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Remove excluded document in criteria iterations

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- pass excluded document to criteria to remove them in higher levels of the bucket-sort
- merge already returned document with excluded documents to avoid duplicas

Related to #125 and #112
Fix #170
This commit is contained in:
many 2021-04-28 18:01:23 +02:00
parent 374c2782ad
commit ee09e50e7f
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GPG Key ID: 2CEF23B75189EACA
9 changed files with 149 additions and 62 deletions
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13
milli/src/search/criteria/asc_desc.rs
View File

@ -12,9 +12,8 @@ use crate::heed_codec::facet::FieldDocIdFacetF64Codec;
use crate::search::criteria::{resolve_query_tree, CriteriaBuilder};
use crate::search::facet::FacetIter;
use crate::search::query_tree::Operation;
use crate::search::WordDerivationsCache;
use crate::{FieldsIdsMap, FieldId, Index};
use super::{Criterion, CriterionResult};
use super::{Criterion, CriterionParameters, CriterionResult};
/// Threshold on the number of candidates that will make
/// the system to choose between one algorithm or another.
@ -85,7 +84,7 @@ impl<'t> AscDesc<'t> {
impl<'t> Criterion for AscDesc<'t> {
#[logging_timer::time("AscDesc::{}")]
fn next(&mut self, wdcache: &mut WordDerivationsCache) -> anyhow::Result<Option<CriterionResult>> {
fn next(&mut self, params: &mut CriterionParameters) -> anyhow::Result<Option<CriterionResult>> {
loop {
debug!("Facet {}({}) iteration",
if self.ascending { "Asc" } else { "Desc" }, self.field_name
@ -93,7 +92,7 @@ impl<'t> Criterion for AscDesc<'t> {
match self.candidates.next().transpose()? {
None => {
match self.parent.next(wdcache)? {
match self.parent.next(params)? {
Some(CriterionResult { query_tree, candidates, bucket_candidates }) => {
let candidates_is_some = candidates.is_some();
self.query_tree = query_tree;
@ -104,7 +103,8 @@ impl<'t> Criterion for AscDesc<'t> {
},
(Some(qt), None) => {
let context = CriteriaBuilder::new(&self.rtxn, &self.index)?;
let mut candidates = resolve_query_tree(&context, qt, &mut HashMap::new(), wdcache)?;
let mut candidates = resolve_query_tree(&context, qt, &mut HashMap::new(), params.wdcache)?;
candidates -= params.excluded_candidates;
candidates.intersect_with(&self.faceted_candidates);
candidates
},
@ -138,7 +138,8 @@ impl<'t> Criterion for AscDesc<'t> {
None => return Ok(None),
}
},
Some(candidates) => {
Some(mut candidates) => {
candidates -= params.excluded_candidates;
return Ok(Some(CriterionResult {
query_tree: self.query_tree.clone(),
candidates: Some(candidates),

