Elasticsearch基本命令

curl命令

-XGET一种请求方法

-d 标识以post形式传入参数，写在请求正文里面

?pretty=true 以格式的形式显示结果

curl -XGET http://localhost:9200/_cluster/health?pretty --查询elasticsearch的健康信息
curl -XGET http://localhost:9200/ --查询实例的相关信息
curl -XGET http://localhost:9200/_cluster/nodes/ --得到集群中节点的相关信息
curl -XPOST http://localhost:9200/_cluster/nodes/_shutdown --关闭整个集群
curl -XPOST http://localhost:9200/_cluster/nodes/aaaa/_shutdown --关闭集群中指定节点
curl -XPOST http://localhost:9200/lishuai --创建名为lishuai的索引
curl -XDELETE http://localhost:9200/lishuai --删除名为lishuai的索引

curl -XGET 'http://10.10.110.2:19200/benlaitest/_search?pretty=true' -d '{"query":{"multi_match":{"query":"法国","fields":["firstname","lastname"]}}}' --查询数据（匹配firstname和lastname）

curl http://10.10.110.160:9200/benlaitest/_analyze?analyzer=standard -d 我爱你中国

postman执行请求API:

http://10.10.110.160:9200/_cat/indices?v -- Get请求查看有多少索引

http://10.10.110.160:9200/benlaitest/_analyze?analyzer=standard --查看分词结果

{
  "tokens": [
    {
      "token": "我",
      "start_offset": 0,
      "end_offset": 1,
      "type": "<IDEOGRAPHIC>",
      "position": 0
    },
    {
      "token": "爱",
      "start_offset": 1,
      "end_offset": 2,
      "type": "<IDEOGRAPHIC>",
      "position": 1
    },
    {
      "token": "北",
      "start_offset": 2,
      "end_offset": 3,
      "type": "<IDEOGRAPHIC>",
      "position": 2
    },
    {
      "token": "京",
      "start_offset": 3,
      "end_offset": 4,
      "type": "<IDEOGRAPHIC>",
      "position": 3
    },
    {
      "token": "天",
      "start_offset": 4,
      "end_offset": 5,
      "type": "<IDEOGRAPHIC>",
      "position": 4
    },
    {
      "token": "安",
      "start_offset": 5,
      "end_offset": 6,
      "type": "<IDEOGRAPHIC>",
      "position": 5
    },
    {
      "token": "门",
      "start_offset": 6,
      "end_offset": 7,
      "type": "<IDEOGRAPHIC>",
      "position": 6
    }
  ]
}

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一 DSL查询命令 -基本查询

term 匹配指定的文档单元(匹配的是分词后的词条，假如川普分词后为川和普，那么term匹配川普是无结果的，要用term匹配'川'或者'普')，1 至少匹配1个 2匹配两个：
```
{"terms":{"tag":["a","b"],"mininmum":1}} 
```
match 根据不同的字段选择合适的分析器，一个很智能的查询器，可以通过指定他的参数来控制匹配行文 operator 控制关联的查询条件 and或者or：
```
{"query":{match{"title":{"query":"a b }c","operation":"and"}}}
```
multi_match 与match查询类似，不同的是它可以作用在多个字段上：
```
{"query":{"multi_match":{"query":"a v b","fields":["title","content"]}}}
```

query_string 查询支持lucene的查询语法：

{"query":{"query_string":{"query":"titlename:你好^10 +titlename:哈哈","default_field":"titlename"}}}
{"query":{"query_string":{"query":"你好 中国","fields":["title","name"],"use_dis_max":true}}}

range查询只针对单个字段

{"query":{"range":{"year":{"from":1700,"to":1900}}}}

bool查询，复合查询，可以将无限数目的查询封装在一起

{"query":{"bool":{"must":{"term":{"title":"中国"}},"should":{"term":{"name":"帅"}}}}}

其他查询方式：

boosting查询两个查询封装一起的查询
constant_score 恒定分值查询
indices 针对多个索引进行查询
custom_filter_score custom_boost_factor custom_score

ids

{
  "query": {
    "ids": {
      "type": "product",
      "values": [
        "0001-2020774",
        "0001-2020775"
      ]
    }
  }
}

