doc: update elasticsearch.md (#623)
This commit is contained in:
jaywcjlove
parent
5c34078de5
commit
dd0d19cf1c
@ -3,50 +3,55 @@ Elasticsearch 备忘清单
|
||||
|
||||
这是 [Elasticsearch](https://www.elastic.co/guide/index.html) 的官方文档。 你可以在这里找到 elasticsearch 的所有文档。
|
||||
|
||||
Elasticsearch是一个基于Lucene库的搜索引擎。它提供了一个分布式、支持多租户的全文搜索引擎，具有HTTP Web接口和无模式JSON文档。Elasticsearch是用Java开发的，并作为看源软件发布。官方客户端在Java、.NET（C#）、PHP、Python、Apache Groovy、Ruby和许多其他语言中都是可用的。根据DB-Engines的排名显示，Elasticsearch是最受欢迎的企业搜索引擎，其次是Apache Solr，也是基于Lucene。
|
||||
|
||||
入门
|
||||
----
|
||||
<!--rehype:body-class=cols-2-->
|
||||
---
|
||||
|
||||
### 入门
|
||||
<!--rehype:wrap-class=row-span-2-->
|
||||
|
||||
#### 安装介绍
|
||||
Elasticsearch 是一个基于 Lucene 库的搜索引擎。它提供了一个分布式、支持多租户的全文搜索引擎，具有HTTP Web接口和无模式JSON文档。
|
||||
|
||||
##### 下载
|
||||
#### 下载
|
||||
|
||||
- 注意
|
||||
注意： `${VERSION}` 需替换为指定版本，官方包有的功能只能试用，完整功能需要付费，请仔细阅读官网文档。
|
||||
|
||||
version 需替换为指定版本
|
||||
#### Windows
|
||||
|
||||
官方包有的功能只能试用，完整功能需要付费，请仔细阅读官网文档。
|
||||
```
|
||||
https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${VERSION}-windows-x86_64.zip
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
- windows
|
||||
|
||||
下载地址:
|
||||
|
||||
[https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-\${VERSION}-windows-x86_64.zip](https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${VERSION}-windows-x86_64.zip)
|
||||
|
||||
- linux
|
||||
#### linux
|
||||
|
||||
```shell
|
||||
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${VERSION}-linux-x86_64.tar.gz
|
||||
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${VERSION}-linux-x86_64.tar.gz.sha512
|
||||
shasum -a 512 -c elasticsearch-${VERSION}-linux-x86_64.tar.gz.sha512
|
||||
tar -xzf elasticsearch-${VERSION}-linux-x86_64.tar.gz
|
||||
cd elasticsearch-${VERSION}/
|
||||
```
|
||||
$ wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${VERSION}-linux-x86_64.tar.gz
|
||||
|
||||
- macos
|
||||
$ wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${VERSION}-linux-x86_64.tar.gz.sha512
|
||||
|
||||
$ shasum -a 512 -c elasticsearch-${VERSION}-linux-x86_64.tar.gz.sha512
|
||||
|
||||
$ tar -xzf elasticsearch-${VERSION}-linux-x86_64.tar.gz
|
||||
|
||||
$ cd elasticsearch-${VERSION}/
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
#### macos
|
||||
|
||||
```shell
|
||||
curl -O https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${VERSION}-darwin-x86_64.tar.gz
|
||||
curl https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${VERSION}-darwin-x86_64.tar.gz.sha512 | shasum -a 512 -c -
|
||||
tar -xzf elasticsearch-${VERSION}-darwin-x86_64.tar.gz
|
||||
cd elasticsearch-${VERSION}/
|
||||
```
|
||||
$ curl -O https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${VERSION}-darwin-x86_64.tar.gz
|
||||
|
||||
#### 启动
|
||||
$ curl https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${VERSION}-darwin-x86_64.tar.gz.sha512 | shasum -a 512 -c -
|
||||
|
||||
$ tar -xzf elasticsearch-${VERSION}-darwin-x86_64.tar.gz
|
||||
|
||||
