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Make the Typo and Words work with synonyms

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This commit is contained in:
Clément Renault 2019-12-06 13:41:22 +01:00
parent f87c67fcad
commit 4e91b31b1f
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GPG Key ID: 0151CDAB43460DAE
3 changed files with 76 additions and 80 deletions
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2
meilisearch-core/src/automaton/query_enhancer.rs
View File

@ -188,7 +188,7 @@ fn replacement(
let n = real - range.start;
let start = origins[origin];
let end = origins[new_origin + 1];
let end = origins.get(new_origin + 1)?;
let remaining = (end - start) - n;
Some(Range {

72
meilisearch-core/src/bucket_sort.rs
View File

@ -56,7 +56,11 @@ pub fn bucket_sort<'c>(
let before_raw_documents_building = Instant::now();
let mut raw_documents = Vec::new();
for raw_matches in bare_matches.linear_group_by_key_mut(|sm| sm.document_id) {
raw_documents.push(RawDocument { raw_matches, processed_matches: None });
raw_documents.push(RawDocument {
raw_matches,
processed_matches: Vec::new(),
processed_distances: Vec::new(),
});
}
debug!("creating {} candidates documents took {:.02?}",
raw_documents.len(),
@ -134,7 +138,10 @@ pub fn bucket_sort<'c>(
pub struct RawDocument<'a, 'tag> {
pub raw_matches: &'a mut [BareMatch<'tag>],
pub processed_matches: Option<Vec<SimpleMatch>>,
pub processed_matches: Vec<SimpleMatch>,
/// The list of minimum `distance` found
/// where the `query_index` is the index
pub processed_distances: Vec<Option<u8>>,
}
pub struct BareMatch<'tag> {
@ -226,7 +233,7 @@ fn fetch_matches<'txn, 'tag>(
for (query_index, automaton) in automatons.iter().enumerate() {
let before_dfa = Instant::now();
let dfa = automaton.dfa();
let QueryWordAutomaton { index, query, is_exact, is_prefix } = automaton;
let QueryWordAutomaton { query, is_exact, is_prefix } = automaton;
dfa_time += before_dfa.elapsed();
let mut number_of_words = 0;
@ -287,7 +294,6 @@ fn fetch_matches<'txn, 'tag>(
#[derive(Debug)]
pub struct QueryWordAutomaton {
index: usize,
query: String,
/// Is it a word that must be considered exact
/// or is it some derived word (i.e. a synonym)
@ -296,16 +302,16 @@ pub struct QueryWordAutomaton {
}
impl QueryWordAutomaton {
pub fn exact(query: &str, index: usize) -> QueryWordAutomaton {
QueryWordAutomaton { index, query: query.to_string(), is_exact: true, is_prefix: false }
pub fn exact(query: &str) -> QueryWordAutomaton {
QueryWordAutomaton { query: query.to_string(), is_exact: true, is_prefix: false }
}
pub fn exact_prefix(query: &str, index: usize) -> QueryWordAutomaton {
QueryWordAutomaton { index, query: query.to_string(), is_exact: true, is_prefix: true }
pub fn exact_prefix(query: &str) -> QueryWordAutomaton {
QueryWordAutomaton { query: query.to_string(), is_exact: true, is_prefix: true }
}
pub fn non_exact(query: &str, index: usize) -> QueryWordAutomaton {
QueryWordAutomaton { index, query: query.to_string(), is_exact: false, is_prefix: false }
