999久久久无码国产精品,西西人体大胆午夜视频,欧美国产成人精品一区二区三区

Query Context & Filter Context

image.png

?級搜索的功能：?持多項?本輸?，針對多個字段進?搜索。
搜索引擎?般也提供基于時間，價格等條件的過濾
在 ElasticSearch 中，有Query 和 Filter 兩種不同的 Context
Query Context：相關性算分
Filter Context：不需要算分（ Yes or No），可以利? Cache，獲得更好的性能

條件組合

假設要搜索?本電影，包含了以下?些條件
- 評論中包含了 Guitar，?戶打分?于 3 分，同時上映?期要在 1993 與 2000 年之間
這個搜索其實包含了 3 段邏輯，針對不同的字段
- 評論字段中要包含 Guitar / ?戶評分?于 3 / 上映?期?期需要在給定的范圍
同時包含這三個邏輯，并且有?較好的性能？

復合查詢： bool Query

bool 查詢

?個 bool 查詢，是?個或者多個查詢?句的組合
總共包括 4 種?句。其中 2 種會影響算分，2 種不影響算分
相關性并不只是全?本檢索的專利。也適?于 yes | no 的?句，匹配的?句越多，相關性評分越?。如果多條查詢?句被合并為?條復合查詢語句，?如 bool 查詢，則每個查詢?句計算得出的評分會被合并到總的相關性評分中。

關鍵字	類型
must	Query Context 必須匹配。貢獻算分
should	Query Context 選擇性匹配。貢獻算分
must_not	Filter Context 查詢字句，必須不能匹配
filter	Filter Context 必須匹配，但是不貢獻算分

bool 查詢語法

POST /products/_search
{
  "query": {
    "bool" : {
      "must" : {
        "term" : { "price" : "30" }
      },
      "filter": {
        "term" : { "avaliable" : "true" }
      },
      "must_not" : {
        "range" : {
          "price" : { "lte" : 10 }
        }
      },
      "should" : [
        { "term" : { "productID.keyword" : "JODL-X-1937-#pV7" } },
        { "term" : { "productID.keyword" : "XHDK-A-1293-#fJ3" } }
      ],
      "minimum_should_match" :1
    }
  }
}

?查詢可以任意順序出現
可以嵌套多個查詢
如果你的 bool 查詢中，沒有 must 條件， should 中必須?少滿??條查詢

如何解決結構化查詢 – “包含?不是相等”的問題

image.png

解決?案：增加?個 genre count 字段進 ?計數

增加 count 字段，使? bool 查詢解決

增加 count 字段，使? bool 查詢解決


#改變數據模型，增加字段。解決數組包含而不是精確匹配的問題
POST /newmovies/_bulk
{ "index": { "_id": 1 }}
{ "title" : "Father of the Bridge Part II","year":1995, "genre":"Comedy","genre_count":1 }
{ "index": { "_id": 2 }}
{ "title" : "Dave","year":1993,"genre":["Comedy","Romance"],"genre_count":2 }

#must，有算分
POST /newmovies/_search
{
  "query": {
    "bool": {
      "must": [
        {"term": {"genre.keyword": {"value": "Comedy"}}},
        {"term": {"genre_count": {"value": 1}}}

      ]
    }
  }
}

#Filter。不參與算分，結果的score是0
POST /newmovies/_search
{
  "query": {
    "bool": {
      "filter": [
        {"term": {"genre.keyword": {"value": "Comedy"}}},
        {"term": {"genre_count": {"value": 1}}}
        ]

    }
  }
}

Filter Context – 不影響算分

#Filtering Context
POST _search
{
  "query": {
    "bool" : {

      "filter": {
        "term" : { "avaliable" : "true" }
      },
      "must_not" : {
        "range" : {
          "price" : { "lte" : 10 }
        }
      }
    }
  }
}

image.png

Query Context – 影響算分

POST /products/_search
{
  "query": {
    "bool": {
      "should": [
        {
          "term": {
            "productID.keyword": {
              "value": "JODL-X-1937-#pV7"}}
        },
        {"term": {"avaliable": {"value": true}}
        }
      ]
    }
  }
}

image.png

bool 嵌套

#嵌套，實現了 should not 邏輯
POST /products/_search
{
  "query": {
    "bool": {
      "must": {
        "term": {
          "price": "30"
        }
      },
      "should": [
        {
          "bool": {
            "must_not": {
              "term": {
                "avaliable": "false"
              }
            }
          }
        }
      ],
      "minimum_should_match": 1
    }
  }
}

查詢語句的結構，會對相關度算分產?影響

同?層級下的競爭字段，具有有相同的權重
通過嵌套 bool 查詢，可以改變對算分的影響

POST /animals/_search
{
  "query": {
    "bool": {
      "should": [
        { "term": { "text": "brown" }},
        { "term": { "text": "red" }},
        { "term": { "text": "quick"   }},
        { "term": { "text": "dog"   }}
      ]
    }
  }
}

POST /animals/_search
{
  "query": {
    "bool": {
      "should": [
        { "term": { "text": "quick" }},
        { "term": { "text": "dog"   }},
        {
          "bool":{
            "should":[
               { "term": { "text": "brown" }},
                 { "term": { "text": "brown" }},
            ]
          }

