从Elasticsearch搜索中删除重复的文档 [英] Remove duplicate documents from a search in Elasticsearch

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本文介绍了从Elasticsearch搜索中删除重复的文档的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有一个索引与大量的纸张相同的字段相同的值。我在这个领域有一个重复数据删除。



聚合器将作为计数器来到我身边。我想要一份文件清单。



我的索引:




  • Doc 1 {domain:'domain1.fr',name:'name1',date:'01 -01-2014'}

  • Doc 2 {domain:'domain1.fr',name:' name1',date:'01 -02-2014'}

  • Doc 3 {domain:'domain2.fr',name:'name2',date:'01 -03-2014' }

  • Doc 4 {domain:'domain2.fr',name:'name2',date:'01 -04-2014'}

  • Doc 5 {domain:'domain3.fr',name:'name3',date:'01 -05-2014'}

  • Doc 6 {domain:'domain3.fr',name :'name3',date:'01 -06-2014'}



我想要这个结果(域字段的重复数据删除结果):




  • Doc 6 {domain:'domain3.fr',name:'name3',date:'01 -06-2014'}

  • Doc 4 {domain:'domain2.fr',name:'name2',date:'01 -04-2014'}

  • Doc 2 {domain:'domain1.fr',name:'name1',date:'01 -02-2014'}


解决方案

您可以使用字段折叠,将结果分组到名称字段,并设置大小 top_hits 聚合器为1。

  / POST http:// localhost: 9200 / test / dedup / _search?search_type = count& pretty = true 
{
aggs:{
dedup:{
terms:{
field:name
},
aggs:{
dedup_docs:{
top_hits:{
size
}
}
}
}
}
}

这将返回:

  {
taken:192,
timed_out:false,
_shards:{
total:1,
successful:1,
failed:0
} ,
hits:{
total:6,
max_scor e:0.0,
hits:[]
},
聚合:{
dedup:{
buckets:[{
key:name1,
doc_count:2,
dedup_docs:{
hits:{
total:2,
max_score:1.0,
hits:[{
_index:test,
_type:dedup,
_id :1,
_score:1.0,
_source:{domain:domain1.fr,name:name1,date:01-01-2014}
$]
}
}
},{
key:name2,
doc_count:2,
dedup_docs :{
hits:{
total:2,
max_score:1.0,
hits:[{
_index测试,
_type:dedup,
_id:3,
_score:1.0,
_source:{domain:domain1 .fr,name:name2,日期:01-03-2014}
}]
}
}
},{
key:name3,
doc_count:2,
dedup_docs:{
hits:{
total:2,
max_score:1.0,
hits :[{
_index:test,
_type:dedup,
_id:5,
_score:1.0,
_source:{domain:domain1.fr,name:name3,date:01-05-2014}
}]
}
}
}]
}
}
}


I have an index with a lot of paper with the same value for the same field. I have one deduplication on this field.

Aggregators will come to me as counters. I would like a list of documents.

My index :

  • Doc 1 {domain: 'domain1.fr', name: 'name1', date: '01-01-2014'}
  • Doc 2 {domain: 'domain1.fr', name: 'name1', date: '01-02-2014'}
  • Doc 3 {domain: 'domain2.fr', name: 'name2', date: '01-03-2014'}
  • Doc 4 {domain: 'domain2.fr', name: 'name2', date: '01-04-2014'}
  • Doc 5 {domain: 'domain3.fr', name: 'name3', date: '01-05-2014'}
  • Doc 6 {domain: 'domain3.fr', name: 'name3', date: '01-06-2014'}

I want this result (deduplication result by domain field) :

  • Doc 6 {domain: 'domain3.fr', name: 'name3', date: '01-06-2014'}
  • Doc 4 {domain: 'domain2.fr', name: 'name2', date: '01-04-2014'}
  • Doc 2 {domain: 'domain1.fr', name: 'name1', date: '01-02-2014'}

解决方案

You could use field collapsing, group the results on the name field and set the size of the top_hits aggregator to 1.

/POST http://localhost:9200/test/dedup/_search?search_type=count&pretty=true
{
  "aggs":{
    "dedup" : {
      "terms":{
        "field": "name"
       },
       "aggs":{
         "dedup_docs":{
           "top_hits":{
             "size":1
           }
         }
       }    
    }
  }
}

this returns:

{
  "took" : 192,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "failed" : 0
  },
  "hits" : {
    "total" : 6,
    "max_score" : 0.0,
    "hits" : [ ]
  },
  "aggregations" : {
    "dedup" : {
      "buckets" : [ {
        "key" : "name1",
        "doc_count" : 2,
        "dedup_docs" : {
          "hits" : {
          "total" : 2,
          "max_score" : 1.0,
          "hits" : [ {
            "_index" : "test",
            "_type" : "dedup",
            "_id" : "1",
            "_score" : 1.0,
            "_source":{domain: "domain1.fr", name: "name1", date: "01-01-2014"}
          } ]
        }
      }
    }, {
      "key" : "name2",
      "doc_count" : 2,
      "dedup_docs" : {
        "hits" : {
          "total" : 2,
          "max_score" : 1.0,
          "hits" : [ {
            "_index" : "test",
            "_type" : "dedup",
            "_id" : "3",
            "_score" : 1.0,
            "_source":{domain: "domain1.fr", name: "name2", date: "01-03-2014"}
          } ]
        }
      }
    }, {
      "key" : "name3",
      "doc_count" : 2,
      "dedup_docs" : {
        "hits" : {
          "total" : 2,
          "max_score" : 1.0,
          "hits" : [ {
            "_index" : "test",
            "_type" : "dedup",
            "_id" : "5",
            "_score" : 1.0,
            "_source":{domain: "domain1.fr", name: "name3", date: "01-05-2014"}
           } ]
         }
       }
     } ]
   }
 }
}

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