22
milli/src/search/criteria/attribute.rs
View File

@ -9,7 +9,7 @@ use crate::{TreeLevel, search::build_dfa};
use crate::search::criteria::Query;
use crate::search::query_tree::{Operation, QueryKind};
use crate::search::{word_derivations, WordDerivationsCache};
use super::{Criterion, CriterionResult, Context, resolve_query_tree};
use super::{Criterion, CriterionParameters, CriterionResult, Context, resolve_query_tree};
/// To be able to divide integers by the number of words in the query
/// we want to find a multiplier that allow us to divide by any number between 1 and 10.
@ -20,6 +20,10 @@ const LCM_10_FIRST_NUMBERS: u32 = 2520;
/// we use 4 as the exponentiation base and the level as the exponent.
const LEVEL_EXPONENTIATION_BASE: u32 = 4;
/// Threshold on the number of candidates that will make
/// the system to choose between one algorithm or another.
const CANDIDATES_THRESHOLD: u64 = 1000;
pub struct Attribute<'t> {
ctx: &'t dyn Context<'t>,
query_tree: Option<Operation>,
@ -46,7 +50,12 @@ impl<'t> Attribute<'t> {
impl<'t> Criterion for Attribute<'t> {
#[logging_timer::time("Attribute::{}")]
fn next(&mut self, wdcache: &mut WordDerivationsCache) -> anyhow::Result<Option<CriterionResult>> {
fn next(&mut self, params: &mut CriterionParameters) -> anyhow::Result<Option<CriterionResult>> {
// remove excluded candidates when next is called, instead of doing it in the loop.
if let Some(candidates) = self.candidates.as_mut() {
*candidates -= params.excluded_candidates;
}
loop {
match (&self.query_tree, &mut self.candidates) {
(_, Some(candidates)) if candidates.is_empty() => {
@ -61,7 +70,7 @@ impl<'t> Criterion for Attribute<'t> {
flatten_query_tree(&qt)
});
let found_candidates = if candidates.len() < 1000 {
let found_candidates = if candidates.len() < CANDIDATES_THRESHOLD {
let current_buckets = match self.current_buckets.as_mut() {
Some(current_buckets) => current_buckets,
None => {
@ -81,7 +90,7 @@ impl<'t> Criterion for Attribute<'t> {
},
}
} else {
match set_compute_candidates(self.ctx, flattened_query_tree, candidates, wdcache)? {
match set_compute_candidates(self.ctx, flattened_query_tree, candidates, params.wdcache)? {
Some(candidates) => candidates,
None => {
return Ok(Some(CriterionResult {
@ -102,7 +111,8 @@ impl<'t> Criterion for Attribute<'t> {
}));
},
(Some(qt), None) => {
let query_tree_candidates = resolve_query_tree(self.ctx, &qt, &mut HashMap::new(), wdcache)?;
let mut query_tree_candidates = resolve_query_tree(self.ctx, &qt, &mut HashMap::new(), params.wdcache)?;
query_tree_candidates -= params.excluded_candidates;
self.bucket_candidates |= &query_tree_candidates;
self.candidates = Some(query_tree_candidates);
},
@ -114,7 +124,7 @@ impl<'t> Criterion for Attribute<'t> {
}));
},
(None, None) => {
match self.parent.next(wdcache)? {
match self.parent.next(params)? {
Some(CriterionResult { query_tree: None, candidates: None, bucket_candidates }) => {
return Ok(Some(CriterionResult {
query_tree: None,

30
milli/src/search/criteria/final.rs
View File

@ -5,7 +5,7 @@ use roaring::RoaringBitmap;
use crate::search::query_tree::Operation;
use crate::search::WordDerivationsCache;
use super::{resolve_query_tree, Criterion, CriterionResult, Context};
use super::{resolve_query_tree, Criterion, CriterionResult, CriterionParameters, Context};
/// The result of a call to the fetcher.
#[derive(Debug, Clone, PartialEq)]
@ -22,27 +22,39 @@ pub struct Final<'t> {
ctx: &'t dyn Context<'t>,
parent: Box<dyn Criterion + 't>,
wdcache: WordDerivationsCache,
returned_candidates: RoaringBitmap,
}
impl<'t> Final<'t> {
pub fn new(ctx: &'t dyn Context<'t>, parent: Box<dyn Criterion + 't>) -> Final<'t> {
Final { ctx, parent, wdcache: WordDerivationsCache::new() }
Final { ctx, parent, wdcache: WordDerivationsCache::new(), returned_candidates: RoaringBitmap::new() }
}
#[logging_timer::time("Final::{}")]
pub fn next(&mut self) -> anyhow::Result<Option<FinalResult>> {
pub fn next(&mut self, excluded_candidates: &RoaringBitmap) -> anyhow::Result<Option<FinalResult>> {
loop {
debug!("Final iteration");
let mut criterion_parameters = CriterionParameters {
wdcache: &mut self.wdcache,
// returned_candidates is merged with excluded_candidates to avoid duplicas
excluded_candidates: &(&self.returned_candidates | excluded_candidates),
};
match self.parent.next(&mut self.wdcache)? {
match self.parent.next(&mut criterion_parameters)? {
Some(CriterionResult { query_tree, candidates, mut bucket_candidates }) => {
let candidates = match (&query_tree, candidates) {
(_, Some(candidates)) => candidates,
(Some(qt), None) => resolve_query_tree(self.ctx, qt, &mut HashMap::new(), &mut self.wdcache)?,
(None, None) => self.ctx.documents_ids()?,
let candidates = match candidates {
Some(candidates) => candidates,
None => {
let candidates = match query_tree.as_ref() {
Some(qt) => resolve_query_tree(self.ctx, qt, &mut HashMap::new(), &mut self.wdcache)?,
None => self.ctx.documents_ids()?,
};
bucket_candidates |= &candidates;
candidates
}
};
bucket_candidates.union_with(&candidates);
self.returned_candidates |= &candidates;
return Ok(Some(FinalResult { query_tree, candidates, bucket_candidates }));
},