$ cd elasticsearch-${VERSION}/
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
### 启动
|
||||
<!--rehype:wrap-class=col-span-2-->
|
||||
|
||||
- 启动 Elasticsearch
|
||||
|
||||
@ -59,13 +64,15 @@ Elasticsearch是一个基于Lucene库的搜索引擎。它提供了一个分布
|
||||
```shell
|
||||
export ELASTIC_PASSWORD="your_password"
|
||||
```
|
||||
|
||||
- 测试是否启动成功
|
||||
|
||||
```shell
|
||||
curl --cacert $ES_HOME/config/certs/http_ca.crt -u elastic:$ELASTIC_PASSWORD https://localhost:9200
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
成功则返回样例如下:
|
||||
- 成功则返回样例如下:
|
||||
|
||||
```json
|
||||
{
|
||||
@ -86,10 +93,9 @@ Elasticsearch是一个基于Lucene库的搜索引擎。它提供了一个分布
|
||||
"tagline" : "You Know, for Search"
|
||||
}
|
||||
```
|
||||
<!--rehype:className=style-timeline-->
|
||||
|
||||
|
||||
|
||||
### elasticsearch 和 RDMS 的对比
|
||||
### Elasticsearch 和 RDMS 的对比
|
||||
|
||||
| RDMS | elasticsearch |
|
||||
| ----------------------- | ----------------- |
|
||||
@ -103,273 +109,217 @@ Elasticsearch是一个基于Lucene库的搜索引擎。它提供了一个分布
|
||||
| SELECT * FROM tablename | GET http://... |
|
||||
| UPDATE table SET | PUT http://... |
|
||||
| DELETE | DELETE http://... |
|
||||
<!--rehype:className=left-align show-header-->
|
||||
|
||||
操作
|
||||
----
|
||||
---
|
||||
|
||||
说明:
|
||||
|
||||
1. 以 user_info 为索引名称，类比数据库，
|
||||
2. 字段有 id,username,password,nickname,age,info,remark 为例进行演示。
|
||||
|
||||
# DSL语法
|
||||
|
||||
## 基础语法规则
|
||||
|
||||
`curl -X<VERB> '<PROTOCOL>://<HOST>:<PORT>/<PATH>?<QUERY_STRING>' -d '<BODY>'`
|
||||
|
||||
|
||||
- VERB HTTP 方法：GET, POST, PUT, HEAD, DELETE
|
||||
|
||||
- PROTOCOL：http 或者 https 协议（只有在 Elasticsearch 前面有 https 代理的时候可用）
|
||||
|
||||
- HOST：Elasticsearch 集群中的任何一个节点的主机名，如果是在本地的节点，那么就叫 localhost
|
||||
|
||||
- PORT：Elasticsearch HTTP 服务所在的端口，默认为 9200
|
||||
|
||||
- PATH API 路径（例如_count 将返回集群中文档的数量），PATH：可以包含多个组件，例如_cluster/stats 或者_nodes/stats/jvm
|
||||
|
||||
- QUERY_STRING：一些可选的查询请求参数，例如?pretty 参数将使请求返回更加美观易读的 JSON 数据
|
||||
|
||||
- BODY：一个 JSON 格式的请求主体（如果请求需要的话）
|
||||
|
||||
|
||||
|
||||
# 索引的操作
|
||||
|
||||
## 创建索引
|
||||
|
||||
- 统一请求 api 前缀
|
||||
|
||||
http://localhost:9200/
|
||||
|
||||
- DSL语法
|
||||
### 基础语法规则
|
||||
|
||||
```shell
|
||||
$ curl -X<VERB> '<PROTOCOL>://<HOST>:<PORT>/<PATH>?<QUERY_STRING>' -d '<BODY>'
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
- `VERB HTTP` 方法：GET, POST, PUT, HEAD, DELETE
|
||||
- `PROTOCOL`：http 或者 https 协议（只有在 Elasticsearch 前面有 https 代理的时候可用）
|
||||
- `HOST`：Elasticsearch 集群中的任何一个节点的主机名，如果是在本地的节点，那么就叫 localhost
|
||||
- `PORT`：Elasticsearch HTTP 服务所在的端口，默认为 9200
|
||||
- `PATH API 路径`（例如_count 将返回集群中文档的数量），PATH：可以包含多个组件，例如_cluster/stats 或者_nodes/stats/jvm
|
||||
- `QUERY_STRING`：一些可选的查询请求参数，例如?pretty 参数将使请求返回更加美观易读的 JSON 数据
|
||||
- `BODY`：一个 JSON 格式的请求主体（如果请求需要的话）
|
||||
|
||||
### 创建索引
|
||||
<!--rehype:wrap-class=col-span-2 row-span-3-->
|
||||
|
||||
#### 统一请求 api 前缀
|
||||
|
||||
```
|
||||
http://localhost:9200/
|
||||
```
|
||||
|
||||
#### DSL语法
|
||||
|
||||
```json
|
||||
PUT /user_info
|
||||
{
|
