uqa_sql/catalog/dependencies/
edge.rs

1//
2// Unified Query Algebra
3//
4// Copyright (c) 2023-2026 Cognica, Inc.
5//
6
7//! One `pg_depend` row: a dependent object, the object it references, and how deleting the referenced object treats it.
8
9use super::ObjectAddress;
10
11/// `pg_depend.deptype`.
12#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
13pub enum DependencyKind {
14    /// `n`: dropping the referenced object requires `CASCADE`, which drops the dependent.
15    Normal,
16    /// `a`: the dependent is dropped with the referenced object even without `CASCADE`.
17    Auto,
18    /// `i`: the dependent is part of the referenced object's implementation and can only be dropped with it.
19    Internal,
20    /// `P`: a partition's object depends on its parent's.
21    PartitionPrimary,
22    /// `S`: a partition's object depends on its partition.
23    PartitionSecondary,
24    /// `e`: the dependent is a member of an extension.
25    Extension,
26    /// `x`: the dependent needs an extension and is dropped with it.
27    AutoExtension,
28}
29
30impl DependencyKind {
31    /// The `pg_depend.deptype` letter.
32    #[must_use]
33    pub const fn code(self) -> char {
34        match self {
35            Self::Normal => 'n',
36            Self::Auto => 'a',
37            Self::Internal => 'i',
38            Self::PartitionPrimary => 'P',
39            Self::PartitionSecondary => 'S',
40            Self::Extension => 'e',
41            Self::AutoExtension => 'x',
42        }
43    }
44}
45
46#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
47pub struct Dependency {
48    pub dependent: ObjectAddress,
49    pub referenced: ObjectAddress,
50    pub kind: DependencyKind,
51}
uqa_sql/catalog/dependencies/edge.rs

uqa_sql/catalog/dependencies/
edge.rs
