mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-04 21:42:39 +00:00
85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
#include "config_functions.h"
|
|
|
|
#if USE_H3
|
|
# include <Columns/ColumnsNumber.h>
|
|
# include <DataTypes/DataTypesNumber.h>
|
|
# include <Functions/FunctionFactory.h>
|
|
# include <Functions/IFunction.h>
|
|
# include <IO/WriteHelpers.h>
|
|
# include <Common/typeid_cast.h>
|
|
# include <ext/range.h>
|
|
|
|
# if __has_include(<h3/h3api.h>)
|
|
# include <h3/h3api.h>
|
|
# include <h3/constants.h>
|
|
# else
|
|
# include <h3api.h>
|
|
# include <constants.h>
|
|
# endif
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
|
|
extern const int ARGUMENT_OUT_OF_BOUND;
|
|
}
|
|
|
|
class FunctionH3HexAreaM2 : public IFunction
|
|
{
|
|
public:
|
|
static constexpr auto name = "h3HexAreaM2";
|
|
|
|
static FunctionPtr create(const Context &) { return std::make_shared<FunctionH3HexAreaM2>(); }
|
|
|
|
std::string getName() const override { return name; }
|
|
|
|
size_t getNumberOfArguments() const override { return 1; }
|
|
bool useDefaultImplementationForConstants() const override { return true; }
|
|
|
|
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
|
|
{
|
|
auto arg = arguments[0].get();
|
|
if (!WhichDataType(arg).isUInt8())
|
|
throw Exception(
|
|
"Illegal type " + arg->getName() + " of argument " + std::to_string(1) + " of function " + getName() + ". Must be UInt8",
|
|
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
|
|
|
return std::make_shared<DataTypeFloat64>();
|
|
}
|
|
|
|
void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result, size_t input_rows_count) override
|
|
{
|
|
const auto col_hindex = block.getByPosition(arguments[0]).column.get();
|
|
|
|
auto dst = ColumnVector<Float64>::create();
|
|
auto & dst_data = dst->getData();
|
|
dst_data.resize(input_rows_count);
|
|
|
|
for (const auto row : ext::range(0, input_rows_count))
|
|
{
|
|
const UInt64 resolution = col_hindex->getUInt(row);
|
|
if (resolution > MAX_H3_RES)
|
|
throw Exception("The argument 'resolution' (" + toString(resolution) + ") of function " + getName()
|
|
+ " is out of bounds because the maximum resolution in H3 library is " + toString(MAX_H3_RES), ErrorCodes::ARGUMENT_OUT_OF_BOUND);
|
|
|
|
Float64 res = hexAreaM2(resolution);
|
|
|
|
dst_data[row] = res;
|
|
}
|
|
|
|
block.getByPosition(result).column = std::move(dst);
|
|
}
|
|
};
|
|
|
|
|
|
void registerFunctionH3HexAreaM2(FunctionFactory & factory)
|
|
{
|
|
factory.registerFunction<FunctionH3HexAreaM2>();
|
|
}
|
|
|
|
}
|
|
#endif
|