ClickHouse/dbms/include/DB/Functions/FunctionsDateTime.h

479 lines
19 KiB
C
Raw Normal View History

2011-10-16 04:17:41 +00:00
#pragma once
#include <DB/DataTypes/DataTypesNumberFixed.h>
#include <DB/DataTypes/DataTypeDate.h>
#include <DB/DataTypes/DataTypeDateTime.h>
2012-09-03 04:45:46 +00:00
#include <DB/DataTypes/DataTypeArray.h>
2011-10-16 04:17:41 +00:00
#include <DB/Columns/ColumnConst.h>
2012-09-03 04:45:46 +00:00
#include <DB/Columns/ColumnArray.h>
2011-10-16 04:17:41 +00:00
#include <DB/Functions/IFunction.h>
namespace DB
{
/** Функции работы с датой и временем.
*
* toYear, toMonth, toDayOfMonth, toDayOfWeek, toHour, toMinute, toSecond,
2012-08-31 20:38:05 +00:00
* toMonday, toStartOfMonth, toStartOfYear, toStartOfMinute, toStartOfHour
2011-10-16 04:17:41 +00:00
* toTime,
2012-08-31 20:38:05 +00:00
* now
* TODO: makeDate, makeDateTime
2011-10-16 04:17:41 +00:00
*
* (toDate - расположена в файле FunctionsConversion.h)
*
* Возвращаемые типы:
* toYear -> UInt16
* toMonth, toDayOfMonth, toDayOfWeek, toHour, toMinute, toSecond -> UInt8
2012-08-31 20:38:05 +00:00
* toMonday, toStartOfMonth, toStartOfYear -> Date
* toStartOfMinute, toStartOfHour, toTime, now -> DateTime
2012-09-03 04:45:46 +00:00
*
* А также:
*
* timeSlot(EventTime)
* - округляет время до получаса.
*
* timeSlots(StartTime, Duration)
* - для интервала времени, начинающегося в StartTime и продолжающегося Duration секунд,
* возвращает массив моментов времени, состоящий из округлений вниз до получаса точек из этого интервала.
* Например, timeSlots(toDateTime('2012-01-01 12:20:00'), 600) = [toDateTime('2012-01-01 12:00:00'), toDateTime('2012-01-01 12:30:00')].
* Это нужно для поиска хитов, входящих в соответствующий визит.
2011-10-16 04:17:41 +00:00
*/
2012-09-03 04:45:46 +00:00
#define TIME_SLOT_SIZE 1800
2011-10-16 04:17:41 +00:00
struct ToYearImpl
{
static inline UInt16 execute(UInt32 t, DateLUTSingleton & date_lut) { return date_lut.toYear(t); }
static inline UInt16 execute(UInt16 d, DateLUTSingleton & date_lut) { return date_lut.toYear(DayNum_t(d)); }
2011-10-16 04:17:41 +00:00
};
struct ToMonthImpl
{
static inline UInt8 execute(UInt32 t, DateLUTSingleton & date_lut) { return date_lut.toMonth(t); }
static inline UInt8 execute(UInt16 d, DateLUTSingleton & date_lut) { return date_lut.toMonth(DayNum_t(d)); }
2011-10-16 04:17:41 +00:00
};
struct ToDayOfMonthImpl
{
static inline UInt8 execute(UInt32 t, DateLUTSingleton & date_lut) { return date_lut.toDayOfMonth(t); }
static inline UInt8 execute(UInt16 d, DateLUTSingleton & date_lut) { return date_lut.toDayOfMonth(DayNum_t(d)); }
2011-10-16 04:17:41 +00:00
};
struct ToDayOfWeekImpl
{
static inline UInt8 execute(UInt32 t, DateLUTSingleton & date_lut) { return date_lut.toDayOfWeek(t); }
static inline UInt8 execute(UInt16 d, DateLUTSingleton & date_lut) { return date_lut.toDayOfWeek(DayNum_t(d)); }
2011-10-16 04:17:41 +00:00
};
struct ToHourImpl
{
static inline UInt8 execute(UInt32 t, DateLUTSingleton & date_lut) { return date_lut.toHourInaccurate(t); }
static inline UInt8 execute(UInt16 d, DateLUTSingleton & date_lut)
2011-10-16 04:17:41 +00:00
{
throw Exception("Illegal type Date of argument for function toHour", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
}
};
struct ToMinuteImpl
{
static inline UInt8 execute(UInt32 t, DateLUTSingleton & date_lut) { return date_lut.toMinuteInaccurate(t); }
static inline UInt8 execute(UInt16 d, DateLUTSingleton & date_lut)
2011-10-16 04:17:41 +00:00
{
throw Exception("Illegal type Date of argument for function toMinute", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
}
};
struct ToSecondImpl
{
static inline UInt8 execute(UInt32 t, DateLUTSingleton & date_lut) { return date_lut.toSecondInaccurate(t); }
static inline UInt8 execute(UInt16 d, DateLUTSingleton & date_lut)
