icydb_core/
index.rs

1use std::fmt::{self, Display};
2
3///
4/// IndexSpec
5/// Runtime-only descriptor for an index used by the executor and stores.
6/// Keeps core decoupled from the schema `Index` shape.
7///
8#[derive(Clone, Copy, Debug, Eq, PartialEq)]
9pub struct IndexSpec {
10    pub store: &'static str,
11    pub fields: &'static [&'static str],
12    pub unique: bool,
13}
14
15impl IndexSpec {
16    #[must_use]
17    pub const fn new(store: &'static str, fields: &'static [&'static str], unique: bool) -> Self {
18        Self {
19            store,
20            fields,
21            unique,
22        }
23    }
24
25    #[must_use]
26    /// Whether this index's field prefix matches the start of another index.
27    pub fn is_prefix_of(&self, other: &Self) -> bool {
28        self.fields.len() < other.fields.len() && other.fields.starts_with(self.fields)
29    }
30}
31
32impl Display for IndexSpec {
33    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
34        let fields = self.fields.join(", ");
35
36        if self.unique {
37            write!(f, "UNIQUE {}({})", self.store, fields)
38        } else {
39            write!(f, "{}({})", self.store, fields)
40        }
41    }
42}
icydb_core/index.rs

icydb_core/
index.rs
