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
|
#pragma once
#include <Common/memcmpSmall.h>
#include <Columns/ColumnString.h>
#include <Columns/ColumnsNumber.h>
#include <Functions/FunctionFactory.h>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
}
template <bool negative = false>
struct EmptyImpl
{
/// If the function will return constant value for FixedString data type.
static constexpr auto is_fixed_to_constant = false;
static void vector(const ColumnString::Chars & /*data*/, const ColumnString::Offsets & offsets, PaddedPODArray<UInt8> & res)
{
size_t size = offsets.size();
ColumnString::Offset prev_offset = 1;
for (size_t i = 0; i < size; ++i)
{
res[i] = negative ^ (offsets[i] == prev_offset);
prev_offset = offsets[i] + 1;
}
}
/// Only make sense if is_fixed_to_constant.
static void vectorFixedToConstant(const ColumnString::Chars & /*data*/, size_t /*n*/, UInt8 & /*res*/)
{
throw Exception(ErrorCodes::LOGICAL_ERROR, "Logical error: 'vectorFixedToConstant method' is called");
}
static void vectorFixedToVector(const ColumnString::Chars & data, size_t n, PaddedPODArray<UInt8> & res)
{
size_t size = data.size() / n;
for (size_t i = 0; i < size; ++i)
res[i] = negative ^ memoryIsZeroSmallAllowOverflow15(data.data() + i * n, n);
}
static void array(const ColumnString::Offsets & offsets, PaddedPODArray<UInt8> & res)
{
size_t size = offsets.size();
ColumnString::Offset prev_offset = 0;
for (size_t i = 0; i < size; ++i)
{
res[i] = negative ^ (offsets[i] == prev_offset);
prev_offset = offsets[i];
}
}
static void uuid(const ColumnUUID::Container & container, size_t n, PaddedPODArray<UInt8> & res)
{
for (size_t i = 0; i < n; ++i)
res[i] = negative ^ (container[i].toUnderType() == 0);
}
static void ipv6(const ColumnIPv6::Container & container, size_t n, PaddedPODArray<UInt8> & res)
{
for (size_t i = 0; i < n; ++i)
res[i] = negative ^ (container[i].toUnderType() == 0);
}
static void ipv4(const ColumnIPv4::Container & container, size_t n, PaddedPODArray<UInt8> & res)
{
for (size_t i = 0; i < n; ++i)
res[i] = negative ^ (container[i].toUnderType() == 0);
}
};
}
|
