Question

我正在使用ES 2.4.6和Java 8，我创建了一个文档对象如下：

@Document(indexName = "airports", type = "airport")
public class Airport {

  @Id
  private String id;

  @Field(type = String)
  private String name;
}

我成功搜索了几个机场对象到ES，并跟随名称：＆＃34; San Francisco＆＃34;，＆＃34; San Mateo＆＃34;，＆＃34; Santiago＆＃34;，＆＃34; Palo Alto＆＃34;，＆＃34; Big San＆＃34; ES中的JSON内容如下所示：

{
  "took": 2,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "failed": 0
  },
  "hits": {
    "total": 5,
    "max_score": 1,
    "hits": [
      {
        "_index": "airports",
        "_type": "airport",
        "_id": "SSMlsTWIYefbXHCnYEwEY",
        "_score": 1,
        "_source": {
          "id": "SSMlsTWIYefbXHCnYEwEY",
          "name": "Santiago"
        }
      },
      {
        "_index": "airports",
        "_type": "airport",
        "_id": "LlDcKuywPjURNeIISjXLjC",
        "_score": 1,
        "_source": {
          "id": "LlDcKuywPjURNeIISjXLjC",
          "name": "San Mateo"
        }
      },
      {
        "_index": "airports",
        "_type": "airport",
        "_id": "CVIjEHYphSmZIjYbHCMwtkqfKWtEHVh",
        "_score": 1,
        "_source": {
          "id": "CVIjEHYphSmZIjYbHCMwtkqfKWtEHVh",
          "name": "San Francisco"
        }
      },
      {
        "_index": "airports",
        "_type": "airport",
        "_id": "gbntKR",
        "_score": 1,
        "_source": {
          "id": "gbntKR",
          "name": "Palo Alto"
        }
      },
      {
        "_index": "airports",
        "_type": "airport",
        "_id": "bKosUdHeseMMboyaejv",
        "_score": 1,
        "_source": {
          "id": "bKosUdHeseMMboyaejv",
          "name": "Big San"
        }
      }
    ]
  }
}

然后我有跟随curl命令使用正则表达式查询来查找所有机场名字盯着＆＃34; san＆＃34; 忽略案例，我做了：

curl -XGET 'localhost:9200/airports/airport/_search?pretty' -H 'Content-Type: application/json' -d'
{
    "query": {
        "regexp":{
            "name": "^(?i)san"
        }
    }
}
'

我使用正则表达式＆＃34; ^（？i）san＆＃34;直接匹配那些机场名称，它按预期工作：

String regex = "^(?i)san";
assertTrue("San Francisco".matches(regex));
assertTrue("San Mateo".matches(regex));
assertTrue("Santiago".matches(regex));
assertTrue(!"Big San".matches(regex));

那么有谁知道为什么ES正则表达式查询返回空结果？现在，如果我使用＆＃34; san＆＃34; 作为正则表达式，所有4个名称都返回，如果我使用＆＃34; San＆＃34; ，则不会返回任何内容。

Answer 1

您可以使用Match Phrase Prefix解决上述问题。

 {
  "query": {
    "match_phrase_prefix": {
       "name": "San"
      }
    }
 }

看看它是否可以解决您的问题。

ElasticSearch正则表达式查询不起作用

1 个答案: