value) { return writeValueIfPossible(&IConverter::writeUInt32, value); }
|
|
bool writeNumber(Int64 value) { return writeValueIfPossible(&IConverter::writeInt64, value); }
|
|
bool writeNumber(UInt64 value) { return writeValueIfPossible(&IConverter::writeUInt64, value); }
|
|
bool writeNumber(UInt128 value) { return writeValueIfPossible(&IConverter::writeUInt128, value); }
|
|
bool writeNumber(Float32 value) { return writeValueIfPossible(&IConverter::writeFloat32, value); }
|
|
bool writeNumber(Float64 value) { return writeValueIfPossible(&IConverter::writeFloat64, value); }
|
|
bool writeString(const StringRef & str) { return writeValueIfPossible(&IConverter::writeString, str); }
|
|
void prepareEnumMapping(const std::vector<std::pair<std::string, Int8>> & enum_values) { current_converter->prepareEnumMapping8(enum_values); }
|
|
void prepareEnumMapping(const std::vector<std::pair<std::string, Int16>> & enum_values) { current_converter->prepareEnumMapping16(enum_values); }
|
|
bool writeEnum(Int8 value) { return writeValueIfPossible(&IConverter::writeEnum8, value); }
|
|
bool writeEnum(Int16 value) { return writeValueIfPossible(&IConverter::writeEnum16, value); }
|
|
bool writeUUID(const UUID & uuid) { return writeValueIfPossible(&IConverter::writeUUID, uuid); }
|
|
bool writeDate(DayNum date) { return writeValueIfPossible(&IConverter::writeDate, date); }
|
|
bool writeDateTime(time_t tm) { return writeValueIfPossible(&IConverter::writeDateTime, tm); }
|
|
bool writeDateTime64(DateTime64 tm, UInt32 scale) { return writeValueIfPossible(&IConverter::writeDateTime64, tm, scale); }
|
|
bool writeDecimal(Decimal32 decimal, UInt32 scale) { return writeValueIfPossible(&IConverter::writeDecimal32, decimal, scale); }
|
|
bool writeDecimal(Decimal64 decimal, UInt32 scale) { return writeValueIfPossible(&IConverter::writeDecimal64, decimal, scale); }
|
|
bool writeDecimal(const Decimal128 & decimal, UInt32 scale) { return writeValueIfPossible(&IConverter::writeDecimal128, decimal, scale); }
|
|
bool writeAggregateFunction(const AggregateFunctionPtr & function, ConstAggregateDataPtr place) { return writeValueIfPossible(&IConverter::writeAggregateFunction, function, place); }
|
|
|
|
private:
|
|
class SimpleWriter
|
|
{
|
|
public:
|
|
SimpleWriter(WriteBuffer & out_);
|
|
~SimpleWriter();
|
|
|
|
void startMessage();
|
|
void endMessage();
|
|
|
|
void startNestedMessage();
|
|
void endNestedMessage(UInt32 field_number, bool is_group, bool skip_if_empty);
|
|
|
|
void writeInt(UInt32 field_number, Int64 value);
|
|
void writeUInt(UInt32 field_number, UInt64 value);
|
|
void writeSInt(UInt32 field_number, Int64 value);
|
|
template <typename T>
|
|
void writeFixed(UInt32 field_number, T value);
|
|
void writeString(UInt32 field_number, const StringRef & str);
|
|
|
|
void startRepeatedPack();
|
|
void addIntToRepeatedPack(Int64 value);
|
|
void addUIntToRepeatedPack(UInt64 value);
|
|
void addSIntToRepeatedPack(Int64 value);
|
|
template <typename T>
|
|
void addFixedToRepeatedPack(T value);
|
|
void endRepeatedPack(UInt32 field_number);
|
|
|
|
private:
|
|
struct Piece
|
|
{
|
|
size_t start;
|
|
size_t end;
|
|
Piece(size_t start_, size_t end_) : start(start_), end(end_) {}
|
|
Piece() = default;
|
|
};
|
|
|
|
struct NestedInfo
|
|
{
|
|
size_t num_pieces_at_start;
|
|
size_t num_bytes_skipped_at_start;
|
|
NestedInfo(size_t num_pieces_at_start_, size_t num_bytes_skipped_at_start_)
|
|
: num_pieces_at_start(num_pieces_at_start_), num_bytes_skipped_at_start(num_bytes_skipped_at_start_)
|
|
{
|
|
}
|
|
};
|
|
|
|
WriteBuffer & out;
|
|
PODArray<UInt8> buffer;
|
|
std::vector<Piece> pieces;
|
|
size_t current_piece_start;
|
|
size_t num_bytes_skipped;
|
|
std::vector<NestedInfo> nested_infos;
|
|
};
|
|
|
|
class IConverter
|
|
{
|
|
public:
|
|
virtual ~IConverter() = default;
|
|
virtual void writeString(const StringRef &) = 0;
|
|
virtual void writeInt8(Int8) = 0;
|
|
virtual void writeUInt8(UInt8) = 0;
|
|
virtual void writeInt16(Int16) = 0;
|
|
virtual void writeUInt16(UInt16) = 0;
|
|
virtual void writeInt32(Int32) = 0;
|
|
virtual void writeUInt32(UInt32) = 0;
|
|
virtual void writeInt64(Int64) = 0;
|
|
virtual void writeUInt64(UInt64) = 0;
|
|
virtual void writeUInt128(const UInt128 &) = 0;
|
|
virtual void writeFloat32(Float32) = 0;
|
|
virtual void writeFloat64(Float64) = 0;
|
|
virtual void prepareEnumMapping8(const std::vector<std::pair<std::string, Int8>> &) = 0;
|
|
virtual void prepareEnumMapping16(const std::vector<std::pair<std::string, Int16>> &) = 0;
|
|
virtual void writeEnum8(Int8) = 0;
