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116 lines
4.7 KiB
C++
116 lines
4.7 KiB
C++
#pragma once
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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 <Functions/IFunction.h>
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#include <DataTypes/DataTypeDateTime64.h>
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#include <Functions/extractTimeZoneFromFunctionArguments.h>
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#include <Functions/DateTimeTransforms.h>
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#include <Functions/TransformDateTime64.h>
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#include <IO/WriteHelpers.h>
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#include <Interpreters/Context.h>
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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 ILLEGAL_TYPE_OF_ARGUMENT;
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extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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}
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template <typename Transform>
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class IFunctionDateOrDateTime : public IFunction
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{
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public:
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static constexpr auto name = Transform::name;
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String getName() const override { return name; }
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bool isVariadic() const override { return true; }
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
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size_t getNumberOfArguments() const override { return 0; }
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bool useDefaultImplementationForConstants() const override { return true; }
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ColumnNumbers getArgumentsThatAreAlwaysConstant() const override { return {1}; }
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bool hasInformationAboutMonotonicity() const override
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{
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return true;
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}
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Monotonicity getMonotonicityForRange(const IDataType & type, const Field & left, const Field & right) const override
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{
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if constexpr (std::is_same_v<typename Transform::FactorTransform, ZeroTransform>)
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return { .is_monotonic = true, .is_always_monotonic = true };
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const IFunction::Monotonicity is_monotonic = { .is_monotonic = true };
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const IFunction::Monotonicity is_not_monotonic;
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const DateLUTImpl * date_lut = &DateLUT::instance();
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if (const auto * timezone = dynamic_cast<const TimezoneMixin *>(&type))
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date_lut = &timezone->getTimeZone();
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if (left.isNull() || right.isNull())
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return is_not_monotonic;
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/// The function is monotonous on the [left, right] segment, if the factor transformation returns the same values for them.
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if (checkAndGetDataType<DataTypeDate>(&type))
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{
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return Transform::FactorTransform::execute(UInt16(left.get<UInt64>()), *date_lut)
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== Transform::FactorTransform::execute(UInt16(right.get<UInt64>()), *date_lut)
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? is_monotonic : is_not_monotonic;
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}
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else if (checkAndGetDataType<DataTypeDate32>(&type))
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{
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return Transform::FactorTransform::execute(Int32(left.get<UInt64>()), *date_lut)
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== Transform::FactorTransform::execute(Int32(right.get<UInt64>()), *date_lut)
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? is_monotonic : is_not_monotonic;
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}
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else
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{
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return Transform::FactorTransform::execute(UInt32(left.get<UInt64>()), *date_lut)
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== Transform::FactorTransform::execute(UInt32(right.get<UInt64>()), *date_lut)
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? is_monotonic : is_not_monotonic;
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}
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}
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protected:
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void checkArguments(const ColumnsWithTypeAndName & arguments, bool is_result_type_date_or_date32) const
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{
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if (arguments.size() == 1)
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{
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if (!isDateOrDate32(arguments[0].type) && !isDateTime(arguments[0].type) && !isDateTime64(arguments[0].type))
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Illegal type {} of argument of function {}. Should be Date, Date32, DateTime or DateTime64",
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arguments[0].type->getName(), getName());
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}
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else if (arguments.size() == 2)
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{
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if (!isDateOrDate32(arguments[0].type) && !isDateTime(arguments[0].type) && !isDateTime64(arguments[0].type))
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Illegal type {} of argument of function {}. Should be Date, Date32, DateTime or DateTime64",
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arguments[0].type->getName(), getName());
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if (!isString(arguments[1].type))
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Function {} supports 1 or 2 arguments. The optional 2nd argument must be "
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"a constant string with a timezone name",
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getName());
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if (isDateOrDate32(arguments[0].type) && is_result_type_date_or_date32)
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"The timezone argument of function {} is allowed only when the 1st argument has the type DateTime or DateTime64",
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getName());
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}
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else
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throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH,
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"Number of arguments for function {} doesn't match: passed {}, should be 1 or 2",
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getName(), arguments.size());
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}
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};
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}
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