2011-10-16 04:17:41 +00:00
{
throw Exception("Illegal type Date of argument for function toSecond", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
}
};
struct ToMondayImpl
{
static inline UInt16 execute(UInt32 t, DateLUTSingleton & date_lut) { return date_lut.toFirstDayNumOfWeek(date_lut.toDayNum(t)); }
static inline UInt16 execute(UInt16 d, DateLUTSingleton & date_lut) { return date_lut.toFirstDayNumOfWeek(DayNum_t(d)); }
2011-10-16 04:17:41 +00:00
};
struct ToStartOfMonthImpl
{
static inline UInt16 execute(UInt32 t, DateLUTSingleton & date_lut) { return date_lut.toFirstDayNumOfMonth(date_lut.toDayNum(t)); }
static inline UInt16 execute(UInt16 d, DateLUTSingleton & date_lut) { return date_lut.toFirstDayNumOfMonth(DayNum_t(d)); }
2011-10-16 04:17:41 +00:00
};
2012-08-31 20:38:05 +00:00
struct ToStartOfYearImpl
{
static inline UInt16 execute(UInt32 t, DateLUTSingleton & date_lut) { return date_lut.toFirstDayNumOfYear(date_lut.toDayNum(t)); }
static inline UInt16 execute(UInt16 d, DateLUTSingleton & date_lut) { return date_lut.toFirstDayNumOfYear(DayNum_t(d)); }
2012-08-31 20:38:05 +00:00
};
2011-10-16 04:17:41 +00:00
struct ToTimeImpl
{
2011-10-16 07:11:36 +00:00
/// При переводе во время, дату будем приравнивать к 1970-01-02.
static inline UInt32 execute(UInt32 t, DateLUTSingleton & date_lut) { return date_lut.toTimeInaccurate(t) + 86400; }
static inline UInt32 execute(UInt16 d, DateLUTSingleton & date_lut)
2011-10-16 04:17:41 +00:00
{
throw Exception("Illegal type Date of argument for function toTime", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
}
};
2012-08-31 20:38:05 +00:00
struct ToStartOfMinuteImpl
{
static inline UInt32 execute(UInt32 t, DateLUTSingleton & date_lut) { return date_lut.toStartOfMinuteInaccurate(t); }
static inline UInt32 execute(UInt16 d, DateLUTSingleton & date_lut)
2012-08-31 20:38:05 +00:00
{
throw Exception("Illegal type Date of argument for function toStartOfMinute", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
}
};
struct ToStartOfHourImpl
{
static inline UInt32 execute(UInt32 t, DateLUTSingleton & date_lut) { return date_lut.toStartOfHourInaccurate(t); }
static inline UInt32 execute(UInt16 d, DateLUTSingleton & date_lut)
2012-08-31 20:38:05 +00:00
{
throw Exception("Illegal type Date of argument for function toStartOfHour", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
}
};
2011-10-16 04:17:41 +00:00
template <typename FromType, typename ToType, typename Transform, typename Name>
struct DateTimeTransformImpl
{
static void execute(Block & block, const ColumnNumbers & arguments, size_t result)
{
DateLUTSingleton & date_lut = DateLUTSingleton::instance();
2011-10-16 04:17:41 +00:00
if (const ColumnVector<FromType> * col_from = dynamic_cast<const ColumnVector<FromType> *>(&*block.getByPosition(arguments[0]).column))
{
ColumnVector<ToType> * col_to = new ColumnVector<ToType>;
block.getByPosition(result).column = col_to;
const typename ColumnVector<FromType>::Container_t & vec_from = col_from->getData();
typename ColumnVector<ToType>::Container_t & vec_to = col_to->getData();
size_t size = vec_from.size();
vec_to.resize(size);
for (size_t i = 0; i < size; ++i)
vec_to[i] = Transform::execute(vec_from[i], date_lut);
}
else if (const ColumnConst<FromType> * col_from = dynamic_cast<const ColumnConst<FromType> *>(&*block.getByPosition(arguments[0]).column))
{
block.getByPosition(result).column = new ColumnConst<ToType>(col_from->size(), Transform::execute(col_from->getData(), date_lut));
}
else
throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
+ " of first argument of function " + Name::get(),
ErrorCodes::ILLEGAL_COLUMN);
}
};
template <typename ToDataType, typename Transform, typename Name>
class FunctionDateOrDateTimeToSomething : public IFunction
{
public:
/// Получить имя функции.