||||
"settings": {
|
||||
"number_of_replicas": 1,
|
||||
"number_of_shards": 1
|
||||
},
|
||||
"settings": { "number_of_replicas": 1, "number_of_shards": 1 },
|
||||
"mappings": {
|
||||
"properties": {
|
||||
"id": {
|
||||
"type": "long",
|
||||
"index": true
|
||||
},
|
||||
"username": {
|
||||
"type": "keyword",
|
||||
"index": true
|
||||
},
|
||||
"nickname": {
|
||||
"type": "keyword",
|
||||
"index": true
|
||||
},
|
||||
"password": {
|
||||
"type": "keyword",
|
||||
"index": false
|
||||
},
|
||||
"age": {
|
||||
"type": "integer",
|
||||
"index": true
|
||||
},
|
||||
"info": {
|
||||
"type": "text",
|
||||
"index": true
|
||||
},
|
||||
"remark": {
|
||||
"type": "text",
|
||||
"index": true
|
||||
}
|
||||
"id": { "type": "long", "index": true },
|
||||
"username": { "type": "keyword", "index": true },
|
||||
"nickname": { "type": "keyword", "index": true },
|
||||
"password": { "type": "keyword", "index": false },
|
||||
"age": { "type": "integer", "index": true },
|
||||
"info": { "type": "text", "index": true },
|
||||
"remark": { "type": "text", "index": true }
|
||||
}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
- curl
|
||||
#### curl
|
||||
|
||||
```shell
|
||||
curl -XPUT "http://localhost:9200/user_info" -H 'Content-Type: application/json' -d'{ "settings": { "number_of_replicas": 1, "number_of_shards": 1 }, "mappings": { "properties": { "id": { "type": "long", "index": true }, "username": { "type": "keyword", "index": true }, "nickname": { "type": "keyword", "index": true }, "password": { "type": "keyword", "index": false }, "age": { "type": "integer", "index": true }, "info": { "type": "text", "index": true }, "remark": { "type": "text", "index": true } } } }'
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
- 参数说明：
|
||||
#### 参数说明
|
||||
|
||||
settings：索引信息设置
|
||||
- `settings`: 设置索引的信息
|
||||
- `number_of_shards`: 每个索引的主分片数，一旦索引创建后，无法修改此配置
|
||||
- `number_of_replicas`: 每个主分片的副本数，此配置可随时修改
|
||||
- `mappings`: 索引映射定义
|
||||
- `properties`: 字段定义。使用 JSON 配置，键为字段名称（自定义），值为嵌套 JSON，其中 `type` 指定字段的类型
|
||||
|
||||
number_of_shards：每个索引的主分片数，这个配置在索引创建后不能修改
|
||||
其他参数很多，请参考官网资料
|
||||
|
||||
number_of_replicas：每个主分片的副本数，这个配置可以随时修改。
|
||||
### 删除索引
|
||||
|
||||
mappings：索引映射定义
|
||||
|
||||
properties：字段定义 properties里是json配置，key为字段名称（自定义名称），value是个嵌套json，type是指定字段的类型。
|
||||
|
||||
-- 其他参数很多，请参考官网资料
|
||||
|
||||
## 删除索引
|
||||
|
||||
- DSL语法
|
||||
#### DSL语法
|
||||
|
||||
```http
|
||||
DELETE /user_info
|
||||
```
|
||||
|
||||
- curl
|
||||
#### curl
|
||||
|
||||
```shell
|
||||
curl -XDELETE "http://localhost:9200/user_info"
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
### 判断索引是否存在
|
||||
|
||||
## 判断索引是否存在
|
||||
|
||||
- DSL语法
|
||||
#### DSL语法
|
||||
|
||||
```http
|
||||
# 查看索引是否存在
|
||||
HEAD /user_info
|
||||
```
|
||||
|
||||
- curl
|
||||
#### curl
|
||||
|
||||
```shell
|
||||
# 查看索引是否存在
|
||||
curl -XHEAD "http://localhost:9200/user_info"
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
## 开启/关闭索引
|
