• Elastic Search 7.x 学习笔记

    h1. 创建索引

     PUT http://localhost:9200/shopping

    1. {
    2.     "acknowledged": true,
    3.     "shards_acknowledged": true,
    4.     "index": "shopping"
    5. }

     重复创建索引

    1. {
    2.     "error": {
    3.         "root_cause": [
    4.             {
    5.                 "type": "resource_already_exists_exception",
    6.                 "reason": "index [shopping/UgVEWxBdTOWi7DO9TfZUfw] already exists",
    7.                 "index_uuid": "UgVEWxBdTOWi7DO9TfZUfw",
    8.                 "index": "shopping"
    9.             }
    10.         ],
    11.         "type": "resource_already_exists_exception",
    12.         "reason": "index [shopping/UgVEWxBdTOWi7DO9TfZUfw] already exists",
    13.         "index_uuid": "UgVEWxBdTOWi7DO9TfZUfw",
    14.         "index": "shopping"
    15.     },
    16.     "status": 400
    17. }

    2. 查看所有索引

    GET http://localhost:9200/_cat/indices?v    （v代表携带表头）

    1. health status index                                 uuid                   pri rep docs.count docs.deleted store.size pri.store.size
    2. yellow open   holmes_im_message_202207              a3Y4s1kNQj6TNgknOAcZEQ   5   1          0            0      1.2kb          1.2kb
    3. yellow open   shopping                              UgVEWxBdTOWi7DO9TfZUfw   5   1          0            0      1.1kb          1.1kb
    4. yellow open   users                                 RA2vnPmkQhqjegKPcwiYag   5   1          2            0      9.3kb          9.3kb
    5. yellow open   flink_kafka_to_es_user                pYsiaUTfQm6qVtR82dTRIA   5   1         10            0       24kb           24kb
    6. yellow open   my_index                              YzWyj2KrS7-ZBba0tTUa6g   5   1          5            0     13.6kb         13.6kb
    7. yellow open   nba                                   v2yMIG0ZRkCZ54w9KBHXWA   5   1         10            0     40.3kb         40.3kb
    8. yellow open   woodpecker_clue_life_cycle_log_202207 4puKGmyjQJe9zx2VckkC7g   5   1        791            0    577.4kb        577.4kb
    9. green  open   .kibana                               nZWGcHfKTCCtzrmCXdtN1A   1   0          2            0     10.8kb         10.8kb

    3. 删除索引

    DELETE http://localhost:9200/shopping

    4. 创建文档

    POST http://localhost:9200/shopping/_doc （POST不是幂等性，PUT是幂等性，添加数据每次返回ID是唯一标识，所以要用POST）

    1. {
    2.     "title": "小米手机",
    3.     "category": "小米",
    4.     "images": "https://www.baidu.com",
    5.     "price": 3999.00
    6. }

    返回结果

    1. {
    2.     "_index": "shopping",
    3.     "_type": "_doc",
    4.     "_id": "lIuU2IIBp4Wa2GZ3RcL_",
    5.     "_version": 1,
    6.     "result": "created",
    7.     "_shards": {
    8.         "total": 2,
    9.         "successful": 1,
    10.         "failed": 0
    11.     },
    12.     "_seq_no": 0,
    13.     "_primary_term": 1
    14. }

    PUT http://localhost:9200/shopping/_doc/1001 （这里1001指定了ID 所以满足了幂等性，可以用PUT，但是_version会+1）

    1. {
    2.     "_index": "shopping",
    3.     "_type": "_doc",
    4.     "_id": "1001",
    5.     "_version": 1,
    6.     "result": "created",
    7.     "_shards": {
    8.         "total": 2,
    9.         "successful": 1,
    10.         "failed": 0
    11.     },
    12.     "_seq_no": 1,
    13.     "_primary_term": 1
    14. }

    5. 查询文档

    GET http://localhost:9200/shopping/_doc/1001

    1. {
    2.     "_index": "shopping",
    3.     "_type": "_doc",
    4.     "_id": "1001",
    5.     "_version": 2,
    6.     "found": true,
    7.     "_source": {
    8.         "title": "小米手机",
    9.         "category": "小米",
    10.         "images": "https://www.baidu.com",
    11.         "price": 3999.00
    12.     }
    13. }

    6. 查询索引下全部文档

    GET http://localhost:9200/shopping/_search

    1. {
    2.     "took": 178,
    3.     "timed_out": false,
    4.     "_shards": {
    5.         "total": 5,
    6.         "successful": 5,
    7.         "skipped": 0,
    8.         "failed": 0
    9.     },
    10.     "hits": {
    11.         "total": 2,
    12.         "max_score": 1.0,
    13.         "hits": [
    14.             {
    15.                 "_index": "shopping",
    16.                 "_type": "_doc",
    17.                 "_id": "lIuU2IIBp4Wa2GZ3RcL_",
    18.                 "_score": 1.0,
    19.                 "_source": {
    20.                     "title": "小米手机",
    21.                     "category": "小米",
    22.                     "images": "https://www.baidu.com",
    23.                     "price": 3999.00
    24.                 }
    25.             },
    26.             {
    27.                 "_index": "shopping",
    28.                 "_type": "_doc",
    29.                 "_id": "1001",
    30.                 "_score": 1.0,
    31.                 "_source": {
    32.                     "title": "小米手机",
    33.                     "category": "小米",
    34.                     "images": "https://www.baidu.com",
    35.                     "price": 3999.00
    36.                 }
    37.             }
    38.         ]
    39.     }
    40. }