pub fn non_exact(query: &str) -> QueryWordAutomaton {
QueryWordAutomaton { query: query.to_string(), is_exact: false, is_prefix: false }
}
pub fn dfa(&self) -> DFA {
@ -317,27 +323,6 @@ impl QueryWordAutomaton {
}
}
// fn construct_automatons(query: &str) -> Vec<QueryWordAutomaton> {
// let has_end_whitespace = query.chars().last().map_or(false, char::is_whitespace);
// let mut original_words = split_query_string(query).map(str::to_lowercase).peekable();
// let mut automatons = Vec::new();
// while let Some(word) = original_words.next() {
// let has_following_word = original_words.peek().is_some();
// let not_prefix_dfa = has_following_word || has_end_whitespace || word.chars().all(is_cjk);
// let automaton = if not_prefix_dfa {
// QueryWordAutomaton::exact(word)
// } else {
// QueryWordAutomaton::exact_prefix(word)
// };
// automatons.push(automaton);
// }
// automatons
// }
fn construct_automatons2(
reader: &heed::RoTxn<MainT>,
query: &str,
@ -364,9 +349,9 @@ fn construct_automatons2(
let not_prefix_dfa = has_following_word || has_end_whitespace || word.chars().all(is_cjk);
let automaton = if not_prefix_dfa {
QueryWordAutomaton::exact(word, automaton_index)
QueryWordAutomaton::exact(word)
} else {
QueryWordAutomaton::exact_prefix(word, automaton_index)
QueryWordAutomaton::exact_prefix(word)
};
automaton_index += 1;
automatons.push(automaton);
@ -413,9 +398,9 @@ fn construct_automatons2(
for synonym in synonyms_words {
let automaton = if nb_synonym_words == 1 {
QueryWordAutomaton::exact(synonym, automaton_index)
QueryWordAutomaton::exact(synonym)
} else {
QueryWordAutomaton::non_exact(synonym, automaton_index)
QueryWordAutomaton::non_exact(synonym)
};
automaton_index += 1;
automatons.push(automaton);
@ -426,12 +411,12 @@ fn construct_automatons2(
if n == 1 {
if let Some((left, right)) = split_best_frequency(reader, &normalized, postings_lists_store)? {
let left_automaton = QueryWordAutomaton::exact(left, automaton_index);
let left_automaton = QueryWordAutomaton::exact(left);
enhancer_builder.declare(query_range.clone(), automaton_index, &[left]);
automaton_index += 1;
automatons.push(left_automaton);
let right_automaton = QueryWordAutomaton::exact(right, automaton_index);
let right_automaton = QueryWordAutomaton::exact(right);
enhancer_builder.declare(query_range.clone(), automaton_index, &[right]);
automaton_index += 1;
automatons.push(right_automaton);
@ -445,23 +430,12 @@ fn construct_automatons2(
let real_query_index = automaton_index;
enhancer_builder.declare(query_range.clone(), real_query_index, &[&normalized]);
let automaton = QueryWordAutomaton::exact(&normalized, automaton_index);
let automaton = QueryWordAutomaton::exact(&normalized);
automaton_index += 1;
automatons.push(automaton);
}
}
}
// // order automatons, the most important first,
// // we keep the original automatons at the front.
// automatons[1..].sort_by_key(|group| {
// let a = group.automatons.first().unwrap();
// (
// Reverse(a.is_exact),
// a.ngram,
// Reverse(group.automatons.len()),
// )
// });
Ok((automatons, enhancer_builder.build()))
}

