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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
#include <Functions/IFunction.h>
#include <Functions/FunctionFactory.h>
#include <Functions/FunctionHelpers.h>
#include <Functions/GeoHash.h>
#include <Columns/ColumnArray.h>
#include <Columns/ColumnString.h>
#include <DataTypes/DataTypeArray.h>
#include <DataTypes/DataTypeString.h>
#include <memory>
#include <string>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
extern const int TOO_LARGE_ARRAY_SIZE;
}
namespace
{
class FunctionGeohashesInBox : public IFunction
{
public:
static constexpr auto name = "geohashesInBox";
static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionGeohashesInBox>(); }
String getName() const override { return name; }
size_t getNumberOfArguments() const override { return 5; }
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
{
validateArgumentType(*this, arguments, 0, isFloat, "float");
validateArgumentType(*this, arguments, 1, isFloat, "float");
validateArgumentType(*this, arguments, 2, isFloat, "float");
validateArgumentType(*this, arguments, 3, isFloat, "float");
validateArgumentType(*this, arguments, 4, isUInt8, "integer");
if (!(arguments[0]->equals(*arguments[1]) &&
arguments[0]->equals(*arguments[2]) &&
arguments[0]->equals(*arguments[3])))
{
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
"Illegal type of argument of {} all coordinate arguments must have the same type, "
"instead they are:{}, {}, {}, {}.", getName(), arguments[0]->getName(),
arguments[1]->getName(), arguments[2]->getName(), arguments[3]->getName());
}
return std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>());
}
bool useDefaultImplementationForConstants() const override { return true; }
bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
template <typename LonAndLatType, typename PrecisionType>
void execute(
const IColumn * lon_min_column,
const IColumn * lat_min_column,
const IColumn * lon_max_column,
const IColumn * lat_max_column,
const IColumn * precision_column,
ColumnPtr & result,
size_t input_rows_count) const
{
static constexpr size_t max_array_size = 10'000'000;
const auto * lon_min_const = typeid_cast<const ColumnConst *>(lon_min_column);
const auto * lat_min_const = typeid_cast<const ColumnConst *>(lat_min_column);
const auto * lon_max_const = typeid_cast<const ColumnConst *>(lon_max_column);
const auto * lat_max_const = typeid_cast<const ColumnConst *>(lat_max_column);
const auto * precision_const = typeid_cast<const ColumnConst *>(precision_column);
if (lon_min_const)
lon_min_column = &lon_min_const->getDataColumn();
if (lat_min_const)
lat_min_column = &lat_min_const->getDataColumn();
if (lon_max_const)
lon_max_column = &lon_max_const->getDataColumn();
if (lat_max_const)
lat_max_column = &lat_max_const->getDataColumn();
if (precision_const)
precision_column = &precision_const->getDataColumn();
const auto * lon_min = checkAndGetColumn<ColumnVector<LonAndLatType>>(lon_min_column);
const auto * lat_min = checkAndGetColumn<ColumnVector<LonAndLatType>>(lat_min_column);
const auto * lon_max = checkAndGetColumn<ColumnVector<LonAndLatType>>(lon_max_column);
const auto * lat_max = checkAndGetColumn<ColumnVector<LonAndLatType>>(lat_max_column);
const auto * precision = checkAndGetColumn<ColumnVector<PrecisionType>>(precision_column);
if (!lon_min || !lat_min || !lon_max || !lat_max || !precision)
{
throw Exception(ErrorCodes::LOGICAL_ERROR, "Unsupported argument types for function {} : {}, {}, {}, {}.",
getName(), lon_min_column->getName(),
lat_min_column->getName(), lon_max_column->getName(), lat_max_column->getName());
}
auto col_res = ColumnArray::create(ColumnString::create());
ColumnString & res_strings = typeid_cast<ColumnString &>(col_res->getData());
ColumnArray::Offsets & res_offsets = col_res->getOffsets();
ColumnString::Chars & res_strings_chars = res_strings.getChars();
ColumnString::Offsets & res_strings_offsets = res_strings.getOffsets();
for (size_t row = 0; row < input_rows_count; ++row)
{
const Float64 lon_min_value = lon_min->getElement(lon_min_const ? 0 : row);
const Float64 lat_min_value = lat_min->getElement(lat_min_const ? 0 : row);
const Float64 lon_max_value = lon_max->getElement(lon_max_const ? 0 : row);
const Float64 lat_max_value = lat_max->getElement(lat_max_const ? 0 : row);
const PrecisionType precision_value = precision->getElement(precision_const ? 0 : row);
const auto prepared_args = geohashesInBoxPrepare(
lon_min_value, lat_min_value, lon_max_value, lat_max_value,
precision_value);
if (prepared_args.items_count > max_array_size)
{
throw Exception(ErrorCodes::TOO_LARGE_ARRAY_SIZE, "{} would produce {} array elements, "
"which is bigger than the allowed maximum of {}",
getName(), prepared_args.items_count, max_array_size);
}
res_strings_offsets.reserve(res_strings_offsets.size() + prepared_args.items_count);
res_strings_chars.resize(res_strings_chars.size() + prepared_args.items_count * (prepared_args.precision + 1));
const auto starting_offset = res_strings_offsets.empty() ? 0 : res_strings_offsets.back();
char * out = reinterpret_cast<char *>(res_strings_chars.data() + starting_offset);
// Actually write geohashes into preallocated buffer.
geohashesInBox(prepared_args, out);
for (UInt64 i = 1; i <= prepared_args.items_count ; ++i)
res_strings_offsets.push_back(starting_offset + (prepared_args.precision + 1) * i);
res_offsets.push_back(res_offsets.back() + prepared_args.items_count);
}
if (!res_strings_offsets.empty() && res_strings_offsets.back() != res_strings_chars.size())
{
throw Exception(ErrorCodes::LOGICAL_ERROR, "String column size mismatch (internal logical error)");
}
if (!res_offsets.empty() && res_offsets.back() != res_strings.size())
{
throw Exception(ErrorCodes::LOGICAL_ERROR, "Array column size mismatch (internal logical error){} != {}",
res_offsets.back(), std::to_string(res_strings.size()));
}
result = std::move(col_res);
}
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
{
const IColumn * lon_min = arguments[0].column.get();
const IColumn * lat_min = arguments[1].column.get();
const IColumn * lon_max = arguments[2].column.get();
const IColumn * lat_max = arguments[3].column.get();
const IColumn * precision = arguments[4].column.get();
ColumnPtr res;
if (checkColumn<ColumnVector<Float32>>(lon_min))
execute<Float32, UInt8>(lon_min, lat_min, lon_max, lat_max, precision, res, input_rows_count);
else
execute<Float64, UInt8>(lon_min, lat_min, lon_max, lat_max, precision, res, input_rows_count);
return res;
}
};
}
REGISTER_FUNCTION(GeohashesInBox)
{
factory.registerFunction<FunctionGeohashesInBox>();
}
}
|
