Ability to apply lcs to multiple-matches query via API

[scruel]

Proposal:

Currently, lcs can only apply to one match query which contains all keywords, multiple separate matches:

$ mysql -P9306 -se 'select content from pile_test'
content
lurks torture
What
torture
What is

$ curl -X POST 'http://localhost:9308/search' --data '{
    "index": "pile_test",
    "query": {"bool": {"must": [{"bool": {"should": [{"match": {"content": {"query": "lurks"}}}, {"match": {"content": {"query": "torture"}}}]}}]}},
    "options": {
      "ranker": "expr('\''1000 * top(lcs)'\'')"
    }
}' | jq '.hits.hits[] | ._score'
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  1245  100  1002  100   243   439k   106k --:--:-- --:--:-- --:--:--  607k
1000
1000

$ curl -X POST 'http://localhost:9308/search' --data '{
    "index": "pile_test",
    "query": {"bool": {"must": [{"bool": {"should": [{"match": {"content": {"query": "lurks torture", "operator": "or"}}}]}}]}}
,
    "options": {
      "ranker": "expr('\''1000 * top(lcs)'\'')"
    }
}' | jq '.hits.hits[] | ._score'
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  1226  100  1002  100   224   691k   154k --:--:-- --:--:-- --:--:-- 1197k
2000
1000

Checklist:

^{To be completed by the assignee. Check off tasks that have been completed or are not applicable.}

• [ ] Implementation completed
• [ ] Tests developed
• [ ] Documentation updated
• [ ] Documentation reviewed
• [ ] Changelog updated
• [x] OpenAPI YAML updated and issue created to rebuild clients

[sanikolaev]

@scruel do you mean that there should be a way to specify ranker for each entry in the should separately?

[scruel]

@sanikolaev Yeap