世界上并没有完美的程序，但是我们并不因此而沮丧，因为写程序就是一个不断追求完美的过程。
问 ：collapse有什么特点？
答 ：
问 ：collapse如何使用？
答 ：
# collapse
PUT /collapse_test
{
"mappings" : {
"properties" : {
"name" : {"type" : "text"},
"user" : {
"properties": {
"id" : {"type" : "integer"},
"age" : {"type" : "integer"}
}
}
}
}
}
# 索引
POST /collapse_test/_doc/1
{
"name" : "hello",
"user" : {
"id" : 1,
"age" : 18
}
}
# 索引
POST /collapse_test/_doc/2
{
"name" : "hello good",
"user" : {
"id" : 2,
"age" : 17
}
}
# 索引
POST /collapse_test/_doc/3
{
"name" : "hello good",
"user" : {
"id" : 3,
"age" : 17
}
}
# 索引
POST /collapse_test/_doc/4
{
"name" : "hello good",
"user" : {
"id" : 4,
"age" : 17
}
}
# 索引
POST /collapse_test/_doc/5
{
"name" : "hello good me",
"user" : {
"id" : 5,
"age" : 19
}
}
# 搜索
GET /collapse_test/_search
{
"query" : {
"match" : {
"name" : "hello"
}
},
"collapse" : {
"field" : "user.id"
}
}
# 结果
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 5,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "1",
"_score" : 0.10938574,
"_source" : {
"name" : "hello",
"user" : {
"id" : 1,
"age" : 18
}
},
"fields" : {
"user.id" : [
1
]
}
},
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "2",
"_score" : 0.08701137,
"_source" : {
"name" : "hello good",
"user" : {
"id" : 2,
"age" : 17
}
},
"fields" : {
"user.id" : [
2
]
}
},
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "3",
"_score" : 0.08701137,
"_source" : {
"name" : "hello good",
"user" : {
"id" : 3,
"age" : 17
}
},
"fields" : {
"user.id" : [
3
]
}
},
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "4",
"_score" : 0.08701137,
"_source" : {
"name" : "hello good",
"user" : {
"id" : 4,
"age" : 17
}
},
"fields" : {
"user.id" : [
4
]
}
},
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "5",
"_score" : 0.07223585,
"_source" : {
"name" : "hello good me",
"user" : {
"id" : 5,
"age" : 19
}
},
"fields" : {
"user.id" : [
5
]
}
}
]
}
}
# 搜索
GET /collapse_test/_search
{
"collapse" : {
"field" : "user.age",
"inner_hits" : [
{
"name" : "most_recent",
"size" : 4,
"sort" : [{"user.id" : "desc"}]
},
{
"name" : "largest_responses",
"size" : 4,
"sort" : [{"user.id" : "asc"}]
}
],
"max_concurrent_group_searches" : 4
},
"sort" : [{"user.id" : "desc"}]
}
# 结果
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 5,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "5",
"_score" : null,
"_source" : {
"name" : "hello good me",
"user" : {
"id" : 5,
"age" : 19
}
},
"fields" : {
"user.age" : [
19
]
},
"sort" : [
5
],
"inner_hits" : {
"most_recent" : {
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "5",
"_score" : null,
"_source" : {
"name" : "hello good me",
"user" : {
"id" : 5,
"age" : 19
}
},
"sort" : [
5
]
}
]
}
},
"largest_responses" : {
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "5",
"_score" : null,
"_source" : {
"name" : "hello good me",
"user" : {
"id" : 5,
"age" : 19
}
},
"sort" : [
5
]
}
]
}
}
}
},
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "4",
"_score" : null,
"_source" : {
"name" : "hello good",
"user" : {
"id" : 4,
"age" : 17
}
},
"fields" : {
"user.age" : [
17
]
},
"sort" : [
4
],
"inner_hits" : {
"most_recent" : {
"hits" : {
"total" : {
"value" : 3,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "4",
"_score" : null,
"_source" : {
"name" : "hello good",
"user" : {
"id" : 4,
"age" : 17
}
},
"sort" : [
4
]
},
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "3",
"_score" : null,
"_source" : {
"name" : "hello good",
"user" : {
