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https://github.com/ClickHouse/ClickHouse.git
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451 lines
18 KiB
C++
451 lines
18 KiB
C++
#include <Functions/IFunction.h>
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#include <Functions/FunctionFactory.h>
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#include <DataTypes/DataTypeDate.h>
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#include <DataTypes/DataTypeDate32.h>
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#include <DataTypes/DataTypeDateTime.h>
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#include <DataTypes/DataTypeDateTime64.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <Columns/ColumnConst.h>
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#include <Columns/ColumnDecimal.h>
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#include <Columns/ColumnsDateTime.h>
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#include <Columns/ColumnsNumber.h>
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#include <Interpreters/castColumn.h>
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#include <Common/DateLUT.h>
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#include <Common/typeid_cast.h>
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#include <array>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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extern const int ILLEGAL_TYPE_OF_ARGUMENT;
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extern const int ARGUMENT_OUT_OF_BOUND;
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}
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namespace
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{
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/// A helper function to simplify comparisons of valid YYYY-MM-DD values for <,>,=
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inline constexpr Int64 YearMonthDayToSingleInt(Int64 year, Int64 month, Int64 day)
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{
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return year * 512 + month * 32 + day;
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}
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/// Common logic to handle numeric arguments like year, month, day, hour, minute, second
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class FunctionWithNumericParamsBase : public IFunction
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{
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public:
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bool isInjective(const ColumnsWithTypeAndName &) const override
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{
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return false; /// invalid argument values and timestamps that are out of supported range are converted into a default value
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}
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
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bool useDefaultImplementationForNulls() const override { return true; }
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bool useDefaultImplementationForConstants() const override { return true; }
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protected:
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template <class AgrumentNames>
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void checkRequiredArguments(const ColumnsWithTypeAndName & arguments, const AgrumentNames & argument_names, const size_t optional_argument_count) const
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{
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if (arguments.size() < argument_names.size() || arguments.size() > argument_names.size() + optional_argument_count)
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throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH,
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"Function {} requires {} to {} arguments, but {} given",
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getName(), argument_names.size(), argument_names.size() + optional_argument_count, arguments.size());
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for (size_t i = 0; i < argument_names.size(); ++i)
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{
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DataTypePtr argument_type = arguments[i].type;
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if (!isNumber(argument_type))
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Argument '{}' for function {} must be a number", std::string(argument_names[i]), getName());
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}
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}
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template <class AgrumentNames>
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void convertRequiredArguments(const ColumnsWithTypeAndName & arguments, const AgrumentNames & argument_names, Columns & converted_arguments) const
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{
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const DataTypePtr converted_argument_type = std::make_shared<DataTypeFloat32>();
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converted_arguments.clear();
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converted_arguments.reserve(arguments.size());
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for (size_t i = 0; i < argument_names.size(); ++i)
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{
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ColumnPtr argument_column = castColumn(arguments[i], converted_argument_type);
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argument_column = argument_column->convertToFullColumnIfConst();
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converted_arguments.push_back(argument_column);
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}
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}
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};
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/// Common implementation for makeDate, makeDate32
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template <typename Traits>
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class FunctionMakeDate : public FunctionWithNumericParamsBase
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{
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private:
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static constexpr std::array<const char*, 3> argument_names = {"year", "month", "day"};
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public:
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static constexpr auto name = Traits::name;
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static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionMakeDate>(); }
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String getName() const override { return name; }
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bool isVariadic() const override { return false; }
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size_t getNumberOfArguments() const override { return argument_names.size(); }
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DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName & arguments) const override
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{
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checkRequiredArguments(arguments, argument_names, 0);
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return std::make_shared<typename Traits::ReturnDataType>();
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}
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
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{
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Columns converted_arguments;
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convertRequiredArguments(arguments, argument_names, converted_arguments);
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auto res_column = Traits::ReturnColumnType::create(input_rows_count);
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auto & result_data = res_column->getData();
