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feat: Store all documents words by document rather than by attribute

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This commit is contained in:
Clément Renault 2019-05-13 16:22:36 +02:00
parent aa90f22865
commit 169bd4cb39
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GPG Key ID: 0151CDAB43460DAE
2 changed files with 59 additions and 83 deletions
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118
meilidb-data/src/database.rs
View File

@ -15,7 +15,7 @@ use zerocopy::{AsBytes, LayoutVerified};
use fst::{SetBuilder, set::OpBuilder, Streamer};
use crate::document_attr_key::DocumentAttrKey;
use crate::indexer::{Indexer, Indexed};
use crate::indexer::Indexer;
use crate::serde::extract_document_id;
use crate::serde::{Serializer, RamDocumentStore, Deserializer, SerializerError};
use crate::{Schema, SchemaAttr, RankedMap};
@ -131,10 +131,10 @@ impl Database {
WordsIndex(tree)
};
let attrs_words = {
let tree_name = format!("{}-attrs-words", name);
let docs_words = {
let tree_name = format!("{}-docs-words", name);
let tree = self.inner.open_tree(tree_name)?;
AttrsWords(tree)
DocsWords(tree)
};
let documents = {
@ -143,7 +143,7 @@ impl Database {
DocumentsIndex(tree)
};
let raw_index = RawIndex { main, words, attrs_words, documents };
let raw_index = RawIndex { main, words, docs_words, documents };
let index = Index::from_raw(raw_index)?;
vacant.insert(Arc::new(index)).clone()
@ -180,10 +180,10 @@ impl Database {
WordsIndex(tree)
};
let attrs_words = {
let tree_name = format!("{}-attrs-words", name);
let docs_words = {
let tree_name = format!("{}-docs-words", name);
let tree = self.inner.open_tree(tree_name)?;
AttrsWords(tree)
DocsWords(tree)
};
let documents = {
@ -196,7 +196,7 @@ impl Database {
indexes.insert(name.to_string());
self.set_indexes(&indexes)?;
let raw_index = RawIndex { main, words, attrs_words, documents };
let raw_index = RawIndex { main, words, docs_words, documents };
let index = Index::from_raw(raw_index)?;
vacant.insert(Arc::new(index)).clone()
@ -211,7 +211,7 @@ impl Database {
pub struct RawIndex {
pub main: MainIndex,
pub words: WordsIndex,
pub attrs_words: AttrsWords,
pub docs_words: DocsWords,
pub documents: DocumentsIndex,
}
@ -299,11 +299,11 @@ impl WordsIndex {
}
#[derive(Clone)]
pub struct AttrsWords(Arc<sled::Tree>);
pub struct DocsWords(Arc<sled::Tree>);
impl AttrsWords {
pub fn attr_words(&self, id: DocumentId, attr: SchemaAttr) -> Result<Option<fst::Set>, Error> {
let key = DocumentAttrKey::new(id, attr).to_be_bytes();
impl DocsWords {
pub fn doc_words(&self, id: DocumentId) -> Result<Option<fst::Set>, Error> {
let key = id.0.to_be_bytes();
match self.0.get(key)? {
Some(bytes) => {
let len = bytes.len();
@ -315,54 +315,19 @@ impl AttrsWords {
}
}
pub fn attrs_words(&self, id: DocumentId) -> DocumentAttrsWordsIter {
let start = DocumentAttrKey::new(id, SchemaAttr::min());
let start = start.to_be_bytes();
let end = DocumentAttrKey::new(id, SchemaAttr::max());
let end = end.to_be_bytes();
DocumentAttrsWordsIter(self.0.range(start..=end))
}
pub fn set_attr_words(&self, id: DocumentId, attr: SchemaAttr, words: &fst::Set) -> Result<(), Error> {
let key = DocumentAttrKey::new(id, attr).to_be_bytes();
pub fn set_doc_words(&self, id: DocumentId, words: &fst::Set) -> Result<(), Error> {
let key = id.0.to_be_bytes();
self.0.set(key, words.as_fst().as_bytes())?;
Ok(())
}