5
milli/src/search/criteria/initial.rs
View File

@ -1,9 +1,8 @@
use roaring::RoaringBitmap;
use crate::search::query_tree::Operation;
use crate::search::WordDerivationsCache;
use super::{Criterion, CriterionResult};
use super::{Criterion, CriterionResult, CriterionParameters};
pub struct Initial {
answer: Option<CriterionResult>
@ -22,7 +21,7 @@ impl Initial {
impl Criterion for Initial {
#[logging_timer::time("Initial::{}")]
fn next(&mut self, _: &mut WordDerivationsCache) -> anyhow::Result<Option<CriterionResult>> {
fn next(&mut self, _: &mut CriterionParameters) -> anyhow::Result<Option<CriterionResult>> {
Ok(self.answer.take())
}
}

8
milli/src/search/criteria/mod.rs
View File

@ -25,7 +25,7 @@ mod words;
pub mod r#final;
pub trait Criterion {
fn next(&mut self, wdcache: &mut WordDerivationsCache) -> anyhow::Result<Option<CriterionResult>>;
fn next(&mut self, params: &mut CriterionParameters) -> anyhow::Result<Option<CriterionResult>>;
}
/// The result of a call to the parent criterion.
@ -40,6 +40,12 @@ pub struct CriterionResult {
bucket_candidates: RoaringBitmap,
}
#[derive(Debug, PartialEq)]
pub struct CriterionParameters<'a> {
wdcache: &'a mut WordDerivationsCache,
excluded_candidates: &'a RoaringBitmap,
}
/// Either a set of candidates that defines the candidates
/// that are allowed to be returned,
/// or the candidates that must never be returned.

38
milli/src/search/criteria/proximity.rs
View File

@ -8,10 +8,26 @@ use log::debug;
use crate::{DocumentId, Position, search::{query_tree::QueryKind}};
use crate::search::query_tree::{maximum_proximity, Operation, Query};
use crate::search::{build_dfa, WordDerivationsCache};
use super::{Criterion, CriterionResult, Context, query_docids, query_pair_proximity_docids, resolve_query_tree};
use super::{
Context,
Criterion,
CriterionParameters,
CriterionResult,
query_docids,
query_pair_proximity_docids,
resolve_query_tree,
};
type Cache = HashMap<(Operation, u8), Vec<(Query, Query, RoaringBitmap)>>;
/// Threshold on the number of candidates that will make
/// the system choose between one algorithm or another.
const CANDIDATES_THRESHOLD: u64 = 1000;
/// Threshold on the number of proximity that will make
/// the system choose between one algorithm or another.
const PROXIMITY_THRESHOLD: u8 = 0;
pub struct Proximity<'t> {
ctx: &'t dyn Context<'t>,
/// ((max_proximity, query_tree), allowed_candidates)
@ -39,7 +55,12 @@ impl<'t> Proximity<'t> {
impl<'t> Criterion for Proximity<'t> {
#[logging_timer::time("Proximity::{}")]
fn next(&mut self, wdcache: &mut WordDerivationsCache) -> anyhow::Result<Option<CriterionResult>> {
fn next(&mut self, params: &mut CriterionParameters) -> anyhow::Result<Option<CriterionResult>> {
// remove excluded candidates when next is called, instead of doing it in the loop.
if let Some((_, candidates)) = self.state.as_mut() {
*candidates -= params.excluded_candidates;
}
loop {
debug!("Proximity at iteration {} (max prox {:?}) ({:?})",
self.proximity,
@ -55,7 +76,7 @@ impl<'t> Criterion for Proximity<'t> {
if self.proximity as usize > *max_prox {
self.state = None; // reset state
} else {
let mut new_candidates = if candidates.len() <= 1000 && self.proximity > 0 {
let mut new_candidates = if candidates.len() <= CANDIDATES_THRESHOLD && self.proximity > PROXIMITY_THRESHOLD {
if let Some(cache) = self.plane_sweep_cache.as_mut() {
match cache.next() {
Some((p, candidates)) => {
@ -72,7 +93,7 @@ impl<'t> Criterion for Proximity<'t> {
self.ctx,
query_tree,
candidates,
wdcache,
params.wdcache,
)?;
self.plane_sweep_cache = Some(cache.into_iter());
@ -84,7 +105,7 @@ impl<'t> Criterion for Proximity<'t> {
&query_tree,
self.proximity,
&mut self.candidates_cache,
wdcache,
params.wdcache,
)?
};
@ -109,7 +130,7 @@ impl<'t> Criterion for Proximity<'t> {
}));
},
None => {
match self.parent.next(wdcache)? {
match self.parent.next(params)? {
Some(CriterionResult { query_tree: None, candidates: None, bucket_candidates }) => {
return Ok(Some(CriterionResult {
query_tree: None,
@ -121,7 +142,10 @@ impl<'t> Criterion for Proximity<'t> {
let candidates_is_some = candidates.is_some();
let candidates = match (&query_tree, candidates) {
(_, Some(candidates)) => candidates,
(Some(qt), None) => resolve_query_tree(self.ctx, qt, &mut HashMap::new(), wdcache)?,
(Some(qt), None) => {
let candidates = resolve_query_tree(self.ctx, qt, &mut HashMap::new(), params.wdcache)?;
candidates - params.excluded_candidates
},
(None, None) => RoaringBitmap::new(),
};

