ElasticSearch6.x 之全文查询

悠悠 2024-02-19 21:16 58阅读 0赞

第一个：ElasticSearch6.x 中match 和term 之间的区别

match: 模糊匹配查询

term: 精确查询

示列：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 1][]

全文检索定义说明：全文检索通常用于在全文本字段（如电子邮件正文）上运行全文检索，且分词查询的词组。

全文检索之match检索 （默认or 操作符）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 2][]

POST  http://192.168.1.74:9200/website/blog/_search/
    {
     "query": {
        "match": {
           "title": {
                 "query":"Spring-Security"
              }
         }
      }
    }

全文检索之match检索 （and 操作符）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 3][]

{
     "query": {
        "match": {
           "title": {
                 "query":"Spring-Security",
                 "operator":"and"
              }
         }
      }
    }

全文检索之match\_phrase检索(短语检索)

与match query类似，但用于匹配精确短语，可称为**短语查询**。

match\_phrase查询会将查询内容分词，分词器可以自定义，文档中同时满足以下两个条件才会被检索到：

1.  分词后所有词项都要出现在该字段中
2.  字段中的词项顺序要一致

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 4][]

POST  http://192.168.1.74:9200/website/blog/_search/
    {
     "query": {
         "match_phrase": {
          "title": "Spring-Security"
        }
      }
    }

全文检索之match\_phrase\_prefix检索（前缀查询）

match\_phrase\_prefix与match\_phrase相同,对match\_phrase进行了扩展，查询内容的最后一个分词与只要满足前缀匹配即可。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 5][]

POST  http://192.168.1.74:9200/website/blog/_search/
    {
     "query": {
         "match_phrase_prefix": {
          "title": "Spring-Security"
        }
      }
    }

全文检索之multi\_match检索

multi\_match查询是match查询的升级版，用于多字段检索。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 6][]

POST  http://192.168.1.74:9200/website/blog/_search/
    {
     "query": {
         "multi_match": {
          "query": "ElasticSearch6.x",
          "fields": ["title","abstract"]
        }
      }
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/15f5951e5fd146679ff4ed0c4e78906c.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/a6fd5d0164894756961ac20899959b69.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 2]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/d8d1dca02d084a4c8394d71fef218495.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 3]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/06f7c2e86cf7496cb6ec8c506550309e.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 4]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/de79f75436e848088681f6a7e42a8335.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 5]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/63bcf40ac85241208760715fc60b6742.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 6]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/d3a2887cdb3b498aa0fae869e42e6429.png