1、query string search
搜索全部商品：
ES 7.X 的命令
GET /ecommerce/_search
- took：耗费了几毫秒
- timed_out：是否超时，这里是没有
- _shards：数据拆成了5个分片，所以对于搜索请求，会打到所有的primary shard（或者是它的某个replica shard也可以）
- hits.total：查询结果的数量，3个document
- hits.max_score：score的含义，就是document对于一个search的相关度的匹配分数，越相关，就越匹配，分数也高
- hits.hits：包含了匹配搜索的document的详细数据
结果：
{
"took" : 3,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 4,
"relation" : "eq"
},
"max_score" : 1.0,
"hits" : [
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "4",
"_score" : 1.0,
"_source" : {
"name" : "shudashi yagao",
"desc" : "caoben zhiwu",
"price" : 50,
"producer" : "shudashi yagao producer",
"tags" : [
"meibai",
"qingxin"
]
}
},
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "3",
"_score" : 1.0,
"_source" : {
"name" : "zhonghua yagao",
"desc" : "caoben zhiwu",
"price" : 40,
"producer" : "zhonghua producer",
"tags" : [
"qingxin"
]
}
},
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "2",
"_score" : 1.0,
"_source" : {
"name" : "jiajieshi yagao",
"desc" : "youxiao fangzhu",
"price" : 25,
"producer" : "jiajieshi producer",
"tags" : [
"fangzhu"
]
}
},
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "1",
"_score" : 1.0,
"_source" : {
"name" : "jiaqiangban gaolujie yagao",
"desc" : "gaoxiao meibai",
"price" : 30,
"producer" : "gaolujie producer",
"tags" : [
"meibai",
"fangzhu"
]
}
}
]
}
}
query string search 的由来，因为search参数都是以http请求的query string来附带的
搜索商品名称中包含yagao的商品，而且按照售价降序排序：
ES 7.X 的命令:
GET /ecommerce/_search?q=name:yagao&sort=price:desc
结果：
{
"took" : 32,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 4,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "4",
"_score" : null,
"_source" : {
"name" : "shudashi yagao",
"desc" : "caoben zhiwu",
"price" : 50,
"producer" : "shudashi yagao producer",
"tags" : [
"meibai",
"qingxin"
]
},
"sort" : [
50
]
},
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "3",
"_score" : null,
"_source" : {
"name" : "zhonghua yagao",
"desc" : "caoben zhiwu",
"price" : 40,
"producer" : "zhonghua producer",
"tags" : [
"qingxin"
]
},
"sort" : [
40
]
},
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "1",
"_score" : null,
"_source" : {
"name" : "jiaqiangban gaolujie yagao",
"desc" : "gaoxiao meibai",
"price" : 30,
"producer" : "gaolujie producer",
"tags" : [
"meibai",
"fangzhu"
]
},
"sort" : [
30
]
},
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "2",
"_score" : null,
"_source" : {
"name" : "jiajieshi yagao",
"desc" : "youxiao fangzhu",
"price" : 25,
"producer" : "jiajieshi producer",
"tags" : [
"fangzhu"
]
},
"sort" : [
25
]
}
]
}
}
适用于临时的在命令行使用一些工具，比如curl，快速的发出请求，来检索想要的信息；但是如果查询请求很复杂，是很难去构建的
在生产环境中，几乎很少使用query string search
2、query DSL
DSL：Domain Specified Language，特定领域的语言
http request body：请求体，可以用json的格式来构建查询语法，比较方便，可以构建各种复杂的语法，比query string search肯定强大多了
查询所有的商品
ES 7.X 的命令:
GET /ecommerce/_search
{
"query":{
"match_all": {}
}
}
结果：
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 4,
"relation" : "eq"
},
"max_score" : 1.0,
"hits" : [
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "4",
"_score" : 1.0,
"_source" : {
"name" : "shudashi yagao",
"desc" : "caoben zhiwu",
"price" : 50,
"producer" : "shudashi yagao producer",
"tags" : [
"meibai",
"qingxin"
]
}
},
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "3",
"_score" : 1.0,
"_source" : {
"name" : "zhonghua yagao",
"desc" : "caoben zhiwu",
"price" : 40,
"producer" : "zhonghua producer",
"tags" : [
"qingxin"
]
}
},
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "2",
"_score" : 1.0,
"_source" : {
"name" : "jiajieshi yagao",
"desc" : "youxiao fangzhu",
"price" : 25,
"producer" : "jiajieshi producer",
"tags" : [
"fangzhu"
]
}
},
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "1",
"_score" : 1.0,
"_source" : {
"name" : "jiaqiangban gaolujie yagao",
"desc" : "gaoxiao meibai",
"price" : 30,
"producer" : "gaolujie producer",
"tags" : [
"meibai",
"fangzhu"
]
}
}
]
}
}
查询名称包含yagao的商品，同时按照价格降序排序
