lbug 0.15.4

An in-process property graph database management system built for query speed and scalability
Documentation 
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

#pragma once

#include "common/vector/value_vector.h"

namespace lbug {
namespace function {

struct Equals {
    template<class A, class B>
    static inline void operation(const A& left, const B& right, uint8_t& result,
        common::ValueVector* /*leftVector*/, common::ValueVector* /*rightVector*/) {
        result = left == right;
    }

    template<class T>
    static bool operation(const T& left, const T& right) {
        uint8_t result = 0;
        operation<T>(left, right, result, nullptr, nullptr);
        return result;
    }
};

struct NotEquals {
    template<class A, class B>
    static inline void operation(const A& left, const B& right, uint8_t& result,
        common::ValueVector* leftVector, common::ValueVector* rightVector) {
        Equals::operation(left, right, result, leftVector, rightVector);
        result = !result;
    }

    template<class T>
    static bool operation(const T& left, const T& right) {
        uint8_t result = 0;
        operation<T>(left, right, result, nullptr, nullptr);
        return result;
    }
};

struct GreaterThan {
    template<class A, class B>
    static inline void operation(const A& left, const B& right, uint8_t& result,
        common::ValueVector* /*leftVector*/, common::ValueVector* /*rightVector*/) {
        result = left > right;
    }

    template<class T>
    static bool operation(const T& left, const T& right) {
        uint8_t result = 0;
        operation<T>(left, right, result, nullptr, nullptr);
        return result;
    }
};

struct GreaterThanEquals {
    template<class A, class B>
    static inline void operation(const A& left, const B& right, uint8_t& result,
        common::ValueVector* leftVector, common::ValueVector* rightVector) {
        uint8_t isGreater = 0;
        uint8_t isEqual = 0;
        GreaterThan::operation(left, right, isGreater, leftVector, rightVector);
        Equals::operation(left, right, isEqual, leftVector, rightVector);
        result = isGreater || isEqual;
    }

    template<class T>
    static bool operation(const T& left, const T& right) {
        uint8_t result = 0;
        operation<T>(left, right, result, nullptr, nullptr);
        return result;
    }
};

struct LessThan {
    template<class A, class B>
    static inline void operation(const A& left, const B& right, uint8_t& result,
        common::ValueVector* leftVector, common::ValueVector* rightVector) {
        GreaterThanEquals::operation(left, right, result, leftVector, rightVector);
        result = !result;
    }

    template<class T>
    static bool operation(const T& left, const T& right) {
        uint8_t result = 0;
        operation<T>(left, right, result, nullptr, nullptr);
        return result;
    }
};

struct LessThanEquals {
    template<class A, class B>
    static inline void operation(const A& left, const B& right, uint8_t& result,
        common::ValueVector* leftVector, common::ValueVector* rightVector) {
        GreaterThan::operation(left, right, result, leftVector, rightVector);
        result = !result;
    }

    template<class T>
    static bool operation(const T& left, const T& right) {
        uint8_t result = 0;
        operation<T>(left, right, result, nullptr, nullptr);
        return result;
    }
};

// specialization for equal and greater than.
template<>
void Equals::operation(const common::list_entry_t& left, const common::list_entry_t& right,
    uint8_t& result, common::ValueVector* leftVector, common::ValueVector* rightVector);
template<>
void Equals::operation(const common::struct_entry_t& left, const common::struct_entry_t& right,
    uint8_t& result, common::ValueVector* leftVector, common::ValueVector* rightVector);
template<>
void GreaterThan::operation(const common::list_entry_t& left, const common::list_entry_t& right,
    uint8_t& result, common::ValueVector* leftVector, common::ValueVector* rightVector);
template<>
void GreaterThan::operation(const common::struct_entry_t& left, const common::struct_entry_t& right,
    uint8_t& result, common::ValueVector* leftVector, common::ValueVector* rightVector);

} // namespace function
} // namespace lbug