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123 lines
3.7 KiB
C++
123 lines
3.7 KiB
C++
#include <Functions/FunctionFactory.h>
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#include <Functions/geometryConverters.h>
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#include <boost/geometry.hpp>
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#include <boost/geometry/geometries/point_xy.hpp>
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#include <boost/geometry/geometries/polygon.hpp>
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#include <base/logger_useful.h>
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#include <Columns/ColumnArray.h>
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#include <Columns/ColumnTuple.h>
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#include <Columns/ColumnConst.h>
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#include <DataTypes/DataTypeArray.h>
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#include <DataTypes/DataTypeTuple.h>
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#include <DataTypes/DataTypeCustomGeo.h>
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#include <memory>
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#include <string>
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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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}
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template <typename Point>
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class FunctionPolygonsUnion : public IFunction
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{
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public:
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static inline const char * name;
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explicit FunctionPolygonsUnion() = default;
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static FunctionPtr create(ContextPtr)
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{
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return std::make_shared<FunctionPolygonsUnion>();
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}
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String getName() const override
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{
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return name;
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}
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bool isVariadic() const override
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{
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return false;
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}
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size_t getNumberOfArguments() const override
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{
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return 2;
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}
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DataTypePtr getReturnTypeImpl(const DataTypes &) const override
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{
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return DataTypeFactory::instance().get("MultiPolygon");
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}
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & /*result_type*/, size_t input_rows_count) const override
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{
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MultiPolygonSerializer<Point> serializer;
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callOnTwoGeometryDataTypes<Point>(arguments[0].type, arguments[1].type, [&](const auto & left_type, const auto & right_type)
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{
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using LeftConverterType = std::decay_t<decltype(left_type)>;
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using RightConverterType = std::decay_t<decltype(right_type)>;
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using LeftConverter = typename LeftConverterType::Type;
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using RightConverter = typename RightConverterType::Type;
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if constexpr (std::is_same_v<ColumnToPointsConverter<Point>, LeftConverter> || std::is_same_v<ColumnToPointsConverter<Point>, RightConverter>)
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throw Exception(fmt::format("Any argument of function {} must not be Point", getName()), ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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else
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{
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auto first = LeftConverter::convert(arguments[0].column->convertToFullColumnIfConst());
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auto second = RightConverter::convert(arguments[1].column->convertToFullColumnIfConst());
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/// We are not interested in some pitfalls in third-party libraries
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/// NOLINTNEXTLINE(clang-analyzer-core.uninitialized.Assign)
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for (size_t i = 0; i < input_rows_count; i++)
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{
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/// Orient the polygons correctly.
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boost::geometry::correct(first[i]);
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boost::geometry::correct(second[i]);
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MultiPolygon<Point> polygons_union{};
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/// Main work here.
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boost::geometry::union_(first[i], second[i], polygons_union);
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serializer.add(polygons_union);
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}
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}
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});
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return serializer.finalize();
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}
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bool useDefaultImplementationForConstants() const override
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{
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return true;
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}
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};
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template <>
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const char * FunctionPolygonsUnion<CartesianPoint>::name = "polygonsUnionCartesian";
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template <>
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const char * FunctionPolygonsUnion<SphericalPoint>::name = "polygonsUnionSpherical";
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void registerFunctionPolygonsUnion(FunctionFactory & factory)
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{
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factory.registerFunction<FunctionPolygonsUnion<CartesianPoint>>();
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factory.registerFunction<FunctionPolygonsUnion<SphericalPoint>>();
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}
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}
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