Elasticsearch高级操作 (查询所有文档)
Elasticsearch提供了基于JSON提供完整的查询DSL来定义查询定义数据 :根据前几节方式来定义数据,定义student的索引,文档分别为_doc 1001 —— ·1005# POST /student/_doc/1001{"name":"zhangsan","nickname":"zhangsan","sex":"男","age":30}# POST /student/_doc/10
·
Elasticsearch提供了基于JSON提供完整的查询DSL来定义查询
定义数据 :
根据前几节方式来定义数据,定义student的索引,文档分别为_doc 1001 —— ·1005
# POST /student/_doc/1001
{
"name":"zhangsan",
"nickname":"zhangsan",
"sex":"男",
"age":30
}
# POST /student/_doc/1002
{
"name":"lisi",
"nickname":"lisi",
"sex":"男",
"age":20
}
# POST /student/_doc/1003
{
"name":"wangwu",
"nickname":"wangwu",
"sex":"女",
"age":40
}
# POST /student/_doc/1004
{
"name":"zhangsan1",
"nickname":"zhangsan1",
"sex":"女",
"age":50
}
# POST /student/_doc/1005
{
"name":"zhangsan2",
"nickname":"zhangsan2",
"sex":"女",
"age":30
}
查询所有文档
在 Postman中,向ES服务器发GET请求 :http://127.0.0.1:9200/student/_search
{
"query": {
"match_all": {}
}
}
# "query":这里的query代表一个查询对象,里面可以有不同的查询属性
# "match_all":查询类型,例如:match_all(代表查询所有), match,term , range 等等
# {查询条件}:查询条件会根据类型的不同,写法也有差异
服务器响应结果如下
{
"took【查询花费时间,单位毫秒】" : 6,
"timed_out【是否超时】" : false,
"_shards【分片信息】" : {
"total【总数】" : 1,
"successful【成功】" : 1,
"skipped【忽略】" : 0,
"failed【失败】" : 0
},
"hits【搜索命中结果】" : {
"total"【搜索条件匹配的文档总数】: {
"value"【总命中计数的值】: 3,
"relation"【计数规则】: "eq" # eq 表示计数准确, gte表示计数不准确
},
"max_score【匹配度分值】" : 1.0,
"hits【命中结果集合】" : [
。。。
}
]
}
}
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