String getName() const
{
return Name::get();
}
/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
DataTypePtr getReturnType(const DataTypes & arguments) const
{
if (arguments.size() != 1)
throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
2013-06-21 20:34:19 +00:00
+ toString(arguments.size()) + ", should be 1.",
2011-10-16 04:17:41 +00:00
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
return new ToDataType;
}
/// Выполнить функцию над блоком.
void execute(Block & block, const ColumnNumbers & arguments, size_t result)
{
IDataType * from_type = &*block.getByPosition(arguments[0]).type;
if (dynamic_cast<const DataTypeDate *>(from_type))
DateTimeTransformImpl<DataTypeDate::FieldType, typename ToDataType::FieldType, Transform, Name>::execute(block, arguments, result);
else if (dynamic_cast<const DataTypeDateTime * >(from_type))
DateTimeTransformImpl<DataTypeDateTime::FieldType, typename ToDataType::FieldType, Transform, Name>::execute(block, arguments, result);
else
throw Exception("Illegal type " + block.getByPosition(arguments[0]).type->getName() + " of argument of function " + getName(),
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
}
};
2012-08-31 20:38:05 +00:00
/// Получить текущее время. (Оно - константа, вычисляется один раз за весь запрос.)
class FunctionNow : public IFunction
{
public:
/// Получить имя функции.
String getName() const
{
return "now";
}
/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
DataTypePtr getReturnType(const DataTypes & arguments) const
{
if (arguments.size() != 0)
throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
2013-06-21 20:34:19 +00:00
+ toString(arguments.size()) + ", should be 0.",
2012-08-31 20:38:05 +00:00
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
return new DataTypeDateTime;
}
/// Выполнить функцию над блоком.
void execute(Block & block, const ColumnNumbers & arguments, size_t result)
{
block.getByPosition(result).column = new ColumnConstUInt32(
2013-06-08 20:19:29 +00:00
block.rowsInFirstColumn(),
2012-08-31 20:38:05 +00:00
time(0));
}
};
2012-09-03 04:45:46 +00:00
class FunctionTimeSlot : public IFunction
{
public:
/// Получить имя функции.
String getName() const
{
return "timeSlot";
}
/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
DataTypePtr getReturnType(const DataTypes & arguments) const
{
if (arguments.size() != 1)
throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
2013-06-21 20:34:19 +00:00
+ toString(arguments.size()) + ", should be 1.",
2012-09-03 04:45:46 +00:00
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
if (!dynamic_cast<const DataTypeDateTime *>(&*arguments[0]))
throw Exception("Illegal type " + arguments[0]->getName() + " of first argument of function " + getName() + ". Must be DateTime.",
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
return new DataTypeDateTime;
}
/// Выполнить функцию над блоком.
void execute(Block & block, const ColumnNumbers & arguments, size_t result)
{
if (const ColumnUInt32 * times = dynamic_cast<const ColumnUInt32 *>(&*block.getByPosition(arguments[0]).column))
{
ColumnUInt32 * res = new ColumnUInt32;
ColumnUInt32::Container_t & res_vec = res->getData();
const ColumnUInt32::Container_t & vec = times->getData();
size_t size = vec.size();
res_vec.resize(size);
for (size_t i = 0; i < size; ++i)
res_vec[i] = vec[i] / TIME_SLOT_SIZE * TIME_SLOT_SIZE;
block.getByPosition(result).column = res;
}
else if (const ColumnConstUInt32 * const_times = dynamic_cast<const ColumnConstUInt32 *>(&*block.getByPosition(arguments[0]).column))
