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Merge pull request #106 from meilisearch/optimize-words-typo-criteria

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Optimize the words criterion
This commit is contained in:
Clément Renault 2021-03-10 11:28:46 +01:00 committed by GitHub
commit 38b6e8decd
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7 changed files with 201 additions and 133 deletions
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26
milli/src/search/criteria/asc_desc.rs
View File

@ -160,9 +160,26 @@ impl<'t> Criterion for AscDesc<'t> {
match self.parent.as_mut() { match self.parent.as_mut() {
Some(parent) => { Some(parent) => {
match parent.next(wdcache)? { match parent.next(wdcache)? {
Some(CriterionResult { query_tree, mut candidates, bucket_candidates }) => { Some(CriterionResult { query_tree, candidates, bucket_candidates }) => {
self.query_tree = query_tree; self.query_tree = query_tree;
candidates.intersect_with(&self.faceted_candidates); let candidates = match (&self.query_tree, candidates) {
(_, Some(mut candidates)) => {
candidates.intersect_with(&self.faceted_candidates);
candidates
},
(Some(qt), None) => {
let context = CriteriaBuilder::new(&self.rtxn, &self.index)?;
let mut candidates = resolve_query_tree(&context, qt, &mut HashMap::new(), wdcache)?;
candidates.intersect_with(&self.faceted_candidates);
candidates
},
(None, None) => take(&mut self.faceted_candidates),
};
if bucket_candidates.is_empty() {
self.bucket_candidates.union_with(&candidates);
} else {
self.bucket_candidates.union_with(&bucket_candidates);
}
self.candidates = facet_ordered( self.candidates = facet_ordered(
self.index, self.index,
self.rtxn, self.rtxn,
@ -171,7 +188,6 @@ impl<'t> Criterion for AscDesc<'t> {
self.ascending, self.ascending,
candidates, candidates,
)?; )?;
self.bucket_candidates = bucket_candidates;
}, },
None => return Ok(None), None => return Ok(None),
} }
@ -183,7 +199,7 @@ impl<'t> Criterion for AscDesc<'t> {
return Ok(Some(CriterionResult { return Ok(Some(CriterionResult {
query_tree, query_tree,
candidates: RoaringBitmap::new(), candidates: Some(RoaringBitmap::new()),
bucket_candidates, bucket_candidates,
})); }));
}, },
@ -195,7 +211,7 @@ impl<'t> Criterion for AscDesc<'t> {
return Ok(Some(CriterionResult { return Ok(Some(CriterionResult {
query_tree: self.query_tree.clone(), query_tree: self.query_tree.clone(),
candidates, candidates: Some(candidates),
bucket_candidates, bucket_candidates,
})); }));
}, },

42
milli/src/search/criteria/fetcher.rs
View File

@ -8,12 +8,24 @@ use crate::search::query_tree::Operation;
use crate::search::WordDerivationsCache; use crate::search::WordDerivationsCache;
use super::{resolve_query_tree, Candidates, Criterion, CriterionResult, Context}; use super::{resolve_query_tree, Candidates, Criterion, CriterionResult, Context};
/// The result of a call to the fetcher.
#[derive(Debug, Clone, PartialEq)]
pub struct FetcherResult {
/// The query tree corresponding to the current bucket of the last criterion.
pub query_tree: Option<Operation>,
/// The candidates of the current bucket of the last criterion.
pub candidates: RoaringBitmap,
/// Candidates that comes from the current bucket of the initial criterion.
pub bucket_candidates: RoaringBitmap,
}
pub struct Fetcher<'t> { pub struct Fetcher<'t> {
ctx: &'t dyn Context, ctx: &'t dyn Context,
query_tree: Option<Operation>, query_tree: Option<Operation>,
candidates: Candidates, candidates: Candidates,
parent: Option<Box<dyn Criterion + 't>>, parent: Option<Box<dyn Criterion + 't>>,
should_get_documents_ids: bool, should_get_documents_ids: bool,
wdcache: WordDerivationsCache,
} }
impl<'t> Fetcher<'t> { impl<'t> Fetcher<'t> {
@ -29,6 +41,7 @@ impl<'t> Fetcher<'t> {
candidates: candidates.map_or_else(Candidates::default, Candidates::Allowed), candidates: candidates.map_or_else(Candidates::default, Candidates::Allowed),
parent: None, parent: None,
should_get_documents_ids: true, should_get_documents_ids: true,
wdcache: WordDerivationsCache::new(),
} }
} }
@ -43,13 +56,12 @@ impl<'t> Fetcher<'t> {
candidates: Candidates::default(), candidates: Candidates::default(),
parent: Some(parent), parent: Some(parent),
should_get_documents_ids: true, should_get_documents_ids: true,
wdcache: WordDerivationsCache::new(),
} }
} }
}
impl<'t> Criterion for Fetcher<'t> {
#[logging_timer::time("Fetcher::{}")] #[logging_timer::time("Fetcher::{}")]