74
milli/src/search/criteria/typo.rs
View File

@ -6,7 +6,15 @@ use roaring::RoaringBitmap;
use crate::search::query_tree::{maximum_typo, Operation, Query, QueryKind};
use crate::search::{word_derivations, WordDerivationsCache};
use super::{Candidates, Criterion, CriterionResult, Context, query_docids, query_pair_proximity_docids};
use super::{
Candidates,
Context,
Criterion,
CriterionParameters,
CriterionResult,
query_docids,
query_pair_proximity_docids
};
pub struct Typo<'t> {
ctx: &'t dyn Context<'t>,
@ -34,8 +42,14 @@ impl<'t> Typo<'t> {
impl<'t> Criterion for Typo<'t> {
#[logging_timer::time("Typo::{}")]
fn next(&mut self, wdcache: &mut WordDerivationsCache) -> anyhow::Result<Option<CriterionResult>> {
fn next(&mut self, params: &mut CriterionParameters) -> anyhow::Result<Option<CriterionResult>> {
use Candidates::{Allowed, Forbidden};
// remove excluded candidates when next is called, instead of doing it in the loop.
match &mut self.candidates {
Allowed(candidates) => *candidates -= params.excluded_candidates,
Forbidden(candidates) => *candidates |= params.excluded_candidates,
}
loop {
debug!("Typo at iteration {} ({:?})", self.number_typos, self.candidates);
@ -54,9 +68,9 @@ impl<'t> Criterion for Typo<'t> {
} else {
let fst = self.ctx.words_fst();
let new_query_tree = if self.number_typos < 2 {
alterate_query_tree(&fst, query_tree.clone(), self.number_typos, wdcache)?
alterate_query_tree(&fst, query_tree.clone(), self.number_typos, params.wdcache)?
} else if self.number_typos == 2 {
*query_tree = alterate_query_tree(&fst, query_tree.clone(), self.number_typos, wdcache)?;
*query_tree = alterate_query_tree(&fst, query_tree.clone(), self.number_typos, params.wdcache)?;
query_tree.clone()
} else {
query_tree.clone()
@ -67,7 +81,7 @@ impl<'t> Criterion for Typo<'t> {
&new_query_tree,
self.number_typos,
&mut self.candidates_cache,
wdcache,
params.wdcache,
)?;
new_candidates.intersect_with(&candidates);
candidates.difference_with(&new_candidates);
@ -87,9 +101,9 @@ impl<'t> Criterion for Typo<'t> {
} else {
let fst = self.ctx.words_fst();
let new_query_tree = if self.number_typos < 2 {
alterate_query_tree(&fst, query_tree.clone(), self.number_typos, wdcache)?
alterate_query_tree(&fst, query_tree.clone(), self.number_typos, params.wdcache)?
} else if self.number_typos == 2 {
*query_tree = alterate_query_tree(&fst, query_tree.clone(), self.number_typos, wdcache)?;
*query_tree = alterate_query_tree(&fst, query_tree.clone(), self.number_typos, params.wdcache)?;
query_tree.clone()
} else {
query_tree.clone()
@ -100,7 +114,7 @@ impl<'t> Criterion for Typo<'t> {
&new_query_tree,
self.number_typos,
&mut self.candidates_cache,
wdcache,
params.wdcache,
)?;
new_candidates.difference_with(&candidates);
candidates.union_with(&new_candidates);
@ -123,7 +137,7 @@ impl<'t> Criterion for Typo<'t> {
}));
},
(None, Forbidden(_)) => {
match self.parent.next(wdcache)? {
match self.parent.next(params)? {
Some(CriterionResult { query_tree: None, candidates: None, bucket_candidates }) => {
return Ok(Some(CriterionResult {
query_tree: None,
@ -134,7 +148,9 @@ impl<'t> Criterion for Typo<'t> {
Some(CriterionResult { query_tree, candidates, bucket_candidates }) => {
self.query_tree = query_tree.map(|op| (maximum_typo(&op), op));
self.number_typos = 0;
self.candidates = candidates.map_or_else(Candidates::default, Candidates::Allowed);
self.candidates = candidates.map_or_else(|| {
Candidates::Forbidden(params.excluded_candidates.clone())
}, Candidates::Allowed);
