a3s_orm/compiler/
dialect.rs

1pub trait Dialect: Send + Sync {
2    fn name(&self) -> &'static str;
3    fn identifier_quote(&self) -> char;
4    fn placeholder(&self, index: usize) -> String;
5    fn supports_returning(&self) -> bool;
6    fn supports_on_conflict(&self) -> bool;
7    /// Whether the dialect accepts `UPDATE ... FROM ...`.
8    fn supports_update_from(&self) -> bool {
9        false
10    }
11    /// Whether the dialect accepts the typed SELECT row-locking clause.
12    fn supports_select_row_locking(&self) -> bool {
13        false
14    }
15    /// Whether the dialect accepts PostgreSQL-style typed table locks.
16    fn supports_table_locking(&self) -> bool {
17        false
18    }
19}
20
21#[derive(Clone, Copy, Debug, Default)]
22pub struct PostgresDialect;
23
24impl Dialect for PostgresDialect {
25    fn name(&self) -> &'static str {
26        "PostgreSQL"
27    }
28
29    fn identifier_quote(&self) -> char {
30        '"'
31    }
32
33    fn placeholder(&self, index: usize) -> String {
34        format!("${index}")
35    }
36
37    fn supports_returning(&self) -> bool {
38        true
39    }
40
41    fn supports_on_conflict(&self) -> bool {
42        true
43    }
44
45    fn supports_update_from(&self) -> bool {
46        true
47    }
48
49    fn supports_select_row_locking(&self) -> bool {
50        true
51    }
52
53    fn supports_table_locking(&self) -> bool {
54        true
55    }
56}
57
58#[derive(Clone, Copy, Debug, Default)]
59pub struct SqliteDialect;
60
61impl Dialect for SqliteDialect {
62    fn name(&self) -> &'static str {
63        "SQLite"
64    }
65
66    fn identifier_quote(&self) -> char {
67        '"'
68    }
69
70    fn placeholder(&self, _index: usize) -> String {
71        "?".to_string()
72    }
73
74    fn supports_returning(&self) -> bool {
75        true
76    }
77
78    fn supports_on_conflict(&self) -> bool {
79        true
80    }
81
82    fn supports_update_from(&self) -> bool {
83        true
84    }
85}
86
87#[derive(Clone, Copy, Debug, Default)]
88pub struct MysqlDialect;
89
90impl Dialect for MysqlDialect {
91    fn name(&self) -> &'static str {
92        "MySQL"
93    }
94
95    fn identifier_quote(&self) -> char {
96        '`'
97    }
98
99    fn placeholder(&self, _index: usize) -> String {
100        "?".to_string()
101    }
102
103    fn supports_returning(&self) -> bool {
104        false
105    }
106
107    fn supports_on_conflict(&self) -> bool {
108        false
109    }
110}
a3s_orm/compiler/dialect.rs

a3s_orm/compiler/
dialect.rs
