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add functions for powerBI connection
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FArthur-cmd
parent
104b751e51
commit
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117
src/Functions/UTCTimestamp.cpp
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117
src/Functions/UTCTimestamp.cpp
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#include <DataTypes/DataTypeDateTime.h>
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#include <Functions/IFunction.h>
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#include <Core/DecimalFunctions.h>
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#include <Functions/FunctionFactory.h>
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#include <Core/Field.h>
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#include <time.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 NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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}
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namespace
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{
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/// Get the UTC time. (It is a constant, it is evaluated once for the entire query.)
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class ExecutableFunctionUTCTimestamp : public IExecutableFunction
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{
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public:
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explicit ExecutableFunctionUTCTimestamp(time_t time_) : time_value(time_) {}
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String getName() const override { return "UTCTimestamp"; }
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ColumnPtr executeImpl(const ColumnsWithTypeAndName &, const DataTypePtr &, size_t input_rows_count) const override
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{
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return DataTypeDateTime().createColumnConst(
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input_rows_count,
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static_cast<UInt64>(time_value));
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}
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private:
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time_t time_value;
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};
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class FunctionBaseUTCTimestamp : public IFunctionBase
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{
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public:
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explicit FunctionBaseUTCTimestamp(time_t time_, DataTypes argument_types_, DataTypePtr return_type_)
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: time_value(time_), argument_types(std::move(argument_types_)), return_type(std::move(return_type_)) {}
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String getName() const override { return "UTCTimestamp"; }
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const DataTypes & getArgumentTypes() const override
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{
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return argument_types;
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}
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const DataTypePtr & getResultType() const override
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{
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return return_type;
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}
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ExecutableFunctionPtr prepare(const ColumnsWithTypeAndName &) const override
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{
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return std::make_unique<ExecutableFunctionUTCTimestamp>(time_value);
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}
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bool isDeterministic() const override { return false; }
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bool isDeterministicInScopeOfQuery() const override { return true; }
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
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private:
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time_t time_value;
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DataTypes argument_types;
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DataTypePtr return_type;
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};
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class UTCTimestampOverloadResolver : public IFunctionOverloadResolver
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{
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public:
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static constexpr auto name = "UTCTimestamp";
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String getName() const override { return name; }
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bool isDeterministic() const override { return false; }
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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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static FunctionOverloadResolverPtr create(ContextPtr) { return std::make_unique<UTCTimestampOverloadResolver>(); }
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DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName & arguments) const override
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{
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if (arguments.size() > 0)
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{
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throw Exception("Arguments size of function " + getName() + " should be 0", ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
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}
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return std::make_shared<DataTypeDateTime>();
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}
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FunctionBasePtr buildImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &) const override
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{
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if (arguments.size() > 0)
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{
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throw Exception("Arguments size of function " + getName() + " should be 0", ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
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}
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return std::make_unique<FunctionBaseUTCTimestamp>(time(nullptr), DataTypes(), std::make_shared<DataTypeDateTime>("UTC"));
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}
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};
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}
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/// UTC_timestamp for MySQL interface support
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REGISTER_FUNCTION(UTCTimestamp)
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{
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factory.registerFunction<UTCTimestampOverloadResolver>({}, FunctionFactory::CaseInsensitive);
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factory.registerAlias("UTC_timestamp", UTCTimestampOverloadResolver::name, FunctionFactory::CaseInsensitive);
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}
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}
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228
src/Functions/timeDiff.cpp
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228
src/Functions/timeDiff.cpp
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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/ColumnString.h>
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#include <Columns/ColumnsNumber.h>
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#include <Columns/ColumnDecimal.h>
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#include <Functions/IFunction.h>
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#include <Functions/FunctionHelpers.h>
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#include <Functions/FunctionFactory.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 <base/find_symbols.h>