self.bucket_candidates.union_with(&bucket_candidates);
},
None => return Ok(None),
@ -324,12 +340,16 @@ mod test {
let query_tree = None;
let facet_candidates = None;
let mut wdcache = WordDerivationsCache::new();
let mut criterion_parameters = CriterionParameters {
wdcache: &mut WordDerivationsCache::new(),
excluded_candidates: &RoaringBitmap::new(),
};
let parent = Initial::new(query_tree, facet_candidates);
let mut criteria = Typo::new(&context, Box::new(parent));
assert!(criteria.next(&mut wdcache).unwrap().unwrap().candidates.is_none());
assert!(criteria.next(&mut wdcache).unwrap().is_none());
assert!(criteria.next(&mut criterion_parameters).unwrap().unwrap().candidates.is_none());
assert!(criteria.next(&mut criterion_parameters).unwrap().is_none());
}
#[test]
@ -345,7 +365,10 @@ mod test {
let facet_candidates = None;
let mut wdcache = WordDerivationsCache::new();
let mut criterion_parameters = CriterionParameters {
wdcache: &mut WordDerivationsCache::new(),
excluded_candidates: &RoaringBitmap::new(),
};
let parent = Initial::new(Some(query_tree), facet_candidates);
let mut criteria = Typo::new(&context, Box::new(parent));
@ -364,7 +387,7 @@ mod test {
bucket_candidates: candidates_1,
};
assert_eq!(criteria.next(&mut wdcache).unwrap(), Some(expected_1));
assert_eq!(criteria.next(&mut criterion_parameters).unwrap(), Some(expected_1));
let candidates_2 = (
context.word_docids("split").unwrap().unwrap()
@ -386,7 +409,7 @@ mod test {
bucket_candidates: candidates_2,
};
assert_eq!(criteria.next(&mut wdcache).unwrap(), Some(expected_2));
assert_eq!(criteria.next(&mut criterion_parameters).unwrap(), Some(expected_2));
}
#[test]
@ -395,7 +418,10 @@ mod test {
let query_tree = None;
let facet_candidates = context.word_docids("earth").unwrap().unwrap();
let mut wdcache = WordDerivationsCache::new();
let mut criterion_parameters = CriterionParameters {
wdcache: &mut WordDerivationsCache::new(),
excluded_candidates: &RoaringBitmap::new(),
};
let parent = Initial::new(query_tree, Some(facet_candidates.clone()));
let mut criteria = Typo::new(&context, Box::new(parent));
@ -406,10 +432,10 @@ mod test {
};
// first iteration, returns the facet candidates
assert_eq!(criteria.next(&mut wdcache).unwrap(), Some(expected));
assert_eq!(criteria.next(&mut criterion_parameters).unwrap(), Some(expected));
// second iteration, returns None because there is no more things to do
assert!(criteria.next(&mut wdcache).unwrap().is_none());
assert!(criteria.next(&mut criterion_parameters).unwrap().is_none());
}
#[test]
@ -425,7 +451,11 @@ mod test {
let facet_candidates = context.word_docids("earth").unwrap().unwrap();
let mut wdcache = WordDerivationsCache::new();
let mut criterion_parameters = CriterionParameters {
wdcache: &mut WordDerivationsCache::new(),
excluded_candidates: &RoaringBitmap::new(),
};
let parent = Initial::new(Some(query_tree), Some(facet_candidates.clone()));
let mut criteria = Typo::new(&context, Box::new(parent));
@ -444,7 +474,7 @@ mod test {
bucket_candidates: facet_candidates.clone(),
};
assert_eq!(criteria.next(&mut wdcache).unwrap(), Some(expected_1));
assert_eq!(criteria.next(&mut criterion_parameters).unwrap(), Some(expected_1));
let candidates_2 = (
context.word_docids("split").unwrap().unwrap()
@ -466,6 +496,6 @@ mod test {
bucket_candidates: RoaringBitmap::new(),
};
assert_eq!(criteria.next(&mut wdcache).unwrap(), Some(expected_2));
assert_eq!(criteria.next(&mut criterion_parameters).unwrap(), Some(expected_2));
}
}