fn next(&mut self, wdcache: &mut WordDerivationsCache) -> anyhow::Result<Option<CriterionResult>> { pub fn next(&mut self) -> anyhow::Result<Option<FetcherResult>> {
use Candidates::{Allowed, Forbidden}; use Candidates::{Allowed, Forbidden};
loop { loop {
debug!("Fetcher iteration (should_get_documents_ids: {}) ({:?})", debug!("Fetcher iteration (should_get_documents_ids: {}) ({:?})",
@ -62,14 +74,14 @@ impl<'t> Criterion for Fetcher<'t> {
let candidates = take(&mut self.candidates).into_inner(); let candidates = take(&mut self.candidates).into_inner();
let candidates = match &self.query_tree { let candidates = match &self.query_tree {
Some(qt) if should_get_documents_ids => { Some(qt) if should_get_documents_ids => {
let mut docids = resolve_query_tree(self.ctx, &qt, &mut HashMap::new(), wdcache)?; let mut docids = resolve_query_tree(self.ctx, &qt, &mut HashMap::new(), &mut self.wdcache)?;
docids.intersect_with(&candidates); docids.intersect_with(&candidates);
docids docids
}, },
_ => candidates, _ => candidates,
}; };
return Ok(Some(CriterionResult { return Ok(Some(FetcherResult {
query_tree: self.query_tree.take(), query_tree: self.query_tree.take(),
candidates: candidates.clone(), candidates: candidates.clone(),
bucket_candidates: candidates, bucket_candidates: candidates,
@ -78,15 +90,23 @@ impl<'t> Criterion for Fetcher<'t> {
Forbidden(_) => { Forbidden(_) => {
match self.parent.as_mut() { match self.parent.as_mut() {
Some(parent) => { Some(parent) => {
match parent.next(wdcache)? { match parent.next(&mut self.wdcache)? {
Some(result) => return Ok(Some(result)), Some(CriterionResult { query_tree, candidates, 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) => RoaringBitmap::new(),
};
return Ok(Some(FetcherResult { query_tree, candidates, bucket_candidates }))
},
None => if should_get_documents_ids { None => if should_get_documents_ids {
let candidates = match &self.query_tree { let candidates = match &self.query_tree {
Some(qt) => resolve_query_tree(self.ctx, &qt, &mut HashMap::new(), wdcache)?, Some(qt) => resolve_query_tree(self.ctx, &qt, &mut HashMap::new(), &mut self.wdcache)?,
None => self.ctx.documents_ids()?, None => self.ctx.documents_ids()?,
}; };
return Ok(Some(CriterionResult { return Ok(Some(FetcherResult {
query_tree: self.query_tree.clone(), query_tree: self.query_tree.clone(),
candidates: candidates.clone(), candidates: candidates.clone(),
bucket_candidates: candidates, bucket_candidates: candidates,
@ -96,11 +116,11 @@ impl<'t> Criterion for Fetcher<'t> {
}, },
None => if should_get_documents_ids { None => if should_get_documents_ids {
let candidates = match &self.query_tree { let candidates = match &self.query_tree {
Some(qt) => resolve_query_tree(self.ctx, &qt, &mut HashMap::new(), wdcache)?, Some(qt) => resolve_query_tree(self.ctx, &qt, &mut HashMap::new(), &mut self.wdcache)?,
None => self.ctx.documents_ids()?, None => self.ctx.documents_ids()?,
}; };
return Ok(Some(CriterionResult { return Ok(Some(FetcherResult {
query_tree: self.query_tree.clone(), query_tree: self.query_tree.clone(),
candidates: candidates.clone(), candidates: candidates.clone(),
bucket_candidates: candidates, bucket_candidates: candidates,

31
milli/src/search/criteria/mod.rs
View File

@ -14,10 +14,10 @@ use self::asc_desc::AscDesc;
use self::proximity::Proximity; use self::proximity::Proximity;
use self::fetcher::Fetcher; use self::fetcher::Fetcher;
pub mod typo; mod typo;
pub mod words; mod words;
pub mod asc_desc; mod asc_desc;
pub mod proximity; mod proximity;
pub mod fetcher; pub mod fetcher;
pub trait Criterion { pub trait Criterion {
@ -28,11 +28,12 @@ pub trait Criterion {
#[derive(Debug, Clone, PartialEq)] #[derive(Debug, Clone, PartialEq)]
pub struct CriterionResult { pub struct CriterionResult {
/// The query tree that must be used by the children criterion to fetch candidates. /// The query tree that must be used by the children criterion to fetch candidates.
pub query_tree: Option<Operation>, query_tree: Option<Operation>,
/// The candidates that this criterion is allowed to return subsets of. /// The candidates that this criterion is allowed to return subsets of,
pub candidates: RoaringBitmap, /// if None, it is up to the child to compute the candidates itself.
candidates: Option<RoaringBitmap>,
/// Candidates that comes from the current bucket of the initial criterion. /// Candidates that comes from the current bucket of the initial criterion.
pub bucket_candidates: RoaringBitmap, bucket_candidates: RoaringBitmap,
} }
/// Either a set of candidates that defines the candidates /// Either a set of candidates that defines the candidates
@ -66,7 +67,7 @@ pub trait Context {
fn word_prefix_pair_proximity_docids(&self, left: &str, right: &str, proximity: u8) -> heed::Result<Option<RoaringBitmap>>; fn word_prefix_pair_proximity_docids(&self, left: &str, right: &str, proximity: u8) -> heed::Result<Option<RoaringBitmap>>;
fn words_fst<'t>(&self) -> &'t fst::Set<Cow<[u8]>>; fn words_fst<'t>(&self) -> &'t fst::Set<Cow<[u8]>>;
fn in_prefix_cache(&self, word: &str) -> bool; fn in_prefix_cache(&self, word: &str) -> bool;
fn docid_word_positions(&self, docid: DocumentId, word: &str) -> heed::Result<Option<RoaringBitmap>>; fn docid_words_positions(&self, docid: DocumentId) -> heed::Result<HashMap<String, RoaringBitmap>>;
} }
pub struct CriteriaBuilder<'t> { pub struct CriteriaBuilder<'t> {
rtxn: &'t heed::RoTxn<'t>, rtxn: &'t heed::RoTxn<'t>,
@ -106,9 +107,13 @@ impl<'a> Context for CriteriaBuilder<'a> {
self.words_prefixes_fst.contains(word) self.words_prefixes_fst.contains(word)
} }
fn docid_word_positions(&self, docid: DocumentId, word: &str) -> heed::Result<Option<RoaringBitmap>> { fn docid_words_positions(&self, docid: DocumentId) -> heed::Result<HashMap<String, RoaringBitmap>> {
let key = (docid, word); let mut words_positions = HashMap::new();
self.index.docid_word_positions.get(self.rtxn, &key) for result in self.index.docid_word_positions.prefix_iter(self.rtxn, &(docid, ""))? {
let ((_, word), positions) = result?;
words_positions.insert(word.to_string(), positions);
}
Ok(words_positions)
} }
} }
@ -390,7 +395,7 @@ pub mod test {
self.word_prefix_docids.contains_key(&word.to_string()) self.word_prefix_docids.contains_key(&word.to_string())
} }
fn docid_word_positions(&self, _docid: DocumentId, _word: &str) -> heed::Result<Option<RoaringBitmap>> { fn docid_words_positions(&self, _docid: DocumentId) -> heed::Result<HashMap<String, RoaringBitmap>> {
todo!() todo!()
} }
} }

96
milli/src/search/criteria/proximity.rs
View File

@ -1,15 +1,14 @@
use std::borrow::Cow;
use std::collections::btree_map::{self, BTreeMap}; use std::collections::btree_map::{self, BTreeMap};
use std::collections::hash_map::{HashMap, Entry}; use std::collections::hash_map::HashMap;
use std::mem::take; use std::mem::take;
use roaring::RoaringBitmap; use roaring::RoaringBitmap;
use log::debug; use log::debug;
use crate::{DocumentId, Position, search::{query_tree::QueryKind, word_derivations}}; use crate::{DocumentId, Position, search::{query_tree::QueryKind}};
use crate::search::query_tree::{maximum_proximity, Operation, Query}; use crate::search::query_tree::{maximum_proximity, Operation, Query};
use crate::search::WordDerivationsCache; use crate::search::{build_dfa, WordDerivationsCache};
use super::{Candidates, Criterion, CriterionResult, Context, query_docids, query_pair_proximity_docids}; use super::{Candidates, Criterion, CriterionResult, Context, query_docids, query_pair_proximity_docids, resolve_query_tree};
pub struct Proximity<'t> { pub struct Proximity<'t> {
ctx: &'t dyn Context, ctx: &'t dyn Context,
@ -70,7 +69,7 @@ impl<'t> Criterion for Proximity<'t> {
(_, Allowed(candidates)) if candidates.is_empty() => { (_, Allowed(candidates)) if candidates.is_empty() => {
return Ok(Some(CriterionResult { return Ok(Some(CriterionResult {
query_tree: self.query_tree.take().map(|(_, qt)| qt), query_tree: self.query_tree.take().map(|(_, qt)| qt),
candidates: take(&mut self.candidates).into_inner(), candidates: Some(take(&mut self.candidates).into_inner()),
bucket_candidates: take(&mut self.bucket_candidates), bucket_candidates: take(&mut self.bucket_candidates),
})); }));
}, },
@ -126,7 +125,7 @@ impl<'t> Criterion for Proximity<'t> {
return Ok(Some(CriterionResult { return Ok(Some(CriterionResult {
query_tree: Some(query_tree.clone()), query_tree: Some(query_tree.clone()),
candidates: new_candidates, candidates: Some(new_candidates),
bucket_candidates, bucket_candidates,
})); }));
} }
@ -155,7 +154,7 @@ impl<'t> Criterion for Proximity<'t> {
return Ok(Some(CriterionResult { return Ok(Some(CriterionResult {
query_tree: Some(query_tree.clone()), query_tree: Some(query_tree.clone()),
candidates: new_candidates, candidates: Some(new_candidates),
bucket_candidates, bucket_candidates,
})); }));
} }
@ -164,7 +163,7 @@ impl<'t> Criterion for Proximity<'t> {
let candidates = take(&mut self.candidates).into_inner(); let candidates = take(&mut self.candidates).into_inner();
return Ok(Some(CriterionResult { return Ok(Some(CriterionResult {
query_tree: None, query_tree: None,
candidates: candidates.clone(), candidates: Some(candidates.clone()),
bucket_candidates: candidates, bucket_candidates: candidates,
})); }));
}, },
@ -173,10 +172,21 @@ impl<'t> Criterion for Proximity<'t> {
Some(parent) => { Some(parent) => {
match parent.next(wdcache)? { match parent.next(wdcache)? {
Some(CriterionResult { query_tree, candidates, bucket_candidates }) => { Some(CriterionResult { query_tree, candidates, bucket_candidates }) => {
let candidates = match (&query_tree, candidates) {
(_, Some(candidates)) => candidates,
(Some(qt), None) => resolve_query_tree(self.ctx, qt, &mut HashMap::new(), wdcache)?,
(None, None) => RoaringBitmap::new(),
};
if bucket_candidates.is_empty() {
self.bucket_candidates.union_with(&candidates);
} else {
self.bucket_candidates.union_with(&bucket_candidates);
}
self.query_tree = query_tree.map(|op| (maximum_proximity(&op), op)); self.query_tree = query_tree.map(|op| (maximum_proximity(&op), op));
self.proximity = 0; self.proximity = 0;
self.candidates = Candidates::Allowed(candidates); self.candidates = Candidates::Allowed(candidates);
self.bucket_candidates.union_with(&bucket_candidates);
self.plane_sweep_cache = None; self.plane_sweep_cache = None;
}, },
None => return Ok(None), None => return Ok(None),
@ -347,7 +357,7 @@ fn resolve_plane_sweep_candidates(
docid: DocumentId, docid: DocumentId,
consecutive: bool, consecutive: bool,
rocache: &mut HashMap<&'a Operation, Vec<(Position, u8, Position)>>, rocache: &mut HashMap<&'a Operation, Vec<(Position, u8, Position)>>,
dwpcache: &mut HashMap<String, Option<RoaringBitmap>>, words_positions: &HashMap<String, RoaringBitmap>,
wdcache: &mut WordDerivationsCache, wdcache: &mut WordDerivationsCache,
) -> anyhow::Result<Vec<(Position, u8, Position)>> ) -> anyhow::Result<Vec<(Position, u8, Position)>>
{ {
@ -389,7 +399,7 @@ fn resolve_plane_sweep_candidates(
let mut groups_positions = Vec::with_capacity(groups_len); let mut groups_positions = Vec::with_capacity(groups_len);
for operation in operations { for operation in operations {
let positions = resolve_operation(ctx, operation, docid, rocache, dwpcache, wdcache)?; let positions = resolve_operation(ctx, operation, docid, rocache, words_positions, wdcache)?;
groups_positions.push(positions.into_iter()); groups_positions.push(positions.into_iter());
} }
@ -465,7 +475,7 @@ fn resolve_plane_sweep_candidates(
query_tree: &'a Operation, query_tree: &'a Operation,
docid: DocumentId, docid: DocumentId,
rocache: &mut HashMap<&'a Operation, Vec<(Position, u8, Position)>>, rocache: &mut HashMap<&'a Operation, Vec<(Position, u8, Position)>>,
dwpcache: &mut HashMap<String, Option<RoaringBitmap>>, words_positions: &HashMap<String, RoaringBitmap>,
wdcache: &mut WordDerivationsCache, wdcache: &mut WordDerivationsCache,
) -> anyhow::Result<Vec<(Position, u8, Position)>> ) -> anyhow::Result<Vec<(Position, u8, Position)>>
{ {
@ -476,44 +486,34 @@ fn resolve_plane_sweep_candidates(
} }
let result = match query_tree { let result = match query_tree {
And(ops) => plane_sweep(ctx, ops, docid, false, rocache, dwpcache, wdcache)?, And(ops) => plane_sweep(ctx, ops, docid, false, rocache, words_positions, wdcache)?,
Consecutive(ops) => plane_sweep(ctx, ops, docid, true, rocache, dwpcache, wdcache)?, Consecutive(ops) => plane_sweep(ctx, ops, docid, true, rocache, words_positions, wdcache)?,
Or(_, ops) => { Or(_, ops) => {
let mut result = Vec::new(); let mut result = Vec::new();
for op in ops { for op in ops {
result.extend(resolve_operation(ctx, op, docid, rocache, dwpcache, wdcache)?) result.extend(resolve_operation(ctx, op, docid, rocache, words_positions, wdcache)?)
} }
result.sort_unstable(); result.sort_unstable();
result result
}, },
Operation::Query(Query {prefix, kind}) => { Operation::Query(Query { prefix, kind }) => {
let fst = ctx.words_fst(); let mut result = Vec::new();
let words = match kind { match kind {
QueryKind::Exact { word, .. } => { QueryKind::Exact { word, .. } => {
if *prefix { if *prefix {
Cow::Borrowed(word_derivations(word, true, 0, fst, wdcache)?) let iter = word_derivations(word, true, 0, &words_positions)
.flat_map(|positions| positions.iter().map(|p| (p, 0, p)));
result.extend(iter);
} else { } else {
Cow::Owned(vec![(word.to_string(), 0)]) if let Some(positions) = words_positions.get(word) {
result.extend(positions.iter().map(|p| (p, 0, p)));
}
} }
}, },
QueryKind::Tolerant { typo, word } => { QueryKind::Tolerant { typo, word } => {
Cow::Borrowed(word_derivations(word, *prefix, *typo, fst, wdcache)?) let iter = word_derivations(word, *prefix, *typo, &words_positions)
} .flat_map(|positions| positions.iter().map(|p| (p, 0, p)));
};
let mut result = Vec::new();
for (word, _) in words.as_ref() {
let positions = match dwpcache.entry(word.to_string()) {