GET /ecommerce/_search
{
"query":{
"match": {
"name": "yagao"
}
},
"sort": [
{
"price": {
"order": "desc"
}
}
]
}
分页查询商品，总共3条商品，假设每页就显示1条商品，现在显示第2页，所以就查出来第2个商品
GET /ecommerce/_search
{
"query":{
"match_all": {}
},
"from": 0,
"size": 2
}
指定要查询出来商品的名称和价格就可以
GET /ecommerce/_search
{
"query":{
"match_all": {}
},
"_source": ["name", "price"]
}
更加适合生产环境的使用，可以构建复杂的查询
3、query filter
搜索商品名称包含yagao，而且售价大于25元的商品
GET /ecommerce/_search
{
"query":{
"bool": {
"must": [
{
"match": {
"name": "yagao"
}
}
],
"filter": {
"range": {
"price": {
"gte": 30 # gte 大于等于
}
}
}
}
}
}
4、full-text search（全文检索）
GET /ecommerce/_search
{
"query":{
"match": {
"producer": "yagao"
}
}
}
producer这个字段，会先被拆解，建立倒排索引
special 4
yagao 4
producer 1,2,3,4
gaolujie 1
zhognhua 3
jiajieshi 2
yagao producer ---> yagao和producer
{
"took": 4,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 4,
"max_score": 0.70293105,
"hits": [
{
"_index": "ecommerce",
"_type": "product",
"_id": "4",
"_score": 0.70293105,
"_source": {
"name": "special yagao",
"desc": "special meibai",
"price": 50,
"producer": "special yagao producer",
"tags": [
"meibai"
]
}
},
{
"_index": "ecommerce",
"_type": "product",
"_id": "1",
"_score": 0.25811607,
"_source": {
"name": "gaolujie yagao",
"desc": "gaoxiao meibai",
"price": 30,
"producer": "gaolujie producer",
"tags": [
"meibai",
"fangzhu"
]
}
},
{
"_index": "ecommerce",
"_type": "product",
"_id": "3",
"_score": 0.25811607,
"_source": {
"name": "zhonghua yagao",
"desc": "caoben zhiwu",
"price": 40,
"producer": "zhonghua producer",
"tags": [
"qingxin"
]
}
},
{
"_index": "ecommerce",
"_type": "product",
"_id": "2",
"_score": 0.1805489,
"_source": {
"name": "jiajieshi yagao",
"desc": "youxiao fangzhu",
"price": 25,
"producer": "jiajieshi producer",
"tags": [
"fangzhu"
]
}
}
]
}
}
5、phrase search（短语搜索）
跟全文检索相对应，相反，全文检索会将输入的搜索串拆解开来，去倒排索引里面去一一匹配，只要能匹配上任意一个拆解后的单词，就可以作为结果返回
phrase search，要求输入的搜索串，必须在指定的字段文本中，完全包含一模一样的，才可以算匹配，才能作为结果返回
ES7.X 命令：
GET /ecommerce/_search
{
"query":{
"match_phrase": {
"producer": "yagao producer"
}
}
}
结果：
{
"took" : 10,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : 1.2825179,
"hits" : [
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "4",
"_score" : 1.2825179,
"_source" : {
"name" : "shudashi yagao",
"desc" : "caoben zhiwu",
"price" : 50,
"producer" : "shudashi yagao producer",
"tags" : [
"meibai",
"qingxin"
]
}
}
]
}
}
6、highlight search（高亮搜索结果）
ES7.X 命令：
GET /ecommerce/_search
{
"query":{
"match": {
"producer": "producer"
}
},
"highlight": {
"fields": {
"producer": {}
}
}
}
结果：
{
"took" : 32,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 4,
"relation" : "eq"
},
"max_score" : 0.09037233,
"hits" : [
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "3",
"_score" : 0.09037233,
"_source" : {
"name" : "zhonghua yagao",
"desc" : "caoben zhiwu",
"price" : 40,
"producer" : "zhonghua producer",
"tags" : [
"qingxin"
]
},
"highlight" : {
"producer" : [
"zhonghua <em>producer</em>"
]
}
},
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "2",
"_score" : 0.09037233,
"_source" : {
"name" : "jiajieshi yagao",
"desc" : "youxiao fangzhu",
"price" : 25,
"producer" : "jiajieshi producer",
"tags" : [
"fangzhu"
]
},
"highlight" : {
"producer" : [
"jiajieshi <em>producer</em>"
]
}
},
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "1",
"_score" : 0.09037233,
"_source" : {
"name" : "jiaqiangban gaolujie yagao",
"desc" : "gaoxiao meibai",
"price" : 30,
"producer" : "gaolujie producer",
"tags" : [
"meibai",
"fangzhu"
]
},
"highlight" : {
"producer" : [
"gaolujie <em>producer</em>"
]
}
},
{
"_index" : "ecommerce",
"_type" : "product",
"_id" : "4",
"_score" : 0.07574371,
"_source" : {
"name" : "shudashi yagao",
"desc" : "caoben zhiwu",
"price" : 50,
"producer" : "shudashi yagao producer",
"tags" : [
"meibai",
"qingxin"
]
},
"highlight" : {
"producer" : [
"shudashi yagao <em>producer</em>"
]
}
}
]
}
}
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