mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-11 17:02:25 +00:00
127 lines
3.4 KiB
C++
127 lines
3.4 KiB
C++
#include "config_functions.h"
|
|
|
|
#if USE_S2_GEOMETRY
|
|
|
|
#include <Columns/ColumnArray.h>
|
|
#include <Columns/ColumnsNumber.h>
|
|
#include <DataTypes/DataTypesNumber.h>
|
|
#include <DataTypes/DataTypeArray.h>
|
|
#include <Functions/FunctionFactory.h>
|
|
#include <Common/typeid_cast.h>
|
|
#include <base/range.h>
|
|
|
|
#include "s2_fwd.h"
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
|
|
extern const int BAD_ARGUMENTS;
|
|
extern const int ILLEGAL_COLUMN;
|
|
}
|
|
|
|
namespace
|
|
{
|
|
|
|
/**
|
|
* Each cell in s2 library is a quadrilateral bounded by four geodesics.
|
|
* So, each cell has 4 neighbors
|
|
*/
|
|
class FunctionS2GetNeighbors : public IFunction
|
|
{
|
|
public:
|
|
static constexpr auto name = "s2GetNeighbors";
|
|
|
|
static FunctionPtr create(ContextPtr)
|
|
{
|
|
return std::make_shared<FunctionS2GetNeighbors>();
|
|
}
|
|
|
|
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).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<DataTypeArray>(std::make_shared<DataTypeUInt64>());
|
|
}
|
|
|
|
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 dst = ColumnArray::create(ColumnUInt64::create());
|
|
auto & dst_data = dst->getData();
|
|
auto & dst_offsets = dst->getOffsets();
|
|
dst_offsets.resize(input_rows_count);
|
|
size_t current_offset = 0;
|
|
|
|
for (size_t row = 0; row < input_rows_count; ++row)
|
|
{
|
|
const UInt64 id = data_id[row];
|
|
|
|
S2CellId cell_id(id);
|
|
|
|
if (!cell_id.is_valid())
|
|
throw Exception(ErrorCodes::BAD_ARGUMENTS, "Cell is not valid");
|
|
|
|
S2CellId neighbors[4];
|
|
cell_id.GetEdgeNeighbors(neighbors);
|
|
|
|
dst_data.reserve(dst_data.size() + 4);
|
|
for (auto & neighbor : neighbors)
|
|
{
|
|
++current_offset;
|
|
dst_data.insert(neighbor.id());
|
|
}
|
|
dst_offsets[row] = current_offset;
|
|
}
|
|
|
|
return dst;
|
|
}
|
|
|
|
};
|
|
|
|
}
|
|
|
|
void registerFunctionS2GetNeighbors(FunctionFactory & factory)
|
|
{
|
|
factory.registerFunction<FunctionS2GetNeighbors>();
|
|
}
|
|
|
|
|
|
}
|
|
|
|
#endif
|