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 ：rescore有什么特点？
答 ：
问 ：rescore如何使用？
答 ：
# rescore
PUT /rescore_test
{
"mappings" : {
"properties" : {
"name" : {"type" : "text"}
}
}
}
# 索引
POST /rescore_test/_doc/1
{
"name" : "hello good",
"count" : 10
}
# 索引
POST /rescore_test/_doc/2
{
"name" : "hello hello good",
"count" : 15
}
# 索引
POST /rescore_test/_doc/3
{
"name" : "hello hello hello good me",
"count" : 20
}
# rescore 搜索
# 在query搜索的基础上进行rescore的match_phrase的搜索
GET /rescore_test/_search
{
"query" : {
"match" : {
"name" : "hello good"
}
},
"rescore" : {
"query" : {
"rescore_query" : {
"match_phrase" : {
"name" : {
"query" : "hello hello good",
"slop" : 2
}
}
}
},
"window_size" : 50
}
}
# 结果
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 3,
"relation" : "eq"
},
"max_score" : 0.7458272,
"hits" : [
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "2",
"_score" : 0.7458272,
"_source" : {
"name" : "hello hello good",
"count" : 15
}
},
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "3",
"_score" : 0.72005475,
"_source" : {
"name" : "hello hello hello good me",
"count" : 20
}
},
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "1",
"_score" : 0.31931415,
"_source" : {
"name" : "hello good",
"count" : 10
}
}
]
}
}
# rescore 搜索
# resocre 搜索时对query和rescore搜索分别加权
GET /rescore_test/_search
{
"query" : {
"match" : {
"name" : "hello good"
}
},
"rescore" : {
"query" : {
"rescore_query" : {
"match_phrase" : {
"name" : {
"query" : "hello hello good",
"slop" : 2
}
}
},
"query_weight" : 1,
"rescore_query_weight" : 2
},
"window_size" : 50
}
}
# 结果
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 3,
"relation" : "eq"
},
"max_score" : 1.1635083,
"hits" : [
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "2",
"_score" : 1.1635083,
"_source" : {
"name" : "hello hello good",
"count" : 15
}
},
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "3",
"_score" : 1.1397249,
"_source" : {
"name" : "hello hello hello good me",
"count" : 20
}
},
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "1",
"_score" : 0.31931415,
"_source" : {
"name" : "hello good",
"count" : 10
}
}
]
}
}
# rescore 搜索
# resocre 搜索时对query和rescore搜索分别加权
# 结果评分求积
GET /rescore_test/_search
{
"query" : {
"match" : {
"name" : "hello good"
}
},
"rescore" : {
"query" : {
"rescore_query" : {
"match_phrase" : {
"name" : {
"query" : "hello hello good",
"slop" : 2
}
}
},
"query_weight" : 1,
"rescore_query_weight" : 2,
"score_mode" : "multiply"
},
"window_size" : 50
}
}
# 结果
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 3,
"relation" : "eq"
},
"max_score" : 0.31931415,
"hits" : [
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "1",
"_score" : 0.31931415,
"_source" : {
"name" : "hello good",
"count" : 10
}
},
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "2",
"_score" : 0.2741208,
"_source" : {
"name" : "hello hello good",
"count" : 15
}
},
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "3",
"_score" : 0.2521249,
"_source" : {
"name" : "hello hello hello good me",
"count" : 20
}
}
]
}
}
# rescore 搜索
# resocre 搜索时对query和rescore搜索分别加权
# 结果评分求平均值
GET /rescore_test/_search
{
"query" : {
"match" : {
"name" : "hello good"
}
},
"rescore" : {
"query" : {
"rescore_query" : {
"match_phrase" : {
"name" : {
"query" : "hello hello good",
"slop" : 2
}
}
},
"query_weight" : 1,
"rescore_query_weight" : 2,
"score_mode" : "avg"
},
"window_size" : 50
}
}
# 结果
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 3,
"relation" : "eq"
},
"max_score" : 0.58175415,
"hits" : [
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "2",
"_score" : 0.58175415,
"_source" : {
"name" : "hello hello good",
"count" : 15
}
},
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "3",
"_score" : 0.5698624,
"_source" : {
"name" : "hello hello hello good me",
"count" : 20
}
},
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "1",
"_score" : 0.31931415,
"_source" : {
"name" : "hello good",
"count" : 10
}
}
]
}
}
# rescore 搜索
# resocre 搜索时对query和rescore搜索分别加权
# 结果评分取最大值
GET /rescore_test/_search
{
"query" : {
"match" : {
"name" : "hello good"
}
},
"rescore" : {
"query" : {
"rescore_query" : {
"match_phrase" : {
"name" : {
"query" : "hello hello good",
"slop" : 2
}
}
},
"query_weight" : 1,
"rescore_query_weight" : 2,
"score_mode" : "max"
},
"window_size" : 50
}
}
# 结果
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 3,
"relation" : "eq"
},
"max_score" : 0.83934015,
"hits" : [
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "3",
"_score" : 0.83934015,
"_source" : {
"name" : "hello hello hello good me",
"count" : 20
}
},
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "2",
"_score" : 0.83536226,
"_source" : {
"name" : "hello hello good",
"count" : 15
}
},
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "1",
"_score" : 0.31931415,
"_source" : {
"name" : "hello good",
"count" : 10
}
}
]
}
}
# rescore 搜索
# resocre 搜索时对query和rescore搜索分别加权
# 结果评分取最小值
GET /rescore_test/_search
{
"query" : {
"match" : {
"name" : "hello good"
}
},
"rescore" : {
"query" : {
"rescore_query" : {
"match_phrase" : {
"name" : {
"query" : "hello hello good",
"slop" : 2
}
}
},
"query_weight" : 1,
"rescore_query_weight" : 2,
"score_mode" : "min"
},
"window_size" : 50
}
}
# 结果
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 3,
"relation" : "eq"
},
"max_score" : 0.32814604,
"hits" : [
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "2",
"_score" : 0.32814604,
"_source" : {
"name" : "hello hello good",
"count" : 15
}
},
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "1",
"_score" : 0.31931415,
"_source" : {
"name" : "hello good",
"count" : 10
}
},
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "3",
"_score" : 0.30038467,
"_source" : {
"name" : "hello hello hello good me",
"count" : 20
}
}
]
}
}
# multi rescores
GET /rescore_test/_search
{
"query" : {
"match" : {
"name" : "hello"
}
},
"rescore" : [
{
"query" : {
"rescore_query" : {
"match_phrase" : {
"name" : {
"query" : "hello hello good",
"slop" : 2
}
}
},
"query_weight" : 1,
"rescore_query_weight" : 2
},
"window_size" : 50
},
{
"query" : {
"rescore_query" : {
"function_score" : {
"script_score" : {
"script" : {
"source" : "Math.log10(doc.count.value + 2)"
}
}
}
},
"score_mode" : "multiply"
},
"window_size" : 10
}
]
}
# 结果
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 3,
"relation" : "eq"
},
"max_score" : 1.3811765,
"hits" : [
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "3",
"_score" : 1.3811765,
"_source" : {
"name" : "hello hello hello good me",
"count" : 20
}
},
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "2",
"_score" : 1.2603258,
"_source" : {
"name" : "hello hello good",
"count" : 15
}
},
{
"_index" : "rescore_test",
"_type" : "_doc",
"_id" : "1",
"_score" : 0.17229891,
"_source" : {
"name" : "hello good",
"count" : 10
}
}
]
}
}
