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搜索[Elasticsearch],共4110篇文章
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elasticsearch 经纬度查询

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 curl-XPUT "http://localhost:9200/shop/" -d'{ "mappings" :{ "shop" :{ "properties" :{ "name" :{ "type" : "string" }, "location" :{ "type" : "geo_point" , //经纬度类型 "lat_lon" : true , "fielddata" :{ "format" : "compressed" , //压缩模式,节省内存 "precision" : "3m" } } } } } }'; curl-XPUThttp: //localhost:9200/shop/shop/1-d' { "name" : "北京" , "location" : "39.9047253699,116.4072154982" } '; curl-XPUThttp: //localhost:9200/shop/shop/2-d' { "name" : "顺义" , "location" : "40.1299127031,116.6569478577" } '; curl-XPUThttp: //localhost:9200/shop/shop/3-d' { "name" : "天津" , "location" : "39.0850853357,117.1993482089" } '; curl-XPUThttp: //localhost:9200/shop/shop/4-d' { "name" : "上海" , "location" : "31.2304324029,121.4737919321" } '; curl-XGET "http://localhost:9200/shop/shop/_search?pretty" -d'{ "query" :{ "filtered" :{ "filter" :{ "geo_distance" :{ "distance" : "28km" , "type" : "indexed" , "distance_type" : "sloppy_arc" , "location" :{ "lat" : 39.9682060617 , "lon" : 116.4107280170 } } } } }, "sort" :[ //按距离排序 { "_geo_distance" :{ "location" :{ "lat" : 39.9682060617 , "lon" : 116.4107280170 }, "order" : "asc" , "unit" : "km" , "distance_type" : "sloppy_arc" //推荐适应此模式plane不准,精度太差 } } ] }' 再举一个更加实际的例子 curl-XGET "http://localhost:9200/shop/shop/_search?pretty" -d'{ "query" :{ "function_score" :{ "query" :{ "bool" :{ "filter" :{ "geo_distance" :{ "distance" : "28km" , "type" : "indexed" , "distance_type" : "sloppy_arc" , "location" :{ "lat" : 39.9682060617 , "lon" : 116.4107280170 } } } } }, "functions" :[{ "script_score" :{ "script" :{ "inline" : "return0" } } },{ "gauss" :{ //按举例远近打分 "location" :{ "origin" : "39.9682060617,116.4107280170" , "scale" : "5km" , "offset" : "0" , "decay" : 0.5 } }, "weight" : "1" }], "score_mode" : "sum" , "boost_mode" : "replace" } } }' 此时你会看到北京的得分是 0.25 分,因为差 5 公里,衰减 0.5 ,北京距此坐标 7 公里,所以取值 0.25 . 2.3 版本的mapping可以写成 curl-XPUT "http://localhost:9200/shop/" -d'{ "mappings" :{ "shop" :{ "properties" :{ "name" :{ "type" : "string" }, "location" :{ "type" : "geo_point" , "lat_lon" : true , //倒排索引 "geohash" : true , "geohash_prefix" : true , "geohash_precision" : "50m" } } } } }'; 其实它还支持多个地址,例如 curl-XPUThttp: //localhost:9200/ext-shop/ext-shop/5-d' { "name" : "京津冀" , "location" :[[ 116.4072154982 , 39.9047253699 ],[ 116.6569478577 , 40.1299127031 ]]} '; 佩服ES的强大 本文转自whk66668888 51CTO博客,原文链接:http://blog.51cto.com/12597095/2048249

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elasticsearch 关联查询对比

两种方式 嵌套和父子关联 Nested Nested docs are stored in the same Lucene block as each other, which helps read/query performance. Reading a nested doc is faster than the equivalent parent/child. Updating a single field in a nested document (parent or nested children) forces ES to reindex the entire nested document. This can be very expensive for large nested docs "Cross referencing" nested documents is impossible Best suited for data that does not change frequently Parent/Child Children are stored separately from the parent, but are routed to the same shard. So parent/children are slightly less performance on read/query than nested Parent/child mappings have a bit extra memory overhead, since ES maintains a "join" list in memory Updating a child doc does not affect the parent or any other children, which can potentially save a lot of indexing on large docs Sorting/scoring can be difficult with Parent/Child since the Has Child/Has Parent operations can be opaque at times 综上所述,两种方式均有利弊,官方建议,自己处理关联关系,减轻ES的压力。 本文转自whk66668888 51CTO博客,原文链接:http://blog.51cto.com/12597095/1904058

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elasticsearch 自定义打分

curl -XGET 'http://localhost:9200/searchsuggestion/searchsuggestion/_search?pretty' -d '{ "fields" : ["company_full_name","id"], "size" : 10, "query": { "function_score": { "functions": [ { "filter": { "term": { "pinyin_name": "bx" } }, "weight": 100 }, { "filter": { "term": { "blurry": "bx" } }, "weight": 10 }, { "field_value_factor" : { "field" : "frequency", "factor" : 0.1, "modifier" : "ln" } } ], "score_mode": "sum" } } }' 解释 score=pinyin_name*100+blurry*10+ln(0.1*frequency) 本文转自whk66668888 51CTO博客,原文链接:http://blog.51cto.com/12597095/1903763

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