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prefix 前缀查询
模糊查询
fuzzy 查询相似度查询，消耗cpu
fuzzy_like_zhis 基于模糊串
fuzzy_like_zhis_field
more_like_this
mroe_like_this_field
match_all 匹配所有文档
wildcard 查询通配符查询

二 DSL查询命令 - 范围查询和排序

1 index/product/_search 查询6到11块的商品

{
  "query": {
    "range": {
      "price": {
        "gte": "6",
        "lte": "11"
      }
    }
  }
}

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2 查询0-11块之间的商品，先按照相关性得分降序排列，然后按照价格升序

{
  "query": {
    "range": {
      "price": {
        "gte": "0",
        "lte": "11"
      }
    }
  },
  "sort": [
    {
      "_score": "desc"
    },
    {
      "price": "asc"
    }
  ]
}

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结果：　

三：DSL查询命令 - 过滤器

1）过滤器会先执行查询，然后再对查询文档进行过滤

{
  "query": {
    "field": {
      "title": "中国"
    },
    "filter": {
      "term": {
        "year": 1949
      }
    }
  }
}

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但是先执行过滤，然后对过滤结果进行查询。效率更高：

{
  "filter": {
    "range": {
      "year": {
        "from": 1700,
        "to": 1900
      }
    }
  }
}

{
  "query": {
    "filtered": {
      "field": {
        "title": "中国"
      },
      "filter": {
        "term": {
          "year": 1949
        }
      }
    }
  }
}

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2）exists过滤器只过滤有指定字段的文档相反的 missing

3）script 脚本过滤，过滤得到100年以前的文档：

{
  "filter": {
    "script": {
      "script": "now - doc['year'].value>100",
      "params": {
        "now": 2016
      }
    }
  }
}

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四：DSL查询命令 - 聚合

AGGS

1)针对性别进行分组：

{
  "size": 0,
  "aggs": {
    "agg_sex": {
      "terms": {
        "field": "gender"
      }
    }
  }
}

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结果：

{
  "took": 24,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "failed": 0
  },
  "hits": {
    "total": 6,
    "max_score": 0,
    "hits": [
 
    ]
  },
  "aggregations": {
    "agg_sex": {
      "doc_count_error_upper_bound": 0,
      "sum_other_doc_count": 0,
      "buckets": [
        {
          "key": 1,
          "key_as_string": "true",
          "doc_count": 4
        },
        {
          "key": 0,
          "key_as_string": "false",
          "doc_count": 2
        }
      ]
    }
  }
}

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2)得到最大价格：

{
  "size": 0,
  "aggs": {
    "agg_price": {
      "max": {
        "field": "price"
      }
    }
  }
}

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结果：

{
  "took": 16,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "failed": 0
  },
  "hits": {
    "total": 6,
    "max_score": 0,
    "hits": [
 
    ]
  },
  "aggregations": {
    "agg_price": {
      "value": 20.36
    }
  }
}

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另外还有：　　min，max，sum，avg range，postfilter解决了仅仅过滤搜索结果，但是并不影响聚合结果

五：DSL查询命令 - 统计

faceting

1）query统计：

{"query":{"match_all":{}},"facets":{"my_query_facet":{"query":{"term":{"tags":"person"}}}}}

2）filter统计：my_filter_facet

3）terms统计：返回指定字段中使用最多的词项

4）range统计：ranges_facet_result 统计指定范围的文档数。选取不同的字段进行数据聚合计算，使用 key_field和key_value 前者指定应该对哪个字段取值检查是否属于指定范围，后者指明
应该对那些字段进行聚合计算

5）statistical统计:是的我们可以对一个数值型字段计算统计，得到个数综合平方和均值最小值最大值

{"query":{"match_all":{}},"facets":{"statistical_test":{"statistical":{"field":"price"}}}}

6）terms_stats 统计，过滤统计结果：facet_filter

六：mapping嵌套

mapping:{
  "mappings": {
    "test": {
      "properties": {
        "productname": {
          "type": "string"
        },