||||
### 开启/关闭索引
|
||||
|
||||
- 开启DSL语法
|
||||
#### 开启DSL语法
|
||||
|
||||
```http
|
||||
# 开启索引
|
||||
```shell
|
||||
POST /user_info/_open
|
||||
```
|
||||
|
||||
- curl
|
||||
`curl`
|
||||
|
||||
```shell
|
||||
# 开启索引
|
||||
curl -XPOST "http://localhost:9200/user_info/_open"
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
- 关闭DSL语法
|
||||
#### 关闭 DSL 语法
|
||||
|
||||
```http
|
||||
# 关闭索引
|
||||
```shell
|
||||
POST /user_info/_close
|
||||
```
|
||||
|
||||
- curl
|
||||
`curl`
|
||||
|
||||
```shell
|
||||
# 关闭索引
|
||||
curl -XPOST "http://localhost:9200/user_info/_close"
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
|
||||
|
||||
## 索引的别名
|
||||
### 索引的别名
|
||||
<!--rehype:wrap-class=col-span-2-->
|
||||
|
||||
- 添加别名 DSL 语法
|
||||
|
||||
```http
|
||||
# 添加别名
|
||||
```shell
|
||||
POST /user_info/_alias/user1
|
||||
```
|
||||
|
||||
- 添加别名curl
|
||||
|
||||
```shell
|
||||
# 添加别名
|
||||
curl -XPOST "http://localhost:9200/user_info/_alias/user1"
|
||||
```
|
||||
|
||||
|
||||
- 删除别名DSL语法
|
||||
|
||||
```http
|
||||
# 删除别名
|
||||
```shell
|
||||
DELETE /user_info/_alias/user1
|
||||
```
|
||||
|
||||
- 删除别名curl
|
||||
|
||||
```shell
|
||||
# 删除别名
|
||||
curl -XDELETE "http://localhost:9200/user_info/_alias/user1"
|
||||
```
|
||||
|
||||
- 查看别名DSL语法
|
||||
|
||||
```http
|
||||
# 查看别名
|
||||
```shell
|
||||
GET /_alias/user1
|
||||
```
|
||||
|
||||
|
||||
- 查看别名curl
|
||||
|
||||
```shell
|
||||
# 查看别名
|
||||
curl -XGET "http://localhost:9200/_alias/useraa"
|
||||
```
|
||||
|
||||
## mapping 操作
|
||||
Mapping 操作
|
||||
---
|
||||
|
||||
类似修改数据库中列的操作
|
||||
|
||||
### 查看 mapping
|
||||
|
||||
- DSL语法
|
||||
#### DSL语法
|
||||
|
||||
```http
|
||||
# 查看mapping
|
||||
```shell
|
||||
GET /user_info/_mapping
|
||||
```
|
||||
|
||||
- curl
|
||||
---
|
||||
|
||||
```shell
|
||||
# 查看mapping
|
||||
curl -XGET "http://localhost:9200/user_info/_mapping"
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
### 新增 mapping
|
||||
<!--rehype:wrap-class=col-span-2-->
|
||||
|
||||
- 注意
|
||||
#### DSL语法
|
||||
|
||||
**需要注意的是字段映射只能增加，不能更改删除**
|
||||
|
||||
- DSL语法
|
||||
|
||||
```http
|
||||
# 新增mapping
|
||||
```shell
|
||||
PUT /user_info/_mapping
|
||||
{
|
||||
"properties":{
|
||||
"sex":{
|
||||
"type":"keyword"
|
||||
}
|
||||
"sex":{ "type":"keyword" }
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
- curl
|
||||
---
|
||||
|
||||
```shell
|
||||
# 新增mapping
|
||||
curl -XPUT "http://localhost:9200/user_info/_mapping" -H 'Content-Type: application/json' -d'{ "properties":{ "sex":{ "type":"keyword" } } }'
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
# 文档的操作
|
||||
`注意`: 需要注意的是字段映射只能增加，不能更改删除
|
||||
|
||||
## 添加文档
|
||||
- DSL语法
|
||||
文档的操作
|
||||
---
|
||||
|
||||
```http
|
||||
# 新增一条数据
|
||||
### 添加文档
|
||||
<!--rehype:wrap-class=row-span-2-->
|
||||
|
||||
#### 新增一条数据 - DSL语法
|
||||
|
||||
```shell
|
||||
POST /user_info/_doc/1
|
||||
{
|
||||
"id":1,
|
||||
@ -383,21 +333,21 @@ Elasticsearch是一个基于Lucene库的搜索引擎。它提供了一个分布
