mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-29 19:12:03 +00:00
471 lines
14 KiB
C++
471 lines
14 KiB
C++
#include <IO/ReadBuffer.h>
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#include <IO/WriteBuffer.h>
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#include <IO/ReadHelpers.h>
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#include <IO/WriteHelpers.h>
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#include <IO/ReadBufferFromString.h>
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#include <IO/readDecimalText.h>
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#include <Core/Field.h>
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#include <Core/DecimalComparison.h>
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#include <Common/FieldVisitors.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int CANNOT_RESTORE_FROM_FIELD_DUMP;
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extern const int DECIMAL_OVERFLOW;
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}
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inline Field getBinaryValue(UInt8 type, ReadBuffer & buf)
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{
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switch (type)
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{
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case Field::Types::Null: {
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return DB::Field();
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}
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case Field::Types::UInt64: {
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UInt64 value;
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DB::readVarUInt(value, buf);
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return value;
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}
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case Field::Types::UInt128: {
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UInt128 value;
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DB::readBinary(value, buf);
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return value;
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}
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case Field::Types::Int64: {
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Int64 value;
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DB::readVarInt(value, buf);
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return value;
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}
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case Field::Types::Float64: {
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Float64 value;
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DB::readFloatBinary(value, buf);
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return value;
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}
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case Field::Types::String: {
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std::string value;
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DB::readStringBinary(value, buf);
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return value;
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}
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case Field::Types::Array: {
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Array value;
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DB::readBinary(value, buf);
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return value;
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}
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case Field::Types::Tuple: {
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Tuple value;
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DB::readBinary(value, buf);
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return value;
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}
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case Field::Types::Map: {
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Map value;
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DB::readBinary(value, buf);
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return value;
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}
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case Field::Types::AggregateFunctionState: {
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AggregateFunctionStateData value;
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DB::readStringBinary(value.name, buf);
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DB::readStringBinary(value.data, buf);
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return value;
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}
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}
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return DB::Field();
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}
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void readBinary(Array & x, ReadBuffer & buf)
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{
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size_t size;
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UInt8 type;
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DB::readBinary(type, buf);
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DB::readBinary(size, buf);
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for (size_t index = 0; index < size; ++index)
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x.push_back(getBinaryValue(type, buf));
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}
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void writeBinary(const Array & x, WriteBuffer & buf)
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{
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UInt8 type = Field::Types::Null;
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size_t size = x.size();
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if (size)
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type = x.front().getType();
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DB::writeBinary(type, buf);
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DB::writeBinary(size, buf);
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for (const auto & elem : x)
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Field::dispatch([&buf] (const auto & value) { DB::FieldVisitorWriteBinary()(value, buf); }, elem);
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}
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void writeText(const Array & x, WriteBuffer & buf)
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{
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DB::String res = applyVisitor(DB::FieldVisitorToString(), DB::Field(x));
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buf.write(res.data(), res.size());
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}
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void readBinary(Tuple & x, ReadBuffer & buf)
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{
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size_t size;
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DB::readBinary(size, buf);
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for (size_t index = 0; index < size; ++index)
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{
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UInt8 type;
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DB::readBinary(type, buf);
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x.push_back(getBinaryValue(type, buf));
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}
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}
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void writeBinary(const Tuple & x, WriteBuffer & buf)
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{
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const size_t size = x.size();
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DB::writeBinary(size, buf);
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for (const auto & elem : x)
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{
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const UInt8 type = elem.getType();
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DB::writeBinary(type, buf);
