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#pragma once
#include <yql/essentials/minikql/mkql_node.h>
#include <yql/essentials/public/udf/udf_value.h>
#include <util/generic/vector.h>
namespace NKikimr {
namespace NMiniKQL {
class TPresortCodec {
public:
TPresortCodec() = default;
struct TTypeInfo {
NUdf::EDataSlot Slot;
bool IsOptional;
bool IsDesc;
};
void AddType(NUdf::EDataSlot slot, bool isOptional = false, bool isDesc = false);
protected:
size_t Current = 0;
TVector<TTypeInfo> Types;
};
class TPresortEncoder : public TPresortCodec {
public:
TPresortEncoder() = default;
void Start();
void Start(TStringBuf prefix);
void Encode(const NUdf::TUnboxedValuePod& value);
TStringBuf Finish(); // user must copy
private:
TVector<ui8> Output;
};
class TPresortDecoder : public TPresortCodec {
public:
TPresortDecoder() = default;
void Start(TStringBuf input);
NUdf::TUnboxedValue Decode();
void Finish();
private:
TVector<ui8> Buffer;
TStringBuf Input;
};
class THolderFactory;
class TGenericPresortEncoder {
public:
TGenericPresortEncoder(TType* type);
TStringBuf Encode(const NUdf::TUnboxedValue& value, bool desc); // user must copy
NUdf::TUnboxedValue Decode(TStringBuf buf, bool desc, const THolderFactory& factory);
private:
TType* Type;
TVector<ui8> Output;
TVector<ui8> Buffer;
};
} // NMiniKQL
} // NKikimr
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