pub fn del_attr_words(&self, id: DocumentId, attr: SchemaAttr) -> Result<(), Error> {
let key = DocumentAttrKey::new(id, attr).to_be_bytes();
pub fn del_doc_words(&self, id: DocumentId) -> Result<(), Error> {
let key = id.0.to_be_bytes();
self.0.del(key)?;
Ok(())
}
}
pub struct DocumentAttrsWordsIter<'a>(sled::Iter<'a>);
impl<'a> Iterator for DocumentAttrsWordsIter<'a> {
type Item = sled::Result<(SchemaAttr, fst::Set)>;
fn next(&mut self) -> Option<Self::Item> {
match self.0.next() {
Some(Ok((key, bytes))) => {
let slice: &[u8] = key.as_ref();
let array = slice.try_into().unwrap();
let key = DocumentAttrKey::from_be_bytes(array);
let len = bytes.len();
let value = bytes.into();
let fst = fst::raw::Fst::from_shared_bytes(value, 0, len).unwrap();
let set = fst::Set::from(fst);
Some(Ok((key.attribute, set)))
},
Some(Err(e)) => Some(Err(e.into())),
None => None,
}
}
}
#[derive(Clone)]
pub struct DocumentsIndex(Arc<sled::Tree>);
@ -384,6 +349,18 @@ impl DocumentsIndex {
Ok(())
}
pub fn del_all_document_fields(&self, id: DocumentId) -> sled::Result<()> {
let start = DocumentAttrKey::new(id, SchemaAttr::min()).to_be_bytes();
let end = DocumentAttrKey::new(id, SchemaAttr::max()).to_be_bytes();
let document_attrs = self.0.range(start..=end).keys();
for key in document_attrs {
self.0.del(key?)?;
}
Ok(())
}
pub fn document_fields(&self, id: DocumentId) -> DocumentFieldsIter {
let start = DocumentAttrKey::new(id, SchemaAttr::min());
let start = start.to_be_bytes();
@ -571,7 +548,7 @@ impl<'a> DocumentsAddition<'a> {
let lease_inner = self.inner.lease_inner();
let main = &lease_inner.raw.main;
let words = &lease_inner.raw.words;
let attrs_words = &lease_inner.raw.attrs_words;
let docs_words = &lease_inner.raw.docs_words;
let documents = &lease_inner.raw.documents;
// 1. remove the previous documents match indexes
@ -584,10 +561,10 @@ impl<'a> DocumentsAddition<'a> {
documents.set_document_field(id, attr, value)?;
}
let Indexed { words_doc_indexes, docs_attrs_words } = self.indexer.build();
let indexed = self.indexer.build();
let mut delta_words_builder = SetBuilder::memory();
for (word, delta_set) in words_doc_indexes {
for (word, delta_set) in indexed.words_doc_indexes {
delta_words_builder.insert(&word).unwrap();
let set = match words.doc_indexes(&word)? {
@ -598,8 +575,8 @@ impl<'a> DocumentsAddition<'a> {
words.set_doc_indexes(&word, &set)?;
}
for ((id, attr), words) in docs_attrs_words {
attrs_words.set_attr_words(id, attr, &words)?;
for (id, words) in indexed.docs_words {
docs_words.set_doc_words(id, &words)?;
}
let delta_words = delta_words_builder
@ -656,7 +633,7 @@ impl<'a> DocumentsDeletion<'a> {
pub fn finalize(mut self) -> Result<(), Error> {
let lease_inner = self.inner.lease_inner();
let main = &lease_inner.raw.main;
let attrs_words = &lease_inner.raw.attrs_words;
let docs_words = &lease_inner.raw.docs_words;
let words = &lease_inner.raw.words;
let documents = &lease_inner.raw.documents;
@ -666,26 +643,25 @@ impl<'a> DocumentsDeletion<'a> {
SetBuf::new_unchecked(self.documents)
};
let mut words_attrs = HashMap::new();
let mut words_document_ids = HashMap::new();
for id in idset.into_vec() {
for result in attrs_words.attrs_words(id) {
let (attr, words) = result?;
if let Some(words) = docs_words.doc_words(id)? {
let mut stream = words.stream();
while let Some(word) = stream.next() {
let word = word.to_vec();
words_attrs.entry(word).or_insert_with(Vec::new).push((id, attr));
