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Fix DateTime64 from Float

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This commit is contained in:
Azat Khuzhin 2021-02-21 21:09:51 +03:00
parent e1c4ba0169
commit 521537eed8
3 changed files with 32 additions and 2 deletions
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23
src/Functions/FunctionsConversion.h
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@ -516,6 +516,25 @@ struct ToDateTime64TransformSigned
return DecimalUtils::decimalFromComponentsWithMultiplier<DateTime64>(from, 0, scale_multiplier);
}
};
template <typename FromDataType, typename FromType>
struct ToDateTime64TransformFloat
{
static constexpr auto name = "toDateTime64";
const UInt32 scale = 1;
ToDateTime64TransformFloat(UInt32 scale_ = 0)
: scale(scale_)
{}
inline NO_SANITIZE_UNDEFINED DateTime64::NativeType execute(FromType from, const DateLUTImpl &) const
{
if (from < 0)
return 0;
from = std::min<FromType>(from, FromType(0xFFFFFFFF));
return convertToDecimal<FromDataType, DataTypeDateTime64>(from, scale);
}
};
template <typename Name> struct ConvertImpl<DataTypeInt8, DataTypeDateTime64, Name>
: DateTimeTransformImpl<DataTypeInt8, DataTypeDateTime64, ToDateTime64TransformSigned<Int8>> {};
@ -528,9 +547,9 @@ template <typename Name> struct ConvertImpl<DataTypeInt64, DataTypeDateTime64, N
template <typename Name> struct ConvertImpl<DataTypeUInt64, DataTypeDateTime64, Name>
: DateTimeTransformImpl<DataTypeUInt64, DataTypeDateTime64, ToDateTime64TransformUnsigned<UInt64>> {};
template <typename Name> struct ConvertImpl<DataTypeFloat32, DataTypeDateTime64, Name>
: DateTimeTransformImpl<DataTypeFloat32, DataTypeDateTime64, ToDateTime64TransformSigned<Float32>> {};
: DateTimeTransformImpl<DataTypeFloat32, DataTypeDateTime64, ToDateTime64TransformFloat<DataTypeFloat32, Float32>> {};
template <typename Name> struct ConvertImpl<DataTypeFloat64, DataTypeDateTime64, Name>
: DateTimeTransformImpl<DataTypeFloat64, DataTypeDateTime64, ToDateTime64TransformSigned<Float64>> {};
: DateTimeTransformImpl<DataTypeFloat64, DataTypeDateTime64, ToDateTime64TransformFloat<DataTypeFloat64, Float64>> {};
/** Conversion of DateTime64 to Date or DateTime: discards fractional part.
*/

7
tests/queries/0_stateless/01734_datetime64_from_float.reference Normal file
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@ -0,0 +1,7 @@
-- { echo }
SELECT CAST(1111111111.222 AS DateTime64(3));
2005-03-18 04:58:31.222
SELECT toDateTime(1111111111.222, 3);
2005-03-18 04:58:31.222
SELECT toDateTime64(1111111111.222, 3);
2005-03-18 04:58:31.222

4
tests/queries/0_stateless/01734_datetime64_from_float.sql Normal file
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@ -0,0 +1,4 @@
-- { echo }
SELECT CAST(1111111111.222 AS DateTime64(3));
SELECT toDateTime(1111111111.222, 3);
SELECT toDateTime64(1111111111.222, 3);