{
2013-06-08 20:19:29 +00:00
block.getByPosition(result).column = new ColumnConstUInt32(block.rowsInFirstColumn(), const_times->getData() / TIME_SLOT_SIZE * TIME_SLOT_SIZE);
2012-09-03 04:45:46 +00:00
}
else
throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
+ " of argument of function " + getName(),
ErrorCodes::ILLEGAL_COLUMN);
}
};
template <typename DurationType>
struct TimeSlotsImpl
{
static void vector_vector(
const std::vector<UInt32> & starts, const std::vector<DurationType> & durations,
std::vector<UInt32> & result_values, ColumnArray::Offsets_t & result_offsets)
2012-09-03 04:45:46 +00:00
{
size_t size = starts.size();
result_offsets.resize(size);
result_values.reserve(size);
ColumnArray::Offset_t current_offset = 0;
for (size_t i = 0; i < size; ++i)
{
for (UInt32 value = starts[i] / TIME_SLOT_SIZE; value <= (starts[i] + durations[i]) / TIME_SLOT_SIZE; ++value)
{
result_values.push_back(value * TIME_SLOT_SIZE);
++current_offset;
}
result_offsets[i] = current_offset;
}
}
static void vector_constant(
const std::vector<UInt32> & starts, DurationType duration,
std::vector<UInt32> & result_values, ColumnArray::Offsets_t & result_offsets)
2012-09-03 04:45:46 +00:00
{
size_t size = starts.size();
result_offsets.resize(size);
result_values.reserve(size);
ColumnArray::Offset_t current_offset = 0;
for (size_t i = 0; i < size; ++i)
{
for (UInt32 value = starts[i] / TIME_SLOT_SIZE; value <= (starts[i] + duration) / TIME_SLOT_SIZE; ++value)
{
result_values.push_back(value * TIME_SLOT_SIZE);
++current_offset;
}
result_offsets[i] = current_offset;
}
}
static void constant_vector(
UInt32 start, const std::vector<DurationType> & durations,
std::vector<UInt32> & result_values, ColumnArray::Offsets_t & result_offsets)
2012-09-03 04:45:46 +00:00
{
size_t size = durations.size();
result_offsets.resize(size);
result_values.reserve(size);
ColumnArray::Offset_t current_offset = 0;
for (size_t i = 0; i < size; ++i)
{
for (UInt32 value = start / TIME_SLOT_SIZE; value <= (start + durations[i]) / TIME_SLOT_SIZE; ++value)
{
result_values.push_back(value * TIME_SLOT_SIZE);
++current_offset;
}
result_offsets[i] = current_offset;
}
}
static void constant_constant(
UInt32 start, DurationType duration,
Array & result)
{
for (UInt32 value = start / TIME_SLOT_SIZE; value <= (start + duration) / TIME_SLOT_SIZE; ++value)
result.push_back(static_cast<UInt64>(value * TIME_SLOT_SIZE));
}
};
class FunctionTimeSlots : public IFunction
{
public:
/// Получить имя функции.
String getName() const
{
return "timeSlots";
}
/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
DataTypePtr getReturnType(const DataTypes & arguments) const
{
if (arguments.size() != 2)
throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
2013-06-21 20:34:19 +00:00
+ toString(arguments.size()) + ", should be 2.",
2012-09-03 04:45:46 +00:00
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
if (!dynamic_cast<const DataTypeDateTime *>(&*arguments[0]))
throw Exception("Illegal type " + arguments[0]->getName() + " of first argument of function " + getName() + ". Must be DateTime.",
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
2012-09-03 06:32:38 +00:00
if (!dynamic_cast<const DataTypeUInt32 *>(&*arguments[1]))
throw Exception("Illegal type " + arguments[1]->getName() + " of second argument of function " + getName() + ". Must be UInt32.",
2012-09-03 04:45:46 +00:00
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
return new DataTypeArray(new DataTypeDateTime);
}
/// Выполнить функцию над блоком.
