3542: Refactor of the search algorithms r=dureuill a=loiclec
This PR refactors a large part of the search logic (related to https://github.com/meilisearch/meilisearch/issues/3547)
- The "query tree" is replaced by a "query graph", which describes the different ways in which the search query can be interpreted and precomputes the word derivations for each query term. Example:
<img width="1162" alt="Screenshot 2023-02-27 at 10 26 50" src="https://user-images.githubusercontent.com/6040237/221525270-87917cc0-60d1-473f-847f-2c5a7de9e370.png">
- The control flow between the ~criterions~ ranking rules is managed in a single place instead of being independently implemented by each ranking rule.
- The set of document candidates is determined greedily from the beginning. It is often referred as the "universe" in the code.
- The ranking rules `proximity`, `attribute`, `typo`, and (maybe) `exactness` are or will be implemented using a K-shortest path graph algorithm. This minimises the number of database and bitmap operations we need to do to compute each ranking rule bucket. It also simplifies the code a lot since a lot of ranking rules will share a large part of their implementation.
- Pointers to database values are stored in a cache to avoid searching in the LMDB databases needlessly.
- The result of some roaring bitmap operations are also stored in a cache, although we'll need to measure the memory pressure this puts on the system and maybe deactivate this cache later on.
- Search requests can be visually logged and debugged in tests.
TODO:
- [ ] Reintroduce search benchmarks
- [x] Implement `disableOnWords` and `disableOnAttributes` settings of typo tolerance
- [x] Implement "exhaustive number of hits
- [x] Implement `attribute` ranking rule
- [x] Indexing changes: split into `word_fid_docids` and `word_position_docids` (with bucketed position)
- [x] Ranking rule implementations
- [ ] Implement `exactness` ranking rule
- [x] Initial implementation
- [ ] Correct implementation when followed by `Words`
- [ ] Implement `geosort` ranking rule
- [ ] Add tests
- [x] Typo tolerance `disableOnWords`/`disableOnAttributes`
- [ ] Geosort
- [x] Exactness
- [ ] Attribute/Position
- [ ] Interactions between ranking rules:
- [x] Typo/Proximity/Attribute not preceded by Words
- [x] Exactness not preceded by Words
- [x] Exactness -> Words (+ check universe correctness)
- [x] Exactness -> Typo, etc.
- [ ] Sort -> Words (performance tests)
- [ ] Attribute/Position -> Typo
- [ ] Attribute/Position -> Proximity
- [x] Typo -> Exactness
- [x] Typo -> Proximity
- [x] Proximity -> Typo
- [x] Words
- [x] Typo
- [x] Proximity
- [x] Sort
- [x] Ngrams
- [x] Split words
- [x] Ngram + Split Words
- [x] Term matching strategy
- [x] Distinct attribute
- [x] Phrase Search
- [x] Placeholder search
- [x] Highlighter
- [x] Limit the number of word derivations in a search query
- [x] Compute the initial universe correctly according to the terms matching strategy
- [x] Implement placeholder search
- [x] Get the list of ranking rules from the settings
- [x] Implement `distinct`
- [x] Determine what to do when one of `attribute`, `proximity`, `typo`, or `exactness` is placed before `words`
- [x] Make sure the correct number of allowed typos is used for each word, including the prefix one
- [x] Make sure stop words are treated correctly (e.g. correct position in query graph), including in phrases
- [x] Support phrases correctly
- [x] Support synonyms
- [x] Support split words
- [x] Support combination of ngram + split-words (e.g. `whiteh orse` -> `"white horse"`)
- [x] Implement `typo` ranking rule
- [x] Implement `sort` ranking rule
- [x] Use existing `Search` interface to use the new search algorithms
- [x] Remove old code
Co-authored-by: Loïc Lecrenier <loic.lecrenier@me.com>
Conflicts | resolution
----------|-----------
Cargo.lock | added mimalloc
Cargo.toml | took origin/main version
milli/src/search/criteria/exactness.rs | deleted after checking it was only clippy changes
milli/src/search/query_tree.rs | deleted after checking it was only clippy changes
3702: Update charabia v0.7.2 r=curquiza a=ManyTheFish
fixes#3701fixes#3689fixes#3285
3710: Updated messages pointing to the docs website r=curquiza a=roy9495
# Pull Request
Fixes partially #3668
## What does this PR do?
- ...Any messages referencing this docs site https://docs.meilisearch.com has been changed to this docs site https://meilisearch.com/docs .
Thanks.
## PR checklist
Please check if your PR fulfills the following requirements:
- [x] Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
- [x] Have you read the contributing guidelines?
- [x] Have you made sure that the title is accurate and descriptive of the changes?
Thank you so much for contributing to Meilisearch!
Co-authored-by: ManyTheFish <many@meilisearch.com>
Co-authored-by: TATHAGATA ROY <98920199+roy9495@users.noreply.github.com>
3718: Fix broken README links r=curquiza a=Kerollmops
This PR fixes#3708 by changing the link to the new SDKs and API Reference pages. I would like to thank `@Tommy-42,` who also found the issue.
Co-authored-by: Clément Renault <clement@meilisearch.com>
3709: Add SDKs test in a CI r=Kerollmops a=curquiza
Add a CI running every week to run the `nightly` docker image of Meilisearch with the most "strategic" SDKs (most used, well tested, strongly typed SDK)
- meilisearch-js
- instant-meilisearch
- meilisearch-php
- meilisearch-python
- meilisearch-go
- meilisearch-ruby
- meilisearch-rust
Co-authored-by: Clémentine Urquizar <clementine@meilisearch.com>
