共计 4962 个字符，预计需要花费 13 分钟才能阅读完成。
[toc]
实际 007-elasticsearch 查问之 2 -Request Body 与 DSL 查问
1. 查问语句通过 HTTP Request Body 发送给 ES
POST movies/_search?ignore_unavailable=true
{
"profile": "true",
"query": {"match_all": {}
}
}2. 分页：from+size
POST movies/_search?ignore_unavailable=true
{
"profile": "true",
"from": 0,
"size": 2,
"query": {"match_all": {}
}
}3. 排序：sort
POST movies/_search?ignore_unavailable=true
{
"profile": "true",
"from": 0,
"size": 5,
"sort": [
{"year": "desc"},
{"title.keyword": "desc"}
],
"query": {"match_all": {}
}
}4. source 字段过滤: 只返回须要的列
POST movies/_search?ignore_unavailable=true
{
"profile": "true",
"_source": [
"id",
"title",
"year"
],
"from": 0,
"size": 5,
"sort": [
{"year": "desc"},
{"title.keyword": "desc"}
],
"query": {"match_all": {}
}
}反对通配符 *：
_"source": ["name*", "desc\*"]
5. script_fields 脚本字段：自加工后果
POST movies/_search
{
"from": 0,
"size": 5,
"sort": [
{
"year": {"order": "desc"}
},
{
"title.keyword": {"order": "desc"}
}
],
"script_fields": {
"year_and_title": {
"script": {
"lang": "painless",
"source": "doc['year'].value +'->'+ doc['title.keyword'].value"
}
}
},
"query": {"match_all": {}
}
}title=When We First Met; year=2018;
year_and_title=year->title
然而如同_source 数据没了：
{
"took" : 10,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 9743,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "187717",
"_score" : null,
"fields" : {
"year_and_title" : ["2018->Won't You Be My Neighbor?"]
},
"sort" : [
2018,
"Won't You Be My Neighbor?"
]
},
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "184015",
"_score" : null,
"fields" : {
"year_and_title" : ["2018->When We First Met"]
},
"sort" : [
2018,
"When We First Met"
]
},
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "184471",
"_score" : null,
"fields" : {
"year_and_title" : ["2018->Tomb Raider"]
},
"sort" : [
2018,
"Tomb Raider"
]
},
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "183959",
"_score" : null,
"fields" : {
"year_and_title" : ["2018->Tom Segura: Disgraceful"]
},
"sort" : [
2018,
"Tom Segura: Disgraceful"
]
},
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "188833",
"_score" : null,
"fields" : {
"year_and_title" : ["2018->The Man Who Killed Don Quixote"]
},
"sort" : [
2018,
"The Man Who Killed Don Quixote"
]
}
]
}
}6. match 查问表达式: TermQuery
6.1 TermQuery
POST movies/_search
{
"query": {
"match": {"title": "beautiful mind"}
}
}后果：蕴含 beautiful 的(16 条)，或 蕴含 mind 的(5 条），共（20 条）：
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 20,
"relation" : "eq"
},
"max_score" : 13.687479,
"hits" : [
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "4995",
"_score" : 13.687479,
"_source" : {
"id" : "4995",
"genre" : [
"Drama",
"Romance"
],
"title" : "Beautiful Mind, A",
"@version" : "1",
"year" : 2001
}
},
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "3912",
"_score" : 8.723258,
"_source" : {
"id" : "3912",
"genre" : [
"Comedy",
"Drama"
],
"title" : "Beautiful",
"@version" : "1",
"year" : 2000
}
},
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "47404",
"_score" : 8.576847,
"_source" : {
"id" : "47404",
"genre" : [
"Adventure",
"Animation",
"Comedy",
"Fantasy",
"Romance",
"Sci-Fi"
],
"title" : "Mind Game",
"@version" : "1",
"year" : 2004
}
},
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "1046",
"_score" : 7.317063,
"_source" : {
"id" : "1046",
"genre" : [
"Drama",
"Romance"
],
"title" : "Beautiful Thing",
"@version" : "1",
"year" : 1996
}
},
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "94",
"_score" : 7.317063,
"_source" : {
"id" : "94",
"genre" : [
"Comedy",
"Drama",
"Romance"
],
"title" : "Beautiful Girls",
"@version" : "1",
"year" : 1996
}
},
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "4242",
"_score" : 7.317063,
"_source" : {
"id" : "4242",
"genre" : [
"Comedy",
"Crime",
"Drama",
"Thriller"
],
"title" : "Beautiful Creatures",
"@version" : "1",
"year" : 2000
}
},
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "4372",
"_score" : 7.317063,
"_source" : {
"id" : "4372",
"genre" : [
"Drama",
"Romance"
],
"title" : "Crazy/Beautiful",
"@version" : "1",
"year" : 2001
}
},
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "3302",
"_score" : 7.317063,
"_source" : {
"id" : "3302",
"genre" : ["Comedy"],
"title" : "Beautiful People",
"@version" : "1",
"year" : 1999
}
},
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "90353",
"_score" : 7.317063,
"_source" : {
"id" : "90353",
"genre" : ["Drama"],
"title" : "Beautiful Boy",
"@version" : "1",
"year" : 2010
}
},
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "100487",
"_score" : 7.317063,
"_source" : {
"id" : "100487",
"genre" : [
"Drama",
"Fantasy",
"Romance"
],
"title" : "Beautiful Creatures",
"@version" : "1",
"year" : 2013
}
}
]
}
}6.2 TermQuery+AND/OR/NOT
POST movies/_search
{
"query": {
"match": {
"title": {
"query": "beautiful mind",
"operator": "and"
}
}
}
}- operator: and/or/not 对 ”query” 的词条做限度逻辑关系，加上
and后，便只有一个记录：
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : 13.687479,
"hits" : [
{
"_index" : "movies",
"_type" : "_doc",
"_id" : "4995",
"_score" : 13.687479,
"_source" : {
"id" : "4995",
"genre" : [
"Drama",
"Romance"
],
"title" : "Beautiful Mind, A",
"@version" : "1",
"year" : 2001
}
}
]
}
}7.match_phrase 查问表达式：PhraseQuery
7.1 PhraseQuery
POST movies/_search
{
"query": {
"match_phrase": {
"title": {"query": "beautiful mind"}
}
}
}
#// 或者上面模式都可
POST movies/_search
{
"query": {
"match_phrase": {"title": "beautiful mind"}
}
}后果就只有一条，因为是 PhraseQuery：既要求分词，又要求程序；
7.2 PhraseQuery+slop
- slop /sl>p/ n. 脏水，淡而无味的半流质食物；泔水
POST movies/_search
{
"query": {
"match_phrase": {
"title": {
"query": "friday part",
"slop": 2
}
}
}
}slop=2, 就是容许 friday 和 part 两头 掺和 2 个杂词(不相干的任意词)
正文完
发表至： elasticsearch
2022-04-29
