1. ignore_above

關(guān)于es mapping的keyword ignore_above配置項的解釋如下：

Do not index any string longer than this value. Defaults to?2147483647?so that all values would be accepted.

不會索引大于ignore_above配置值的數(shù)據(jù)，默認值2147483647字符。注意：動態(tài)mappings中自動為256。

Strings longer than the?ignore_above?setting will not be indexed or stored. For arrays of strings,?ignore_above?will be applied for each array element separately and string elements longer than?ignore_above?will not be indexed or stored

大于ignore_above設(shè)置的字符串將不會被索引或存儲。

注意：

All strings/array elements will still be present in the?_source?field, if the latter is enabled which is the default in Elasticsearch.

默認所有的字符串/數(shù)組元素仍然會出現(xiàn)在_source字段中。

2.測試

創(chuàng)建索引 test_keyword，指定長度超過10的數(shù)據(jù)不索引

PUT test_keyword
{
  "mappings": {
    "properties": {
      "name":{
        "type":"keyword",
        "ignore_above": 10
      }
    }
  }
}

向索引中寫入數(shù)據(jù)：

PUT test_keyword/_doc/1
{
  "name":"1234567890"
}

PUT test_keyword/_doc/2
{
  "name":"12345678901"
}

查詢數(shù)據(jù)，結(jié)果如下：

#可以查詢到數(shù)據(jù)結(jié)果
GET test_keyword/_search
{
  "query":{
    "term": {
      "name": "1234567890"
    }
  }
}


#查詢不到數(shù)據(jù)結(jié)果
GET test_keyword/_search
{
  "query":{
    "term": {
      "name": "12345678901"
    }
  }
}

在查詢所有數(shù)據(jù)_source中可以看到“12345678901”這條數(shù)據(jù)，說明“12345678901”這條數(shù)據(jù)沒有被索引。文章來源地址http://www.zghlxwxcb.cn/news/detail-722510.html

GET test_keyword/_search


{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "test_keyword",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 1.0,
        "_source" : {
          "name" : "1234567890"
        }
      },
      {
        "_index" : "test_keyword",
        "_type" : "_doc",
        "_id" : "2",
        "_score" : 1.0,
        "_ignored" : [
          "name"
        ],
        "_source" : {
          "name" : "12345678901"
        }
      }
    ]
  }
}

到了這里，關(guān)于Elasticsearch keyword 中的 ignore_above配置項的文章就介紹完了。如果您還想了解更多內(nèi)容，請在右上角搜索TOY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章，希望大家以后多多支持TOY模板網(wǎng)！