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const auto & year_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[0]).getData();
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const auto & month_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[1]).getData();
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const auto & day_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[2]).getData();
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const auto & date_lut = DateLUT::instance();
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for (size_t i = 0; i < input_rows_count; ++i)
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{
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const auto year = year_data[i];
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const auto month = month_data[i];
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const auto day = day_data[i];
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Int32 day_num = 0;
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if (year >= Traits::MIN_YEAR &&
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year <= Traits::MAX_YEAR &&
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month >= 1 && month <= 12 &&
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day >= 1 && day <= 31 &&
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YearMonthDayToSingleInt(static_cast<Int64>(year), static_cast<Int64>(month), static_cast<Int64>(day)) <= Traits::MAX_DATE)
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{
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day_num = date_lut.makeDayNum(static_cast<Int16>(year), static_cast<UInt8>(month), static_cast<UInt8>(day));
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}
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result_data[i] = day_num;
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}
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return res_column;
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}
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};
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/// makeDate(year, month, day)
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struct MakeDateTraits
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{
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static constexpr auto name = "makeDate";
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using ReturnDataType = DataTypeDate;
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using ReturnColumnType = ColumnDate;
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static constexpr auto MIN_YEAR = 1970;
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static constexpr auto MAX_YEAR = 2149;
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/// This date has the maximum day number that fits in 16-bit uint
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static constexpr auto MAX_DATE = YearMonthDayToSingleInt(MAX_YEAR, 6, 6);
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};
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/// makeDate32(year, month, day)
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struct MakeDate32Traits
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{
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static constexpr auto name = "makeDate32";
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using ReturnDataType = DataTypeDate32;
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using ReturnColumnType = ColumnDate32;
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static constexpr auto MIN_YEAR = 1900;
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static constexpr auto MAX_YEAR = 2299;
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static constexpr auto MAX_DATE = YearMonthDayToSingleInt(MAX_YEAR, 12, 31);
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};
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/// Common implementation for makeDateTime, makeDateTime64
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class FunctionMakeDateTimeBase : public FunctionWithNumericParamsBase
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{
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protected:
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static constexpr std::array<const char*, 6> argument_names = {"year", "month", "day", "hour", "minute", "second"};
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public:
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bool isVariadic() const override { return true; }
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size_t getNumberOfArguments() const override { return 0; }
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protected:
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void checkRequiredArguments(const ColumnsWithTypeAndName & arguments, const size_t optional_argument_count) const
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{
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FunctionWithNumericParamsBase::checkRequiredArguments(arguments, argument_names, optional_argument_count);
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}
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void convertRequiredArguments(const ColumnsWithTypeAndName & arguments, Columns & converted_arguments) const
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{
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FunctionWithNumericParamsBase::convertRequiredArguments(arguments, argument_names, converted_arguments);
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}
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template <typename T>
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static Int64 dateTime(T year, T month, T day_of_month, T hour, T minute, T second, const DateLUTImpl & lut)
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{
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/// Note that hour, minute and second are checked against 99 to behave consistently with parsing DateTime from String
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/// E.g. "select cast('1984-01-01 99:99:99' as DateTime);" returns "1984-01-05 04:40:39"
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if (unlikely(std::isnan(year) || std::isnan(month) || std::isnan(day_of_month) ||
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std::isnan(hour) || std::isnan(minute) || std::isnan(second) ||
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year < DATE_LUT_MIN_YEAR || month < 1 || month > 12 || day_of_month < 1 || day_of_month > 31 ||
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hour < 0 || hour > 99 || minute < 0 || minute > 99 || second < 0 || second > 99))
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return minDateTime(lut);
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if (unlikely(year > DATE_LUT_MAX_YEAR))
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return maxDateTime(lut);
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return lut.makeDateTime(
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static_cast<Int16>(year), static_cast<UInt8>(month), static_cast<UInt8>(day_of_month),
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static_cast<UInt8>(hour), static_cast<UInt8>(minute), static_cast<UInt8>(second));
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}
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static Int64 minDateTime(const DateLUTImpl & lut)
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{
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return lut.makeDateTime(DATE_LUT_MIN_YEAR - 1, 1, 1, 0, 0, 0);
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}
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static Int64 maxDateTime(const DateLUTImpl & lut)
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{
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return lut.makeDateTime(DATE_LUT_MAX_YEAR + 1, 1, 1, 23, 59, 59);
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}
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std::string extractTimezone(const ColumnWithTypeAndName & timezone_argument) const
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{
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std::string timezone;
