reinhardt_query/types/
trigger.rs

1//! Trigger-related types for DDL operations
2
3/// Trigger event type
4///
5/// Specifies which DML operation triggers the trigger execution.
6#[derive(Debug, Clone, PartialEq, Eq)]
7pub enum TriggerEvent {
8	/// INSERT operation
9	Insert,
10	/// UPDATE operation (optionally on specific columns)
11	Update {
12		/// Optional list of column names that restrict trigger activation.
13		/// When `None`, the trigger fires on any column update.
14		columns: Option<Vec<String>>,
15	},
16	/// DELETE operation
17	Delete,
18}
19
20/// Trigger timing
21///
22/// Specifies when the trigger executes relative to the triggering event.
23#[derive(Debug, Clone, Copy, PartialEq, Eq)]
24pub enum TriggerTiming {
25	/// Execute before the triggering event
26	Before,
27	/// Execute after the triggering event
28	After,
29	/// Execute instead of the triggering event (SQLite views only)
30	InsteadOf,
31}
32
33/// Trigger scope
34///
35/// Specifies whether the trigger executes for each row or once per statement.
36#[derive(Debug, Clone, Copy, PartialEq, Eq)]
37pub enum TriggerScope {
38	/// Execute for each affected row (FOR EACH ROW)
39	Row,
40	/// Execute once per statement (FOR EACH STATEMENT) - PostgreSQL only
41	Statement,
42}
43
44/// Trigger action timing for MySQL
45///
46/// MySQL-specific feature to control trigger execution order.
47#[derive(Debug, Clone, PartialEq, Eq)]
48pub enum TriggerOrder {
49	/// Execute before another trigger
50	Precedes(String),
51	/// Execute after another trigger
52	Follows(String),
53}
54
55/// Trigger body representation
56///
57/// Contains the SQL statements to execute when the trigger fires.
58#[derive(Debug, Clone, PartialEq)]
59pub enum TriggerBody {
60	/// Single SQL statement
61	Single(String),
62	/// Multiple SQL statements (MySQL/SQLite BEGIN...END block)
63	Multiple(Vec<String>),
64	/// PostgreSQL function call (EXECUTE FUNCTION function_name())
65	PostgresFunction(String),
66}
67
68impl TriggerBody {
69	/// Create a single-statement trigger body
70	pub fn single<S: Into<String>>(statement: S) -> Self {
71		Self::Single(statement.into())
72	}
73
74	/// Create a multi-statement trigger body
75	pub fn multiple<I, S>(statements: I) -> Self
76	where
77		I: IntoIterator<Item = S>,
78		S: Into<String>,
79	{
80		Self::Multiple(statements.into_iter().map(|s| s.into()).collect())
81	}
82
83	/// Create a PostgreSQL function call trigger body
84	pub fn postgres_function<S: Into<String>>(function_name: S) -> Self {
85		Self::PostgresFunction(function_name.into())
86	}
87}
reinhardt_query/types/trigger.rs

reinhardt_query/types/
trigger.rs