Entry::Occupied(entry) => entry.into_mut(),
Entry::Vacant(entry) => {
let positions = ctx.docid_word_positions(docid, word)?;
entry.insert(positions)
}
};
if let Some(positions) = positions {
let iter = positions.iter().map(|p| (p, 0, p));
result.extend(iter); result.extend(iter);
} }
} }
@ -527,18 +527,34 @@ fn resolve_plane_sweep_candidates(
Ok(result) Ok(result)
} }
let mut word_positions_cache = HashMap::new(); fn word_derivations<'a>(
word: &str,
is_prefix: bool,
max_typo: u8,
words_positions: &'a HashMap<String, RoaringBitmap>,
) -> impl Iterator<Item = &'a RoaringBitmap>
{
let dfa = build_dfa(word, max_typo, is_prefix);
words_positions.iter().filter_map(move |(document_word, positions)| {
use levenshtein_automata::Distance;
match dfa.eval(document_word) {
Distance::Exact(_) => Some(positions),
Distance::AtLeast(_) => None,
}
})
}
let mut resolve_operation_cache = HashMap::new(); let mut resolve_operation_cache = HashMap::new();
let mut candidates = BTreeMap::new(); let mut candidates = BTreeMap::new();
for docid in allowed_candidates { for docid in allowed_candidates {
word_positions_cache.clear(); let words_positions = ctx.docid_words_positions(docid)?;
resolve_operation_cache.clear(); resolve_operation_cache.clear();
let positions = resolve_operation( let positions = resolve_operation(
ctx, ctx,
query_tree, query_tree,
docid, docid,
&mut resolve_operation_cache, &mut resolve_operation_cache,
&mut word_positions_cache, &words_positions,
wdcache, wdcache,
)?; )?;
let best_proximity = positions.into_iter().min_by_key(|(_, proximity, _)| *proximity); let best_proximity = positions.into_iter().min_by_key(|(_, proximity, _)| *proximity);

57
milli/src/search/criteria/typo.rs
View File

@ -16,7 +16,6 @@ pub struct Typo<'t> {
bucket_candidates: RoaringBitmap, bucket_candidates: RoaringBitmap,
parent: Option<Box<dyn Criterion + 't>>, parent: Option<Box<dyn Criterion + 't>>,
candidates_cache: HashMap<(Operation, u8), RoaringBitmap>, candidates_cache: HashMap<(Operation, u8), RoaringBitmap>,
typo_cache: HashMap<(String, bool, u8), Vec<(String, u8)>>,
} }
impl<'t> Typo<'t> { impl<'t> Typo<'t> {
@ -34,7 +33,6 @@ impl<'t> Typo<'t> {
bucket_candidates: RoaringBitmap::new(), bucket_candidates: RoaringBitmap::new(),
parent: None, parent: None,
candidates_cache: HashMap::new(), candidates_cache: HashMap::new(),
typo_cache: HashMap::new(),
} }
} }
@ -47,7 +45,6 @@ impl<'t> Typo<'t> {
bucket_candidates: RoaringBitmap::new(), bucket_candidates: RoaringBitmap::new(),
parent: Some(parent), parent: Some(parent),
candidates_cache: HashMap::new(), candidates_cache: HashMap::new(),
typo_cache: HashMap::new(),
} }
} }
} }
@ -63,7 +60,7 @@ impl<'t> Criterion for Typo<'t> {
(_, Allowed(candidates)) if candidates.is_empty() => { (_, Allowed(candidates)) if candidates.is_empty() => {
return Ok(Some(CriterionResult { return Ok(Some(CriterionResult {
query_tree: self.query_tree.take().map(|(_, qt)| qt), query_tree: self.query_tree.take().map(|(_, qt)| qt),
candidates: take(&mut self.candidates).into_inner(), candidates: Some(take(&mut self.candidates).into_inner()),
bucket_candidates: take(&mut self.bucket_candidates), bucket_candidates: take(&mut self.bucket_candidates),
})); }));
}, },
@ -74,9 +71,9 @@ impl<'t> Criterion for Typo<'t> {
} else { } else {
let fst = self.ctx.words_fst(); let fst = self.ctx.words_fst();
let new_query_tree = if self.number_typos < 2 { let new_query_tree = if self.number_typos < 2 {
alterate_query_tree(&fst, query_tree.clone(), self.number_typos, &mut self.typo_cache, wdcache)? alterate_query_tree(&fst, query_tree.clone(), self.number_typos, wdcache)?
} else if self.number_typos == 2 { } else if self.number_typos == 2 {
*query_tree = alterate_query_tree(&fst, query_tree.clone(), self.number_typos, &mut self.typo_cache, wdcache)?; *query_tree = alterate_query_tree(&fst, query_tree.clone(), self.number_typos, wdcache)?;
query_tree.clone() query_tree.clone()
} else { } else {
query_tree.clone() query_tree.clone()
@ -100,7 +97,7 @@ impl<'t> Criterion for Typo<'t> {
return Ok(Some(CriterionResult { return Ok(Some(CriterionResult {
query_tree: Some(new_query_tree), query_tree: Some(new_query_tree),
candidates: new_candidates, candidates: Some(new_candidates),
bucket_candidates, bucket_candidates,
})); }));
} }
@ -112,9 +109,9 @@ impl<'t> Criterion for Typo<'t> {
} else { } else {
let fst = self.ctx.words_fst(); let fst = self.ctx.words_fst();
let new_query_tree = if self.number_typos < 2 { let new_query_tree = if self.number_typos < 2 {
alterate_query_tree(&fst, query_tree.clone(), self.number_typos, &mut self.typo_cache, wdcache)? alterate_query_tree(&fst, query_tree.clone(), self.number_typos, wdcache)?
