不爲也 比不能也

Analyzed string fields are also multivalue fields, but sorting on them seldom gives you the results you want. If you analyze a string like fine old art, it results in three terms. We probably want to sort alphabetically on the first term, then the second term, and so forth, but Elasticsearch doesn’t have this information at its disposal at sort time.analyzed string field 또한 다중 값 field이다. 그러나 그것들..

Of course, the bool query isn’t restricted to combining simple one-word match queries. It can combine any other query, including other bool queries. It is commonly used to fine-tune the relevance _score for each document by combining the scores from several distinct queries.물론, bool query는, 간단한 단일 단어(one-word) match query를 조합하는데 있어, 제한이 없다. 다른 bool query는 물론이고, 다른 어떤 query와도 조합할 수 있다. 여러 별개의 que..

Before we move on to discussing more-complex queries in Multifield Search, let’s make a quick detour to explain why we created our test index with just one primary shard.Multifield Search에서, 더 복잡한 query에 대해 알아보기 전에, 하나의 primary shard만을 가진 test index를 생성한 이유를 설명하겠다.Every now and again a new user opens an issue claiming that sorting by relevance is broken and offering a short reproduction: the use..

As useful as phrase and proximity queries can be, they still have a downside. They are overly strict: all terms must be present for a phrase query to match, even when using slop.phrase와 proximity query는 유용하지만, 단점이 있다. 지나치게 엄격하다. phrase query에 일치하기 위해, 심지어 slop 을 사용할 경우에도, 모든 단어가 반드시 존재해야 한다.The flexibility in word ordering that you gain with slop also comes at a price, because you lose the assoc..

The built-in language analyzers are available globally and don’t need to be configured before being used. They can be specified directly in the field mapping:내장된 language analyzer는 범용적으로 이용할 수 있고, 사용하기 전에 설정할 필요가 없다. field mapping에서 바로 지정할 수 있다.PUT /my_index { "mappings": { "blog": { "properties": { "title": { "type": "string", "analyzer": "english" } } } } }title field는, 기본값인 standard analyzer ..