所有格_英语词干分析器在Elasticsearch中的使用 [英] Using of possessive_english stemmer in Elasticsearch

问题描述

我具有以下分析设置：

"settings" : { 
  "index" : { 
    "creation_date" : "1469213620697",
    "analysis" : { 
      "filter" : { 
        "stem_possessive_filter" : { 
          "name" : "possessive_english",
          "type" : "stemmer"
        }   
      },  
      "analyzer" : { 
        "stem_analyzer" : { 
          "filter" : [ "standard", "lowercase", "stem_possessive_filter" ],
          "tokenizer" : "standard"
        }   
      }   
    },  
    "number_of_shards" : "5",
    "number_of_replicas" : "1",
    "uuid" : "VQgaaZquQUOqKNYxGPH7cg",
    "version" : { 
      "created" : "2020199"
    }   
  }
},

每个字符串类型的字段都具有以下映射：

Every field of string type has the following mapping:

"field_name" : {
   "type" : "string",
    "analyzer" : "stem_analyzer",
    "search_analyzer" : "standard"
 }

我希望能够写阿尔茨海默氏症中的痴呆症 或阿尔茨海默氏症中的 痴呆症 。结果，我想在阿尔茨海默氏症中得到 痴呆症。 。

I want to be able to write dementia in alzheimer or dementia in alzheimer's phrase. And as a result, I want to get Dementia in Alzheimer's ....

多匹配查询在以下情况下不起作用

Multi match query doesn't work if the possession is not used:

{'query'：{'multi_match'：{'query'：老年痴呆症，'类型'：'phrase'，'fields'：['_all']}}}

但如果使用了所有物，则可以使用：

But it works if the possession is used:

{'query'：{'multi_match'：{'query'：老年痴呆症中的痴呆症，'type'：'短语'，'字段：['_ all']}}}

另一方面，布尔查询在不使用所有物的情况下有效：

On the other hand, Bool query works if the possession is not used:

{'query'：{'bool'：{'must'：[{'match_phrase'：{'Diagnosis'：老年痴呆症}}]}}} }

但如果拥有是

{'query'：{'bool'：{'must'：[{'match_phrase'：{'Diagnosis'：老年痴呆症的痴呆症}}}}}

如何使以上所有查询正常工作？

How to make all the queries above work?

-更新-

如果添加 stem_analyzer 在查询中。因此，您可以在搜索过程中使用它。无论有没有占有，我都会得到一个短语的结果。
mybody = {'query'：{'bool'：{'must'：[{'match_phrase'：{'Diagnosis'：{'query'：老年痴呆症的痴呆，' Analyzer'：'stem_analyzer'}}}}}}}

The bool query works if you add stem_analyzer in the query. Thus you use it during search. And I get results for a phrase both with and without possession. mybody = {'query': {'bool': {'must': [{'match_phrase': {'Diagnosis': {'query': "dementia in alzheimer's", 'analyzer': 'stem_analyzer'}}}]}}}

但是，如果添加分析器，多重匹配查询将完全停止工作。无论是否拥有，短语都不会得到任何结果。
{'query'：{'multi_match'：{'query'：老年痴呆症的痴呆症，'type'：'短语'，'analyzer'：'stem_analyzer'，'fields' ：['_all']}}}

But, the multi match query stops working at all if you add analyzer. I don't get any results for a phrase both with and without possession. {'query': {'multi_match': {'query': "dementia in alzheimer's", 'type': 'phrase', 'analyzer': 'stem_analyzer', 'fields': ['_all']}}}

为什么分析器不能用于多重匹配查询？

Why the analyzer doesn't work for the multi match query?

推荐答案

短语类型不适用于词干分析器进行多重匹配查询。但是 phrase_prefix 类型有效。坦白说，我不知道为什么。 文档。

The phrase type doesn't work with stem analyzer for the multi match query. But phrase_prefix type works. Frankly speaking, I don't know why. There is no hint about it in the documentation.

因此，以下两个多重匹配查询为我返回了相同的结果：

So, the following two multi match queries return the same results for me:

{'query'：{'multi_match'：{'query'：老年痴呆症，'type'：'phrase_prefix'，'analyzer'：'stem_analyzer'，'fields'：['_all']}}}

{'query'：{'multi_match'：{'query'：老年痴呆症，类型'：'phrase_prefix'，'analyzer'：'stem_analyzer'，'fields'：['_all']}}}

在布尔查询 match_phrase 与词干分析器配合使用。
以下两个查询返回相同的结果：

In the boolean query, match_phrase works with stem analyzer. The following two queries return the same results:

{'query'：{'bool'：{'must'：[ {'match_phrase'：{'Diagnosis'：{'query'：老年痴呆症， analyzer：'stem_analyzer'}}}}}}}

{'query'：{'bool'：{'must'：[{'match_phrase'：{'Diagnosis'：{'query'：老年痴呆症的痴呆症， 'analyzer'：'stem_analyzer'}}}]}}}

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