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#include "clickhouse_config.h"
#if USE_S2_GEOMETRY
#include <Columns/ColumnsNumber.h>
#include <Columns/ColumnTuple.h>
#include <DataTypes/DataTypesNumber.h>
#include <DataTypes/DataTypeTuple.h>
#include <Functions/FunctionFactory.h>
#include <Common/typeid_cast.h>
#include <base/range.h>
#error #include "s2_fwd.h"
class S2CellId;
namespace DB
{
namespace ErrorCodes
{
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
extern const int BAD_ARGUMENTS;
extern const int ILLEGAL_COLUMN;
}
namespace
{
/**
* Returns a point (longitude, latitude) in degrees
*/
class FunctionS2ToGeo : public IFunction
{
public:
static constexpr auto name = "s2ToGeo";
static FunctionPtr create(ContextPtr)
{
return std::make_shared<FunctionS2ToGeo>();
}
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());
DataTypePtr element = std::make_shared<DataTypeFloat64>();
return std::make_shared<DataTypeTuple>(DataTypes{element, element});
}
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
{
auto non_const_arguments = arguments;
for (auto & argument : non_const_arguments)
argument.column = argument.column->convertToFullColumnIfConst();
const auto * col_id = checkAndGetColumn<ColumnUInt64>(non_const_arguments[0].column.get());
if (!col_id)
throw Exception(
ErrorCodes::ILLEGAL_COLUMN,
"Illegal type {} of argument {} of function {}. Must be UInt64",
arguments[0].type->getName(),
1,
getName());
const auto & data_id = col_id->getData();
auto col_longitude = ColumnFloat64::create();
auto col_latitude = ColumnFloat64::create();
auto & longitude = col_longitude->getData();
longitude.reserve(input_rows_count);
auto & latitude = col_latitude->getData();
latitude.reserve(input_rows_count);
for (size_t row = 0; row < input_rows_count; ++row)
{
const auto id = S2CellId(data_id[row]);
if (!id.is_valid())
throw Exception(ErrorCodes::BAD_ARGUMENTS, "CellId is invalid.");
S2Point point = id.ToPoint();
S2LatLng ll(point);
longitude.emplace_back(ll.lng().degrees());
latitude.emplace_back(ll.lat().degrees());
}
return ColumnTuple::create(Columns{std::move(col_longitude), std::move(col_latitude)});
}
};
}
REGISTER_FUNCTION(S2ToGeo)
{
factory.registerFunction<FunctionS2ToGeo>();
}
}
#endif
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