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
|
#include <Functions/array/arrayConcat.h>
#include <Functions/FunctionFactory.h>
#include <Functions/GatherUtils/GatherUtils.h>
#include <DataTypes/DataTypeArray.h>
#include <DataTypes/getLeastSupertype.h>
#include <Interpreters/castColumn.h>
#include <Columns/ColumnArray.h>
#include <Columns/ColumnConst.h>
#include <base/range.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;
}
DataTypePtr FunctionArrayConcat::getReturnTypeImpl(const DataTypes & arguments) const
{
if (arguments.empty())
throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH, "Function {} requires at least one argument.", getName());
for (auto i : collections::range(0, arguments.size()))
{
const auto * array_type = typeid_cast<const DataTypeArray *>(arguments[i].get());
if (!array_type)
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
"Argument {} for function {} must be an array but it has type {}.",
i, getName(), arguments[i]->getName());
}
return getLeastSupertype(arguments);
}
ColumnPtr FunctionArrayConcat::executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & result_type, size_t input_rows_count) const
{
if (result_type->onlyNull())
return result_type->createColumnConstWithDefaultValue(input_rows_count);
size_t rows = input_rows_count;
size_t num_args = arguments.size();
Columns preprocessed_columns(num_args);
for (size_t i = 0; i < num_args; ++i)
{
const ColumnWithTypeAndName & arg = arguments[i];
ColumnPtr preprocessed_column = arg.column;
if (!arg.type->equals(*result_type))
preprocessed_column = castColumn(arg, result_type);
preprocessed_columns[i] = std::move(preprocessed_column);
}
std::vector<std::unique_ptr<GatherUtils::IArraySource>> sources;
for (auto & argument_column : preprocessed_columns)
{
bool is_const = false;
if (const auto * argument_column_const = typeid_cast<const ColumnConst *>(argument_column.get()))
{
is_const = true;
argument_column = argument_column_const->getDataColumnPtr();
}
if (const auto * argument_column_array = typeid_cast<const ColumnArray *>(argument_column.get()))
sources.emplace_back(GatherUtils::createArraySource(*argument_column_array, is_const, rows));
else
throw Exception(ErrorCodes::LOGICAL_ERROR, "Arguments for function {} must be arrays.", getName());
}
auto sink = GatherUtils::concat(sources);
return sink;
}
REGISTER_FUNCTION(ArrayConcat)
{
factory.registerFunction<FunctionArrayConcat>();
}
}
|
