selene-db-gql 1.3.0

ISO/IEC 39075:2024 GQL parser, planner, optimizer, and executor for selene-db.
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

//! Default optimizer rule registry.

use crate::plan::optimize::{
    Rule,
    rules::{
        AndSplitting, CompositeIndexLookup, ConstantFolding, DisjunctiveLabelExpansion,
        ExpandFilterPushdown, FilterPushdown, InListOptimization, IndexOrder, LabelScan,
        NodeFilterExtraction, PredicateReorder, RangeIndexScan, SymmetryBreaking, TopK, WcoJoin,
    },
};

/// Default structural optimizer rule set.
pub static DEFAULT_RULES: &[&'static dyn Rule] = &[
    &ConstantFolding,
    &AndSplitting,
    &FilterPushdown,
    &NodeFilterExtraction,
    &ExpandFilterPushdown,
    &DisjunctiveLabelExpansion,
    &CompositeIndexLookup,
    &InListOptimization,
    &RangeIndexScan,
    &IndexOrder,
    &LabelScan,
    &PredicateReorder,
    &WcoJoin,
    &SymmetryBreaking,
    &TopK,
];

/// Stable names of [`DEFAULT_RULES`] entries, in rule execution order.
pub static RULE_NAMES: &[&str] = &[
    "constant_folding",
    "and_splitting",
    "filter_pushdown",
    "node_filter_extraction",
    "expand_filter_pushdown",
    "disjunctive_label_expansion",
    "composite_index_lookup",
    "in_list_optimization",
    "range_index_scan",
    "index_order",
    "label_scan",
    "predicate_reorder",
    "wco_join",
    "symmetry_breaking",
    "top_k",
];

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn rule_names_match_default_rules() {
        let from_default = DEFAULT_RULES
            .iter()
            .map(|rule| rule.name())
            .collect::<Vec<_>>();
        assert_eq!(from_default, RULE_NAMES);
    }
}