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if (!isStringOrFixedString(timezone_argument.type) || !timezone_argument.column || (timezone_argument.column->size() != 1 && !typeid_cast<const ColumnConst*>(timezone_argument.column.get())))
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Argument 'timezone' for function {} must be const string", getName());
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timezone = timezone_argument.column->getDataAt(0).toString();
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return timezone;
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}
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};
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/// makeDateTime(year, month, day, hour, minute, second, [timezone])
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class FunctionMakeDateTime : public FunctionMakeDateTimeBase
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{
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private:
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static constexpr std::array<const char*, 1> optional_argument_names = {"timezone"};
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public:
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static constexpr auto name = "makeDateTime";
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static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionMakeDateTime>(); }
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String getName() const override { return name; }
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DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName & arguments) const override
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{
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checkRequiredArguments(arguments, optional_argument_names.size());
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/// Optional timezone argument
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std::string timezone;
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if (arguments.size() == argument_names.size() + 1)
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timezone = extractTimezone(arguments.back());
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return std::make_shared<DataTypeDateTime>(timezone);
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}
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
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{
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/// Optional timezone argument
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std::string timezone;
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if (arguments.size() == argument_names.size() + 1)
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timezone = extractTimezone(arguments.back());
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Columns converted_arguments;
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convertRequiredArguments(arguments, converted_arguments);
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auto res_column = ColumnDateTime::create(input_rows_count);
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auto & result_data = res_column->getData();
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const auto & year_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[0]).getData();
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const auto & month_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[1]).getData();
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const auto & day_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[2]).getData();
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const auto & hour_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[3]).getData();
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const auto & minute_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[4]).getData();
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const auto & second_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[5]).getData();
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const auto & date_lut = DateLUT::instance(timezone);
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for (size_t i = 0; i < input_rows_count; ++i)
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{
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const auto year = year_data[i];
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const auto month = month_data[i];
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const auto day = day_data[i];
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const auto hour = hour_data[i];
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const auto minute = minute_data[i];
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const auto second = second_data[i];
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auto date_time = dateTime(year, month, day, hour, minute, second, date_lut);
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if (unlikely(date_time < 0))
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date_time = 0;
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else if (unlikely(date_time > 0x0ffffffffll))
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date_time = 0x0ffffffffll;
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result_data[i] = static_cast<UInt32>(date_time);
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}
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return res_column;
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}
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};
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/// makeDateTime64(year, month, day, hour, minute, second, [fraction], [precision], [timezone])
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class FunctionMakeDateTime64 : public FunctionMakeDateTimeBase
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{
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private:
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static constexpr std::array<const char*, 3> optional_argument_names = {"fraction", "precision", "timezone"};
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static constexpr UInt8 DEFAULT_PRECISION = 3;
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public:
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static constexpr auto name = "makeDateTime64";
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static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionMakeDateTime64>(); }
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String getName() const override { return name; }
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DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName & arguments) const override
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{
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checkRequiredArguments(arguments, optional_argument_names.size());
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if (arguments.size() >= argument_names.size() + 1)
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{
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const auto& fraction_argument = arguments[argument_names.size()];
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if (!isNumber(fraction_argument.type))
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Argument 'fraction' for function {} must be a number", getName());
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}
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/// Optional precision argument
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Int64 precision = DEFAULT_PRECISION;
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if (arguments.size() >= argument_names.size() + 2)
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precision = extractPrecision(arguments[argument_names.size() + 1]);
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/// Optional timezone argument
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std::string timezone;
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if (arguments.size() == argument_names.size() + 3)
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timezone = extractTimezone(arguments.back());
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return std::make_shared<DataTypeDateTime64>(precision, timezone);
