mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-12 02:23:14 +00:00
102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
#include "config_functions.h"
|
|
#if USE_H3
|
|
# include <vector>
|
|
# include <Columns/ColumnArray.h>
|
|
# include <Columns/ColumnsNumber.h>
|
|
# include <DataTypes/DataTypeArray.h>
|
|
# include <DataTypes/DataTypesNumber.h>
|
|
# include <DataTypes/IDataType.h>
|
|
# include <Functions/FunctionFactory.h>
|
|
# include <Functions/IFunction.h>
|
|
# include <Common/typeid_cast.h>
|
|
# include <ext/range.h>
|
|
|
|
# if __has_include(<h3/h3api.h>)
|
|
# include <h3/h3api.h>
|
|
# else
|
|
# include <h3api.h>
|
|
# endif
|
|
|
|
|
|
namespace DB
|
|
{
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
|
|
}
|
|
class FunctionH3KRing : public IFunction
|
|
{
|
|
public:
|
|
static constexpr auto name = "h3kRing";
|
|
|
|
static FunctionPtr create(const Context &) { return std::make_shared<FunctionH3KRing>(); }
|
|
|
|
std::string getName() const override { return name; }
|
|
|
|
size_t getNumberOfArguments() const override { return 2; }
|
|
bool useDefaultImplementationForConstants() const override { return true; }
|
|
|
|
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
|
|
{
|
|
auto arg = arguments[0].get();
|
|
if (!WhichDataType(arg).isUInt64())
|
|
throw Exception(
|
|
"Illegal type " + arg->getName() + " of argument " + std::to_string(1) + " of function " + getName() + ". Must be UInt64",
|
|
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
|
|
|
arg = arguments[1].get();
|
|
if (!isInteger(arg))
|
|
throw Exception(
|
|
"Illegal type " + arg->getName() + " of argument " + std::to_string(2) + " of function " + getName() + ". Must be integer",
|
|
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
|
|
|
return std::make_shared<DataTypeArray>(std::make_shared<DataTypeUInt64>());
|
|
}
|
|
|
|
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();
|
|
const auto col_k = block.getByPosition(arguments[1]).column.get();
|
|
|
|
auto dst = ColumnArray::create(ColumnUInt64::create());
|
|
auto & dst_data = dst->getData();
|
|
auto & dst_offsets = dst->getOffsets();
|
|
dst_offsets.resize(input_rows_count);
|
|
auto current_offset = 0;
|
|
|
|
std::vector<H3Index> hindex_vec;
|
|
|
|
for (const auto row : ext::range(0, input_rows_count))
|
|
{
|
|
const H3Index origin_hindex = col_hindex->getUInt(row);
|
|
const int k = col_k->getInt(row);
|
|
|
|
const auto vec_size = maxKringSize(k);
|
|
hindex_vec.resize(vec_size);
|
|
kRing(origin_hindex, k, hindex_vec.data());
|
|
|
|
dst_data.reserve(dst_data.size() + vec_size);
|
|
for (auto hindex : hindex_vec)
|
|
{
|
|
if (hindex != 0)
|
|
{
|
|
++current_offset;
|
|
dst_data.insert(hindex);
|
|
}
|
|
}
|
|
dst_offsets[row] = current_offset;
|
|
}
|
|
|
|
block.getByPosition(result).column = std::move(dst);
|
|
}
|
|
};
|
|
|
|
|
|
void registerFunctionH3KRing(FunctionFactory & factory)
|
|
{
|
|
factory.registerFunction<FunctionH3KRing>();
|
|
}
|
|
|
|
}
|
|
#endif
|