ES10-檢索入門

1.建立索引，準備數據

定義索引結構

DELETE telegraph

PUT telegraph
{
  "mappings": {
    "msg":{
      "properties": {
        "title":{
          "type": "text",
          "analyzer": "ik_max_word"
        },
        "content":{
          "type": "text",
          "analyzer": "ik_max_word"
        },
        "author":{
          "type": "text"
        },
        "pubdate":{
          "type": "date",
          "format": "date_hour_minute_second"
        }
      }
    }
  }
}

批量加入測試數據

POST _bulk
{"index":{"_index":"telegraph","_type":"msg"}}
{"title":"寶泰隆：半年報預增140%-156%","content":"公司主要產品焦炭、甲醇銷售量及銷售價格較上年同期有較大的上漲","author":"寶泰隆","pubdate":"2018-07-17T17:16:30"}
{"index":{"_index":"telegraph","_type":"msg"}}
{"title":"週五召開董事會會議 審議及批准更新後的一季報","content":"以審議及批准更新後的2018年第一季度報告","author":"中興通信","pubdate":"2018-07-17T12:33:11"}
{"index":{"_index":"telegraph","_type":"msg"}}
{"title":"長生生物再次跌停 三機構拋售近1000萬元","content":"長生生物再次一字跌停，報收19.89元，成交1432萬元","author":"長生生物","pubdate":"2018-07-17T10:03:11"}
{"index":{"_index":"telegraph","_type":"msg"}}
{"title":"碧桂園集團副主席楊惠妍","content":"楊惠妍分別於7月10日、11日買入碧桂園1000萬股、1500萬股","author":"小財注","pubdate":"2018-07-17T16:12:55"}
{"index":{"_index":"telegraph","_type":"msg"}}
{"title":"河北聚焦十大行業推動國際產能合做","content":"河北省政府近日出臺積極參與「一帶一路」建設推動國際產能合做實施方案","author":"財聯社","pubdate":"2018-07-17T14:14:55"}

2.term查詢

GET telegraph/_search
{
  "query": {
    "term": {
      "title": {
        "value": "主席"
      }
    }
  }
}

查詢結果

{
  "took": 5,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 1,
    "max_score": 0.2876821,
    "hits": [
      {
        "_index": "telegraph",
        "_type": "msg",
        "_id": "A5etp2QBW8hrYY3zGJk7",
        "_score": 0.2876821,
        "_source": {
          "title": "碧桂園集團副主席楊惠妍",
          "content": "楊惠妍分別於7月10日、11日買入碧桂園1000萬股、1500萬股",
          "author": "小財注",
          "pubdate": "2018-07-17T16:12:55"
        }
      }
    ]
  }
}

3.分頁

from：起始行

size：返回條數

GET telegraph/_search
{
  "from": 0,
  "size": 3,
  "query": {
    "match_all": {}
  }
}

查詢結果

{
  "took": 6,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 5,
    "max_score": 1,
    "hits": [
      {
        "_index": "telegraph",
        "_type": "msg",
        "_id": "AZetp2QBW8hrYY3zGJk7",
        "_score": 1,
        "_source": {
          "title": "週五召開董事會會議 審議及批准更新後的一季報",
          "content": "以審議及批准更新後的2018年第一季度報告",
          "author": "中興通信",
          "pubdate": "2018-07-17T12:33:11"
        }
      },
      {
        "_index": "telegraph",
        "_type": "msg",
        "_id": "A5etp2QBW8hrYY3zGJk7",
        "_score": 1,
        "_source": {
          "title": "碧桂園集團副主席楊惠妍",
          "content": "楊惠妍分別於7月10日、11日買入碧桂園1000萬股、1500萬股",
          "author": "小財注",
          "pubdate": "2018-07-17T16:12:55"
        }
      },
      {
        "_index": "telegraph",
        "_type": "msg",
        "_id": "AJetp2QBW8hrYY3zGJk7",
        "_score": 1,
        "_source": {
          "title": "寶泰隆：半年報預增140%-156%",
          "content": "公司主要產品焦炭、甲醇銷售量及銷售價格較上年同期有較大的上漲",
          "author": "寶泰隆",
          "pubdate": "2018-07-17T17:16:30"
        }
      }
    ]
  }
}

4.過濾字段

指定只須要返回的字段值

GET telegraph/_search
{
  "_source": ["title","content"],
  "query": {
    "term": {
      "title": {
        "value": "主席"
      }
    }
  }
}

查詢結果

{
  "took": 13,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 1,
    "max_score": 0.2876821,
    "hits": [
      {
        "_index": "telegraph",
        "_type": "msg",
        "_id": "A5etp2QBW8hrYY3zGJk7",
        "_score": 0.2876821,
        "_source": {
          "title": "碧桂園集團副主席楊惠妍",
          "content": "楊惠妍分別於7月10日、11日買入碧桂園1000萬股、1500萬股"
        }
      }
    ]
  }
}

5.顯示version

設置version字段爲true，顯示文檔版本號

GET telegraph/_search
{
  "_source": "title",
  "version": true, 
  "query": {
    "term": {
      "title": {
        "value": "主席"
      }
    }
  }
}

查詢結果

{
  "took": 8,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 1,
    "max_score": 0.2876821,
    "hits": [
      {
        "_index": "telegraph",
        "_type": "msg",
        "_id": "A5etp2QBW8hrYY3zGJk7",
        "_version": 1,
        "_score": 0.2876821,
        "_source": {
          "title": "碧桂園集團副主席楊惠妍"
        }
      }
    ]
  }
}

6.評分過濾

過濾知足最小評分的文檔

GET telegraph/_search
{
  "min_score":"0.2",
  "query": {
    "term": {
      "title": {
        "value": "碧桂園"
      }
    }
  }
}

查詢結果

{
  "took": 5,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 1,
    "max_score": 0.2876821,
    "hits": [
      {
        "_index": "telegraph",
        "_type": "msg",
        "_id": "A5etp2QBW8hrYY3zGJk7",
        "_score": 0.2876821,
        "_source": {
          "title": "碧桂園集團副主席楊惠妍",
          "content": "楊惠妍分別於7月10日、11日買入碧桂園1000萬股、1500萬股",
          "author": "小財注",
          "pubdate": "2018-07-17T16:12:55"
        }
      }
    ]
  }
}

7.高亮關鍵字

設置屬性，且該屬性中有對應查詢條件的關鍵字時高亮顯示。

GET telegraph/_search
{
  "query": {
    "term": {
      "title": {
        "value": "會議"
      }
    }
  },
  "highlight": {
    "fields": {
      "title": {}
    }
  }
}

查詢結果

{
  "took": 9,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 1,
    "max_score": 0.2876821,
    "hits": [
      {
        "_index": "telegraph",
        "_type": "msg",
        "_id": "AZetp2QBW8hrYY3zGJk7",
        "_score": 0.2876821,
        "_source": {
          "title": "週五召開董事會會議 審議及批准更新後的一季報",
          "content": "以審議及批准更新後的2018年第一季度報告",
          "author": "中興通信",
          "pubdate": "2018-07-17T12:33:11"
        },
        "highlight": {
          "title": [
            "週五召開董事會<em>會議</em> 審議及批准更新後的一季報"
          ]
        }
      }
    ]
  }
}