一、参考
二、名词解释
(1) DSL，domain-specific language，领域特定语言
三、基础入门
3.1 索引员工文档
变更:
一个索引下没有多个type， 只有一个_doc的类型
# 索引一个文档
PUT /megacorp/_doc/1
{
"first_name" : "John",
"last_name" : "Smith",
"age" : 25,
"about" : "I love to go rock climbing",
"interests": [ "sports", "music" ]
}
# 返回值
{
"_index" : "megacorp",
"_type" : "_doc",
"_id" : "1",
"_version" : 1,
"result" : "created",
"_shards" : {
"total" : 2,
"successful" : 2,
"failed" : 0
},
"_seq_no" : 0,
"_primary_term" : 1
}
3.2 检索文档
# 检索文档
GET megacorp/_doc/1
# 返回值
{
"_index" : "megacorp",
"_type" : "_doc",
"_id" : "1",
"_version" : 1,
"_seq_no" : 0,
"_primary_term" : 1,
"found" : true,
"_source" : {
"first_name" : "John",
"last_name" : "Smith",
"age" : 25,
"about" : "I love to go rock climbing",
"interests" : [
"sports",
"music"
]
}
}
3.3 短语查询
# 查询语句
GET /megacorp/_search
{
"query": {
"match_phrase": {
"about": "rock climbing"
}
}
}
# 返回值
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : 1.4167401,
"hits" : [
{
"_index" : "megacorp",
"_type" : "_doc",
"_id" : "1",
"_score" : 1.4167401,
"_source" : {
"first_name" : "John",
"last_name" : "Smith",
"age" : 25,
"about" : "I love to go rock climbing",
"interests" : [
"sports",
"music"
]
}
}
]
}
}
3.4 高亮查询
# 高亮查询
GET /megacorp/_search
{
"query": {
"match_phrase": {
"about": "rock climbing"
}
},
"highlight": {
"fields": {
"about": {}
}
}
}
# 返回值
{
"took" : 79,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : 1.4167401,
"hits" : [
{
"_index" : "megacorp",
"_type" : "_doc",
"_id" : "1",
"_score" : 1.4167401,
"_source" : {
"first_name" : "John",
"last_name" : "Smith",
"age" : 25,
"about" : "I love to go rock climbing",
"interests" : [
"sports",
"music"
]
},
"highlight" : {
"about" : [
"I love to go <em>rock</em> <em>climbing</em>"
]
}
}
]
}
}
3.5 分析
# 聚合查询
GET /megacorp/_search
{
"size": 0,
"query": {
"match": {
"last_name": "smith"
}
},
"aggs": {
"all_interests": {
"terms": {
"field": "interests.keyword"
},
"aggs": {
"avg_age": {
"avg": {
"field": "age"
}
}
}
}
}
}
# 返回值
{
"took" : 3,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 2,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"aggregations" : {
"all_interests" : {
"doc_count_error_upper_bound" : 0,
"sum_other_doc_count" : 0,
"buckets" : [
{
"key" : "music",
"doc_count" : 2,
"avg_age" : {
"value" : 28.5
}
},
{
"key" : "sports",
"doc_count" : 1,
"avg_age" : {
"value" : 25.0
}
}
]
}
}
}