spg-engine 7.37.21

Execution engine for SPG: glues spg-sql parsing to spg-storage. Foreign keys, joins, vectors, cold tier.
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

//! v7.38 (read01 sweep) — single-numeric-argument math functions coerce an
//! unknown-type string literal argument to numeric (PG's implicit unknown →
//! typed cast). Oracle behaviour from live PG 18.4.

use spg_engine::{Engine, QueryResult};
use spg_storage::Value;

fn one(e: &mut Engine, sql: &str) -> Value<'static> {
    match e.execute(sql).unwrap() {
        QueryResult::Rows { rows, .. } => rows[0].values[0].clone(),
        _ => panic!("expected rows"),
    }
}

#[test]
fn math_functions_coerce_string_argument() {
    let mut e = Engine::new();
    assert_eq!(
        one(&mut e, "SELECT abs('-7')"),
        Value::Numeric {
            scaled: 7,
            scale: 0,
            kind: spg_storage::NumericKind::Finite
        }
    );
    assert_eq!(one(&mut e, "SELECT sqrt('16')"), Value::Float(4.0));
    assert_eq!(one(&mut e, "SELECT cbrt('27')"), Value::Float(3.0));
    assert_eq!(
        one(&mut e, "SELECT sign('-5')"),
        Value::Numeric {
            scaled: -1,
            scale: 0,
            kind: spg_storage::NumericKind::Finite
        }
    );
    assert_eq!(
        one(&mut e, "SELECT ceil('3.2')"),
        Value::Numeric {
            scaled: 4,
            scale: 0,
            kind: spg_storage::NumericKind::Finite
        }
    );
    assert_eq!(
        one(&mut e, "SELECT floor('3.8')"),
        Value::Numeric {
            scaled: 3,
            scale: 0,
            kind: spg_storage::NumericKind::Finite
        }
    );
    assert_eq!(
        one(&mut e, "SELECT round('3.567', 2)"),
        Value::Numeric {
            scaled: 357,
            scale: 2,
            kind: spg_storage::NumericKind::Finite
        }
    );
}

#[test]
fn math_functions_string_edge_cases() {
    let mut e = Engine::new();
    // A non-numeric string still errors.
    assert!(e.execute("SELECT abs('xyz')").is_err());
    // Non-string args are unaffected.
    assert_eq!(one(&mut e, "SELECT abs(-7)"), Value::Int(7));
    // trunc is left ambiguous, matching PG ("function trunc(unknown) is not unique").
    assert!(e.execute("SELECT trunc('3.9')").is_err());
}