        "category": {
          "type": "nested",
          "properties": {

            "category1Sysno": {
              "type": "string",
              "index": "not_analyzed"
            },
            "category2Sysno": {
              "type": "string",
              "index": "not_analyzed"
            },
            "category3Sysno": {
              "type": "string",
              "index": "not_analyzed"
            },
            "category1Souce": {
              "type": "int",
              "index": "not_analyzed"
            },
            "category2Souce": {
              "type": "int",
              "index": "not_analyzed"
            },
            "category3Souce": {
              "type": "int",
              "index": "not_analyzed"
            }

          }
        }
      }
    }
  }
}

//DSL 查询
{
  "query": {
    "nested": {
      "path": "category",
      "query": {
        "bool": {
          "must": [
            {
              "term": {
                "category.category1Sysno": "1"
              }
            }
          ]
        }
      }
    }
  }
}

//注意：在嵌套和父子中，不能根据子文档field进行排序；例如此例中根据category.category1Souce对搜索结果进行排序；
//使用对象数组的方式可以排序，排序语句：

"sort": [
{
"category.category1Souce": "asc"
}

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七：嵌套聚合

查询嵌套文档中onlinecategory.category2Sysno为11的且先按照onlinecategory.category3Souce升序在按照price降序排列
增加 nested_path 和 nested_filter 重复查询条件的原因是：排序发生在查询执行之后查询条件限定了只查询category2Sysno为11的文档，如果排序子句中不加入此条件，排序就是基于所有文档的onlinecategory.category3Souce来排序的，而不仅仅是"onlinecategory.category2Sysno": 11的文档【但是此处是不需要加的因为加不加都是正确的，只做演示，基于范围的筛选加了才有意义】
可以聚合嵌套的文档，同时聚合本身也可以嵌套很多层

聚合结果排序（聚合后，按照每个桶的_count数量排序）

{
  "query": {
    "nested": {
      "path": "onlinecategory",
      "query": {
        "term": {
          "onlinecategory.category2Sysno": "11"
        }
      }
    }
  },
  "sort": [
    {
      "onlinecategory.category3Souce": {
        "order": "desc",
        "mode": "max",
        "nested_path": "onlinecategory",
        "nested_filter": {
          "term": {
            "onlinecategory.category2Sysno": 11
          }
        }
      }
    },
    {
      "price": {
        "order": "asc"
      }
    }
  ],
  "aggs": {
    "size_onlinecategory": {
      "nested": {
        "path": "onlinecategory"
      },
      "aggs": {
        "size_category3Sysno": {
          "terms": {
            "field": "onlinecategory.category3Sysno",
            "order": {
              "_count": "desc"
            }
          }
        },
        "size_category2Sysno": {
          "terms": {
            "field": "onlinecategory.category2Sysno"
          }
        }
      }
    }
  }
}

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嵌套索引创建：定义mapping：

[ElasticsearchType(Name = "product")]
    public class NestProduct
    {
        [String(Store = true, Index = FieldIndexOption.NotAnalyzed)]
        public string Id { get; set; }
        [String(Store = true, Index = FieldIndexOption.Analyzed)]
        public string Name { get; set; }
        [String(Store = true, Index = FieldIndexOption.NotAnalyzed)]
        public string Stock { get; set; }
        [String(Store = true, Index = FieldIndexOption.NotAnalyzed)]
        public string Price { get; set; }
        [Nested(Name ="onlinecategory")] //Path ="onlinecategory" 也可以
        public List<NestCategory> Categorys { get; set; }

    }

    [ElasticsearchType(Name = "category")]
    public class NestCategory
    {
        [String(Store = true, Index = FieldIndexOption.Analyzed)]
        public string Category1Name { get; set; }

        [String(Store = true, Index = FieldIndexOption.NotAnalyzed)]
        public string Category1Sysno { get; set; }

        [String(Store = true, Index = FieldIndexOption.Analyzed)]
        public string Category2Name { get; set; }

