sqlparser/ast/
trigger.rs

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
163
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

//! SQL Abstract Syntax Tree (AST) for triggers.
use super::*;

/// This specifies whether the trigger function should be fired once for every row affected by the trigger event, or just once per SQL statement.
#[derive(Debug, Clone, Copy, PartialEq, PartialOrd, Eq, Ord, Hash)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "visitor", derive(Visit, VisitMut))]
pub enum TriggerObject {
    Row,
    Statement,
}

impl fmt::Display for TriggerObject {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            TriggerObject::Row => write!(f, "ROW"),
            TriggerObject::Statement => write!(f, "STATEMENT"),
        }
    }
}

/// This clause indicates whether the following relation name is for the before-image transition relation or the after-image transition relation
#[derive(Debug, Clone, Copy, PartialEq, PartialOrd, Eq, Ord, Hash)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "visitor", derive(Visit, VisitMut))]
pub enum TriggerReferencingType {
    OldTable,
    NewTable,
}

impl fmt::Display for TriggerReferencingType {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            TriggerReferencingType::OldTable => write!(f, "OLD TABLE"),
            TriggerReferencingType::NewTable => write!(f, "NEW TABLE"),
        }
    }
}

/// This keyword immediately precedes the declaration of one or two relation names that provide access to the transition relations of the triggering statement
#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "visitor", derive(Visit, VisitMut))]
pub struct TriggerReferencing {
    pub refer_type: TriggerReferencingType,
    pub is_as: bool,
    pub transition_relation_name: ObjectName,
}

impl fmt::Display for TriggerReferencing {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(
            f,
            "{refer_type}{is_as} {relation_name}",
            refer_type = self.refer_type,
            is_as = if self.is_as { " AS" } else { "" },
            relation_name = self.transition_relation_name
        )
    }
}

/// Used to describe trigger events
#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "visitor", derive(Visit, VisitMut))]
pub enum TriggerEvent {
    Insert,
    Update(Vec<Ident>),
    Delete,
    Truncate,
}

impl fmt::Display for TriggerEvent {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            TriggerEvent::Insert => write!(f, "INSERT"),
            TriggerEvent::Update(columns) => {
                write!(f, "UPDATE")?;
                if !columns.is_empty() {
                    write!(f, " OF")?;
                    write!(f, " {}", display_comma_separated(columns))?;
                }
                Ok(())
            }
            TriggerEvent::Delete => write!(f, "DELETE"),
            TriggerEvent::Truncate => write!(f, "TRUNCATE"),
        }
    }
}

/// Trigger period
#[derive(Debug, Clone, Copy, PartialEq, PartialOrd, Eq, Ord, Hash)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "visitor", derive(Visit, VisitMut))]
pub enum TriggerPeriod {
    After,
    Before,
    InsteadOf,
}

impl fmt::Display for TriggerPeriod {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            TriggerPeriod::After => write!(f, "AFTER"),
            TriggerPeriod::Before => write!(f, "BEFORE"),
            TriggerPeriod::InsteadOf => write!(f, "INSTEAD OF"),
        }
    }
}

/// Types of trigger body execution body.
#[derive(Debug, Clone, Copy, PartialEq, PartialOrd, Eq, Ord, Hash)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "visitor", derive(Visit, VisitMut))]
pub enum TriggerExecBodyType {
    Function,
    Procedure,
}

impl fmt::Display for TriggerExecBodyType {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            TriggerExecBodyType::Function => write!(f, "FUNCTION"),
            TriggerExecBodyType::Procedure => write!(f, "PROCEDURE"),
        }
    }
}
/// This keyword immediately precedes the declaration of one or two relation names that provide access to the transition relations of the triggering statement
#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "visitor", derive(Visit, VisitMut))]
pub struct TriggerExecBody {
    pub exec_type: TriggerExecBodyType,
    pub func_desc: FunctionDesc,
}

impl fmt::Display for TriggerExecBody {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(
            f,
            "{exec_type} {func_desc}",
            exec_type = self.exec_type,
            func_desc = self.func_desc
        )
    }
}