1#include "config_functions.h"
2#if USE_H3
3# include <Columns/ColumnsNumber.h>
4# include <DataTypes/DataTypesNumber.h>
5# include <Functions/FunctionFactory.h>
6# include <Functions/IFunction.h>
7# include <Common/typeid_cast.h>
8# include <ext/range.h>
9
10# include <h3api.h>
11
12
13namespace DB
14{
15class FunctionH3IsValid : public IFunction
16{
17public:
18 static constexpr auto name = "h3IsValid";
19
20 static FunctionPtr create(const Context &) { return std::make_shared<FunctionH3IsValid>(); }
21
22 std::string getName() const override { return name; }
23
24 size_t getNumberOfArguments() const override { return 1; }
25 bool useDefaultImplementationForConstants() const override { return true; }
26
27 DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
28 {
29 auto arg = arguments[0].get();
30 if (!WhichDataType(arg).isUInt64())
31 throw Exception(
32 "Illegal type " + arg->getName() + " of argument " + std::to_string(1) + " of function " + getName() + ". Must be UInt64",
33 ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
34
35 return std::make_shared<DataTypeUInt8>();
36 }
37
38 void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result, size_t input_rows_count) override
39 {
40 const auto col_hindex = block.getByPosition(arguments[0]).column.get();
41
42 auto dst = ColumnVector<UInt8>::create();
43 auto & dst_data = dst->getData();
44 dst_data.resize(input_rows_count);
45
46 for (const auto row : ext::range(0, input_rows_count))
47 {
48 const UInt64 hindex = col_hindex->getUInt(row);
49
50 UInt8 is_valid = h3IsValid(hindex) == 0 ? 0 : 1;
51
52 dst_data[row] = is_valid;
53 }
54
55 block.getByPosition(result).column = std::move(dst);
56 }
57};
58
59
60void registerFunctionH3IsValid(FunctionFactory & factory)
61{
62 factory.registerFunction<FunctionH3IsValid>();
63}
64
65}
66#endif
67