|
||||
}
|
||||
```
|
||||
|
||||
- curl
|
||||
---
|
||||
|
||||
```shell
|
||||
# 新增一条数据
|
||||
curl -XPOST "http://localhost:9200/user_info/_doc/1" -H 'Content-Type: application/json' -d'{ "id":1, "username":"username", "password":"123456", "nickname":"nickname", "age":18, "info":"一些个人相关的介绍", "remark":"备注信息", "sex":"男" }'
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
### 查询指定索引的所有文档
|
||||
<!--rehype:wrap-class=row-span-2-->
|
||||
|
||||
## 查询指定索引的所有文档
|
||||
类似数据库中的 `select * from user_info;`
|
||||
|
||||
- 类似数据库中的 `select * from user_info;`
|
||||
#### DSL语法
|
||||
|
||||
- DSL语法
|
||||
|
||||
```http
|
||||
```json
|
||||
GET /user_info/_search
|
||||
{
|
||||
"query": {
|
||||
@ -406,87 +356,75 @@ Elasticsearch是一个基于Lucene库的搜索引擎。它提供了一个分布
|
||||
}
|
||||
```
|
||||
|
||||
- curl
|
||||
---
|
||||
|
||||
```shell
|
||||
curl -XGET "http://localhost:9200/user_info/_search" -H 'Content-Type: application/json' -d'{ "query": { "match_all": {} } }'
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
## 通过 id 查询文档
|
||||
### 通过 id 查询文档
|
||||
|
||||
- 类似数据库中的 `select * from user_info where id = 1;`
|
||||
类似数据库中的 `select * from user_info where id = 1;`
|
||||
|
||||
- DSL语法
|
||||
#### DSL语法
|
||||
|
||||
```http
|
||||
# 通过id查询
|
||||
```shell
|
||||
GET /user_info/_doc/1
|
||||
```
|
||||
|
||||
- curl
|
||||
---
|
||||
|
||||
```shell
|
||||
# 通过id查询
|
||||
curl -XGET "http://localhost:9200/user_info/_doc/1"
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
### 模糊查找
|
||||
|
||||
## 通过条件查询文档
|
||||
类似数据库中的模糊查询 `select * from user_info where info like '%人%';`
|
||||
|
||||
### 精确查找
|
||||
#### DSL语法
|
||||
|
||||
- 类似数据库中的 `select * from user_info where username = 'username';`
|
||||
```json
|
||||
GET /user_info/_search
|
||||
{
|
||||
"query": { "match": { "info": "人" } }
|
||||
}
|
||||
```
|
||||
|
||||
- DSL语法
|
||||
### 通过条件查询文档
|
||||
<!--rehype:wrap-class=col-span-2-->
|
||||
|
||||
```http
|
||||
# 通过条件查询
|
||||
类似数据库中的 `select * from user_info where username = 'username';`
|
||||
|
||||
#### 通过条件查询 - DSL语法
|
||||
|
||||
```json
|
||||
GET /user_info/_search
|
||||
{
|
||||
"query": {
|
||||
"bool": {
|
||||
"must": [
|
||||
{ "term": { "username": "username" } }
|
||||
]
|
||||
"must": [ { "term": { "username": "username" } } ]
|
||||
}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
- curl
|
||||
---
|
||||
|
||||
```shell
|
||||
# 通过条件查询
|
||||
curl -XGET "http://localhost:9200/user_info/_search" -H 'Content-Type: application/json' -d'{ "query": { "bool": { "must": [ { "term": { "username": "username" } } ] } } }'
|
||||
```
|
||||
|
||||
### 模糊查找
|
||||
|
||||
- 类似数据库中的模糊查询 `select * from user_info where info like '%人%';`
|
||||
|
||||
- DSL语法
|
||||
|
||||
```http
|
||||
# 模糊查找
|
||||
GET /user_info/_search
|
||||
{
|
||||
"query": {
|
||||
"match": {
|
||||
"info": "人"
|
||||
}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
### 范围查找
|
||||
|
||||
- 类似数据库中的范围查询 `select * from user_info where age between 18 and 30;`
|
||||
