ClickHouse/src/Functions/h3RadsToDegs.cpp
2022-01-11 11:21:56 +03:00

89 lines
2.4 KiB
C++

#include "config_functions.h"
#if USE_H3
#include <Columns/ColumnsNumber.h>
#include <Columns/ColumnArray.h>
#include <DataTypes/DataTypesNumber.h>
#include <Functions/FunctionFactory.h>
#include <Functions/IFunction.h>
#include <Common/typeid_cast.h>
#include <h3api.h>
namespace DB
{
namespace ErrorCodes
{
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
extern const int ILLEGAL_COLUMN;
}
namespace
{
class FunctionH3RadsToDegs final : public IFunction
{
public:
static constexpr auto name = "h3RadsToDegs";
static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionH3RadsToDegs>(); }
std::string getName() const override { return name; }
size_t getNumberOfArguments() const override { return 1; }
bool useDefaultImplementationForConstants() const override { return true; }
bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
{
const auto * arg = arguments[0].get();
if (!WhichDataType(arg).isFloat64())
throw Exception(
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
"Illegal type {} of argument {} of function {}. Must be Float64",
arg->getName(), 1, getName());
return std::make_shared<DataTypeFloat64>();
}
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
{
const auto * column = checkAndGetColumn<ColumnFloat64>(arguments[0].column.get());
if (!column)
throw Exception(
ErrorCodes::ILLEGAL_COLUMN,
"Illegal type {} of argument {} of function {}. Must be Float64",
arguments[0].type->getName(),
1,
getName());
const auto & col_rads = column->getData();
auto dst = ColumnVector<Float64>::create();
auto & dst_data = dst->getData();
dst_data.resize(input_rows_count);
for (size_t row = 0; row < input_rows_count; ++row)
{
const Float64 rads = col_rads[row];
auto res = radsToDegs(rads);
dst_data[row] = res;
}
return dst;
}
};
}
void registerFunctionH3RadsToDegs(FunctionFactory & factory)
{
factory.registerFunction<FunctionH3RadsToDegs>();
}
}
#endif