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#pragma once
#include <Columns/ColumnVector.h>
#include <Columns/ColumnsNumber.h>
#include <base/types.h>
#include <Core/DecimalFunctions.h>
#include <Functions/DateTimeTransforms.h>
#include <Functions/FunctionHelpers.h>
#include <Functions/extractTimeZoneFromFunctionArguments.h>
#include <Functions/IFunction.h>
#include <Common/Exception.h>
#include <Common/DateLUTImpl.h>
/// The default mode value to use for the WEEK() function
#define DEFAULT_WEEK_MODE 0
namespace DB
{
namespace ErrorCodes
{
extern const int ILLEGAL_COLUMN;
}
/**
* CustomWeek Transformations.
*/
struct ToYearWeekImpl
{
static constexpr auto name = "toYearWeek";
static inline UInt32 execute(Int64 t, UInt8 week_mode, const DateLUTImpl & time_zone)
{
// TODO: ditch toDayNum()
YearWeek yw = time_zone.toYearWeek(time_zone.toDayNum(t), week_mode | static_cast<UInt32>(WeekModeFlag::YEAR));
return yw.first * 100 + yw.second;
}
static inline UInt32 execute(UInt32 t, UInt8 week_mode, const DateLUTImpl & time_zone)
{
YearWeek yw = time_zone.toYearWeek(time_zone.toDayNum(t), week_mode | static_cast<UInt32>(WeekModeFlag::YEAR));
return yw.first * 100 + yw.second;
}
static inline UInt32 execute(Int32 d, UInt8 week_mode, const DateLUTImpl & time_zone)
{
YearWeek yw = time_zone.toYearWeek(ExtendedDayNum (d), week_mode | static_cast<UInt32>(WeekModeFlag::YEAR));
return yw.first * 100 + yw.second;
}
static inline UInt32 execute(UInt16 d, UInt8 week_mode, const DateLUTImpl & time_zone)
{
YearWeek yw = time_zone.toYearWeek(DayNum(d), week_mode | static_cast<UInt32>(WeekModeFlag::YEAR));
return yw.first * 100 + yw.second;
}
using FactorTransform = ZeroTransform;
};
struct ToStartOfWeekImpl
{
static constexpr auto name = "toStartOfWeek";
static inline UInt16 execute(Int64 t, UInt8 week_mode, const DateLUTImpl & time_zone)
{
return time_zone.toFirstDayNumOfWeek(time_zone.toDayNum(t), week_mode);
}
static inline UInt16 execute(UInt32 t, UInt8 week_mode, const DateLUTImpl & time_zone)
{
return time_zone.toFirstDayNumOfWeek(time_zone.toDayNum(t), week_mode);
}
static inline UInt16 execute(Int32 d, UInt8 week_mode, const DateLUTImpl & time_zone)
{
return time_zone.toFirstDayNumOfWeek(ExtendedDayNum(d), week_mode);
}
static inline UInt16 execute(UInt16 d, UInt8 week_mode, const DateLUTImpl & time_zone)
{
return time_zone.toFirstDayNumOfWeek(DayNum(d), week_mode);
}
static inline Int64 executeExtendedResult(Int64 t, UInt8 week_mode, const DateLUTImpl & time_zone)
{
return time_zone.toFirstDayNumOfWeek(time_zone.toDayNum(t), week_mode);
}
static inline Int32 executeExtendedResult(Int32 d, UInt8 week_mode, const DateLUTImpl & time_zone)
{
return time_zone.toFirstDayNumOfWeek(ExtendedDayNum(d), week_mode);
}
using FactorTransform = ZeroTransform;
};
struct ToLastDayOfWeekImpl
{
static constexpr auto name = "toLastDayOfWeek";
static inline UInt16 execute(Int64 t, UInt8 week_mode, const DateLUTImpl & time_zone)
{
return time_zone.toLastDayNumOfWeek(time_zone.toDayNum(t), week_mode);
}
static inline UInt16 execute(UInt32 t, UInt8 week_mode, const DateLUTImpl & time_zone)
{
return time_zone.toLastDayNumOfWeek(time_zone.toDayNum(t), week_mode);
}
static inline UInt16 execute(Int32 d, UInt8 week_mode, const DateLUTImpl & time_zone)
{
return time_zone.toLastDayNumOfWeek(ExtendedDayNum(d), week_mode);
}
static inline UInt16 execute(UInt16 d, UInt8 week_mode, const DateLUTImpl & time_zone)
{
return time_zone.toLastDayNumOfWeek(DayNum(d), week_mode);
}
static inline Int64 executeExtendedResult(Int64 t, UInt8 week_mode, const DateLUTImpl & time_zone)
{
return time_zone.toLastDayNumOfWeek(time_zone.toDayNum(t), week_mode);
}
static inline Int32 executeExtendedResult(Int32 d, UInt8 week_mode, const DateLUTImpl & time_zone)
{
return time_zone.toLastDayNumOfWeek(ExtendedDayNum(d), week_mode);
}
using FactorTransform = ZeroTransform;
};
struct ToWeekImpl
{
static constexpr auto name = "toWeek";
static inline UInt8 execute(Int64 t, UInt8 week_mode, const DateLUTImpl & time_zone)
{
// TODO: ditch conversion to DayNum, since it doesn't support extended range.
