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Merge pull request #3624 from yandex/types-clarification

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Fixed code that was not quite correct
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alexey-milovidov 2018-11-20 22:37:10 +03:00 committed by GitHub
commit a41485f69d
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1 changed files with 35 additions and 27 deletions
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62
dbms/src/Core/Field.h
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@ -580,36 +580,44 @@ template <> struct TypeName<Tuple> { static std::string get() { return "Tuple";
template <typename T> struct NearestFieldType;
template <> struct NearestFieldType<UInt8> { using Type = UInt64; };
template <> struct NearestFieldType<UInt16> { using Type = UInt64; };
template <> struct NearestFieldType<UInt32> { using Type = UInt64; };
template <> struct NearestFieldType<UInt64> { using Type = UInt64; };
#ifdef __APPLE__
template <> struct NearestFieldType<time_t> { using Type = UInt64; };
template <> struct NearestFieldType<size_t> { using Type = UInt64; };
#endif
template <> struct NearestFieldType<DayNum> { using Type = UInt64; };
/// char may be signed or unsigned, and behave identically to signed char or unsigned char,
/// but they are always three different types.
/// signedness of char is different in Linux on x86 and Linux on ARM.
template <> struct NearestFieldType<char> { using Type = std::conditional_t<std::is_signed_v<char>, Int64, UInt64>; };
template <> struct NearestFieldType<signed char> { using Type = Int64; };
template <> struct NearestFieldType<unsigned char> { using Type = UInt64; };
template <> struct NearestFieldType<UInt16> { using Type = UInt64; };
template <> struct NearestFieldType<UInt32> { using Type = UInt64; };
template <> struct NearestFieldType<DayNum> { using Type = UInt64; };
template <> struct NearestFieldType<UInt128> { using Type = UInt128; };
template <> struct NearestFieldType<UUID> { using Type = UInt128; };
template <> struct NearestFieldType<Int8> { using Type = Int64; };
template <> struct NearestFieldType<Int16> { using Type = Int64; };
template <> struct NearestFieldType<Int32> { using Type = Int64; };
template <> struct NearestFieldType<Int64> { using Type = Int64; };
template <> struct NearestFieldType<Int128> { using Type = Int128; };
template <> struct NearestFieldType<Decimal32> { using Type = DecimalField<Decimal32>; };
template <> struct NearestFieldType<Decimal64> { using Type = DecimalField<Decimal64>; };
template <> struct NearestFieldType<Decimal128> { using Type = DecimalField<Decimal128>; };
template <> struct NearestFieldType<DecimalField<Decimal32>> { using Type = DecimalField<Decimal32>; };
template <> struct NearestFieldType<DecimalField<Decimal64>> { using Type = DecimalField<Decimal64>; };
template <> struct NearestFieldType<DecimalField<Decimal128>> { using Type = DecimalField<Decimal128>; };
template <> struct NearestFieldType<UUID> { using Type = UInt128; };
template <> struct NearestFieldType<Int16> { using Type = Int64; };
template <> struct NearestFieldType<Int32> { using Type = Int64; };
/// long and long long are always different types that may behave identically or not.
/// This is different on Linux and Mac.
template <> struct NearestFieldType<long> { using Type = Int64; };
template <> struct NearestFieldType<long long> { using Type = Int64; };
template <> struct NearestFieldType<unsigned long> { using Type = UInt64; };
template <> struct NearestFieldType<unsigned long long> { using Type = UInt64; };
template <> struct NearestFieldType<Int128> { using Type = Int128; };
template <> struct NearestFieldType<Decimal32> { using Type = DecimalField<Decimal32>; };
template <> struct NearestFieldType<Decimal64> { using Type = DecimalField<Decimal64>; };
template <> struct NearestFieldType<Decimal128> { using Type = DecimalField<Decimal128>; };
template <> struct NearestFieldType<DecimalField<Decimal32>> { using Type = DecimalField<Decimal32>; };
template <> struct NearestFieldType<DecimalField<Decimal64>> { using Type = DecimalField<Decimal64>; };
template <> struct NearestFieldType<DecimalField<Decimal128>> { using Type = DecimalField<Decimal128>; };
template <> struct NearestFieldType<Float32> { using Type = Float64; };
template <> struct NearestFieldType<Float64> { using Type = Float64; };
template <> struct NearestFieldType<const char*> { using Type = String; };
template <> struct NearestFieldType<String> { using Type = String; };
template <> struct NearestFieldType<Array> { using Type = Array; };
template <> struct NearestFieldType<Tuple> { using Type = Tuple; };
template <> struct NearestFieldType<bool> { using Type = UInt64; };
template <> struct NearestFieldType<Null> { using Type = Null; };
template <> struct NearestFieldType<const char *> { using Type = String; };
template <> struct NearestFieldType<String> { using Type = String; };
template <> struct NearestFieldType<Array> { using Type = Array; };
template <> struct NearestFieldType<Tuple> { using Type = Tuple; };
template <> struct NearestFieldType<bool> { using Type = UInt64; };
template <> struct NearestFieldType<Null> { using Type = Null; };
template <typename T>
decltype(auto) nearestFieldType(T && x)