类似数据库中的范围查询 `select * from user_info where age between 18 and 30;`
|
||||
|
||||
- DSL语法
|
||||
#### DSL语法
|
||||
|
||||
```http
|
||||
```json
|
||||
GET /user_info/_search
|
||||
{
|
||||
"query": {
|
||||
@ -500,70 +438,21 @@ Elasticsearch是一个基于Lucene库的搜索引擎。它提供了一个分布
|
||||
}
|
||||
```
|
||||
|
||||
- curl
|
||||
---
|
||||
|
||||
```shell
|
||||
curl -XGET "http://localhost:9200/user_info/_search" -H 'Content-Type: application/json' -d'{ "query": { "range": { "age": { "gt": 18, "lt": 30 } } } }'
|
||||
```
|
||||
|
||||
### limit 查找
|
||||
|
||||
- 类似数据库中的 limit 查询 `select * from user_info limit 10;`
|
||||
|
||||
- DSL语法
|
||||
|
||||
```http
|
||||
GET /user_info/_search
|
||||
{
|
||||
"size": 10,
|
||||
"query": {
|
||||
"match_all": {}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
- curl
|
||||
|
||||
```shell
|
||||
curl -XGET "http://localhost:9200/user_info/_search" -H 'Content-Type: application/json' -d'{ "size": 1, "query": { "match_all": {} } }'
|
||||
```
|
||||
|
||||
### limit offset 查找
|
||||
|
||||
- 类似数据库中的 limit 查询 `select * from user_info limit 0,10;`
|
||||
|
||||
- DSL语法
|
||||
|
||||
```http
|
||||
GET /user_info/_search
|
||||
{
|
||||
"size": 2,
|
||||
"from": 1,
|
||||
"query": {
|
||||
"match_all": {}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
- curl
|
||||
|
||||
```shell
|
||||
curl -XGET "http://localhost:9200/user_info/_search" -H 'Content-Type: application/json' -d'{ "size": 2, "from": 1, "query": { "match_all": {} } }'
|
||||
```
|
||||
|
||||
- 参数说明
|
||||
|
||||
- "size": 10表示我们想要返回的结果数量是10条。
|
||||
- "from": 20表示我们想要从结果集中的第21条记录开始返回（因为偏移是从0开始的）。
|
||||
- "query": `{"match_all": {}}` 是一个匹配所有文档的查询，因为我们没有特定的查询条件，只是想要分页结果。
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
### and 查询
|
||||
<!--rehype:wrap-class=col-span-2-->
|
||||
|
||||
- 类似数据库中的 and 查询 `select * from user_info where age > 18 and sex = '男';`
|
||||
类似数据库中的 and 查询 `select * from user_info where age > 18 and sex = '男';`
|
||||
|
||||
- DSL语法
|
||||
#### DSL语法
|
||||
|
||||
```http
|
||||
```json
|
||||
GET /user_info/_search
|
||||
{
|
||||
"query": {
|
||||
@ -577,35 +466,86 @@ Elasticsearch是一个基于Lucene库的搜索引擎。它提供了一个分布
|
||||
}
|
||||
```
|
||||
|
||||
- curl
|
||||
---
|
||||
|
||||
```shell
|
||||
curl -XGET "http://localhost:9200/user_info/_search" -H 'Content-Type: application/json' -d'{ "query": { "bool": { "must": [ { "range": { "age": { "gt": 17 } } }, { "term": { "sex": "男" } } ] } } }'
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
### or 查询
|
||||
### limit 查找
|
||||
|
||||
- 类似数据库中的 or 查询 `select * from user_info where age > 18 or sex = '男';`
|
||||
类似数据库中的 limit 查询 `select * from user_info limit 10;`
|
||||
|
||||
- DSL语法
|
||||
#### DSL语法
|
||||
|
||||
```json
|
||||
GET /user_info/_search
|
||||
{
|
||||
"size": 10,
|
||||
"query": {
|
||||
"match_all": {}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
```shell
|
||||
curl -XGET "http://localhost:9200/user_info/_search" -H 'Content-Type: application/json' -d'{ "size": 1, "query": { "match_all": {} } }'