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Field::dispatch([&buf] (const auto & value) { DB::FieldVisitorWriteBinary()(value, buf); }, elem);
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}
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}
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void writeText(const Tuple & x, WriteBuffer & buf)
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{
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writeFieldText(DB::Field(x), buf);
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}
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void readBinary(Map & x, ReadBuffer & buf)
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{
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size_t size;
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DB::readBinary(size, buf);
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for (size_t index = 0; index < size; ++index)
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{
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UInt8 type;
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DB::readBinary(type, buf);
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x.push_back(getBinaryValue(type, buf));
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}
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}
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void writeBinary(const Map & x, WriteBuffer & buf)
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{
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const size_t size = x.size();
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DB::writeBinary(size, buf);
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for (const auto & elem : x)
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{
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const UInt8 type = elem.getType();
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DB::writeBinary(type, buf);
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Field::dispatch([&buf] (const auto & value) { DB::FieldVisitorWriteBinary()(value, buf); }, elem);
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}
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}
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void writeText(const Map & x, WriteBuffer & buf)
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{
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writeFieldText(DB::Field(x), buf);
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}
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template <typename T>
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void readQuoted(DecimalField<T> & x, ReadBuffer & buf)
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{
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assertChar('\'', buf);
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T value;
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UInt32 scale;
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int32_t exponent;
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uint32_t max_digits = static_cast<uint32_t>(-1);
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readDigits<true>(buf, value, max_digits, exponent, true);
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if (exponent > 0)
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{
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scale = 0;
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if (common::mulOverflow(value.value, DecimalUtils::scaleMultiplier<T>(exponent), value.value))
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throw Exception("Decimal math overflow", ErrorCodes::DECIMAL_OVERFLOW);
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}
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else
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scale = -exponent;
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assertChar('\'', buf);
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x = DecimalField<T>{value, scale};
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}
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template void readQuoted<Decimal32>(DecimalField<Decimal32> & x, ReadBuffer & buf);
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template void readQuoted<Decimal64>(DecimalField<Decimal64> & x, ReadBuffer & buf);
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template void readQuoted<Decimal128>(DecimalField<Decimal128> & x, ReadBuffer & buf);
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template void readQuoted<Decimal256>(DecimalField<Decimal256> & x, ReadBuffer & buf);
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void writeFieldText(const Field & x, WriteBuffer & buf)
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{
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DB::String res = Field::dispatch(DB::FieldVisitorToString(), x);
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buf.write(res.data(), res.size());
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}
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String Field::dump() const
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{
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return applyVisitor(DB::FieldVisitorDump(), *this);
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}
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Field Field::restoreFromDump(const std::string_view & dump_)
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{
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auto show_error = [&dump_]
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{
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throw Exception("Couldn't restore Field from dump: " + String{dump_}, ErrorCodes::CANNOT_RESTORE_FROM_FIELD_DUMP);
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};
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std::string_view dump = dump_;
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trim(dump);
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if (dump == "NULL")
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return {};
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std::string_view prefix = std::string_view{"Int64_"};
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if (dump.starts_with(prefix))
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{
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Int64 value = parseFromString<Int64>(dump.substr(prefix.length()));
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return value;
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}
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prefix = std::string_view{"UInt64_"};
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if (dump.starts_with(prefix))
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{
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UInt64 value = parseFromString<UInt64>(dump.substr(prefix.length()));
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return value;
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}
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prefix = std::string_view{"Int128_"};
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if (dump.starts_with(prefix))
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{
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Int128 value = parseFromString<Int128>(dump.substr(prefix.length()));
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return value;
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}
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prefix = std::string_view{"Int256_"};
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if (dump.starts_with(prefix))
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{
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Int256 value = parseFromString<Int256>(dump.substr(prefix.length()));
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return value;
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}
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prefix = std::string_view{"UInt256_"};
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if (dump.starts_with(prefix))
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{
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UInt256 value = parseFromString<UInt256>(dump.substr(prefix.length()));
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return value;
