es 자동완성 도움될만한거 정리하기.

[kgneng2]

highlight

• https://www.elastic.co/guide/en/elasticsearch/reference/current/highlighting.html
• 아쉽게도. 테스트했을때, tokenizer가 whitespace만 동작함.
• https://stackoverflow.com/questions/44205267/how-to-highlight-ngram-tokens-in-a-word-using-elastic-search
• tokenizer가 standard라서 그럼. ngram으로 바꾸면 잘동작할거라함.

[kgneng2]

Query

• _search 시에 _source로 project 같은 효괄 얻을수있음

[kgneng2]

dis max query

• https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-dis-max-query.html#query-dsl-dis-max-query
• must one more 쿼리 이며, 두필드에 검색할때 사용함.
• 더 높은 결과를 사용함.
• tie_breaker는 높은 점수 얻은 결과에 값을 할당해서 햇갈리지 않도록함.

  1. Take the relevance score from a matching clause with the highest score.
  2. Multiply the score from any other matching clauses by the tie_breaker value.
  3. Add the highest score to the multiplied scores.