        }
      ]
    }
  }
}

控制字段的 Boosting

POST /blogs/_bulk
{ "index": { "_id": 1 }}
{"title":"Apple iPad", "content":"Apple iPad,Apple iPad" }
{ "index": { "_id": 2 }}
{"title":"Apple iPad,Apple iPad", "content":"Apple iPad" }


POST blogs/_search
{
  "query": {
    "bool": {
      "should": [
        {"match": {
          "title": {
            "query": "apple,ipad",
            "boost": 1.1
          }
        }},

        {"match": {
          "content": {
            "query": "apple,ipad",
            "boost": 1
          }
        }}
      ]
    }
  }
}

Boosting 是控制相關度的?種?段
- 索引，字段或查詢?條件
參數 boost的含義
- 當 boost > 1 時，打分的相關度相對性提升
- 當 0 < boost < 1 時，打分的權重相對性降低
- 當 boost < 0 時，貢獻負分

Not Quite Not

要求蘋果公司的產品信息優先

POST /news/_bulk
{ "index": { "_id": 1 }}
{ "content":"Apple Mac" }
{ "index": { "_id": 2 }}
{ "content":"Apple iPad" }
{ "index": { "_id": 3 }}
{ "content":"Apple employee like Apple Pie and Apple Juice" }


POST news/_search
{
  "query": {
    "bool": {
      "must": {
        "match":{"content":"apple"}
      }
    }
  }
}

image.png

Boosting Query

POST news/_search
{
  "query": {
    "bool": {
      "must": {
        "match":{"content":"apple"}
      },
      "must_not": {
        "match":{"content":"pie"}
      }
    }
  }
}

POST news/_search
{
  "query": {
    "boosting": {
      "positive": {
        "match": {
          "content": "apple"
        }
      },
      "negative": {
        "match": {
          "content": "pie"
        }
      },
      "negative_boost": 0.5
    }
  }
}

本節知識點回顧

Query Context vs. Filter Context
Bool Query – 更多的條件組合
查詢結構與相關性算分
如何控制查詢的精確度
- Boosting & Boosting Query

課程demo

POST /products/_bulk
{ "index": { "_id": 1 }}
{ "price" : 10,"avaliable":true,"date":"2018-01-01", "productID" : "XHDK-A-1293-#fJ3" }
{ "index": { "_id": 2 }}
{ "price" : 20,"avaliable":true,"date":"2019-01-01", "productID" : "KDKE-B-9947-#kL5" }
{ "index": { "_id": 3 }}
{ "price" : 30,"avaliable":true, "productID" : "JODL-X-1937-#pV7" }
{ "index": { "_id": 4 }}
{ "price" : 30,"avaliable":false, "productID" : "QQPX-R-3956-#aD8" }



#基本語法
POST /products/_search
{
  "query": {
    "bool" : {
      "must" : {
        "term" : { "price" : "30" }
      },
      "filter": {
        "term" : { "avaliable" : "true" }
      },
      "must_not" : {
        "range" : {
          "price" : { "lte" : 10 }
        }
      },
      "should" : [
        { "term" : { "productID.keyword" : "JODL-X-1937-#pV7" } },
        { "term" : { "productID.keyword" : "XHDK-A-1293-#fJ3" } }
      ],
      "minimum_should_match" :1
    }
  }
}

#改變數據模型，增加字段。解決數組包含而不是精確匹配的問題
POST /newmovies/_bulk
{ "index": { "_id": 1 }}
{ "title" : "Father of the Bridge Part II","year":1995, "genre":"Comedy","genre_count":1 }
{ "index": { "_id": 2 }}
{ "title" : "Dave","year":1993,"genre":["Comedy","Romance"],"genre_count":2 }

#must，有算分
POST /newmovies/_search
{
  "query": {
    "bool": {
      "must": [
        {"term": {"genre.keyword": {"value": "Comedy"}}},
        {"term": {"genre_count": {"value": 1}}}

      ]
    }
  }
}

#Filter。不參與算分，結果的score是0
POST /newmovies/_search
{
  "query": {
    "bool": {
      "filter": [
        {"term": {"genre.keyword": {"value": "Comedy"}}},
        {"term": {"genre_count": {"value": 1}}}
        ]

    }
  }
}


#Filtering Context
POST _search
{
  "query": {
    "bool" : {

      "filter": {
        "term" : { "avaliable" : "true" }
      },
      "must_not" : {
        "range" : {
          "price" : { "lte" : 10 }
        }
      }
    }
  }
}


#Query Context
POST /products/_bulk
{ "index": { "_id": 1 }}
{ "price" : 10,"avaliable":true,"date":"2018-01-01", "productID" : "XHDK-A-1293-#fJ3" }
{ "index": { "_id": 2 }}
{ "price" : 20,"avaliable":true,"date":"2019-01-01", "productID" : "KDKE-B-9947-#kL5" }
{ "index": { "_id": 3 }}
{ "price" : 30,"avaliable":true, "productID" : "JODL-X-1937-#pV7" }
{ "index": { "_id": 4 }}
{ "price" : 30,"avaliable":false, "productID" : "QQPX-R-3956-#aD8" }


