使用RestHighLevelClient执行elasticsearch查询的最佳方法是什么

Question

尝试使用CompletionSuggester for autocomplete特性，通过Java的RestHighLevelClient实现CompletionSuggester有不同的方法，想知道以下这些方法之间（在性能/查询执行速度方面）有什么区别吗

1：使用CompletionSuggestionBuilder：

val completionSuggestionBuilder = SuggestBuilders.completionSuggestion("suggestedNames").prefix("ban", Fuzziness.ONE).size(10)
        
val suggestBuilder = SuggestBuilder().addSuggestion("find_doc_by_name", completionSuggestionBuilder)
val searchSourceBuilder = SearchSourceBuilder().suggest(suggestBuilder)
val searchRequest = SearchRequest("bus_locations").source(searchSourceBuilder)
val searchResponse = restClient.search(searchRequest, RequestOptions.DEFAULT)

2：使用SimpleQueryString

val query = """{"suggest":{"loc-suggest":{"prefix":"Ban","completion":{"field":"suggestedNames","size":10,"fuzzy":{"fuzziness":1},"contexts":{"locationType":[{"context":"AREA","boost":1},{"context":"CITY","boost":1}],"geolocation":[{"lon":77.6279354,"lat":12.9331699,"precision":"30km","boost":2}]}}}}}"""
val searchSourceBuilder = SearchSourceBuilder().query(QueryBuilders.simpleQueryStringQuery(query))
val searchRequest = SearchRequest("bus_locations").source(searchSourceBuilder)
val searchResponse = restClient.search(searchRequest, RequestOptions.DEFAULT)

Answer 1

根据您的应用程序和您的需要,它可能会有所不同,通常取决于许多变量,例如碎片复制的数量或索引级别中的索引映射等,由于place弹性构建在Apache-Lucene上，一般情况下，叶查询或复合查询对于简单的使用具有更好的性能，但如果您需要复杂的结果，最好的方法是使用聚合。此外，如果您希望在应用程序级处理查询语法，最好的方法是使用字符串本机查询作为示例。如果您有spring boot应用程序，最好的方法是绑定并创建字符串查询，而不是使用默认存储库，请考虑下面的示例

    @Query("{\"bool\":" +
            "{\"must\" :" +
            "[" + "" +
            "{\"query_string\":{ \"query\" : \"?0\", \"fields\" : [ \"parentKnowledgeGroupId\" ] }}," +
            "{\"query_string\":{ \"query\" : \"?1\", \"fields\" : [ \"knowledgeGroupId\" ]}}," +
            "{\"query_string\":{ \"query\" : \"?2\", \"fields\" : [ \"content\" ]}}," +
            "{\"query_string\":{ \"query\" : \"?3\", \"fields\" : [ \"courseType\" ]}}," +
            "]" +
            "}" +
            "}")
    ElasticModelSequence SearchCore(@Param("parentKnowledgeGroupId") String parentKnowledgeGroupId,
                                    @Param("knowledgeGroupId") String knowledgeGroupId, @Param("term") String term,
                                    @Param("courseType") ElasticModelSequence.CourseType courseType);