icydb-core 0.199.30

IcyDB — A schema-first typed query engine and persistence runtime for Internet Computer canisters
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

//! Module: db::query::admission::render
//! Responsibility: stable verbose EXPLAIN text rendering for read admission.
//! Does not own: admission policy, plan summary extraction, or diagnostics.
//! Boundary: keeps display formatting separate from admission decisions.

use std::fmt::Write as _;

use super::{QueryAdmissionRejection, QueryAdmissionSummary};

pub(super) fn render_text_block(summary: &QueryAdmissionSummary) -> String {
    let mut out = String::from("admission:");
    push_text_field(&mut out, "lane", summary.lane().as_str());
    push_text_field(&mut out, "decision", summary.decision().as_str());
    push_text_field(
        &mut out,
        "reason",
        summary
            .rejection()
            .map_or("none", QueryAdmissionRejection::as_str),
    );
    push_text_field(&mut out, "plan_shape", summary.plan_shape().as_str());
    push_text_field(
        &mut out,
        "selected_access",
        summary.selected_access().as_str(),
    );
    push_text_field(
        &mut out,
        "selected_index",
        summary.selected_index().unwrap_or("none"),
    );
    push_text_option_u32(&mut out, "limit", summary.limit());
    push_text_option_u32(&mut out, "offset", summary.offset());
    push_text_option_u64(&mut out, "scan_bound", summary.scan_bound());
    push_text_field(
        &mut out,
        "scan_bound_kind",
        summary.scan_bound_kind().as_str(),
    );
    push_text_option_u32(&mut out, "returned_row_bound", summary.returned_row_bound());
    push_text_field(
        &mut out,
        "returned_row_bound_kind",
        summary.returned_row_bound_kind().as_str(),
    );
    push_text_option_u32(
        &mut out,
        "response_byte_bound",
        summary.response_byte_bound(),
    );
    push_text_field(
        &mut out,
        "response_byte_bound_kind",
        summary.response_byte_bound_kind().as_str(),
    );
    push_text_option_u32(
        &mut out,
        "primary_key_input_terms",
        summary.primary_key_input_terms(),
    );
    push_text_option_u32(
        &mut out,
        "primary_key_input_payload_bytes",
        summary.primary_key_input_payload_bytes(),
    );
    push_text_field(
        &mut out,
        "residual_filter",
        summary.residual_filter().as_str(),
    );
    push_text_field(&mut out, "ordering", summary.ordering().as_str());
    push_text_bool(
        &mut out,
        "materialized_sort",
        summary.materialization().materialized_sort(),
    );
    push_text_option_u32(
        &mut out,
        "materialized_rows",
        summary.materialization().materialized_rows(),
    );
    push_text_field(
        &mut out,
        "materialized_row_bound_kind",
        summary.materialization().row_bound_kind().as_str(),
    );

    if let Some(grouped) = summary.grouped() {
        push_text_bool(&mut out, "grouped", true);
        push_text_u64(
            &mut out,
            "group_field_count",
            u64::from(grouped.group_field_count()),
        );
        push_text_u64(
            &mut out,
            "aggregate_count",
            u64::from(grouped.aggregate_count()),
        );
        push_text_u64(
            &mut out,
            "distinct_aggregate_count",
            u64::from(grouped.distinct_aggregate_count()),
        );
        push_text_u64(&mut out, "max_groups", grouped.max_groups());
        push_text_u64(&mut out, "max_group_bytes", grouped.max_group_bytes());
        push_text_bool(&mut out, "having_filter", grouped.has_having_filter());
    } else {
        push_text_bool(&mut out, "grouped", false);
    }

    out
}

fn push_text_field(out: &mut String, key: &str, value: &str) {
    out.push('\n');
    out.push_str("  ");
    out.push_str(key);
    out.push('=');
    out.push_str(value);
}

fn push_text_bool(out: &mut String, key: &str, value: bool) {
    push_text_field(out, key, if value { "true" } else { "false" });
}

fn push_text_u64(out: &mut String, key: &str, value: u64) {
    out.push('\n');
    out.push_str("  ");
    out.push_str(key);
    out.push('=');
    let _ = write!(out, "{value}");
}

fn push_text_option_u32(out: &mut String, key: &str, value: Option<u32>) {
    match value {
        Some(value) => push_text_u64(out, key, u64::from(value)),
        None => push_text_field(out, key, "none"),
    }
}

fn push_text_option_u64(out: &mut String, key: &str, value: Option<u64>) {
    match value {
        Some(value) => push_text_u64(out, key, value),
        None => push_text_field(out, key, "none"),
    }
}