ClickHouse/src/Functions/h3IsPentagon.cpp

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#include "config_functions.h"
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#if USE_H3
#include <Columns/ColumnsNumber.h>
#include <DataTypes/DataTypesNumber.h>
#include <Functions/FunctionFactory.h>
#include <Functions/IFunction.h>
#include <Common/typeid_cast.h>
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#include <base/range.h>
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#include <h3api.h>
namespace DB
{
namespace ErrorCodes
{
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
}
namespace
{
class FunctionH3IsPentagon : public IFunction
{
public:
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static constexpr auto name = "h3IsPentagon";
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static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionH3IsPentagon>(); }
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 false; }
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
{
const auto * arg = arguments[0].get();
if (!WhichDataType(arg).isUInt64())
throw Exception(
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
"Illegal type {} of argument {} of function {}. Must be UInt64",
arg->getName(), 1, getName());
return std::make_shared<DataTypeUInt8>();
}
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
{
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const auto * column = checkAndGetColumn<ColumnUInt64>(arguments[0].column.get());
const auto & data = column->getData();
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auto dst = ColumnVector<UInt8>::create();
auto & dst_data = dst->getData();
dst_data.resize(input_rows_count);
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for (size_t row = 0 ; row < input_rows_count ; row++)
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{
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UInt8 res = isPentagon(data[row]);
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dst_data[row] = res;
}
return dst;
}
};
}
void registerFunctionH3IsPentagon(FunctionFactory & factory)
{
factory.registerFunction<FunctionH3IsPentagon>();
}
}
#endif