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130 lines
3.6 KiB
C++
130 lines
3.6 KiB
C++
#include "config.h"
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#if USE_S2_GEOMETRY
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#include <Columns/ColumnsNumber.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <Functions/FunctionFactory.h>
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#include <Common/typeid_cast.h>
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#include <Common/NaNUtils.h>
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#include <base/range.h>
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#include "s2_fwd.h"
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class S2CellId;
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int ILLEGAL_TYPE_OF_ARGUMENT;
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extern const int ILLEGAL_COLUMN;
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}
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namespace
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{
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/**
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* Accepts points of the form (longitude, latitude)
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* Returns s2 identifier
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*/
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class FunctionGeoToS2 : public IFunction
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{
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public:
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static constexpr auto name = "geoToS2";
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static FunctionPtr create(ContextPtr)
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{
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return std::make_shared<FunctionGeoToS2>();
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}
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std::string getName() const override
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{
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return name;
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}
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size_t getNumberOfArguments() const override { return 2; }
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bool useDefaultImplementationForConstants() const override { return true; }
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
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{
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for (size_t i = 0; i < getNumberOfArguments(); ++i)
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{
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const auto * arg = arguments[i].get();
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if (!WhichDataType(arg).isFloat64())
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throw Exception(
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Illegal type {} of argument {} of function {}. Must be Float64",
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arg->getName(), i, getName());
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}
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return std::make_shared<DataTypeUInt64>();
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}
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
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{
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auto non_const_arguments = arguments;
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for (auto & argument : non_const_arguments)
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argument.column = argument.column->convertToFullColumnIfConst();
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const auto * col_lon = checkAndGetColumn<ColumnFloat64>(non_const_arguments[0].column.get());
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if (!col_lon)
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throw Exception(
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ErrorCodes::ILLEGAL_COLUMN,
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"Illegal type {} of argument {} of function {}. Must be Float64",
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arguments[0].type->getName(),
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1,
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getName());
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const auto & data_col_lon = col_lon->getData();
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const auto * col_lat = checkAndGetColumn<ColumnFloat64>(non_const_arguments[1].column.get());
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if (!col_lat)
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throw Exception(
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ErrorCodes::ILLEGAL_COLUMN,
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"Illegal type {} of argument {} of function {}. Must be Float64",
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arguments[0].type->getName(),
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2,
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getName());
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const auto & data_col_lat = col_lat->getData();
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auto dst = ColumnVector<UInt64>::create();
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auto & dst_data = dst->getData();
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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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const Float64 lon = data_col_lon[row];
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const Float64 lat = data_col_lat[row];
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if (isNaN(lon) || isNaN(lat))
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Arguments must not be NaN");
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if (!(isFinite(lon) && isFinite(lat)))
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Arguments must not be infinite");
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/// S2 acceptes point as (latitude, longitude)
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S2LatLng lat_lng = S2LatLng::FromDegrees(lat, lon);
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S2CellId id(lat_lng);
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dst_data[row] = id.id();
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}
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return dst;
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}
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};
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}
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REGISTER_FUNCTION(GeoToS2)
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{
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factory.registerFunction<FunctionGeoToS2>();
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}
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}
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#endif
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