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}
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
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{
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/// Optional precision argument
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Int64 precision = DEFAULT_PRECISION;
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if (arguments.size() >= argument_names.size() + 2)
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precision = extractPrecision(arguments[argument_names.size() + 1]);
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/// Optional timezone argument
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std::string timezone;
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if (arguments.size() == argument_names.size() + 3)
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timezone = extractTimezone(arguments.back());
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Columns converted_arguments;
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convertRequiredArguments(arguments, converted_arguments);
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/// Optional fraction argument
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const ColumnVector<Float64>::Container * fraction_data = nullptr;
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if (arguments.size() >= argument_names.size() + 1)
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{
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ColumnPtr fraction_column = castColumn(arguments[argument_names.size()], std::make_shared<DataTypeFloat64>());
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fraction_column = fraction_column->convertToFullColumnIfConst();
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converted_arguments.push_back(fraction_column);
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fraction_data = &typeid_cast<const ColumnFloat64 &>(*converted_arguments[6]).getData();
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}
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auto res_column = ColumnDateTime64::create(input_rows_count, static_cast<UInt32>(precision));
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auto & result_data = res_column->getData();
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const auto & year_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[0]).getData();
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const auto & month_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[1]).getData();
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const auto & day_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[2]).getData();
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const auto & hour_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[3]).getData();
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const auto & minute_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[4]).getData();
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const auto & second_data = typeid_cast<const ColumnFloat32 &>(*converted_arguments[5]).getData();
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const auto & date_lut = DateLUT::instance(timezone);
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const auto max_fraction = pow(10, precision) - 1;
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const auto min_date_time = minDateTime(date_lut);
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const auto max_date_time = maxDateTime(date_lut);
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for (size_t i = 0; i < input_rows_count; ++i)
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{
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const auto year = year_data[i];
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const auto month = month_data[i];
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const auto day = day_data[i];
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const auto hour = hour_data[i];
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const auto minute = minute_data[i];
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const auto second = second_data[i];
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auto date_time = dateTime(year, month, day, hour, minute, second, date_lut);
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double fraction = 0;
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if (unlikely(date_time == min_date_time))
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fraction = 0;
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else if (unlikely(date_time == max_date_time))
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fraction = 999999999;
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else
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{
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fraction = fraction_data ? (*fraction_data)[i] : 0;
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if (unlikely(std::isnan(fraction)))
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{
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date_time = min_date_time;
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fraction = 0;
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}
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else if (unlikely(fraction < 0))
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fraction = 0;
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else if (unlikely(fraction > max_fraction))
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fraction = max_fraction;
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}
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result_data[i] = DecimalUtils::decimalFromComponents<DateTime64>(
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date_time,
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static_cast<Int64>(fraction),
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static_cast<UInt32>(precision));
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}
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return res_column;
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}
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private:
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UInt8 extractPrecision(const ColumnWithTypeAndName & precision_argument) const
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{
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Int64 precision = DEFAULT_PRECISION;
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if (!isNumber(precision_argument.type) || !precision_argument.column || (precision_argument.column->size() != 1 && !typeid_cast<const ColumnConst*>(precision_argument.column.get())))
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Argument 'precision' for function {} must be constant number", getName());
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precision = precision_argument.column->getInt(0);
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if (precision < 0 || precision > 9)
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throw Exception(ErrorCodes::ARGUMENT_OUT_OF_BOUND,
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"Argument 'precision' for function {} must be in range [0, 9]", getName());
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return precision;
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}
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};
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}
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REGISTER_FUNCTION(MakeDate)
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{
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factory.registerFunction<FunctionMakeDate<MakeDateTraits>>();
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factory.registerFunction<FunctionMakeDate<MakeDate32Traits>>();
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factory.registerFunction<FunctionMakeDateTime>();
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factory.registerFunction<FunctionMakeDateTime64>();
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}
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}
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