"id" : 3,
"age" : 17
}
},
"sort" : [
3
]
},
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "2",
"_score" : null,
"_source" : {
"name" : "hello good",
"user" : {
"id" : 2,
"age" : 17
}
},
"sort" : [
2
]
}
]
}
},
"largest_responses" : {
"hits" : {
"total" : {
"value" : 3,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "2",
"_score" : null,
"_source" : {
"name" : "hello good",
"user" : {
"id" : 2,
"age" : 17
}
},
"sort" : [
2
]
},
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "3",
"_score" : null,
"_source" : {
"name" : "hello good",
"user" : {
"id" : 3,
"age" : 17
}
},
"sort" : [
3
]
},
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "4",
"_score" : null,
"_source" : {
"name" : "hello good",
"user" : {
"id" : 4,
"age" : 17
}
},
"sort" : [
4
]
}
]
}
}
}
},
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "1",
"_score" : null,
"_source" : {
"name" : "hello",
"user" : {
"id" : 1,
"age" : 18
}
},
"fields" : {
"user.age" : [
18
]
},
"sort" : [
1
],
"inner_hits" : {
"most_recent" : {
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "1",
"_score" : null,
"_source" : {
"name" : "hello",
"user" : {
"id" : 1,
"age" : 18
}
},
"sort" : [
1
]
}
]
}
},
"largest_responses" : {
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "1",
"_score" : null,
"_source" : {
"name" : "hello",
"user" : {
"id" : 1,
"age" : 18
}
},
"sort" : [
1
]
}
]
}
}
}
}
]
}
}
# 搜索，二级折叠
GET /collapse_test/_search
{
"collapse" : {
"field" : "user.age",
"inner_hits" : {
"name" : "most_recent",
"size" : 4,
"sort" : [{"user.id" : "desc"}],
"collapse" : {
"field" : "user.id"
}
}
}
}
# 结果
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 5,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "1",
"_score" : 1.0,
"_source" : {
"name" : "hello",
"user" : {
"id" : 1,
"age" : 18
}
},
"fields" : {
"user.age" : [
18
]
},
"inner_hits" : {
"most_recent" : {
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "1",
"_score" : null,
"_source" : {
"name" : "hello",
"user" : {
"id" : 1,
"age" : 18
}
},
"fields" : {
"user.id" : [
1
]
},
"sort" : [
1
]
}
]
}
}
}
},
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "2",
"_score" : 1.0,
"_source" : {
"name" : "hello good",
"user" : {
"id" : 2,
"age" : 17
}
},
"fields" : {
"user.age" : [
17
]
},
"inner_hits" : {
"most_recent" : {
"hits" : {
"total" : {
"value" : 3,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "4",
"_score" : null,
"_source" : {
"name" : "hello good",
"user" : {
"id" : 4,
"age" : 17
}
},
"fields" : {
"user.id" : [
4
]
},
"sort" : [
4
]
},
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "3",
"_score" : null,
"_source" : {
"name" : "hello good",
"user" : {
"id" : 3,
"age" : 17
}
},
"fields" : {
"user.id" : [
3
]
},
"sort" : [
3
]
},
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "2",
"_score" : null,
"_source" : {
"name" : "hello good",
"user" : {
"id" : 2,
"age" : 17
}
},
"fields" : {
"user.id" : [
2
]
},
"sort" : [
2
]
}
]
}
}
}
},
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "5",
"_score" : 1.0,
"_source" : {
"name" : "hello good me",
"user" : {
"id" : 5,
"age" : 19
}
},
"fields" : {
"user.age" : [
19
]
},
"inner_hits" : {
"most_recent" : {
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "collapse_test",
"_type" : "_doc",
"_id" : "5",
"_score" : null,
"_source" : {
"name" : "hello good me",
"user" : {
"id" : 5,
"age" : 19
}
},
"fields" : {
"user.id" : [
5
]
},
"sort" : [
5
]
}
]
}
}
}
}
]
}
}