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}
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prefix = std::string_view{"Float64_"};
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if (dump.starts_with(prefix))
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{
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Float64 value = parseFromString<Float64>(dump.substr(prefix.length()));
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return value;
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}
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prefix = std::string_view{"Decimal32_"};
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if (dump_.starts_with(prefix))
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{
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DecimalField<Decimal32> decimal;
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ReadBufferFromString buf{dump.substr(prefix.length())};
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readQuoted(decimal, buf);
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return decimal;
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}
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prefix = std::string_view{"Decimal64_"};
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if (dump_.starts_with(prefix))
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{
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DecimalField<Decimal64> decimal;
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ReadBufferFromString buf{dump.substr(prefix.length())};
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readQuoted(decimal, buf);
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return decimal;
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}
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prefix = std::string_view{"Decimal128_"};
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if (dump_.starts_with(prefix))
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{
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DecimalField<Decimal128> decimal;
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ReadBufferFromString buf{dump.substr(prefix.length())};
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readQuoted(decimal, buf);
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return decimal;
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}
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prefix = std::string_view{"Decimal256_"};
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if (dump_.starts_with(prefix))
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{
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DecimalField<Decimal256> decimal;
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ReadBufferFromString buf{dump.substr(prefix.length())};
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readQuoted(decimal, buf);
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return decimal;
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}
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prefix = std::string_view{"UUID_"};
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if (dump.starts_with(prefix))
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{
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UUID uuid;
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ReadBufferFromString buf{dump.substr(prefix.length())};
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readQuoted(uuid, buf);
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return uuid;
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}
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if (dump.starts_with("\'"))
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{
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String str;
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ReadBufferFromString buf{dump};
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readQuoted(str, buf);
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return str;
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}
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prefix = std::string_view{"Array_["};
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if (dump.starts_with(prefix))
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{
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std::string_view tail = dump.substr(prefix.length());
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trimLeft(tail);
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Array array;
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while (tail != "]")
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{
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size_t separator = tail.find_first_of(",]");
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if (separator == std::string_view::npos)
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show_error();
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bool comma = (tail[separator] == ',');
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std::string_view element = tail.substr(0, separator);
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tail.remove_prefix(separator);
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if (comma)
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tail.remove_prefix(1);
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trimLeft(tail);
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if (!comma && tail != "]")
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show_error();
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array.push_back(Field::restoreFromDump(element));
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}
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return array;
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}
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prefix = std::string_view{"Tuple_("};
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if (dump.starts_with(prefix))
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{
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std::string_view tail = dump.substr(prefix.length());
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trimLeft(tail);
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Tuple tuple;
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while (tail != ")")
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{
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size_t separator = tail.find_first_of(",)");
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if (separator == std::string_view::npos)
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show_error();
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bool comma = (tail[separator] == ',');
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std::string_view element = tail.substr(0, separator);
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tail.remove_prefix(separator);
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if (comma)
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tail.remove_prefix(1);
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trimLeft(tail);
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if (!comma && tail != ")")
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show_error();
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tuple.push_back(Field::restoreFromDump(element));
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}
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return tuple;
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}
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prefix = std::string_view{"Map_("};
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if (dump.starts_with(prefix))
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{
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std::string_view tail = dump.substr(prefix.length());
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trimLeft(tail);
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Map map;
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while (tail != ")")
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{
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size_t separator = tail.find_first_of(",)");
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if (separator == std::string_view::npos)