    7. 更新索引文档

    7.1 全量更新

    PUT http://localhost:9200/shopping/_doc/1001

    1. {
    2.     "price": 4999.00
    3. }

    返回结果：别的字段都没有了 ，所以要包含全部的字段和值！

    1. {
    2.     "_index": "shopping",
    3.     "_type": "_doc",
    4.     "_id": "1001",
    5.     "_version": 3,
    6.     "found": true,
    7.     "_source": {
    8.         "price": 4999.00
    9.     }
    10. }

    7.2 局部更新

    POST http://localhost:9200/shopping/_update/1001

    1. {
    2.     "doc":{
    3.         "price": 4999.00
    4.     }
    5. }

    更新后结果：

    1. {
    2.     "_index": "shopping",
    3.     "_type": "_doc",
    4.     "_id": "1001",
    5.     "_version": 2,
    6.     "_seq_no": 1,
    7.     "_primary_term": 1,
    8.     "found": true,
    9.     "_source": {
    10.         "title": "小米手机",
    11.         "category": "小米",
    12.         "images": "https://www.baidu.com",
    13.         "price": 4999.0
    14.     }
    15. }

    8. 删除索引文档

    DELETE  http://localhost:9200/shopping/_doc/1001

    9. 文档查询

    GET http://localhost:9200/shopping/_search?q=category:小米

    GET http://localhost:9200/shopping/_search

    1. {
    2.     "query":{
    3.         "match":{
    4.             "category": "大米"
    5.         }
    6.     }
    7. }

    GET http://localhost:9200/shopping/_search

    1. {
    2.     "query":{
    3.         "match_all":{
    4.         }
    5.     }
    6. }

    10. 分页查询

    GET http://localhost:9200/shopping/_search

    1. {
    2.     "query":{
    3.         "match_all":{
    4.         }
    5.     },
    6.     "from":0,
    7.     "size":3
    8. }

    11. 筛选查询结果字段 排序

    GET http://localhost:9200/shopping/_search

    1. {
    2.     "query":{
    3.         "match_all":{
    4.         }
    5.     },
    6.     "from":0,
    7.     "size":3,
    8.     "_source": ["title","price"],
    9.     "sort": {
    10.         "price":{
    11.             "order": "desc"
    12.         }
    13.     }
    14. }

    12. 查询must or should

    GET http://localhost:9200/shopping/_search

    1. {
    2.     "query":{
    3.         "bool":{
    4.             "should":[
    5.                 {
    6.                     "match":{
    7.                         "category": "小米"
    8.                     }
    9.                 },
    10.                 {
    11.                     "match":{
    12.                         "price": 4999.0
    13.                     }
    14.                 }
    15.             ]
    16.         }
    17.     }
    18. }

    13. 查询 过滤 filter

    GET http://localhost:9200/shopping/_search

    1. {
    2.     "query":{
    3.         "bool":{
    4.             "should":[
    5.                 {
    6.                     "match":{
    7.                         "category": "小米"
    8.                     }
    9.                 },
    10.                 {
    11.                     "match":{
    12.                         "price": 4999.0
    13.                     }
    14.                 }
    15.             ],
    16.             "filter":{
    17.                 "range":{
    18.                     "price":{
    19.                         "gt": 4000
    20.                     }
    21.                 }
    22.             }
    23.         }
    24.     }
    25. }

     14. 查询 match_phrase

    GET http://localhost:9200/shopping/_search

    1. {
    2.     "query":{
    3.         "bool":{
    4.             "should":[
    5.                 {
    6.                     "match_phrase":{
    7.                         "category": "小米"
    8.                     }
    9.                 }
    10.             ]
    11.         }
    12.     }
    13. }

    原理：18.match_phrase的用法 - outback123 - 博客园

     15. 高亮查询

    GET http://localhost:9200/shopping/_search

    1. {
    2.     "query":{
    3.         "bool":{
    4.             "must":[
    5.                 {
    6.                     "match_phrase":{
    7.                         "category": "小米"
    8.                     }
    9.                 }
    10.             ]
    11.         }
    12.     },
    13.     "highlight":{
    14.         "fields":{
    15.             "category": {}
    16.         }
    17.     }
    18. }

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  • 原文地址：https://blog.csdn.net/qq_16397653/article/details/126541369