spg-engine 7.37.19

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
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

//! v7.37.17 (17.6 siblings) — array_upper / array_lower /
//! array_ndims / array_dims.

use spg_engine::{Engine, QueryResult};

fn first(e: &mut Engine, sql: &str) -> spg_storage::Value<'static> {
    let r = e
        .execute(sql)
        .unwrap_or_else(|err| panic!("{sql}: {err:?}"));
    let QueryResult::Rows { rows, .. } = r else {
        panic!("expected Rows");
    };
    rows[0].values[0].clone()
}

#[test]
fn array_upper_lower_1d() {
    let mut e = Engine::new();
    match first(&mut e, "SELECT array_lower(ARRAY[10, 20, 30], 1)") {
        spg_storage::Value::Int(1) => {}
        other => panic!("got {other:?}"),
    }
    match first(&mut e, "SELECT array_upper(ARRAY[10, 20, 30], 1)") {
        spg_storage::Value::Int(3) => {}
        other => panic!("got {other:?}"),
    }
}

#[test]
fn array_upper_lower_null_for_other_dims() {
    let mut e = Engine::new();
    // SPG models 1-D arrays only; dim=2 → NULL.
    assert!(matches!(
        first(&mut e, "SELECT array_upper(ARRAY[1, 2, 3], 2)"),
        spg_storage::Value::Null
    ));
    assert!(matches!(
        first(&mut e, "SELECT array_lower(ARRAY[1, 2, 3], 2)"),
        spg_storage::Value::Null
    ));
}

#[test]
fn array_ndims_returns_1_for_non_empty() {
    let mut e = Engine::new();
    match first(&mut e, "SELECT array_ndims(ARRAY[1, 2, 3])") {
        spg_storage::Value::Int(1) => {}
        other => panic!("got {other:?}"),
    }
    match first(&mut e, "SELECT array_ndims(ARRAY['a', 'b'])") {
        spg_storage::Value::Int(1) => {}
        other => panic!("got {other:?}"),
    }
}

#[test]
fn array_dims_returns_bracket_range() {
    let mut e = Engine::new();
    match first(&mut e, "SELECT array_dims(ARRAY[1, 2, 3, 4, 5])") {
        spg_storage::Value::Text(s) => assert_eq!(s.as_ref(), "[1:5]"),
        other => panic!("got {other:?}"),
    }
    match first(&mut e, "SELECT array_dims(ARRAY['x'])") {
        spg_storage::Value::Text(s) => assert_eq!(s.as_ref(), "[1:1]"),
        other => panic!("got {other:?}"),
    }
}

/// U18 (read01 A-group): the dimension/length array functions
/// (array_length / array_upper / array_lower / array_ndims /
/// array_dims / cardinality) are element-type-agnostic in PG, but
/// SPG only matched Text/Int/BigInt arms and errored on every other
/// element type (bool[], date[], numeric[], float8[], ...). Values
/// asserted against live PG 18.4.
#[test]
fn dimension_funcs_cover_all_element_types() {
    let mut e = Engine::new();
    let i = |e: &mut Engine, sql: &str| match first(e, sql) {
        spg_storage::Value::Int(n) => n,
        other => panic!("{sql}: got {other:?}"),
    };
    // bool[]
    assert_eq!(i(&mut e, "SELECT array_length(ARRAY[true,false], 1)"), 2);
    assert_eq!(i(&mut e, "SELECT cardinality(ARRAY[true,false,true])"), 3);
    assert_eq!(i(&mut e, "SELECT array_ndims(ARRAY[true,false])"), 1);
    // date[]
    assert_eq!(
        i(
            &mut e,
            "SELECT array_upper(ARRAY['2024-01-01'::date,'2024-01-02'], 1)"
        ),
        2
    );
    // numeric[] / float8[]
    assert_eq!(
        i(&mut e, "SELECT array_lower(ARRAY[1.5,2.5]::numeric[], 1)"),
        1
    );
    assert_eq!(
        i(
            &mut e,
            "SELECT array_upper(ARRAY[1.5,2.5,3.5]::float8[], 1)"
        ),
        3
    );
    assert_eq!(
        i(&mut e, "SELECT array_ndims(ARRAY[1.5,2.5]::numeric[])"),
        1
    );
    // array_dims on bool[]
    match first(&mut e, "SELECT array_dims(ARRAY[true,false,true])") {
        spg_storage::Value::Text(s) => assert_eq!(s.as_ref(), "[1:3]"),
        other => panic!("got {other:?}"),
    }
    // Empty typed array → NULL length/ndims (PG: no dimensions).
    assert!(matches!(
        first(&mut e, "SELECT array_length(ARRAY[]::bool[], 1)"),
        spg_storage::Value::Null
    ));
}

#[test]
fn array_out_quotes_whitespace_elements() {
    // PG array_out quotes an element containing newline / carriage-return /
    // form-feed (array_isspace), not just space/tab. Live-PG18.4-verified.
    let mut e = Engine::new();
    let txt = |e: &mut Engine, sql: &str| -> String {
        match first(e, sql) {
            spg_storage::Value::Text(s) => s.to_string(),
            o => panic!("{sql}: {o:?}"),
        }
    };
    assert_eq!(txt(&mut e, "SELECT (ARRAY[E'a\\nb'])::text"), "{\"a\nb\"}");
    assert_eq!(txt(&mut e, "SELECT (ARRAY[E'a\\rb'])::text"), "{\"a\rb\"}");
    assert_eq!(
        txt(&mut e, "SELECT (ARRAY[E'a\\fb'])::text"),
        "{\"a\u{c}b\"}"
    );
    // Tab still quotes (regression guard) and a plain element does not.
    assert_eq!(txt(&mut e, "SELECT (ARRAY[E'a\\tb'])::text"), "{\"a\tb\"}");
    assert_eq!(txt(&mut e, "SELECT (ARRAY['ab'])::text"), "{ab}");
}