elasticsearch(4)查询DSL

亦凉 2022-05-13 02:04 205阅读 0赞

## 全部搜索 ##

GET /index/type/_search
    {
      "query": {
        "match_all": {}
      }
    }

例如：

GET /ecommerce/product/_search
    {
      "query": {
        "match_all": {}
      }
    }

## 分页搜索 ##

GET /index/type/_search
    {
      "query": {
        xxx
      },
      "from": 0,
      "size": 10
    }

例如：

GET /ecommerce/product/_search
    {
      "query": {
        "match_all": {}
      },
      "from": 0,
      "size": 10
    }

## 搜索返回指定字段 ##

GET /ecommerce/product/_search
    {
      "query": {
        xxx
      },
      "_source": ["key1","key2"]
    }

例如：

GET /ecommerce/product/_search
    {
      "query": {
        "match_all": {}
      },
      "_source": ["name","price"]
    }

## 指定字段分词搜索 ##

GET /index/type/_search
    {
      "query": {
        "match": {
          "key1": "value1"
        }
      }
    }

例如：

GET /ecommerce/product/_search
    {
      "query": {
        "match": {
          "name": "牙膏"
        }
      }
    }

## 查询排序 ##

GET /index/type/_search
    {
      "query": {
        xxx
      },
      "sort": [
        {
          "key1": {
            "order": "asc|desc"
          }
        }
      ]
    }

例如：

GET /ecommerce/product/_search
    {
      "query": {
        "match_all": {}
      },
      "sort": [
        {
          "price": {
            "order": "desc"
          }
        }
      ]
    }

## 查询filter ##

filter不涉及积分计算，因此filter的效率比普通查询的效率要高。

例如：

GET /ecommerce/product/_search
    {
      "query": {
        "bool": {
          "must": {
            "match":{
              "name":"牙膏"
            }
          },
          "filter": {
            "range": {
              "price": {
                "gt": 10,
                "lte": 30
              }
            }
          }
        }
      }
    }

## 查询phrase ##

跟match全文检索相反，全文检索会将搜索输入分词拆解，去倒排索引中一一匹配，只要有一个分词能在倒排索引中匹配上，就可以作为结果返回。

phrase不会将搜索输入分词，必须在指定字段值中完全包含搜索输入才算搜索匹配，作为结果返回。

例如：在match全文检索模式下，`高露洁`可以匹配上`高露洁牙膏`和`佳洁士牙膏`；在phrase模式下，可以匹配上`高露洁牙膏`，但匹配不上`佳洁士牙膏`。

GET /ecommerce/product/_search
    {
      "query": {
        "match_phrase": {
          "name": "高露洁"
        }
      }
    }

## 查询高亮 ##

GET /index/type/_search
    {
      "query": {
        xxx
      },
      "highlight": {
        "fields": {
          "key1": {}
        }
      }
    }

例如：

#### requset ####

GET /ecommerce/product/_search
    {
      "query": {
        "match": {
          "name": "高露洁"
        }
      },
      "highlight": {
        "fields": {
          "name": {}
        }
      }
    }

#### response ####

{
 "took": 6,
 "timed_out": false,
 "_shards": { "total": 5, "successful": 5, "skipped": 0, "failed": 0 },
 "hits": { "total": 2, "max_score": 0.8630463, "hits": [ { "_index": "ecommerce", "_type": "product", "_id": "2", "_score": 0.8630463, "_source": { "name": "高露洁牙膏", "price": 20 }, "highlight": { "name": [ "高露洁牙膏" ] } }, { "_index": "ecommerce", "_type": "product", "_id": "1", "_score": 0.2876821, "_source": { "name": "佳洁士牙膏", "price": 30 }, "highlight": { "name": [ "佳洁士牙膏" ] } } ] } }