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show_error();
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bool comma = (tail[separator] == ',');
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std::string_view element = tail.substr(0, separator);
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tail.remove_prefix(separator);
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if (comma)
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tail.remove_prefix(1);
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trimLeft(tail);
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if (!comma && tail != ")")
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show_error();
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map.push_back(Field::restoreFromDump(element));
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}
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return map;
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}
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prefix = std::string_view{"AggregateFunctionState_("};
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if (dump.starts_with(prefix))
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{
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std::string_view after_prefix = dump.substr(prefix.length());
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size_t comma = after_prefix.find(',');
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size_t end = after_prefix.find(')', comma + 1);
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if ((comma == std::string_view::npos) || (end != after_prefix.length() - 1))
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show_error();
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std::string_view name_view = after_prefix.substr(0, comma);
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std::string_view data_view = after_prefix.substr(comma + 1, end - comma - 1);
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trim(name_view);
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trim(data_view);
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ReadBufferFromString name_buf{name_view};
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ReadBufferFromString data_buf{data_view};
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AggregateFunctionStateData res;
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readQuotedString(res.name, name_buf);
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readQuotedString(res.data, data_buf);
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return res;
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}
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show_error();
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__builtin_unreachable();
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}
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template <typename T>
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static bool decEqual(T x, T y, UInt32 x_scale, UInt32 y_scale)
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{
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using Comparator = DecimalComparison<T, T, EqualsOp>;
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return Comparator::compare(x, y, x_scale, y_scale);
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}
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template <typename T>
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static bool decLess(T x, T y, UInt32 x_scale, UInt32 y_scale)
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{
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using Comparator = DecimalComparison<T, T, LessOp>;
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return Comparator::compare(x, y, x_scale, y_scale);
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}
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template <typename T>
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static bool decLessOrEqual(T x, T y, UInt32 x_scale, UInt32 y_scale)
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{
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using Comparator = DecimalComparison<T, T, LessOrEqualsOp>;
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return Comparator::compare(x, y, x_scale, y_scale);
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}
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template <> bool decimalEqual(Decimal32 x, Decimal32 y, UInt32 x_scale, UInt32 y_scale) { return decEqual(x, y, x_scale, y_scale); }
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template <> bool decimalLess(Decimal32 x, Decimal32 y, UInt32 x_scale, UInt32 y_scale) { return decLess(x, y, x_scale, y_scale); }
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template <> bool decimalLessOrEqual(Decimal32 x, Decimal32 y, UInt32 x_scale, UInt32 y_scale) { return decLessOrEqual(x, y, x_scale, y_scale); }
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template <> bool decimalEqual(Decimal64 x, Decimal64 y, UInt32 x_scale, UInt32 y_scale) { return decEqual(x, y, x_scale, y_scale); }
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template <> bool decimalLess(Decimal64 x, Decimal64 y, UInt32 x_scale, UInt32 y_scale) { return decLess(x, y, x_scale, y_scale); }
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template <> bool decimalLessOrEqual(Decimal64 x, Decimal64 y, UInt32 x_scale, UInt32 y_scale) { return decLessOrEqual(x, y, x_scale, y_scale); }
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template <> bool decimalEqual(Decimal128 x, Decimal128 y, UInt32 x_scale, UInt32 y_scale) { return decEqual(x, y, x_scale, y_scale); }
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template <> bool decimalLess(Decimal128 x, Decimal128 y, UInt32 x_scale, UInt32 y_scale) { return decLess(x, y, x_scale, y_scale); }
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template <> bool decimalLessOrEqual(Decimal128 x, Decimal128 y, UInt32 x_scale, UInt32 y_scale) { return decLessOrEqual(x, y, x_scale, y_scale); }
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template <> bool decimalEqual(Decimal256 x, Decimal256 y, UInt32 x_scale, UInt32 y_scale) { return decEqual(x, y, x_scale, y_scale); }
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template <> bool decimalLess(Decimal256 x, Decimal256 y, UInt32 x_scale, UInt32 y_scale) { return decLess(x, y, x_scale, y_scale); }
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template <> bool decimalLessOrEqual(Decimal256 x, Decimal256 y, UInt32 x_scale, UInt32 y_scale) { return decLessOrEqual(x, y, x_scale, y_scale); }
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template <> bool decimalEqual(DateTime64 x, DateTime64 y, UInt32 x_scale, UInt32 y_scale) { return decEqual(x, y, x_scale, y_scale); }
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template <> bool decimalLess(DateTime64 x, DateTime64 y, UInt32 x_scale, UInt32 y_scale) { return decLess(x, y, x_scale, y_scale); }
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template <> bool decimalLessOrEqual(DateTime64 x, DateTime64 y, UInt32 x_scale, UInt32 y_scale) { return decLessOrEqual(x, y, x_scale, y_scale); }
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inline void writeText(const Null &, WriteBuffer & buf)
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{
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writeText(std::string("NULL"), buf);
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}
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String toString(const Field & x)
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{
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return Field::dispatch(
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[] (const auto & value)
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{
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// Use explicit type to prevent implicit construction of Field and
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// infinite recursion into toString<Field>.
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return toString<decltype(value)>(value);
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},
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x);
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}
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}
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