13
milli/src/search/criteria/words.rs
View File

@ -5,7 +5,7 @@ use log::debug;
use roaring::RoaringBitmap;
use crate::search::query_tree::Operation;
use super::{resolve_query_tree, Criterion, CriterionResult, Context, WordDerivationsCache};
use super::{Context, Criterion, CriterionParameters, CriterionResult, resolve_query_tree};
pub struct Words<'t> {
ctx: &'t dyn Context<'t>,
@ -31,7 +31,12 @@ impl<'t> Words<'t> {
impl<'t> Criterion for Words<'t> {
#[logging_timer::time("Words::{}")]
fn next(&mut self, wdcache: &mut WordDerivationsCache) -> anyhow::Result<Option<CriterionResult>> {
fn next(&mut self, params: &mut CriterionParameters) -> anyhow::Result<Option<CriterionResult>> {
// remove excluded candidates when next is called, instead of doing it in the loop.
if let Some(candidates) = self.candidates.as_mut() {
*candidates -= params.excluded_candidates;
}
loop {
debug!("Words at iteration {} ({:?})", self.query_trees.len(), self.candidates);
@ -45,7 +50,7 @@ impl<'t> Criterion for Words<'t> {
}));
},
(Some(qt), Some(candidates)) => {
let mut found_candidates = resolve_query_tree(self.ctx, &qt, &mut self.candidates_cache, wdcache)?;
let mut found_candidates = resolve_query_tree(self.ctx, &qt, &mut self.candidates_cache, params.wdcache)?;
found_candidates.intersect_with(&candidates);
candidates.difference_with(&found_candidates);
@ -71,7 +76,7 @@ impl<'t> Criterion for Words<'t> {
}));
},
(None, None) => {
match self.parent.next(wdcache)? {
match self.parent.next(params)? {
Some(CriterionResult { query_tree: None, candidates: None, bucket_candidates }) => {
return Ok(Some(CriterionResult {
query_tree: None,

8
milli/src/search/mod.rs
View File

@ -165,13 +165,13 @@ impl<'a> Search<'a> {
) -> anyhow::Result<SearchResult> {
let mut offset = self.offset;
let mut initial_candidates = RoaringBitmap::new();
let mut excluded_documents = RoaringBitmap::new();
let mut excluded_candidates = RoaringBitmap::new();
let mut documents_ids = Vec::with_capacity(self.limit);
while let Some(FinalResult { candidates, bucket_candidates, .. }) = criteria.next()? {
while let Some(FinalResult { candidates, bucket_candidates, .. }) = criteria.next(&excluded_candidates)? {
debug!("Number of candidates found {}", candidates.len());
let excluded = take(&mut excluded_documents);
let excluded = take(&mut excluded_candidates);
let mut candidates = distinct.distinct(candidates, excluded);
@ -186,7 +186,7 @@ impl<'a> Search<'a> {
documents_ids.push(candidate?);
}
if documents_ids.len() == self.limit { break }
excluded_documents = candidates.into_excluded();
excluded_candidates = candidates.into_excluded();
}
Ok(SearchResult { matching_words, candidates: initial_candidates, documents_ids })