} else if self.number_typos == 2 { } else if self.number_typos == 2 {
*query_tree = alterate_query_tree(&fst, query_tree.clone(), self.number_typos, &mut self.typo_cache, wdcache)?; *query_tree = alterate_query_tree(&fst, query_tree.clone(), self.number_typos, wdcache)?;
query_tree.clone() query_tree.clone()
} else { } else {
query_tree.clone() query_tree.clone()
@ -130,16 +127,12 @@ impl<'t> Criterion for Typo<'t> {
new_candidates.difference_with(&candidates); new_candidates.difference_with(&candidates);
candidates.union_with(&new_candidates); candidates.union_with(&new_candidates);
self.number_typos += 1; self.number_typos += 1;
self.bucket_candidates.union_with(&new_candidates);
let bucket_candidates = match self.parent {
Some(_) => take(&mut self.bucket_candidates),
None => new_candidates.clone(),
};
return Ok(Some(CriterionResult { return Ok(Some(CriterionResult {
query_tree: Some(new_query_tree), query_tree: Some(new_query_tree),
candidates: new_candidates, candidates: Some(new_candidates),
bucket_candidates, bucket_candidates: take(&mut self.bucket_candidates),
})); }));
} }
}, },
@ -147,7 +140,7 @@ impl<'t> Criterion for Typo<'t> {
let candidates = take(&mut self.candidates).into_inner(); let candidates = take(&mut self.candidates).into_inner();
return Ok(Some(CriterionResult { return Ok(Some(CriterionResult {
query_tree: None, query_tree: None,
candidates: candidates.clone(), candidates: Some(candidates.clone()),
bucket_candidates: candidates, bucket_candidates: candidates,
})); }));
}, },
@ -158,7 +151,7 @@ impl<'t> Criterion for Typo<'t> {
Some(CriterionResult { query_tree, candidates, bucket_candidates }) => { Some(CriterionResult { query_tree, candidates, bucket_candidates }) => {
self.query_tree = query_tree.map(|op| (maximum_typo(&op), op)); self.query_tree = query_tree.map(|op| (maximum_typo(&op), op));
self.number_typos = 0; self.number_typos = 0;
self.candidates = Candidates::Allowed(candidates); self.candidates = candidates.map_or_else(Candidates::default, Candidates::Allowed);
self.bucket_candidates.union_with(&bucket_candidates); self.bucket_candidates.union_with(&bucket_candidates);
}, },
None => return Ok(None), None => return Ok(None),
@ -179,7 +172,6 @@ fn alterate_query_tree(
words_fst: &fst::Set<Cow<[u8]>>, words_fst: &fst::Set<Cow<[u8]>>,
mut query_tree: Operation, mut query_tree: Operation,
number_typos: u8, number_typos: u8,
typo_cache: &mut HashMap<(String, bool, u8), Vec<(String, u8)>>,
wdcache: &mut WordDerivationsCache, wdcache: &mut WordDerivationsCache,
) -> anyhow::Result<Operation> ) -> anyhow::Result<Operation>
{ {
@ -187,7 +179,6 @@ fn alterate_query_tree(
words_fst: &fst::Set<Cow<[u8]>>, words_fst: &fst::Set<Cow<[u8]>>,
operation: &mut Operation, operation: &mut Operation,
number_typos: u8, number_typos: u8,
typo_cache: &mut HashMap<(String, bool, u8), Vec<(String, u8)>>,
wdcache: &mut WordDerivationsCache, wdcache: &mut WordDerivationsCache,
) -> anyhow::Result<()> ) -> anyhow::Result<()>
{ {
@ -195,7 +186,7 @@ fn alterate_query_tree(
match operation { match operation {
And(ops) | Consecutive(ops) | Or(_, ops) => { And(ops) | Consecutive(ops) | Or(_, ops) => {
ops.iter_mut().try_for_each(|op| recurse(words_fst, op, number_typos, typo_cache, wdcache)) ops.iter_mut().try_for_each(|op| recurse(words_fst, op, number_typos, wdcache))
}, },
Operation::Query(q) => { Operation::Query(q) => {
// TODO may be optimized when number_typos == 0 // TODO may be optimized when number_typos == 0
@ -209,19 +200,11 @@ fn alterate_query_tree(
}); });
} else { } else {
let typo = *typo.min(&number_typos); let typo = *typo.min(&number_typos);
let cache_key = (word.clone(), q.prefix, typo); let words = word_derivations(word, q.prefix, typo, words_fst, wdcache)?;
let words = if let Some(derivations) = typo_cache.get(&cache_key) {
derivations.clone()
} else {
let derivations = word_derivations(word, q.prefix, typo, words_fst, wdcache)?.to_vec();
typo_cache.insert(cache_key, derivations.clone());
derivations
};
let queries = words.into_iter().map(|(word, typo)| { let queries = words.into_iter().map(|(word, typo)| {
Operation::Query(Query { Operation::Query(Query {
prefix: false, prefix: false,
kind: QueryKind::Exact { original_typo: typo, word }, kind: QueryKind::Exact { original_typo: *typo, word: word.to_string() },
}) })
}).collect(); }).collect();
@ -234,7 +217,7 @@ fn alterate_query_tree(
} }
} }
recurse(words_fst, &mut query_tree, number_typos, typo_cache, wdcache)?; recurse(words_fst, &mut query_tree, number_typos, wdcache)?;
Ok(query_tree) Ok(query_tree)
} }
@ -394,7 +377,7 @@ mod test {
Operation::Query(Query { prefix: false, kind: QueryKind::exact("world".to_string()) }), Operation::Query(Query { prefix: false, kind: QueryKind::exact("world".to_string()) }),
]), ]),
])), ])),
candidates: candidates_1.clone(), candidates: Some(candidates_1.clone()),
bucket_candidates: candidates_1, bucket_candidates: candidates_1,
}; };
@ -416,7 +399,7 @@ mod test {
]), ]),
]), ]),
])), ])),
candidates: candidates_2.clone(), candidates: Some(candidates_2.clone()),
bucket_candidates: candidates_2, bucket_candidates: candidates_2,
}; };
@ -434,7 +417,7 @@ mod test {