|
|
virtual void writeEnum16(Int16) = 0;
|
|
virtual void writeUUID(const UUID &) = 0;
|
|
virtual void writeDate(DayNum) = 0;
|
|
virtual void writeDateTime(time_t) = 0;
|
|
virtual void writeDateTime64(DateTime64, UInt32 scale) = 0;
|
|
virtual void writeDecimal32(Decimal32, UInt32) = 0;
|
|
virtual void writeDecimal64(Decimal64, UInt32) = 0;
|
|
virtual void writeDecimal128(const Decimal128 &, UInt32) = 0;
|
|
virtual void writeAggregateFunction(const AggregateFunctionPtr &, ConstAggregateDataPtr) = 0;
|
|
};
|
|
|
|
class ConverterBaseImpl;
|
|
template <bool skip_null_value>
|
|
class ConverterToString;
|
|
template <int field_type_id, typename ToType, bool skip_null_value, bool pack_repeated>
|
|
class ConverterToNumber;
|
|
template <bool skip_null_value, bool pack_repeated>
|
|
class ConverterToBool;
|
|
template <bool skip_null_value, bool pack_repeated>
|
|
class ConverterToEnum;
|
|
|
|
struct ColumnMatcherTraits
|
|
{
|
|
struct FieldData
|
|
{
|
|
std::unique_ptr<IConverter> converter;
|
|
bool is_required;
|
|
bool is_repeatable;
|
|
bool should_pack_repeated;
|
|
ProtobufColumnMatcher::Message<ColumnMatcherTraits> * repeatable_container_message;
|
|
};
|
|
struct MessageData
|
|
{
|
|
UInt32 parent_field_number;
|
|
bool is_group;
|
|
bool is_required;
|
|
ProtobufColumnMatcher::Message<ColumnMatcherTraits> * repeatable_container_message;
|
|
bool need_repeat;
|
|
};
|
|
};
|
|
using Message = ProtobufColumnMatcher::Message<ColumnMatcherTraits>;
|
|
using Field = ProtobufColumnMatcher::Field<ColumnMatcherTraits>;
|
|
|
|
void setTraitsDataAfterMatchingColumns(Message * message);
|
|
|
|
template <int field_type_id>
|
|
std::unique_ptr<IConverter> createConverter(const google::protobuf::FieldDescriptor * field);
|
|
|
|
template <typename... Params>
|
|
using WriteValueFunctionPtr = void (IConverter::*)(Params...);
|
|
|
|
template <typename... Params, typename... Args>
|
|
bool writeValueIfPossible(WriteValueFunctionPtr<Params...> func, Args &&... args)
|
|
{
|
|
if (num_values && !current_field->data.is_repeatable)
|
|
{
|
|
setNestedMessageNeedsRepeat();
|
|
return false;
|
|
}
|
|
(current_converter->*func)(std::forward<Args>(args)...);
|
|
++num_values;
|
|
return true;
|
|
}
|
|
|
|
void setNestedMessageNeedsRepeat();
|
|
void endWritingField();
|
|
|
|
SimpleWriter simple_writer;
|
|
std::unique_ptr<Message> root_message;
|
|
|
|
Message * current_message;
|
|
size_t current_field_index = 0;
|
|
const Field * current_field = nullptr;
|
|
IConverter * current_converter = nullptr;
|
|
size_t num_values = 0;
|
|
};
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
namespace DB
|
|
{
|
|
class IAggregateFunction;
|
|
using AggregateFunctionPtr = std::shared_ptr<IAggregateFunction>;
|
|
using ConstAggregateDataPtr = const char *;
|
|
|
|
class ProtobufWriter
|
|
{
|
|
public:
|
|
bool writeNumber(Int8 /* value */) { return false; }
|
|
bool writeNumber(UInt8 /* value */) { return false; }
|
|
bool writeNumber(Int16 /* value */) { return false; }
|
|
bool writeNumber(UInt16 /* value */) { return false; }
|
|
bool writeNumber(Int32 /* value */) { return false; }
|
|
bool writeNumber(UInt32 /* value */) { return false; }
|
|
bool writeNumber(Int64 /* value */) { return false; }
|
|
bool writeNumber(UInt64 /* value */) { return false; }
|
|
bool writeNumber(UInt128 /* value */) { return false; }
|
|
bool writeNumber(Float32 /* value */) { return false; }
|
|
bool writeNumber(Float64 /* value */) { return false; }
|
|
bool writeString(const StringRef & /* value */) { return false; }
|
|
void prepareEnumMapping(const std::vector<std::pair<std::string, Int8>> & /* name_value_pairs */) {}
|
|
void prepareEnumMapping(const std::vector<std::pair<std::string, Int16>> & /* name_value_pairs */) {}
|
|
bool writeEnum(Int8 /* value */) { return false; }
|
|
bool writeEnum(Int16 /* value */) { return false; }
|
|
bool writeUUID(const UUID & /* value */) { return false; }
|
|
bool writeDate(DayNum /* date */) { return false; }
|
|
bool writeDateTime(time_t /* tm */) { return false; }
|
|
bool writeDateTime64(DateTime64 /*tm*/, UInt32 /*scale*/) { return false; }
|
|
bool writeDecimal(Decimal32 /* decimal */, UInt32 /* scale */) { return false; }
|
|
bool writeDecimal(Decimal64 /* decimal */, UInt32 /* scale */) { return false; }
|
|
bool writeDecimal(const Decimal128 & /* decimal */, UInt32 /* scale */) { return false; }
|
|
bool writeAggregateFunction(const AggregateFunctionPtr & /* function */, ConstAggregateDataPtr /* place */) { return false; }
|
|
};
|
|
|
|
}
|
|
#endif
|