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
|
#include <Functions/IFunction.h>
#include <Functions/FunctionFactory.h>
#include <Functions/GatherUtils/GatherUtils.h>
#include <DataTypes/DataTypeArray.h>
#include <DataTypes/DataTypeNullable.h>
#include <DataTypes/getLeastSupertype.h>
#include <Columns/ColumnArray.h>
#include <Columns/ColumnConst.h>
#include <Interpreters/castColumn.h>
#include <IO/WriteHelpers.h>
#include <Common/typeid_cast.h>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
}
class FunctionArrayResize : public IFunction
{
public:
static constexpr auto name = "arrayResize";
static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionArrayResize>(); }
String getName() const override { return name; }
bool isVariadic() const override { return true; }
size_t getNumberOfArguments() const override { return 0; }
bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
{
const size_t number_of_arguments = arguments.size();
if (number_of_arguments < 2 || number_of_arguments > 3)
throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH,
"Number of arguments for function {} doesn't match: passed {}, should be 2 or 3",
getName(), number_of_arguments);
if (arguments[0]->onlyNull())
return arguments[0];
const auto * array_type = typeid_cast<const DataTypeArray *>(arguments[0].get());
if (!array_type)
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
"First argument for function {} must be an array but it has type {}.",
getName(), arguments[0]->getName());
if (WhichDataType(array_type->getNestedType()).isNothing())
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Function {} cannot resize {}", getName(), array_type->getName());
if (!isInteger(removeNullable(arguments[1])) && !arguments[1]->onlyNull())
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
"Argument {} for function {} must be integer but it has type {}.",
toString(1), getName(), arguments[1]->getName());
if (number_of_arguments == 2)
return arguments[0];
else /* if (number_of_arguments == 3) */
return std::make_shared<DataTypeArray>(getLeastSupertype(DataTypes{array_type->getNestedType(), arguments[2]}));
}
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & return_type, size_t input_rows_count) const override
{
if (return_type->onlyNull())
return return_type->createColumnConstWithDefaultValue(input_rows_count);
auto result_column = return_type->createColumn();
auto array_column = arguments[0].column;
auto size_column = arguments[1].column;
if (!arguments[0].type->equals(*return_type))
array_column = castColumn(arguments[0], return_type);
const DataTypePtr & return_nested_type = typeid_cast<const DataTypeArray &>(*return_type).getNestedType();
size_t size = array_column->size();
ColumnPtr appended_column;
if (arguments.size() == 3)
{
appended_column = arguments[2].column;
if (!arguments[2].type->equals(*return_nested_type))
appended_column = castColumn(arguments[2], return_nested_type);
}
else
appended_column = return_nested_type->createColumnConstWithDefaultValue(size);
std::unique_ptr<GatherUtils::IArraySource> array_source;
std::unique_ptr<GatherUtils::IValueSource> value_source;
bool is_const = false;
if (const auto * const_array_column = typeid_cast<const ColumnConst *>(array_column.get()))
{
is_const = true;
array_column = const_array_column->getDataColumnPtr();
}
if (const auto * argument_column_array = typeid_cast<const ColumnArray *>(array_column.get()))
array_source = GatherUtils::createArraySource(*argument_column_array, is_const, size);
else
throw Exception(ErrorCodes::LOGICAL_ERROR, "First arguments for function {} must be array.", getName());
bool is_appended_const = false;
if (const auto * const_appended_column = typeid_cast<const ColumnConst *>(appended_column.get()))
{
is_appended_const = true;
appended_column = const_appended_column->getDataColumnPtr();
}
value_source = GatherUtils::createValueSource(*appended_column, is_appended_const, size);
auto sink = GatherUtils::createArraySink(typeid_cast<ColumnArray &>(*result_column), size);
if (isColumnConst(*size_column))
GatherUtils::resizeConstantSize(*array_source, *value_source, *sink, size_column->getInt(0));
else
GatherUtils::resizeDynamicSize(*array_source, *value_source, *sink, *size_column);
return result_column;
}
bool useDefaultImplementationForConstants() const override { return true; }
bool useDefaultImplementationForNulls() const override { return false; }
};
REGISTER_FUNCTION(ArrayResize)
{
factory.registerFunction<FunctionArrayResize>();
}
}
|