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#include <type_traits>
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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 ILLEGAL_COLUMN;
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}
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namespace
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{
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/** TimeDiff(t1, t2)
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* t1 and t2 can be Date or DateTime
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*/
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class FunctionTimeDiff : public IFunction
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{
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using ColumnDateTime64 = ColumnDecimal<DateTime64>;
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public:
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static constexpr auto name = "TimeDiff";
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static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionTimeDiff>(); }
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String getName() const override
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{
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return name;
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}
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bool isVariadic() const override { return true; }
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
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size_t getNumberOfArguments() const override { return 0; }
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
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{
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if (arguments.size() != 2)
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throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
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+ toString(arguments.size()) + ", should be 2",
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ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
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if (!isDate(arguments[0]) && !isDateTime(arguments[0]) && !isDateTime64(arguments[1]))
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throw Exception("First argument for function " + getName() + " must be Date or DateTime",
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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if (!isDate(arguments[1]) && !isDateTime(arguments[1]) && !isDateTime64(arguments[2]))
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throw Exception("Second argument for function " + getName() + " must be Date or DateTime",
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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return std::make_shared<DataTypeInt64>();
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}
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bool useDefaultImplementationForConstants() const override { return true; }
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ColumnNumbers getArgumentsThatAreAlwaysConstant() const override { return {}; }
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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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const IColumn & x = *arguments[0].column;
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const IColumn & y = *arguments[1].column;
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size_t rows = input_rows_count;
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auto res = ColumnInt64::create(rows);
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dispatchForColumns<ToRelativeSecondNumImpl>(x, y, DateLUT::instance(), DateLUT::instance(), res->getData());
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return res;
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}
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private:
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template <typename Transform>
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void dispatchForColumns(
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const IColumn & x, const IColumn & y,
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const DateLUTImpl & timezone_x, const DateLUTImpl & timezone_y,
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ColumnInt64::Container & result) const
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{
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if (const auto * x_vec_16 = checkAndGetColumn<ColumnUInt16>(&x))
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dispatchForSecondColumn<Transform>(*x_vec_16, y, timezone_x, timezone_y, result);
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else if (const auto * x_vec_32 = checkAndGetColumn<ColumnUInt32>(&x))
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dispatchForSecondColumn<Transform>(*x_vec_32, y, timezone_x, timezone_y, result);
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else if (const auto * x_vec_64 = checkAndGetColumn<ColumnDateTime64>(&x))
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dispatchForSecondColumn<Transform>(*x_vec_64, y, timezone_x, timezone_y, result);
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else if (const auto * x_const_16 = checkAndGetColumnConst<ColumnUInt16>(&x))
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dispatchConstForSecondColumn<Transform>(x_const_16->getValue<UInt16>(), y, timezone_x, timezone_y, result);
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else if (const auto * x_const_32 = checkAndGetColumnConst<ColumnUInt32>(&x))
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dispatchConstForSecondColumn<Transform>(x_const_32->getValue<UInt32>(), y, timezone_x, timezone_y, result);
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else if (const auto * x_const_64 = checkAndGetColumnConst<ColumnDateTime64>(&x))
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dispatchConstForSecondColumn<Transform>(x_const_64->getValue<DecimalField<DateTime64>>(), y, timezone_x, timezone_y, result);
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else
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throw Exception("Illegal column for first argument of function " + getName() + ", must be Date, DateTime or DateTime64", ErrorCodes::ILLEGAL_COLUMN);
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}
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template <typename Transform, typename LeftColumnType>
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void dispatchForSecondColumn(
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const LeftColumnType & x, const IColumn & y,
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const DateLUTImpl & timezone_x, const DateLUTImpl & timezone_y,
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ColumnInt64::Container & result) const
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{
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if (const auto * y_vec_16 = checkAndGetColumn<ColumnUInt16>(&y))
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vectorVector<Transform>(x, *y_vec_16, timezone_x, timezone_y, result);
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else if (const auto * y_vec_32 = checkAndGetColumn<ColumnUInt32>(&y))
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vectorVector<Transform>(x, *y_vec_32, timezone_x, timezone_y, result);
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else if (const auto * y_vec_64 = checkAndGetColumn<ColumnDateTime64>(&y))
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vectorVector<Transform>(x, *y_vec_64, timezone_x, timezone_y, result);
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else if (const auto * y_const_16 = checkAndGetColumnConst<ColumnUInt16>(&y))
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vectorConstant<Transform>(x, y_const_16->getValue<UInt16>(), timezone_x, timezone_y, result);
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else if (const auto * y_const_32 = checkAndGetColumnConst<ColumnUInt32>(&y))
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vectorConstant<Transform>(x, y_const_32->getValue<UInt32>(), timezone_x, timezone_y, result);