YearWeek yw = time_zone.toYearWeek(time_zone.toDayNum(t), week_mode);
return yw.second;
}
static inline UInt8 execute(UInt32 t, UInt8 week_mode, const DateLUTImpl & time_zone)
{
YearWeek yw = time_zone.toYearWeek(time_zone.toDayNum(t), week_mode);
return yw.second;
}
static inline UInt8 execute(Int32 d, UInt8 week_mode, const DateLUTImpl & time_zone)
{
YearWeek yw = time_zone.toYearWeek(ExtendedDayNum(d), week_mode);
return yw.second;
}
static inline UInt8 execute(UInt16 d, UInt8 week_mode, const DateLUTImpl & time_zone)
{
YearWeek yw = time_zone.toYearWeek(DayNum(d), week_mode);
return yw.second;
}
using FactorTransform = ToStartOfYearImpl;
};
template <typename FromType, typename ToType, typename Transform, bool is_extended_result = false>
struct WeekTransformer
{
explicit WeekTransformer(Transform transform_)
: transform(std::move(transform_))
{}
template <typename FromVectorType, typename ToVectorType>
void
vector(const FromVectorType & vec_from, ToVectorType & vec_to, UInt8 week_mode, const DateLUTImpl & time_zone) const
{
using ValueType = typename ToVectorType::value_type;
size_t size = vec_from.size();
vec_to.resize(size);
for (size_t i = 0; i < size; ++i)
{
if constexpr (is_extended_result)
vec_to[i] = static_cast<ValueType>(transform.executeExtendedResult(vec_from[i], week_mode, time_zone));
else
vec_to[i] = static_cast<ValueType>(transform.execute(vec_from[i], week_mode, time_zone));
}
}
private:
const Transform transform;
};
template <typename FromDataType, typename ToDataType, bool is_extended_result = false>
struct CustomWeekTransformImpl
{
template <typename Transform>
static ColumnPtr execute(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t /*input_rows_count*/, Transform transform = {})
{
const auto op = WeekTransformer<typename FromDataType::FieldType, typename ToDataType::FieldType, Transform, is_extended_result>{std::move(transform)};
UInt8 week_mode = DEFAULT_WEEK_MODE;
if (arguments.size() > 1)
{
if (const auto * week_mode_column = checkAndGetColumnConst<ColumnUInt8>(arguments[1].column.get()))
week_mode = week_mode_column->getValue<UInt8>();
}
const DateLUTImpl & time_zone = extractTimeZoneFromFunctionArguments(arguments, 2, 0);
const ColumnPtr source_col = arguments[0].column;
if (const auto * sources = checkAndGetColumn<typename FromDataType::ColumnType>(source_col.get()))
{
auto col_to = ToDataType::ColumnType::create();
op.vector(sources->getData(), col_to->getData(), week_mode, time_zone);
return col_to;
}
else
{
throw Exception(ErrorCodes::ILLEGAL_COLUMN,
"Illegal column {} of first argument of function {}",
arguments[0].column->getName(), Transform::name);
}
}
};
}
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