1.nested Object mapping及查询
//mapping中原来是object的地方替代之，就是 nested object了
//nested对象将不被平整化（flatted object fileds），object中的各字段仍保持关联
//平整化会将object中的字段解析成object_name.object_filed_name的形式
PUT [index_name]
{
"mappings":{
"blogpost":{
"properties":{
"comments":{
"type":"nested",
"include_in_parent":true,
"properties":{
"name": {"type":"string" },
"comment": { "type": "string" },
"age": { "type": "short" },
"stars": { "type": "short" },
"date": { "type": "date" }
}
}
}
}
}
}
//nested查询
GET [index_name]/[type_name]/_search
{
"query":{
"bool":{
"must":[
{"match":{"title":"eggs"}},
{
"nested":{
"path":"comments",
"query":{
"bool":{
"must":[
{"match":{"comments.name":"john"}},
{"match":{"comments.age":28}}
]
}
}
}
}
]
}
}
}
进阶：Elasticsearch之Nested(嵌套)系列、es权威指南-嵌套-查询、es权威指南-嵌套-对象（官方文档中文详细解释）
2.父子文档
//建立文档的父子关系要在创建索引的时候在mapping中声明哪个是父文档哪个是子文档。
/创建了一个索引，并制定了2个type和它们之间的父子关系。
PUT [index_name]
{
"mappings": {
"branch": {},
"employee": {
"_parent": {
"type": "branch"
}
}
}
}
//索引子文档要注明爸爸是谁，父文档不用标注儿子是谁
//子文档的每条文档设置parent属性的value为父文档id
PUT [index_name]/company/employee/1?parent=london&pretty
{
"name": "Alice Smith",
"dob": "1970-10-24",
"hobby": "hiking"
}
//通过子文档查父文档
//搜索含有1980年以后出生的employee的branch
GET [index_name]/branch/_search
{
"query": {
"has_child": {
"type": "employee",
"query": {
"range": {
"dob": {
"gte": "1980-01-01"
}
}
}
}
}
}
//搜索最少有两个employee的branch
GET [index_name]/branch/_search
{
"query": {
"has_child": {
"type":"employee",
"min_children": 2,
"query": {
"match_all": {}
}
}
}
}
//通过父文档查子文档
GET [index_name]/employee/_search
{
"query": {
"has_parent": {
"type": "branch",
"query": {
"match": {
"country": "UK"
}
}
}
}
进阶：Elasticsearch索引的父子关系(index parent-child)、Elasticsearch Java API(七)－－多级嵌套搜索（3级）
3.查看热点线程
//查看cpu占用高且执行时间长的Java线程
GET _nodes/_nodes/hot_threads
4.查看集群统计信息
GET _stats
GET _stats?pretty'
5. 禁用all字段
PUT my_index
{
"mappings": {
"type_1": {
"properties": {...}
},
"type_2": {
"_all": {
"enabled": false//禁用
},
"properties": {...}
}
}
}
6. 删除文档
//删除type下所有
DELETE /mytest/test/_query
{
"query": {
"match_all": {}
}
}
//删除指定id文档
DELETE /website/blog/1234
7. 新建mapping
PUT mcms_iflow/_mapping/tbl_iflow_feature
{
"_all": {
"enabled": false
},
"properties": {
"id": {
"type": "string"
},
"tags": {
"type": "string"
},
"title": {
"type": "string"
},
"add_time": {
"type": "long"
}
}
}
8. 新建文档数据
//新增和更新
PUT mcms_iflow/tbl_iflow_feature/11
{
"id": "1",
"tags": "woshi,我是,biaoiqan",
"title": "title标题",
"add_time": "1500000000000"
}
//新增文档，默认自增id
POST mcms_iflow/tbl_iflow_feature
{
"id": "1",
"tags": "woshi,我是,biaoiqan",
"title": "title标题",
"add_time": "1500000000000"
}