82
meilisearch-core/src/criterion2.rs
View File

@ -41,6 +41,32 @@ pub trait Criterion {
}
}
fn prepare_query_distances(
documents: &mut [RawDocument],
query_enhancer: &QueryEnhancer,
) {
for document in documents {
if !document.processed_distances.is_empty() { continue }
let mut processed = Vec::new();
for m in document.raw_matches.iter() {
let range = query_enhancer.replacement(m.query_index as u32);
processed.resize(range.end as usize, None);
for index in range {
let index = index as usize;
processed[index] = match processed[index] {
Some(distance) if distance > m.distance => Some(m.distance),
Some(distance) => Some(distance),
None => Some(m.distance),
};
}
}
document.processed_distances = processed;
}
}
pub struct Typo;
impl Criterion for Typo {
@ -52,9 +78,7 @@ impl Criterion for Typo {
postings_lists: &mut PostingsListsArena,
query_enhancer: &QueryEnhancer,
) {
for document in documents {
document.raw_matches.sort_unstable_by_key(|bm| (bm.query_index, bm.distance));
}
prepare_query_distances(documents, query_enhancer);
}
fn evaluate(
@ -79,20 +103,22 @@ impl Criterion for Typo {
}
#[inline]
fn compute_typos(matches: &[BareMatch]) -> usize {
fn compute_typos(distances: &[Option<u8>]) -> usize {
let mut number_words: usize = 0;
let mut sum_typos = 0.0;
for group in matches.linear_group_by_key(|bm| bm.query_index) {
sum_typos += custom_log10(group[0].distance);
number_words += 1;
for distance in distances {
if let Some(distance) = distance {
sum_typos += custom_log10(*distance);
number_words += 1;
}
}
(number_words as f32 / (sum_typos + 1.0) * 1000.0) as usize
}
let lhs = compute_typos(&lhs.raw_matches);
let rhs = compute_typos(&rhs.raw_matches);
let lhs = compute_typos(&lhs.processed_distances);
let rhs = compute_typos(&rhs.processed_distances);
lhs.cmp(&rhs).reverse()
}
@ -109,9 +135,7 @@ impl Criterion for Words {
postings_lists: &mut PostingsListsArena,
query_enhancer: &QueryEnhancer,
) {
for document in documents {
document.raw_matches.sort_unstable_by_key(|bm| bm.query_index);
}
prepare_query_distances(documents, query_enhancer);
}
fn evaluate(
@ -122,28 +146,26 @@ impl Criterion for Words {
) -> Ordering
{
#[inline]
fn number_of_query_words(matches: &[BareMatch]) -> usize {
matches.linear_group_by_key(|bm| bm.query_index).count()
fn number_of_query_words(distances: &[Option<u8>]) -> usize {
distances.iter().cloned().filter(Option::is_some).count()
}
let lhs = number_of_query_words(&lhs.raw_matches);
let rhs = number_of_query_words(&rhs.raw_matches);
let lhs = number_of_query_words(&lhs.processed_distances);
let rhs = number_of_query_words(&rhs.processed_distances);
lhs.cmp(&rhs).reverse()
}
}
fn process_raw_matches<'a, 'tag, 'txn>(
fn prepare_raw_matches<'a, 'tag, 'txn>(
documents: &mut [RawDocument<'a, 'tag>],
postings_lists: &mut PostingsListsArena<'tag, 'txn>,
query_enhancer: &QueryEnhancer,
) {
for document in documents {
if document.processed_matches.is_some() { continue }
if !document.processed_matches.is_empty() { continue }
let mut processed = Vec::new();
let document_id = document.raw_matches[0].document_id;
for m in document.raw_matches.iter() {
let postings_list = &postings_lists[m.postings_list];
processed.reserve(postings_list.len());
@ -160,7 +182,7 @@ fn process_raw_matches<'a, 'tag, 'txn>(
}
let processed = multiword_rewrite_matches(&mut processed, query_enhancer);
document.processed_matches = Some(processed.into_vec());
document.processed_matches = processed.into_vec();
}
}
@ -175,7 +197,7 @@ impl Criterion for Proximity {
postings_lists: &mut PostingsListsArena<'tag, 'txn>,
query_enhancer: &QueryEnhancer,
) {
process_raw_matches(documents, postings_lists, query_enhancer);
prepare_raw_matches(documents, postings_lists, query_enhancer);
}
fn evaluate<'a, 'tag, 'txn>(
@ -225,8 +247,8 @@ impl Criterion for Proximity {
proximity
}
let lhs = matches_proximity(&lhs.processed_matches.as_ref().unwrap());
let rhs = matches_proximity(&rhs.processed_matches.as_ref().unwrap());
let lhs = matches_proximity(&lhs.processed_matches);
let rhs = matches_proximity(&rhs.processed_matches);
lhs.cmp(&rhs)
}
@ -243,7 +265,7 @@ impl Criterion for Attribute {
postings_lists: &mut PostingsListsArena<'tag, 'txn>,
query_enhancer: &QueryEnhancer,
) {
process_raw_matches(documents, postings_lists, query_enhancer);
prepare_raw_matches(documents, postings_lists, query_enhancer);
}
fn evaluate<'a, 'tag, 'txn>(
@ -262,8 +284,8 @@ impl Criterion for Attribute {
sum_attribute
}
let lhs = sum_attribute(&lhs.processed_matches.as_ref().unwrap());
let rhs = sum_attribute(&rhs.processed_matches.as_ref().unwrap());
let lhs = sum_attribute(&lhs.processed_matches);
let rhs = sum_attribute(&rhs.processed_matches);
lhs.cmp(&rhs)
}
@ -280,7 +302,7 @@ impl Criterion for WordsPosition {
postings_lists: &mut PostingsListsArena<'tag, 'txn>,
query_enhancer: &QueryEnhancer,
) {
process_raw_matches(documents, postings_lists, query_enhancer);
prepare_raw_matches(documents, postings_lists, query_enhancer);
}
fn evaluate<'a, 'tag, 'txn>(
@ -299,8 +321,8 @@ impl Criterion for WordsPosition {
sum_words_position
}
let lhs = sum_words_position(&lhs.processed_matches.as_ref().unwrap());
let rhs = sum_words_position(&rhs.processed_matches.as_ref().unwrap());
let lhs = sum_words_position(&lhs.processed_matches);
let rhs = sum_words_position(&rhs.processed_matches);
lhs.cmp(&rhs)
}