let expected = CriterionResult { let expected = CriterionResult {
query_tree: None, query_tree: None,
candidates: facet_candidates.clone(), candidates: Some(facet_candidates.clone()),
bucket_candidates: facet_candidates, bucket_candidates: facet_candidates,
}; };
@ -472,7 +455,7 @@ mod test {
Operation::Query(Query { prefix: false, kind: QueryKind::exact("world".to_string()) }), Operation::Query(Query { prefix: false, kind: QueryKind::exact("world".to_string()) }),
]), ]),
])), ])),
candidates: &candidates_1 & &facet_candidates, candidates: Some(&candidates_1 & &facet_candidates),
bucket_candidates: candidates_1 & &facet_candidates, bucket_candidates: candidates_1 & &facet_candidates,
}; };
@ -494,7 +477,7 @@ mod test {
]), ]),
]), ]),
])), ])),
candidates: &candidates_2 & &facet_candidates, candidates: Some(&candidates_2 & &facet_candidates),
bucket_candidates: candidates_2 & &facet_candidates, bucket_candidates: candidates_2 & &facet_candidates,
}; };

37
milli/src/search/criteria/words.rs
View File

@ -6,12 +6,12 @@ use roaring::RoaringBitmap;
use crate::search::query_tree::Operation; use crate::search::query_tree::Operation;
use crate::search::WordDerivationsCache; use crate::search::WordDerivationsCache;
use super::{resolve_query_tree, Candidates, Criterion, CriterionResult, Context}; use super::{resolve_query_tree, Criterion, CriterionResult, Context};
pub struct Words<'t> { pub struct Words<'t> {
ctx: &'t dyn Context, ctx: &'t dyn Context,
query_trees: Vec<Operation>, query_trees: Vec<Operation>,
candidates: Candidates, candidates: Option<RoaringBitmap>,
bucket_candidates: RoaringBitmap, bucket_candidates: RoaringBitmap,
parent: Option<Box<dyn Criterion + 't>>, parent: Option<Box<dyn Criterion + 't>>,
candidates_cache: HashMap<(Operation, u8), RoaringBitmap>, candidates_cache: HashMap<(Operation, u8), RoaringBitmap>,
@ -27,7 +27,7 @@ impl<'t> Words<'t> {
Words { Words {
ctx, ctx,
query_trees: query_tree.map(explode_query_tree).unwrap_or_default(), query_trees: query_tree.map(explode_query_tree).unwrap_or_default(),
candidates: candidates.map_or_else(Candidates::default, Candidates::Allowed), candidates,
bucket_candidates: RoaringBitmap::new(), bucket_candidates: RoaringBitmap::new(),
parent: None, parent: None,
candidates_cache: HashMap::default(), candidates_cache: HashMap::default(),
@ -38,7 +38,7 @@ impl<'t> Words<'t> {
Words { Words {
ctx, ctx,
query_trees: Vec::default(), query_trees: Vec::default(),
candidates: Candidates::default(), candidates: None,
bucket_candidates: RoaringBitmap::new(), bucket_candidates: RoaringBitmap::new(),
parent: Some(parent), parent: Some(parent),
candidates_cache: HashMap::default(), candidates_cache: HashMap::default(),
@ -49,20 +49,19 @@ impl<'t> Words<'t> {
impl<'t> Criterion for Words<'t> { impl<'t> Criterion for Words<'t> {
#[logging_timer::time("Words::{}")] #[logging_timer::time("Words::{}")]
fn next(&mut self, wdcache: &mut WordDerivationsCache) -> anyhow::Result<Option<CriterionResult>> { fn next(&mut self, wdcache: &mut WordDerivationsCache) -> anyhow::Result<Option<CriterionResult>> {
use Candidates::{Allowed, Forbidden};
loop { loop {
debug!("Words at iteration {} ({:?})", self.query_trees.len(), self.candidates); debug!("Words at iteration {} ({:?})", self.query_trees.len(), self.candidates);
match (self.query_trees.pop(), &mut self.candidates) { match (self.query_trees.pop(), &mut self.candidates) {
(query_tree, Allowed(candidates)) if candidates.is_empty() => { (query_tree, Some(candidates)) if candidates.is_empty() => {
self.query_trees = Vec::new(); self.query_trees = Vec::new();
return Ok(Some(CriterionResult { return Ok(Some(CriterionResult {
query_tree, query_tree,
candidates: take(&mut self.candidates).into_inner(), candidates: self.candidates.take(),
bucket_candidates: take(&mut self.bucket_candidates), bucket_candidates: take(&mut self.bucket_candidates),
})); }));
}, },
(Some(qt), Allowed(candidates)) => { (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, wdcache)?;
found_candidates.intersect_with(&candidates); found_candidates.intersect_with(&candidates);
candidates.difference_with(&found_candidates); candidates.difference_with(&found_candidates);
@ -74,41 +73,37 @@ impl<'t> Criterion for Words<'t> {
return Ok(Some(CriterionResult { return Ok(Some(CriterionResult {
query_tree: Some(qt), query_tree: Some(qt),
candidates: found_candidates, candidates: Some(found_candidates),
bucket_candidates, bucket_candidates,
})); }));
}, },
(Some(qt), Forbidden(candidates)) => { (Some(qt), None) => {
let mut found_candidates = resolve_query_tree(self.ctx, &qt, &mut self.candidates_cache, wdcache)?;
found_candidates.difference_with(&candidates);
candidates.union_with(&found_candidates);
let bucket_candidates = match self.parent { let bucket_candidates = match self.parent {
Some(_) => take(&mut self.bucket_candidates), Some(_) => take(&mut self.bucket_candidates),
None => found_candidates.clone(), None => RoaringBitmap::new(),
}; };
return Ok(Some(CriterionResult { return Ok(Some(CriterionResult {
query_tree: Some(qt), query_tree: Some(qt),
candidates: found_candidates, candidates: None,
bucket_candidates, bucket_candidates,
})); }));
}, },
