safe-migrate 0.4.2

Lint PostgreSQL migrations against live database statistics to prevent blocking locks
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

// FILE: src/analysis/transaction.rs

use crate::analysis::graph::DependencyEdge;
use crate::ast::identifiers::ObjectId;
use crate::model::relation::RelationOverlay;
use crate::model::sequence::SequenceOverlay;
use crate::model::types::TypeOverlay;
use std::collections::HashSet;

#[derive(Debug, Clone)]
pub enum StateChange {
    RelationSnapshot {
        id: ObjectId,
        previous: Box<Option<RelationOverlay>>,
    },
    TypeSnapshot {
        id: ObjectId,
        previous: Option<TypeOverlay>,
    },
    SequenceSnapshot {
        id: ObjectId,
        previous: Option<SequenceOverlay>,
    },
    SearchPathSnapshot {
        previous: Vec<String>,
    },
    GenerationCounterSnapshot {
        previous: u64,
    },
    PendingValidationSnapshot {
        previous: HashSet<(ObjectId, String)>,
    },
    GraphLengthMarker {
        len: usize,
    },
    GraphSnapshot {
        previous: Vec<DependencyEdge>,
    },
    FunctionSnapshot {
        id: ObjectId,
        previous: Option<crate::model::function::FunctionOverlay>,
    },
    PublicationSnapshot {
        id: ObjectId,
        previous: Option<crate::model::replication::PublicationOverlay>,
    },
    SubscriptionSnapshot {
        id: ObjectId,
        previous: Option<crate::model::replication::SubscriptionOverlay>,
    },
    RoleSnapshot {
        id: ObjectId,
        previous: Option<crate::model::role::RoleOverlay>,
    },
    TriggerSnapshot {
        id: ObjectId,
        previous: Option<crate::model::trigger::TriggerOverlay>,
    },
    ConstraintSnapshot {
        table_id: ObjectId,
        name: String,
        previous: Option<crate::model::constraint::ConstraintState>,
    },
    CurrentRoleSnapshot {
        previous: String,
    },
    ConfidenceSnapshot {
        previous: crate::analysis::state::Confidence,
    },
}

#[derive(Debug, Clone)]
pub struct TransactionFrame {
    pub name: String,
    pub undo_log: Vec<StateChange>,
}

impl TransactionFrame {
    pub fn new(name: impl Into<String>) -> Self {
        Self {
            name: name.into(),
            undo_log: Vec::new(),
        }
    }
}