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use prefix cache in criteria

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2021-02-17 15:49:44 +01:00
committed by Kerollmops
parent 98e69e63d2
commit 774a255f2e
1 changed files with 23 additions and 4 deletions
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27
milli/src/search/criteria/mod.rs
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@@ -44,15 +44,15 @@ pub struct HeedContext<'t> {
rtxn: &'t heed::RoTxn<'t>,
index: &'t Index,
words_fst: fst::Set<Cow<'t, [u8]>>,
words_prefixes_fst: fst::Set<Cow<'t, [u8]>>,
}
impl<'a> Context for HeedContext<'a> {
fn query_docids(&self, query: &Query) -> anyhow::Result<Option<RoaringBitmap>> {
match (&query.kind, query.prefix) {
// TODO de-comment when ~ready
// (QueryKind::Exact { word, .. }, true) if in_prefix_cache(&word) => {
// Ok(self.index.prefix_docids.get(self.rtxn, &word)?)
// },
(QueryKind::Exact { word, .. }, true) if self.in_prefix_cache(&word) => {
Ok(self.index.word_prefix_docids.get(self.rtxn, &word)?)
},
(QueryKind::Exact { word, .. }, true) => {
let words = word_typos(&word, true, 0, &self.words_fst)?;
let mut docids = RoaringBitmap::new();
@@ -78,6 +78,19 @@ impl<'a> Context for HeedContext<'a> {
fn query_pair_proximity_docids(&self, left: &Query, right: &Query, distance: u8) -> anyhow::Result<Option<RoaringBitmap>> {
// TODO add prefix cache for Tolerant-Exact-true and Exact-Exact-true
match (&left.kind, &right.kind, right.prefix) {
(QueryKind::Exact { word: left, .. }, QueryKind::Exact { word: right, .. }, true) if self.in_prefix_cache(&right) => {
let key = (left.as_str(), right.as_str(), distance);
Ok(self.index.word_prefix_pair_proximity_docids.get(self.rtxn, &key)?)
},
(QueryKind::Tolerant { typo, word: left }, QueryKind::Exact { word: right, .. }, true) if self.in_prefix_cache(&right) => {
let words = word_typos(&left, false, *typo, &self.words_fst)?;
let mut docids = RoaringBitmap::new();
for (word, _typo) in words {
let key = (word.as_str(), right.as_str(), distance);
docids.union_with(&self.index.word_prefix_pair_proximity_docids.get(self.rtxn, &key)?.unwrap_or_default());
}
Ok(Some(docids))
},
(QueryKind::Exact { word: left, .. }, QueryKind::Exact { word: right, .. }, true) => {
let words = word_typos(&right, true, 0, &self.words_fst)?;
let mut docids = RoaringBitmap::new();
@@ -144,11 +157,17 @@ impl<'a> Context for HeedContext<'a> {
impl<'t> HeedContext<'t> {
pub fn new(rtxn: &'t heed::RoTxn<'t>, index: &'t Index) -> anyhow::Result<Self> {
let words_fst = index.words_fst(rtxn)?;
let words_prefixes_fst = index.words_prefixes_fst(rtxn)?;
Ok(Self {
rtxn,
index,
words_fst,
words_prefixes_fst,
})
}
fn in_prefix_cache(&self, word: &str) -> bool {
self.words_prefixes_fst.contains(word)
}
}