(None, Allowed(_)) => { (None, Some(_)) => {
let candidates = take(&mut self.candidates).into_inner(); let candidates = self.candidates.take();
return Ok(Some(CriterionResult { return Ok(Some(CriterionResult {
query_tree: None, query_tree: None,
candidates: candidates.clone(), candidates: candidates.clone(),
bucket_candidates: candidates, bucket_candidates: candidates.unwrap_or_default(),
})); }));
}, },
(None, Forbidden(_)) => { (None, None) => {
match self.parent.as_mut() { match self.parent.as_mut() {
Some(parent) => { Some(parent) => {
match parent.next(wdcache)? { match parent.next(wdcache)? {
Some(CriterionResult { query_tree, candidates, bucket_candidates }) => { Some(CriterionResult { query_tree, candidates, bucket_candidates }) => {
self.query_trees = query_tree.map(explode_query_tree).unwrap_or_default(); self.query_trees = query_tree.map(explode_query_tree).unwrap_or_default();
self.candidates = Candidates::Allowed(candidates); self.candidates = candidates;
self.bucket_candidates.union_with(&bucket_candidates); self.bucket_candidates.union_with(&bucket_candidates);
}, },
None => return Ok(None), None => return Ok(None),

45
milli/src/search/mod.rs
View File

@ -11,7 +11,7 @@ use meilisearch_tokenizer::{AnalyzerConfig, Analyzer};
use once_cell::sync::Lazy; use once_cell::sync::Lazy;
use roaring::bitmap::RoaringBitmap; use roaring::bitmap::RoaringBitmap;
use crate::search::criteria::{Criterion, CriterionResult}; use crate::search::criteria::fetcher::FetcherResult;
use crate::{Index, DocumentId}; use crate::{Index, DocumentId};
pub use self::facet::FacetIter; pub use self::facet::FacetIter;
@ -33,13 +33,24 @@ pub struct Search<'a> {
facet_condition: Option<FacetCondition>, facet_condition: Option<FacetCondition>,
offset: usize, offset: usize,
limit: usize, limit: usize,
optional_words: bool,
authorize_typos: bool,
rtxn: &'a heed::RoTxn<'a>, rtxn: &'a heed::RoTxn<'a>,
index: &'a Index, index: &'a Index,
} }
impl<'a> Search<'a> { impl<'a> Search<'a> {
pub fn new(rtxn: &'a heed::RoTxn, index: &'a Index) -> Search<'a> { pub fn new(rtxn: &'a heed::RoTxn, index: &'a Index) -> Search<'a> {
Search { query: None, facet_condition: None, offset: 0, limit: 20, rtxn, index } Search {
query: None,
facet_condition: None,
offset: 0,
limit: 20,
optional_words: true,
authorize_typos: true,
rtxn,
index,
}
} }
pub fn query(&mut self, query: impl Into<String>) -> &mut Search<'a> { pub fn query(&mut self, query: impl Into<String>) -> &mut Search<'a> {
@ -57,6 +68,16 @@ impl<'a> Search<'a> {
self self
} }
pub fn optional_words(&mut self, value: bool) -> &mut Search<'a> {
self.optional_words = value;
self
}
pub fn authorize_typos(&mut self, value: bool) -> &mut Search<'a> {
self.authorize_typos = value;
self
}
pub fn facet_condition(&mut self, condition: FacetCondition) -> &mut Search<'a> { pub fn facet_condition(&mut self, condition: FacetCondition) -> &mut Search<'a> {
self.facet_condition = Some(condition); self.facet_condition = Some(condition);
self self
@ -67,7 +88,9 @@ impl<'a> Search<'a> {
let before = Instant::now(); let before = Instant::now();
let query_tree = match self.query.as_ref() { let query_tree = match self.query.as_ref() {
Some(query) => { Some(query) => {
let builder = QueryTreeBuilder::new(self.rtxn, self.index); let mut builder = QueryTreeBuilder::new(self.rtxn, self.index);
builder.optional_words(self.optional_words);
builder.authorize_typos(self.authorize_typos);
let stop_words = &Set::default(); let stop_words = &Set::default();
let analyzer = Analyzer::new(AnalyzerConfig::default_with_stopwords(stop_words)); let analyzer = Analyzer::new(AnalyzerConfig::default_with_stopwords(stop_words));
let result = analyzer.analyze(query); let result = analyzer.analyze(query);
@ -99,9 +122,8 @@ impl<'a> Search<'a> {
let mut offset = self.offset; let mut offset = self.offset;
let mut limit = self.limit; let mut limit = self.limit;
let mut documents_ids = Vec::new(); let mut documents_ids = Vec::new();
let mut words_derivations_cache = WordDerivationsCache::new();
let mut initial_candidates = RoaringBitmap::new(); let mut initial_candidates = RoaringBitmap::new();
while let Some(CriterionResult { candidates, bucket_candidates, .. }) = criteria.next(&mut words_derivations_cache)? { while let Some(FetcherResult { candidates, bucket_candidates, .. }) = criteria.next()? {
debug!("Number of candidates found {}", candidates.len()); debug!("Number of candidates found {}", candidates.len());
@ -130,12 +152,23 @@ impl<'a> Search<'a> {
impl fmt::Debug for Search<'_> { impl fmt::Debug for Search<'_> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let Search { query, facet_condition, offset, limit, rtxn: _, index: _ } = self; let Search {
query,
facet_condition,
offset,
limit,
optional_words,
authorize_typos,
rtxn: _,
index: _,
} = self;
f.debug_struct("Search") f.debug_struct("Search")
.field("query", query) .field("query", query)
.field("facet_condition", facet_condition) .field("facet_condition", facet_condition)
.field("offset", offset) .field("offset", offset)
.field("limit", limit) .field("limit", limit)
.field("optional_words", optional_words)
.field("authorize_typos", authorize_typos)
.finish() .finish()
} }
} }