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else if (const auto * y_const_64 = checkAndGetColumnConst<ColumnDateTime64>(&y))
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vectorConstant<Transform>(x, y_const_64->getValue<DecimalField<DateTime64>>(), timezone_x, timezone_y, result);
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else
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throw Exception("Illegal column for second argument of function " + getName() + ", must be Date or DateTime", ErrorCodes::ILLEGAL_COLUMN);
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}
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template <typename Transform, typename T1>
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void dispatchConstForSecondColumn(
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T1 x, const IColumn & y,
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const DateLUTImpl & timezone_x, const DateLUTImpl & timezone_y,
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ColumnInt64::Container & result) const
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{
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if (const auto * y_vec_16 = checkAndGetColumn<ColumnUInt16>(&y))
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constantVector<Transform>(x, *y_vec_16, timezone_x, timezone_y, result);
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else if (const auto * y_vec_32 = checkAndGetColumn<ColumnUInt32>(&y))
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constantVector<Transform>(x, *y_vec_32, timezone_x, timezone_y, result);
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else if (const auto * y_vec_64 = checkAndGetColumn<ColumnDateTime64>(&y))
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constantVector<Transform>(x, *y_vec_64, timezone_x, timezone_y, result);
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else
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throw Exception("Illegal column for second argument of function " + getName() + ", must be Date or DateTime", ErrorCodes::ILLEGAL_COLUMN);
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}
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template <typename Transform, typename LeftColumnType, typename RightColumnType>
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void vectorVector(
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const LeftColumnType & x, const RightColumnType & y,
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const DateLUTImpl & timezone_x, const DateLUTImpl & timezone_y,
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ColumnInt64::Container & result) const
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{
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const auto & x_data = x.getData();
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const auto & y_data = y.getData();
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const auto transform_x = TransformDateTime64<Transform>(getScale(x));
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const auto transform_y = TransformDateTime64<Transform>(getScale(y));
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for (size_t i = 0, size = x.size(); i < size; ++i)
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result[i] = calculate(transform_x, transform_y, x_data[i], y_data[i], timezone_x, timezone_y);
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}
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template <typename Transform, typename LeftColumnType, typename T2>
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void vectorConstant(
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const LeftColumnType & x, T2 y,
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const DateLUTImpl & timezone_x, const DateLUTImpl & timezone_y,
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ColumnInt64::Container & result) const
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{
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const auto & x_data = x.getData();
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const auto transform_x = TransformDateTime64<Transform>(getScale(x));
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const auto transform_y = TransformDateTime64<Transform>(getScale(y));
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const auto y_value = stripDecimalFieldValue(y);
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for (size_t i = 0, size = x.size(); i < size; ++i)
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result[i] = calculate(transform_x, transform_y, x_data[i], y_value, timezone_x, timezone_y);
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}
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template <typename Transform, typename T1, typename RightColumnType>
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void constantVector(
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T1 x, const RightColumnType & y,
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const DateLUTImpl & timezone_x, const DateLUTImpl & timezone_y,
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ColumnInt64::Container & result) const
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{
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const auto & y_data = y.getData();
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const auto transform_x = TransformDateTime64<Transform>(getScale(x));
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const auto transform_y = TransformDateTime64<Transform>(getScale(y));
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const auto x_value = stripDecimalFieldValue(x);
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for (size_t i = 0, size = y.size(); i < size; ++i)
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result[i] = calculate(transform_x, transform_y, x_value, y_data[i], timezone_x, timezone_y);
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}
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template <typename TransformX, typename TransformY, typename T1, typename T2>
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Int64 calculate(const TransformX & transform_x, const TransformY & transform_y, T1 x, T2 y, const DateLUTImpl & timezone_x, const DateLUTImpl & timezone_y) const
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{
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return static_cast<Int64>(transform_y.execute(y, timezone_y))
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- static_cast<Int64>(transform_x.execute(x, timezone_x));
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}
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template <typename T>
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static UInt32 getScale(const T & v)
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{
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if constexpr (std::is_same_v<T, ColumnDateTime64>)
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return v.getScale();
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else if constexpr (std::is_same_v<T, DecimalField<DateTime64>>)
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return v.getScale();
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return 0;
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}
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template <typename T>
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static auto stripDecimalFieldValue(T && v)
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{
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if constexpr (std::is_same_v<std::decay_t<T>, DecimalField<DateTime64>>)
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return v.getValue();
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else
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return v;
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}
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};
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}
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REGISTER_FUNCTION(TimeDiff)
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{
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factory.registerFunction<FunctionTimeDiff>({}, FunctionFactory::CaseInsensitive);
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}
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}
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