Struct SearchIndexBTreeRange

pub struct SearchIndexBTreeRange<P, V> { /* private fields */ }

SearchIndexBTreeRange is a index backed by a BTreeMap that can match Exact, InRange, OutRange, Minimum and Maximum queries.

Example

use attribute_search_engine::{SearchIndex, SearchIndexBTreeRange};
use std::collections::HashSet;
use attribute_search_engine::Query;

let mut index_age = SearchIndexBTreeRange::<usize, i32>::new();
index_age.insert(0, 17);
index_age.insert(1, 42);
index_age.insert(2, 31);
index_age.insert(3, 26);

let result = index_age.search(&Query::Exact("<unused>".into(), "42".into()));
assert_eq!(result, Ok(HashSet::from_iter(vec![1])));

let result = index_age.search(&Query::InRange("<unused>".into(), "20".into(), "40".into()));
assert_eq!(result, Ok(HashSet::from_iter(vec![2, 3])));

Implementations

impl<P, V> SearchIndexBTreeRange<P, V>

where P: Eq + Hash + Clone + 'static, V: Ord + FromStr + 'static,

pub fn new() -> Self

Creates a new SearchIndexBTreeRange.

Example

use attribute_search_engine::SearchIndexBTreeRange;

let index = SearchIndexBTreeRange::<usize, i32>::new();

pub fn insert(&mut self, primary_id: P, attribute_value: V)

Insert a new entry in the index.

Example

use attribute_search_engine::SearchIndexBTreeRange;

let mut index = SearchIndexBTreeRange::<usize, i32>::new();

// You insert an entry by giving a row / primary id and an attribute value:
index.insert(123, 42);
// The same row / primary id can have multiple attributes assigned:
index.insert(123, 69);
// Add as much entries as you want for as many rows you want:
index.insert(124, 32);

Trait Implementations

impl<P, V> Default for SearchIndexBTreeRange<P, V>

where P: Eq + Hash + Clone + 'static, V: Ord + FromStr + 'static,

fn default() -> Self

Returns the “default value” for a type.

impl<P, V> SearchIndex<P> for SearchIndexBTreeRange<P, V>

where P: Eq + Hash + Clone + 'static, V: Ord + FromStr + 'static,

fn search(&self, query: &Query) -> Result<HashSet<P>>

Perform a search on an index.

fn supported_queries(&self) -> SupportedQueries

Returns which queries are directly supported by an index.