        [String(Store = true, Index = FieldIndexOption.NotAnalyzed)]
        public string Category2Sysno { get; set; }

        [String(Store = true, Index = FieldIndexOption.Analyzed)]
        public string Category3Name { get; set; }

        [String(Store = true, Index = FieldIndexOption.NotAnalyzed)]
        public string Category3Sysno { get; set; }

    }

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创建索引：

var decriptior = new CreateIndexDescriptor("nestproduct").Mappings(map => map.Map<NestProduct>(m => m.AutoMap()));
var response = ElasticSearchCommon.GetInstance().GetElasticClient().CreateIndex(decriptior);

嵌套的查询，排序和聚合：

/// <summary>
        /// 嵌套查询
        /// </summary>
        /// <returns></returns>
        public List<NestProduct> NestedSearch()
        {
           //搜索包含车厘子的且中类为12 小类为121的商品

            //嵌套查询条件
            List<QueryContainer> qc = new List<QueryContainer>();            
            qc.Add(new TermQuery { Field = "onlinecategory.category2Sysno", Value = "11" });
            //qc.Add(new TermQuery { Field = "onlinecategory.category3Sysno", Value = "121" });
            NestedQuery nestq = new NestedQuery { Path= "onlinecategory", Query=new BoolQuery() { Must= qc} };
            //非嵌套查询条件
            MatchPhraseQuery matchPhraseQuery = new MatchPhraseQuery { Field = "name", Query = "车厘子" };

            //组合上面的查询条件
            List<QueryContainer> qcall = new List<QueryContainer>();
            qcall.Add(nestq);
            qcall.Add(matchPhraseQuery);
            BoolQuery bq = new BoolQuery() { Must = qcall };

            //使用嵌套字段排序 

            //1 默认情况下，根文档的分数是这些嵌套文档分数的平均值。可以通过设置 score_mode 参数来控制这个得分策略，
            //相关策略有 avg (平均值), max (最大值), sum (加和) 和 none (直接返回 1.0 常数值分数)。
            //2 考虑将查询条件作为 NestedFilter 子句  https://www.elastic.co/guide/cn/elasticsearch/guide/current/nested-sorting.html 
            List<ISort> sortlist = new List<ISort>() ;
            sortlist.Add(new SortField() { Field = "onlinecategory.category3Souce", NestedPath= "onlinecategory",Mode= SortMode.Min, NestedFilter= bq,  Order = SortOrder.Ascending });
            sortlist.Add(new SortField() { Field = "price", Order = SortOrder.Ascending });

            //聚合
            //Dictionary<string, AggregationContainer> container = new Dictionary<string, AggregationContainer>();
            //container.Add
            //聚合嵌套
            NestedAggregation nestedAgg = new NestedAggregation("agg_onlinecategory")
            {
                Path = "onlinecategory",
                Aggregations = new TermsAggregation("agg_oc3sysno")
                {
                    Field = "onlinecategory.category3Sysno",
                    Order = new List<TermsOrder>() { new TermsOrder() { Key = "_count", Order = SortOrder.Descending } }
                }
            };
            //执行搜索
            SearchRequest<NestProduct> searchRequest = new SearchRequest<NestProduct>("nestproduct", "product")
            {
                From = 0,
                Size = 100,
                Query = bq,
                //Sort= sortlist
                Aggregations= nestedAgg

            }; 
            var client = ElasticSearchCommon.GetInstance().GetElasticClient();
            var response = client.Search<NestProduct>(searchRequest);

            //结果处理
            List<NestProduct> prolist = new List<NestProduct>();
            foreach (var i in response.Hits)
            {
                prolist.Add(i.Source);
            }

