blob: fc9ef75a1e2d7193ef37cd59655bd506ed4f5e9f (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
#include <DataTypes/DataTypeString.h>
#include <Functions/FunctionFactory.h>
#include <Functions/geometryConverters.h>
#include <Columns/ColumnString.h>
#include <string>
#include <memory>
namespace DB
{
class FunctionWkt : public IFunction
{
public:
static inline const char * name = "wkt";
explicit FunctionWkt() = default;
static FunctionPtr create(ContextPtr)
{
return std::make_shared<FunctionWkt>();
}
String getName() const override
{
return name;
}
size_t getNumberOfArguments() const override
{
return 1;
}
DataTypePtr getReturnTypeImpl(const DataTypes &) const override
{
return std::make_shared<DataTypeString>();
}
bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & /*result_type*/, size_t input_rows_count) const override
{
auto res_column = ColumnString::create();
callOnGeometryDataType<CartesianPoint>(arguments[0].type, [&] (const auto & type)
{
using TypeConverter = std::decay_t<decltype(type)>;
using Converter = typename TypeConverter::Type;
auto figures = Converter::convert(arguments[0].column->convertToFullColumnIfConst());
for (size_t i = 0; i < input_rows_count; ++i)
{
std::stringstream str; // STYLE_CHECK_ALLOW_STD_STRING_STREAM
str << boost::geometry::wkt(figures[i]);
std::string serialized = str.str();
res_column->insertData(serialized.c_str(), serialized.size());
}
}
);
return res_column;
}
bool useDefaultImplementationForConstants() const override
{
return true;
}
};
REGISTER_FUNCTION(Wkt)
{
factory.registerFunction<FunctionWkt>();
}
}
|
