MySQL 8.0.33
Source Code Documentation
sql_value.h
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1/*
2 Copyright (c) 2022, 2023, Oracle and/or its affiliates.
3
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23*/
24
25#ifndef ROUTING_SQL_VALUE_INCLUDED
26#define ROUTING_SQL_VALUE_INCLUDED
27
28#include <optional>
29#include <string>
30
31/**
32 * a nullable SQL value.
33 *
34 * For now, supports NULL and strings.
35 *
36 * Note: In the future, may switch to std::variant<> or
37 * similar to cover more types if needed.
38 */
39class Value {
40 public:
41 using value_type = std::optional<std::string>;
42
43 Value(value_type v) : value_{std::move(v)} {}
44
45 value_type value() const { return value_; }
46
47 /**
48 * "NULL" or the quoted string.
49 */
50 std::string to_string() const;
51
52 private:
54};
55
56inline bool operator==(const Value &a, const Value &b) {
57 return a.value() == b.value();
58}
59
60inline bool operator!=(const Value &a, const Value &b) { return !(a == b); }
61
62#endif
a nullable SQL value.
Definition: sql_value.h:39
std::optional< std::string > value_type
Definition: sql_value.h:41
value_type value() const
Definition: sql_value.h:45
Value(value_type v)
Definition: sql_value.h:43
std::string to_string() const
"NULL" or the quoted string.
Definition: sql_value.cc:92
value_type value_
Definition: sql_value.h:53
Definition: varlen_sort.h:183
bool operator!=(const Value &a, const Value &b)
Definition: sql_value.h:60
bool operator==(const Value &a, const Value &b)
Definition: sql_value.h:56