            //获取聚合信息
            List<NestCategory> nestcat = new List<NestCategory>();
            //获取指定的桶对象
            var buck = response.Aggs.Aggregations["agg_onlinecategory"] as SingleBucketAggregate;
            var termbuck = buck.Aggregations["agg_oc3sysno"] as BucketAggregate;
            foreach (KeyedBucket b in termbuck.Items)
            {
                nestcat.Add(new NestCategory() { Category3Sysno = b.Key });
            }           

            return prolist;
        }

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八： mapping父子

//创建父子类型mapping，在子类型上指定父类型是谁
http://192.168.60.61:29200/qtorder
{
    "mappings": {
        "order": {
            "properties": {
                "sysno": {
                    "type": "string",
                    "index": "not_analyzed"
                },
                "uid": {
                    "type": "string",
                    "index": "not_analyzed"
                },
                "createTime": {
                    "type": "date",
                    "index": "not_analyzed"
                }
            }
        },
        "orderItem": {
            "_parent": { //此处只需要指定父类型是谁即可
                "type": "order"
            },
            "properties": {
                "productname": {
                    "type": "string",
                    "index": "analyzed"
                },
                "productid": {
                    "type": "string",
                    "index": "not_analyzed"
                },
                "ordersysno": {
                    "type": "string",
                    "index": "not_analyzed"
                }
            }
        }
    }
}

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插入嵌套关系的数据，例如一个订单里面有3个商品，那么对象关系是一个订单对象里包含了一个商品列表对象，列表里有3个商品数据；而我们需要创建一个订单类型索引数据为父文档，三个产品类型索引数据为子文档

  public class objmanger
    {
       //sysno为订单号，指定默认id为订单号（唯一的）
        public static List<order> CreateOrder()
        {
            List<order> orders = new List<order>();
            orders.Add(new order { id="1001", createTime="2016-07-01", sysno="1001", uid="u1" });
            orders.Add(new order { id = "1002", createTime = "2016-07-02", sysno = "1002", uid = "u2" });
            return orders;

        }
　　　　　//ordersysno为订单号，对应order对象里的sysno和id
        public static List<orderItem> CreateOrderItem()
        {
            List<orderItem> items = new List<orderItem>();
            items.Add(new orderItem { ordersysno = "1001", productid = "p0011", productname = "产品11" });
            items.Add(new orderItem { ordersysno = "1001", productid = "p0012", productname = "产品12" });
            items.Add(new orderItem { ordersysno = "1001", productid = "p0013", productname = "产品13" });
            items.Add(new orderItem { ordersysno = "1002", productid = "p0014", productname = "产品14" });
            items.Add(new orderItem { ordersysno = "1002", productid = "p0015", productname = "产品15" });
            items.Add(new orderItem { ordersysno = "1002", productid = "p0016", productname = "产品16" });
            return items;
        
        }
    }

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插入数据

  public static void createparent()
        {
            var client = ElasticSearchCommon.GetInstance().GetElasticClient();
            var des = new BulkDescriptor().Index("qtorder");
            var orders = objmanger.CreateOrder();
            foreach (var i in orders)
            {
                des.Index<order>(o => o.Document(i));
            }
            var response = client.Bulk(des);
        }

        public static void createchild()
        {
            var client = ElasticSearchCommon.GetInstance().GetElasticClient();
            var des = new BulkDescriptor().Index("qtorder");
            var items = objmanger.CreateOrderItem();
            foreach (var i in items)
            {
                des.Type("orderItem").Index<orderItem>(o => o.Document(i).Parent(i.ordersysno));
            }
            var response2 = client.Bulk(des);
             
            //foreach(var i in items)
            //{
            //    var request = new IndexRequest<orderItem>("qtorder", "orderItem", i.productid);
            //    request.Document = i;
            //    request.Parent=i.orderid;
            //    var respon= client.Index(request);
            //}
                
        
        }

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查询

查询子文档商品名称包含 “产品” 的父文档订单信息（只返回父文档信息）：
post    http://192.168.60.61:29200/qtorder/order/_search

{
 "query":{
"has_child": {                
      "type": "orderItem",         
      "query": {               
        "match": {
          "productname": "产品"
        }
      }
    }     }                     
}


