elasticsearch(4)查询DSL

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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": [
            "<em>高</em><em>露</em><em>洁</em>牙膏"
          ]
        }
      },
      {
        "_index": "ecommerce",
        "_type": "product",
        "_id": "1",
        "_score": 0.2876821,
        "_source": {
          "name": "佳洁士牙膏",
          "price": 30
        },
        "highlight": {
          "name": [
            "佳<em>洁</em>士牙膏"
          ]
        }
      }
    ]
  }
}