uqa-sql 0.4.0

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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187

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

use super::*;
use uqa_core::{memory::MemoryBudget, ArrayValue, CancellationToken};

fn array(elements: Vec<Value>) -> Value {
    Value::Array(ArrayValue::try_new(elements).unwrap())
}

#[test]
fn controlled_quantified_comparison_preserves_nested_null_and_empty_semantics() {
    let budget = MemoryBudget::new(4096);
    let token = CancellationToken::new();
    let control = ProductionControl::new(&budget, &token, &token);
    let nested = array(vec![
        Value::List(vec![Value::Int(1), Value::Null]),
        Value::List(vec![Value::Int(2), Value::Int(3)]),
    ]);
    for (dispatch, needle, values, expected) in [
        (
            FunctionDispatch::AnyOperator,
            Value::Int(2),
            nested.clone(),
            Value::Bool(true),
        ),
        (
            FunctionDispatch::AnyOperator,
            Value::Int(4),
            nested.clone(),
            Value::Null,
        ),
        (
            FunctionDispatch::AllOperator,
            Value::Int(2),
            nested,
            Value::Bool(false),
        ),
        (
            FunctionDispatch::AnyOperator,
            Value::Null,
            array(vec![]),
            Value::Bool(false),
        ),
        (
            FunctionDispatch::AllOperator,
            Value::Null,
            array(vec![]),
            Value::Bool(true),
        ),
        (
            FunctionDispatch::AllOperator,
            Value::Int(1),
            Value::Null,
            Value::Null,
        ),
    ] {
        let output = evaluate(
            dispatch,
            &[needle, values, Value::Str("=".into())],
            &control,
        )
        .unwrap()
        .unwrap();
        assert_eq!(*output, expected);
        assert_eq!(
            budget.used(),
            0,
            "comparison scratch ends before result handoff"
        );
    }
}

#[test]
fn controlled_comparison_keeps_early_decisions_and_first_typed_errors() {
    let budget = MemoryBudget::new(4096);
    let token = CancellationToken::new();
    let control = ProductionControl::new(&budget, &token, &token);
    let values = array(vec![Value::Int(2), Value::Bool(true)]);
    for (dispatch, needle, expected) in [
        (
            FunctionDispatch::AnyOperator,
            Value::Int(1),
            Value::Bool(true),
        ),
        (
            FunctionDispatch::AllOperator,
            Value::Int(3),
            Value::Bool(false),
        ),
    ] {
        assert_eq!(
            *evaluate(
                dispatch,
                &[needle, values.clone(), Value::Str("<".into())],
                &control
            )
            .unwrap()
            .unwrap(),
            expected
        );
    }
    for (dispatch, args, expected) in [
        (
            FunctionDispatch::BetweenSymmetric,
            vec![Value::Int(2), Value::Int(3), Value::Int(1)],
            Value::Bool(true),
        ),
        (
            FunctionDispatch::BetweenSymmetric,
            vec![Value::Int(2), Value::Null, Value::Int(1)],
            Value::Null,
        ),
        (
            FunctionDispatch::IsDistinct,
            vec![Value::Null, Value::Null],
            Value::Bool(false),
        ),
        (
            FunctionDispatch::IsDistinct,
            vec![Value::Null, Value::Int(1)],
            Value::Bool(true),
        ),
    ] {
        assert_eq!(
            *evaluate(dispatch, &args, &control).unwrap().unwrap(),
            expected
        );
    }
    assert!(matches!(
        evaluate(
            FunctionDispatch::BetweenSymmetric,
            &[Value::Int(2), Value::Int(3), Value::Bool(true)],
            &control
        )
        .unwrap(),
        Err(SQLError::TypeMismatch(_))
    ));
    assert_eq!(budget.used(), 0);
}

#[test]
fn quantified_comparison_quota_and_both_cancellation_scopes_release_scratch() {
    let args = [
        Value::Int(1),
        array(vec![Value::Int(2)]),
        Value::Str("=".into()),
    ];
    let token = CancellationToken::new();
    let budget = MemoryBudget::new(4);
    let control = ProductionControl::new(&budget, &token, &token);
    assert_eq!(
        evaluate(FunctionDispatch::AnyOperator, &args, &control)
            .unwrap()
            .unwrap_err()
            .sqlstate(),
        Some("53200")
    );
    assert_eq!(budget.used(), 0);
    for original_cancelled in [true, false] {
        let budget = MemoryBudget::new(4096);
        let original = CancellationToken::new();
        let invoking = CancellationToken::new();
        let control = ProductionControl::new(&budget, &original, &invoking);
        let held = control.copy_text("earlier result").unwrap();
        let used = budget.used();
        if original_cancelled {
            original.cancel();
        } else {
            invoking.cancel();
        }
        assert_eq!(
            evaluate(FunctionDispatch::AllOperator, &args, &control)
                .unwrap()
                .unwrap_err()
                .sqlstate(),
            Some("57014")
        );
        assert_eq!(budget.used(), used);
        assert_eq!(&*held, "earlier result");
        drop(held);
        assert_eq!(budget.used(), 0);
    }
}