返回结果：
{
  "took": 8,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "failed": 0
  },
  "hits": {
    "total": 2,
    "max_score": 1,
    "hits": [
      {
        "_index": "qtorder",
        "_type": "order",
        "_id": "1001",
        "_score": 1,
        "_source": {
          "id": "1001",
          "ordersysno": "1001",
          "uid": "u1",
          "createTime": "2016-07-01"
        }
      },
      {
        "_index": "qtorder",
        "_type": "order",
        "_id": "1002",
        "_score": 1,
        "_source": {
          "id": "1002",
          "ordersysno": "1002",
          "uid": "u2",
          "createTime": "2016-07-02"
        }
      }
    ]
  }
}

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　　查询用户u1买过的所有商品，（根据父文档条件查询子文档信息，只返回子文档信息），注意，下面orderid就是上面的ordersysno，忘改：

nest代码

/// <summary>
        /// 嵌套查询 
        /// 使用嵌套在一些情况下不用聚合就能得到结果
        /// </summary>
        public static void query()
        { 
             var client = ElasticSearchCommon.GetInstance().GetElasticClient();
             //TypeName [] ts = new TypeName[] { "order"};             
             var result = client.Search<order>(s => s
                 .Index("qtorder")
                 .Type("order")
                 //.Query(q => q.Term("uid", "u1"))
                 //.Query(q => q.HasChild<orderItem>(c => c.Type("orderItem").Query(cq => cq.Term("productid", "p0011"))))//查询买过商品p0011的 订单
                 .Query(q => q.HasChild<orderItem>(c => c.Type("orderItem").Query(cq => cq.Match(o => o.Name("productname").Query("苹果")))))//查询子文档商品名称包含苹果的父文档信息
                 );
             IEnumerable<order> ss = result.Documents;
        }

View Code

//多个文档类型查询 
public static void query()
        { 
             var client = ElasticSearchCommon.GetInstance().GetElasticClient();
             TypeName[] ts = new TypeName[] { "order", "giftOrder" };             
             var result = client.Search<order>(s => s
                 .Index("qtorder")
                 .Type(ts)
                 //.Query(q => q.HasChild<orderItem>(c => c.Type("orderItem").Query(cq => cq.Term("productid", "p0011"))))//查询买过商品p0011的 订单
                 .Query(q => q.HasChild<orderItem>(c => c
                     .Type("orderItem").Query(cq => cq.Match(o => o.Name("productname").Query("产品")))
                     .Type("giftOrderItem").Query(cq => cq.Match(o => o.Name("productname").Query("产品")))
                     ))//查询子文档商品名称包含苹果的父文档信息
                 );
             IEnumerable<order> ss = result.Documents;
        }

View Code

es 支持文档嵌套和父子文档，文档嵌套式内容嵌套，一个大文档里面包含多个小文档；父子文档是指为两个独立的文档类型建立父子关联关系；

父子文档查询时也支持多个类型查询

文档id:同一文档类型下，文档id不能重复，同一索引不同类型下的两个文档id可以是相同的

//查询订单内容包含“礼金”，且用户是2340458的订单号，父子条件同时查询
http://192.168.60.61:29200/order20160801/giftOrder/_search
{
    "query": {
        "bool": {
            "must": [
                {
                    "term": {
                        "uid": "2340458"
                    }
                },
                {
                    "has_child": {
                        "type": "giftOrderProduct",
                        "query": {
                            "term": {
                                "productName": "礼金"
                            }
                        }
                    }
                }
            ]
        }
    }
}

View Code

//查询根据多个子类型信息，已经父类型信息，查询多个父类型。查询用户23130购买过包含“电子“的商品的订单（包含普通订单和礼品卡订单）
http://192.168.60.61:29200/order20160801/giftOrder,order/_search
{
    "from":0,
    "size":100,
    "query": {
        "bool":{"should":[
        {"bool":{"must":[{"term": {"uid": "23130"}}, { "has_child": {"type": "giftOrderProduct","query": {"term": {"productName": "电子"}}}}]}},
        {"bool":{"must":[{"term": {"uid": "23130"}}, { "has_child": {"type": "orderProduct","query": {"term": {"productName": "电子"}}}}]}}
        ]}
    }
}

View Code

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原文地址：https://www.cnblogs.com/shaner/p/5661071.html