ClickHouse
94 строки · 2.6 Кб
1#include "config.h"
2
3#if USE_H3
4
5#include <Columns/ColumnsNumber.h>
6#include <DataTypes/DataTypesNumber.h>
7#include <Functions/FunctionFactory.h>
8#include <Functions/IFunction.h>
9#include <IO/WriteHelpers.h>
10#include <Common/typeid_cast.h>
11#include <base/range.h>
12
13#include <constants.h>
14#include <h3api.h>
15
16
17namespace DB
18{
19namespace ErrorCodes
20{
21extern const int ILLEGAL_TYPE_OF_ARGUMENT;
22extern const int ILLEGAL_COLUMN;
23}
24
25namespace
26{
27
28class FunctionH3ExactEdgeLengthRads : public IFunction
29{
30public:
31static constexpr auto name = "h3ExactEdgeLengthRads";
32
33static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionH3ExactEdgeLengthRads>(); }
34
35std::string getName() const override { return name; }
36
37size_t getNumberOfArguments() const override { return 1; }
38bool useDefaultImplementationForConstants() const override { return true; }
39bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
40
41DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
42{
43const auto * arg = arguments[0].get();
44if (!WhichDataType(arg).isUInt64())
45throw Exception(
46ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
47"Illegal type {} of argument {} of function {}. Must be UInt64",
48arg->getName(), 1, getName());
49
50return std::make_shared<DataTypeFloat64>();
51}
52
53ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
54{
55auto non_const_arguments = arguments;
56for (auto & argument : non_const_arguments)
57argument.column = argument.column->convertToFullColumnIfConst();
58
59const auto * column = checkAndGetColumn<ColumnUInt64>(non_const_arguments[0].column.get());
60if (!column)
61throw Exception(
62ErrorCodes::ILLEGAL_COLUMN,
63"Illegal type {} of argument {} of function {}. Must be UInt64",
64arguments[0].type->getName(),
651,
66getName());
67
68const auto & data = column->getData();
69
70auto dst = ColumnVector<Float64>::create();
71auto & dst_data = dst->getData();
72dst_data.resize(input_rows_count);
73
74for (size_t row = 0; row < input_rows_count; ++row)
75{
76const UInt64 index = data[row];
77Float64 res = exactEdgeLengthRads(index);
78dst_data[row] = res;
79}
80
81return dst;
82}
83};
84
85}
86
87REGISTER_FUNCTION(H3ExactEdgeLengthRads)
88{
89factory.registerFunction<FunctionH3ExactEdgeLengthRads>();
90}
91
92}
93
94#endif
95