ElasticSearch多字段搜索

Question

我如何像這樣為彈性搜索創建身體

select * from table where full_name like '%q%' or address like '%q%' or description like '%q%' order by full_name , description , address

Answer 1

通配符查詢可能非常昂貴，尤其是在多個字段中搜索時。 正確的方法是在僅要搜索一部分的字段上使用nGram令牌過濾器 。

首先，使用自定義分析器創建如下所示的索引，該索引會將您的字段切成小塊並切成可搜索的標記：

curl -XPUT localhost:9200/tests -d '{
  "settings": {
    "analysis": {
      "analyzer": {
        "substring_analyzer": {
          "tokenizer": "standard",
          "filter": ["lowercase", "substring"]
        }
      },
      "filter": {
        "substring": {
          "type": "nGram",
          "min_gram": 1,
          "max_gram": 15
        }
      }
    }
  },
  "mappings": {
    "test": {
      "properties": {
        "full_name": {
          "type": "string",
          "analyzer": "substring_analyzer"
        },
        "address": {
          "type": "string",
          "analyzer": "substring_analyzer"
        },
        "description": {
          "type": "string",
          "analyzer": "substring_analyzer"
        }
      }
    }
  }
}'

然后，您可以索引一些文檔：

curl -XPUT localhost:9200/tests/test/_bulk -d '
{"index":{"_id": 1}}
{"full_name": "Doe", "address": "1234 Quinn Street", "description": "Lovely guy"}
{"index":{"_id": 2}}
{"full_name": "Brennan", "address": "4567 Main Street", "description": "Not qualified"}
{"index":{"_id": 3}}
{"full_name": "Quantic", "address": "1234 Quinn Street", "description": "New friend"}
'

最后，您可以使用與上述SQL查詢等效的查詢進行搜索，並且所有三個測試文檔都將匹配：

curl -XPUT localhost:9200/tests/test/_search -d '{
  "query": {
    "bool": {
      "should": [
        {
          "match": {
            "full_name": "q"
          }
        },
        {
          "match": {
            "address": "q"
          }
        },
        {
          "match": {
            "description": "q"
          }
        }
      ]
    }
  }
}'

Answer 2

您可以嘗試以下方法。 。 。 https:// www.elastic.co/ guide/ zh- CN/ elasticsearch/ reference/ current/ query- dsl- wildcard- query.html`

{
    "wildcard" : { "user" : "ki*y" }
}

`