words_document_ids.entry(word).or_insert_with(Vec::new).push(id);
}
}
}
let mut removed_words = BTreeSet::new();
for (word, mut attrs) in words_attrs {
attrs.sort_unstable();
attrs.dedup();
let attrs = SetBuf::new_unchecked(attrs);
for (word, mut document_ids) in words_document_ids {
document_ids.sort_unstable();
document_ids.dedup();
let document_ids = SetBuf::new_unchecked(document_ids);
if let Some(doc_indexes) = words.doc_indexes(&word)? {
let op = DifferenceByKey::new(&doc_indexes, &attrs, |d| d.document_id, |(id, _)| *id);
let op = DifferenceByKey::new(&doc_indexes, &document_ids, |d| d.document_id, |id| *id);
let doc_indexes = op.into_set_buf();
if !doc_indexes.is_empty() {
@ -696,9 +672,9 @@ impl<'a> DocumentsDeletion<'a> {
}
}
for (id, attr) in attrs.into_vec() {
documents.del_document_field(id, attr)?;
attrs_words.del_attr_words(id, attr)?;
for id in document_ids.into_vec() {
documents.del_all_document_fields(id)?;
docs_words.del_doc_words(id)?;
}
}

24
meilidb-data/src/indexer.rs
View File

@ -13,12 +13,12 @@ type Word = Vec<u8>; // TODO make it be a SmallVec
pub struct Indexer {
word_limit: usize, // the maximum number of indexed words
words_doc_indexes: BTreeMap<Word, Vec<DocIndex>>,
docs_attrs_words: HashMap<(DocumentId, SchemaAttr), Vec<Word>>,
docs_words: HashMap<DocumentId, Vec<Word>>,
}
pub struct Indexed {
pub words_doc_indexes: BTreeMap<Word, SetBuf<DocIndex>>,
pub docs_attrs_words: HashMap<(DocumentId, SchemaAttr), fst::Set>,
pub docs_words: HashMap<DocumentId, fst::Set>,
}
impl Indexer {
@ -30,7 +30,7 @@ impl Indexer {
Indexer {
word_limit: limit,
words_doc_indexes: BTreeMap::new(),
docs_attrs_words: HashMap::new(),
docs_words: HashMap::new(),
}
}
@ -42,7 +42,7 @@ impl Indexer {
attr,
self.word_limit,
&mut self.words_doc_indexes,
&mut self.docs_attrs_words,
&mut self.docs_words,
);
if !must_continue { break }
@ -60,7 +60,7 @@ impl Indexer {
attr,
self.word_limit,
&mut self.words_doc_indexes,
&mut self.docs_attrs_words,
&mut self.docs_words,
);
if !must_continue { break }
@ -76,16 +76,16 @@ impl Indexer {
(word, SetBuf::new_unchecked(indexes))
}).collect();
let docs_attrs_words = self.docs_attrs_words
let docs_words = self.docs_words
.into_iter()
.map(|((id, attr), mut words)| {
.map(|(id, mut words)| {
words.sort_unstable();
words.dedup();
((id, attr), fst::Set::from_iter(words).unwrap())
(id, fst::Set::from_iter(words).unwrap())
})
.collect();
Indexed { words_doc_indexes, docs_attrs_words }
Indexed { words_doc_indexes, docs_words }
}
}
@ -95,7 +95,7 @@ fn index_token(
attr: SchemaAttr,
word_limit: usize,
words_doc_indexes: &mut BTreeMap<Word, Vec<DocIndex>>,
docs_attrs_words: &mut HashMap<(DocumentId, SchemaAttr), Vec<Word>>,
docs_words: &mut HashMap<DocumentId, Vec<Word>>,
) -> bool
{
if token.word_index >= word_limit { return false }
@ -106,7 +106,7 @@ fn index_token(
Some(docindex) => {
let word = Vec::from(token.word);
words_doc_indexes.entry(word.clone()).or_insert_with(Vec::new).push(docindex);
docs_attrs_words.entry((id, attr)).or_insert_with(Vec::new).push(word);
docs_words.entry(id).or_insert_with(Vec::new).push(word);
},
None => return false,
}
@ -119,7 +119,7 @@ fn index_token(
Some(docindex) => {
let word = Vec::from(token.word);
words_doc_indexes.entry(word.clone()).or_insert_with(Vec::new).push(docindex);
docs_attrs_words.entry((id, attr)).or_insert_with(Vec::new).push(word);
docs_words.entry(id).or_insert_with(Vec::new).push(word);
},
None => return false,
}