H3 - Add func H3IsPentagon

src/Functions/h3IsPentagon.cpp

@@ -0,0 +1,82 @@
+#if !defined(ARCADIA_BUILD)
+#    include "config_functions.h"
+#endif
+
+#if USE_H3
+
+#include <Columns/ColumnsNumber.h>
+#include <DataTypes/DataTypesNumber.h>
+#include <Functions/FunctionFactory.h>
+#include <Functions/IFunction.h>
+#include <Common/typeid_cast.h>
+#include <common/range.h>
+
+#include <h3api.h>
+
+
+namespace DB
+{
+namespace ErrorCodes
+{
+extern const int ILLEGAL_TYPE_OF_ARGUMENT;
+}
+
+namespace
+{
+
+class FunctionH3IsPentagon : public IFunction
+{
+public:
+    static constexpr auto name = "h3ResIsPentagon";
+
+    static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionH3IsPentagon>(); }
+
+    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());
+
+        return std::make_shared<DataTypeUInt8>();
+    }
+
+    ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
+    {
+        const auto * col_hindex = arguments[0].column.get();
+
+        auto dst = ColumnVector<UInt8>::create();
+        auto & dst_data = dst->getData();
+        dst_data.resize(input_rows_count);
+
+        for (const auto row : collections::range(0, input_rows_count))
+        {
+            const UInt64 hindex = col_hindex->getUInt(row);
+
+            UInt8 res = isPentagon(hindex);
+
+            dst_data[row] = res;
+        }
+
+        return dst;
+    }
+};
+
+}
+
+void registerFunctionH3IsPentagon(FunctionFactory & factory)
+{
+    factory.registerFunction<FunctionH3IsPentagon>();
+}
+
+}
+
+#endif

src/Functions/registerFunctionsGeo.cpp

@@ -43,6 +43,7 @@ void registerFunctionStringToH3(FunctionFactory &);
 void registerFunctionH3ToString(FunctionFactory &);
 void registerFunctionH3HexAreaM2(FunctionFactory &);
 void registerFunctionH3ResIsClassIII(FunctionFactory &);
+void registerFunctionH3IsPentagon(FunctionFactory &);
 #endif
 
 #if USE_S2_GEOMETRY
@@ -97,6 +98,7 @@ void registerFunctionsGeo(FunctionFactory & factory)
     registerFunctionH3ToString(factory);
     registerFunctionH3HexAreaM2(factory);
     registerFunctionH3ResIsClassIII(factory);
+    registerFunctionH3IsPentagon(factory);
 #endif
 
 #if USE_S2_GEOMETRY

src/Functions/ya.make

@@ -302,6 +302,7 @@ SRCS(
     h3GetResolution.cpp
     h3HexAreaM2.cpp
     h3IndexesAreNeighbors.cpp
+    h3IsPentagon.cpp
     h3IsValid.cpp
     h3ResIsClassIII.cpp
     h3ToChildren.cpp