POST /products/_search
{
  "query": {
    "bool": {
      "should": [
        {
          "term": {
            "productID.keyword": {
              "value": "JODL-X-1937-#pV7"}}
        },
        {"term": {"avaliable": {"value": true}}
        }
      ]
    }
  }
}


#嵌套，實現了 should not 邏輯
POST /products/_search
{
  "query": {
    "bool": {
      "must": {
        "term": {
          "price": "30"
        }
      },
      "should": [
        {
          "bool": {
            "must_not": {
              "term": {
                "avaliable": "false"
              }
            }
          }
        }
      ],
      "minimum_should_match": 1
    }
  }
}


#Controll the Precision
POST _search
{
  "query": {
    "bool" : {
      "must" : {
        "term" : { "price" : "30" }
      },
      "filter": {
        "term" : { "avaliable" : "true" }
      },
      "must_not" : {
        "range" : {
          "price" : { "lte" : 10 }
        }
      },
      "should" : [
        { "term" : { "productID.keyword" : "JODL-X-1937-#pV7" } },
        { "term" : { "productID.keyword" : "XHDK-A-1293-#fJ3" } }
      ],
      "minimum_should_match" :2
    }
  }
}



POST /animals/_search
{
  "query": {
    "bool": {
      "should": [
        { "term": { "text": "brown" }},
        { "term": { "text": "red" }},
        { "term": { "text": "quick"   }},
        { "term": { "text": "dog"   }}
      ]
    }
  }
}

POST /animals/_search
{
  "query": {
    "bool": {
      "should": [
        { "term": { "text": "quick" }},
        { "term": { "text": "dog"   }},
        {
          "bool":{
            "should":[
               { "term": { "text": "brown" }},
                 { "term": { "text": "brown" }},
            ]
          }

        }
      ]
    }
  }
}


DELETE blogs
POST /blogs/_bulk
{ "index": { "_id": 1 }}
{"title":"Apple iPad", "content":"Apple iPad,Apple iPad" }
{ "index": { "_id": 2 }}
{"title":"Apple iPad,Apple iPad", "content":"Apple iPad" }


POST blogs/_search
{
  "query": {
    "bool": {
      "should": [
        {"match": {
          "title": {
            "query": "apple,ipad",
            "boost": 1.1
          }
        }},

        {"match": {
          "content": {
            "query": "apple,ipad",
            "boost":
          }
        }}
      ]
    }
  }
}

DELETE news
POST /news/_bulk
{ "index": { "_id": 1 }}
{ "content":"Apple Mac" }
{ "index": { "_id": 2 }}
{ "content":"Apple iPad" }
{ "index": { "_id": 3 }}
{ "content":"Apple employee like Apple Pie and Apple Juice" }


POST news/_search
{
  "query": {
    "bool": {
      "must": {
        "match":{"content":"apple"}
      }
    }
  }
}

POST news/_search
{
  "query": {
    "bool": {
      "must": {
        "match":{"content":"apple"}
      },
      "must_not": {
        "match":{"content":"pie"}
      }
    }
  }
}

POST news/_search
{
  "query": {
    "boosting": {
      "positive": {
        "match": {
          "content": "apple"
        }
      },
      "negative": {
        "match": {
          "content": "pie"
        }
      },
      "negative_boost": 0.5
    }
  }
}

相關閱讀

https://www.elastic.co/guide/en/elasticsearch/reference/current/query-filter-context.html

https://www.elastic.co/guide/en/elasticsearch/reference/7.1/query-dsl-boosting-query.html

三个男躁一个女,国精产品一区一手机的秘密,麦子交换系列最经典十句话,欧美国产综合欧美视频

4.4-Query&Filtering實現多字符串多字段查詢

4.4-Query&Filtering實現多字符串多字段查詢

Query Context & Filter Context

條件組合

bool 查詢

bool 查詢語法

如何解決結構化查詢 – “包含?不是相等”的問題

增加 count 字段，使? bool 查詢解決

Filter Context – 不影響算分

Query Context – 影響算分

bool 嵌套

查詢語句的結構，會對相關度算分產?影響

控制字段的 Boosting

Not Quite Not

Boosting Query

本節知識點回顧

課程demo

相關閱讀

推薦閱讀更多精彩內容

三个男躁一个女,国精产品一区一手机的秘密,麦子交换系列最经典十句话,欧美 国产 综合 欧美 视频

4.4-Query&Filtering實現多字符串多字段查詢

Query Context & Filter Context

條件組合

bool 查詢

bool 查詢語法

如何解決結構化查詢 – “包含?不是相等”的問題

增加 count 字段，使? bool 查詢解決

Filter Context – 不影響算分

Query Context – 影響算分

bool 嵌套

查詢語句的結構，會對相關度算分產?影響

控制字段的 Boosting

Not Quite Not

Boosting Query

本節知識點回顧

課程demo

相關閱讀

推薦閱讀更多精彩內容

三个男躁一个女,国精产品一区一手机的秘密,麦子交换系列最经典十句话,欧美国产综合欧美视频