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
### limit offset 查找
|
||||
|
||||
类似数据库中的 limit 查询 `select * from user_info limit 0,10;`
|
||||
|
||||
#### DSL语法
|
||||
|
||||
```http
|
||||
GET /user_info/_search
|
||||
{
|
||||
"size": 2,
|
||||
"from": 1,
|
||||
"query": {
|
||||
"match_all": {}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
```shell
|
||||
curl -XGET "http://localhost:9200/user_info/_search" -H 'Content-Type: application/json' -d'{ "size": 2, "from": 1, "query": { "match_all": {} } }'
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
#### 参数说明
|
||||
|
||||
- `size`: 10 表示我们想要返回的结果数量是10条
|
||||
- `from`: 20 表示我们想要从结果集中的第21条记录开始返回（因为偏移是从0开始的）
|
||||
- `query`: `{"match_all": {}}` 是一个匹配所有文档的查询，因为我们没有特定的查询条件，只是想要分页结果
|
||||
|
||||
### or 查询
|
||||
<!--rehype:wrap-class=col-span-2-->
|
||||
|
||||
类似数据库中的 or 查询 `select * from user_info where age > 18 or sex = '男';`
|
||||
|
||||
#### DSL语法
|
||||
|
||||
```json
|
||||
GET /user_info/_search
|
||||
{
|
||||
"query": {
|
||||
"bool": {
|
||||
"should": [
|
||||
{
|
||||
"range": {
|
||||
"age": {
|
||||
"gt": 18
|
||||
}
|
||||
"age": { "gt": 18 }
|
||||
}
|
||||
},
|
||||
{
|
||||
"term": {
|
||||
"sex": "男"
|
||||
}
|
||||
"term": { "sex": "男" }
|
||||
}
|
||||
]
|
||||
}
|
||||
@ -613,53 +553,54 @@ Elasticsearch是一个基于Lucene库的搜索引擎。它提供了一个分布
|
||||
}
|
||||
```
|
||||
|
||||
- curl
|
||||
---
|
||||
|
||||
```shell
|
||||
curl -XGET "http://localhost:9200/user_info/_search" -H 'Content-Type: application/json' -d'{ "query": { "bool": { "should": [ { "range": { "age": { "gt": 18 } } }, { "term": { "sex": "男" } } ] } } }'
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
|
||||
## 删除文档
|
||||
删除文档
|
||||
---
|
||||
|
||||
### 删除指定 id
|
||||
|
||||
- 类似数据库中的 delete 查询 `delete from user_info where id = 3;`
|
||||
类似数据库中的 delete 查询 `delete from user_info where id = 3;`
|
||||
|
||||
- DSL语法
|
||||
#### DSL语法
|
||||
|
||||
```http
|
||||
```shell
|
||||
# 删除文档
|
||||
DELETE /user_info/_doc/3
|
||||
```
|
||||
|
||||
- curl
|
||||
---
|
||||
|
||||
```shell
|
||||
# 删除文档
|
||||
curl -XDELETE "http://localhost:9200/user_info/_doc/3"
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
### 删除指定条件
|
||||
<!--rehype:wrap-class=col-span-2-->
|
||||
|
||||
- 类似数据库中的 delete 查询 `delete from user_info where age > 18;`
|
||||
类似数据库中的 delete 查询 `delete from user_info where age > 18;`
|
||||
|
||||
- DSL语法
|
||||
#### DSL语法
|
||||
|
||||
```http
|
||||
```json
|
||||
POST /user_info/_delete_by_query
|
||||
{
|
||||
"query": {
|
||||
"range": {
|
||||
"age": {
|
||||
"gt": 18
|
||||
}
|
||||
}
|
||||
"range": { "age": { "gt": 18 } }
|
||||
}
|
||||
}
|
||||
```
|
||||
- curl
|
||||
|
||||
---
|
||||
|
||||
```shell
|
||||
curl -XPOST "http://localhost:9200/user_info/_delete_by_query" -H 'Content-Type: application/json' -d'{"query":{"range":{"age":{"gt":18}}}}'
|
||||
```
|
||||
<!--rehype:className=wrap-text-->
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user