uqa-sql 0.2.1

PostgreSQL-compatible SQL compiler built on libpg_query
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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162

//
// Unified Query Algebra
//
// Copyright (c) 2023-2026 Cognica, Inc.
//

//! Row-trigger and rewrite-rule catalog statements.

use serde::{Deserialize, Serialize};

use super::{Expr, Statement};

#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
pub enum TriggerTiming {
    Before,
    After,
    InsteadOf,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
pub enum TriggerEvent {
    Insert,
    Update,
    Delete,
    Truncate,
}

#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct TriggerTransitionRelation {
    pub name: String,
    pub is_new: bool,
    pub is_table: bool,
}

#[derive(Debug, Clone, Copy, Default, PartialEq, Eq, Serialize, Deserialize)]
#[serde(rename_all = "snake_case")]
pub enum TriggerDeferrability {
    #[default]
    NotDeferrable,
    InitiallyImmediate,
    InitiallyDeferred,
}

impl TriggerDeferrability {
    pub const fn is_deferrable(self) -> bool {
        !matches!(self, Self::NotDeferrable)
    }

    pub const fn is_initially_deferred(self) -> bool {
        matches!(self, Self::InitiallyDeferred)
    }
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct CreateTrigger {
    pub name: String,
    pub table: String,
    pub function: String,
    pub arguments: Vec<String>,
    #[serde(default)]
    pub constraint: bool,
    #[serde(default)]
    pub referenced_table: Option<String>,
    #[serde(default)]
    pub deferrability: TriggerDeferrability,
    pub row: bool,
    pub timing: TriggerTiming,
    pub events: Vec<TriggerEvent>,
    pub update_columns: Vec<String>,
    #[serde(default)]
    pub transition_relations: Vec<TriggerTransitionRelation>,
    pub when: Option<Expr>,
    pub or_replace: bool,
}

impl CreateTrigger {
    #[must_use]
    pub fn old_transition_table(&self) -> Option<&str> {
        self.transition_relations
            .iter()
            .find(|relation| relation.is_table && !relation.is_new)
            .map(|relation| relation.name.as_str())
    }

    #[must_use]
    pub fn new_transition_table(&self) -> Option<&str> {
        self.transition_relations
            .iter()
            .find(|relation| relation.is_table && relation.is_new)
            .map(|relation| relation.name.as_str())
    }
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct DropTrigger {
    pub name: String,
    pub table: String,
    pub if_exists: bool,
    pub cascade: bool,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
pub enum RuleEvent {
    Select,
    Insert,
    Update,
    Delete,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct CreateRule {
    pub name: String,
    pub table: String,
    pub event: RuleEvent,
    pub instead: bool,
    pub condition: Option<Expr>,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub condition_sql: Option<String>,
    pub actions: Vec<Statement>,
    #[serde(default)]
    pub action_sql: Vec<String>,
    pub or_replace: bool,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct DropRule {
    pub name: String,
    pub table: String,
    pub if_exists: bool,
    pub cascade: bool,
}

#[derive(Debug, Clone, Copy, Default, PartialEq, Eq, Serialize, Deserialize)]
pub enum EventEnableMode {
    #[default]
    Origin,
    Disabled,
    Replica,
    Always,
}

impl EventEnableMode {
    #[must_use]
    pub const fn catalog_code(self) -> &'static str {
        match self {
            Self::Origin => "O",
            Self::Disabled => "D",
            Self::Replica => "R",
            Self::Always => "A",
        }
    }

    #[must_use]
    pub const fn fires_in_origin(self) -> bool {
        matches!(self, Self::Origin | Self::Always)
    }

    #[must_use]
    pub const fn fires_in_replica(self) -> bool {
        matches!(self, Self::Replica | Self::Always)
    }
}