void execute(Block & block, const ColumnNumbers & arguments, size_t result)
{
const ColumnUInt32 * starts = dynamic_cast<const ColumnUInt32 *>(&*block.getByPosition(arguments[0]).column);
const ColumnConstUInt32 * const_starts = dynamic_cast<const ColumnConstUInt32 *>(&*block.getByPosition(arguments[0]).column);
2012-09-03 06:32:38 +00:00
const ColumnUInt32 * durations = dynamic_cast<const ColumnUInt32 *>(&*block.getByPosition(arguments[1]).column);
const ColumnConstUInt32 * const_durations = dynamic_cast<const ColumnConstUInt32 *>(&*block.getByPosition(arguments[1]).column);
2012-09-03 04:45:46 +00:00
ColumnArray * res = new ColumnArray(new ColumnUInt32);
ColumnUInt32::Container_t & res_values = dynamic_cast<ColumnUInt32 &>(res->getData()).getData();
if (starts && durations)
{
2012-09-03 06:32:38 +00:00
TimeSlotsImpl<UInt32>::vector_vector(starts->getData(), durations->getData(), res_values, res->getOffsets());
2012-09-03 04:45:46 +00:00
block.getByPosition(result).column = res;
}
else if (starts && const_durations)
{
2012-09-03 06:32:38 +00:00
TimeSlotsImpl<UInt32>::vector_constant(starts->getData(), const_durations->getData(), res_values, res->getOffsets());
2012-09-03 04:45:46 +00:00
block.getByPosition(result).column = res;
}
else if (const_starts && durations)
{
2012-09-03 06:32:38 +00:00
TimeSlotsImpl<UInt32>::constant_vector(const_starts->getData(), durations->getData(), res_values, res->getOffsets());
2012-09-03 04:45:46 +00:00
block.getByPosition(result).column = res;
}
else if (const_starts && const_durations)
{
Array const_res;
2012-09-03 06:32:38 +00:00
TimeSlotsImpl<UInt32>::constant_constant(const_starts->getData(), const_durations->getData(), const_res);
2013-06-08 20:19:29 +00:00
block.getByPosition(result).column = new ColumnConstArray(block.rowsInFirstColumn(), const_res, new DataTypeArray(new DataTypeDateTime));
2012-09-03 04:45:46 +00:00
}
else
throw Exception("Illegal columns " + block.getByPosition(arguments[0]).column->getName()
+ ", " + block.getByPosition(arguments[1]).column->getName()
+ " of arguments of function " + getName(),
ErrorCodes::ILLEGAL_COLUMN);
}
};
2011-10-16 04:17:41 +00:00
struct NameToYear { static const char * get() { return "toYear"; } };
struct NameToMonth { static const char * get() { return "toMonth"; } };
struct NameToDayOfMonth { static const char * get() { return "toDayOfMonth"; } };
struct NameToDayOfWeek { static const char * get() { return "toDayOfWeek"; } };
struct NameToHour { static const char * get() { return "toHour"; } };
struct NameToMinute { static const char * get() { return "toMinute"; } };
struct NameToSecond { static const char * get() { return "toSecond"; } };
struct NameToMonday { static const char * get() { return "toMonday"; } };
struct NameToStartOfMonth { static const char * get() { return "toStartOfMonth"; } };
2012-08-31 20:38:05 +00:00
struct NameToStartOfYear { static const char * get() { return "toStartOfYear"; } };
struct NameToStartOfMinute { static const char * get() { return "toStartOfMinute"; } };
struct NameToStartOfHour { static const char * get() { return "toStartOfHour"; } };
2011-10-16 04:17:41 +00:00
struct NameToTime { static const char * get() { return "toTime"; } };
typedef FunctionDateOrDateTimeToSomething<DataTypeUInt16, ToYearImpl, NameToYear> FunctionToYear;
typedef FunctionDateOrDateTimeToSomething<DataTypeUInt8, ToMonthImpl, NameToMonth> FunctionToMonth;
typedef FunctionDateOrDateTimeToSomething<DataTypeUInt8, ToDayOfMonthImpl, NameToDayOfMonth> FunctionToDayOfMonth;
typedef FunctionDateOrDateTimeToSomething<DataTypeUInt8, ToDayOfWeekImpl, NameToDayOfWeek> FunctionToDayOfWeek;
typedef FunctionDateOrDateTimeToSomething<DataTypeUInt8, ToHourImpl, NameToHour> FunctionToHour;
typedef FunctionDateOrDateTimeToSomething<DataTypeUInt8, ToMinuteImpl, NameToMinute> FunctionToMinute;
typedef FunctionDateOrDateTimeToSomething<DataTypeUInt8, ToSecondImpl, NameToSecond> FunctionToSecond;
2012-08-31 20:38:05 +00:00
typedef FunctionDateOrDateTimeToSomething<DataTypeDate, ToMondayImpl, NameToMonday> FunctionToMonday;
typedef FunctionDateOrDateTimeToSomething<DataTypeDate, ToStartOfMonthImpl, NameToStartOfMonth> FunctionToStartOfMonth;
typedef FunctionDateOrDateTimeToSomething<DataTypeDate, ToStartOfYearImpl, NameToStartOfYear> FunctionToStartOfYear;
typedef FunctionDateOrDateTimeToSomething<DataTypeDateTime, ToStartOfMinuteImpl, NameToStartOfMinute> FunctionToStartOfMinute;
typedef FunctionDateOrDateTimeToSomething<DataTypeDateTime, ToStartOfHourImpl, NameToStartOfHour> FunctionToStartOfHour;
2011-10-16 04:17:41 +00:00
typedef FunctionDateOrDateTimeToSomething<DataTypeDateTime, ToTimeImpl, NameToTime> FunctionToTime;
}