Elasticsearch的高級查詢
#Elasticsearch的高級查詢緩存
子條件查詢
特定字段查詢指定特定的值url
Query context
在查詢的過程當中，除了判斷文檔是否知足條件以外，ES還會計算一個_score來標識匹配的程度，旨在判斷目標文檔和查詢條件匹配有多好。spa
經常使用查詢
全文本查詢
針對文本類型數據code
模糊匹配
url:http://localhost:9200/book/_doc/_search
請求體以下:
{
"query":{
"match":{
"title":"Elasticsearch入門"
}
}
}
複製代碼
返回的結果以下:索引
{
"took": 4,
"timed_out": false,
"_shards": {
"total": 3,
"successful": 3,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 3,
"relation": "eq"
},
"max_score": 0.3439677,
"hits": [
{
"_index": "book",
"_type": "_doc",
"_id": "3",
"_score": 0.3439677,
"_source": {
"author": "王五",
"word_count": 2000,
"title": "Elasticsearch入門",
"publish_date": "2018-10-01"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "4",
"_score": 0.3439677,
"_source": {
"author": "趙六",
"word_count": 100000,
"title": "Elasticsearch進階",
"publish_date": "2017-11-11"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "10",
"_score": 0.26592463,
"_source": {
"author": "jack",
"word_count": 5000,
"title": "Elasticsearch的深刻理解",
"publish_date": "2018-05-09"
}
}
]
}
}
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模糊匹配的問題：模糊匹配會把相關詞的匹配的此都返回來了。ip
詞語匹配
url:http://localhost:9200/book/_doc/_search
請求體：{
"query":{
"match_phrase":{
"title":"Elasticsearch入門"
}
}
}
複製代碼
返回結果：文檔
{
"took": 7,
"timed_out": false,
"_shards": {
"total": 3,
"successful": 3,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 1,
"relation": "eq"
},
"max_score": 2.6459458,
"hits": [
{
"_index": "book",
"_type": "_doc",
"_id": "3",
"_score": 2.6459458,
"_source": {
"author": "王五",
"word_count": 2000,
"title": "Elasticsearch入門",
"publish_date": "2018-10-01"
}
}
]
}
}
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######多字段匹配(multi_match)string
url:http://localhost:9200/book/_doc/_search
請求體：
{
"query":{
"multi_match":{
"query":"李啓明",
"fields":["author","title"]
}
}
}
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返回結果it
{
"took": 6,
"timed_out": false,
"_shards": {
"total": 3,
"successful": 3,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 3,
"relation": "eq"
},
"max_score": 3.5740404,
"hits": [
{
"_index": "book",
"_type": "_doc",
"_id": "2",
"_score": 3.5740404,
"_source": {
"author": "李四",
"word_count": 2000,
"title": "李啓明的成長記",
"publish_date": "2018-06-01"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "9",
"_score": 3.0162745,
"_source": {
"author": "旺仔",
"word_count": 2000,
"title": "李啓明回憶錄",
"publish_date": "2017-06-01"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "8",
"_score": 1.5404451,
"_source": {
"author": "李啓明",
"word_count": 2000,
"title": "旺仔回憶錄",
"publish_date": "2017-06-02"
}
}
]
}
}
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######語法查詢(query_string)io
url:http://localhost:9200/book/_doc/_search
請求體：
{
"query":{
"query_string":{
"query":"李啓明 OR Elasticsearch",
"fields":["author","title"]
}
}
}
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返回結果：
{
"took": 16,
"timed_out": false,
"_shards": {
"total": 3,
"successful": 3,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 6,
"relation": "eq"
},
"max_score": 3.5740404,
"hits": [
{
"_index": "book",
"_type": "_doc",
"_id": "2",
"_score": 3.5740404,
"_source": {
"author": "李四",
"word_count": 2000,
"title": "李啓明的成長記",
"publish_date": "2018-06-01"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "9",
"_score": 3.0162745,
"_source": {
"author": "旺仔",
"word_count": 2000,
"title": "李啓明回憶錄",
"publish_date": "2017-06-01"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "8",
"_score": 1.5404451,
"_source": {
"author": "李啓明",
"word_count": 2000,
"title": "旺仔回憶錄",
"publish_date": "2017-06-02"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "3",
"_score": 0.3439677,
"_source": {
"author": "王五",
"word_count": 2000,
"title": "Elasticsearch入門",
"publish_date": "2018-10-01"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "4",
"_score": 0.3439677,
"_source": {
"author": "趙六",
"word_count": 100000,
"title": "Elasticsearch進階",
"publish_date": "2017-11-11"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "10",
"_score": 0.26592463,
"_source": {
"author": "jack",
"word_count": 5000,
"title": "Elasticsearch的深刻理解",
"publish_date": "2018-05-09"
}
}
]
}
}
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字段級別的查詢
針對結構化數據，如數字，日期等。
######範圍查詢
url:http://localhost:9200/book/_doc/_search
請求體：
{
"query":{
"range":{
"word_count":{
"gte":1000,
"lte":2000
}
}
}
}
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返回結果：
{
"took": 10,
"timed_out": false,
"_shards": {
"total": 3,
"successful": 3,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 5,
"relation": "eq"
},
"max_score": 1,
"hits": [
{
"_index": "book",
"_type": "_doc",
"_id": "2",
"_score": 1,
"_source": {
"author": "李四",
"word_count": 2000,
"title": "李啓明的成長記",
"publish_date": "2018-06-01"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "3",
"_score": 1,
"_source": {
"author": "王五",
"word_count": 2000,
"title": "Elasticsearch入門",
"publish_date": "2018-10-01"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "1",
"_score": 1,
"_source": {
"author": "張三",
"word_count": 1000,
"title": "旺仔的成長記",
"publish_date": "2018-06-02"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "8",
"_score": 1,
"_source": {
"author": "李啓明",
"word_count": 2000,
"title": "旺仔回憶錄",
"publish_date": "2017-06-02"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "9",
"_score": 1,
"_source": {
"author": "旺仔",
"word_count": 2000,
"title": "李啓明回憶錄",
"publish_date": "2017-06-01"
}
}
]
}
}
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Filter context
在查詢過程種，只判斷該文檔是否知足條件，只有Yes或者No.filter須要結婚bool一塊兒使用,filter查詢因爲es會作緩存，索引在查詢速度上會快過query查詢
url:http://localhost:9200/book/_doc/_search
請求體：
{
"query":{
"bool":{
"filter":{
"term":{
"word_count":1000
}
}
}
}
}
複製代碼
返回結果：
{
"took": 5,
"timed_out": false,
"_shards": {
"total": 3,
"successful": 3,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 1,
"relation": "eq"
},
"max_score": 0,
"hits": [
{
"_index": "book",
"_type": "_doc",
"_id": "1",
"_score": 0,
"_source": {
"author": "張三",
"word_count": 1000,
"title": "旺仔的成長記",
"publish_date": "2018-06-02"
}
}
]
}
}
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複合條件查詢
以必定的邏輯組合子條件查詢
固定分數查詢(只支持filter和bool查詢)
url:http://localhost:9200/book/_doc/_search
reuqest body:
{
"query":{
"constant_score":{
"filter":{
"match":{
"title":"Elasticsearch"
}
},
#能夠設置分數
"boost":2
}
}
}
複製代碼
返回結果：
{
"took": 3,
"timed_out": false,
"_shards": {
"total": 3,
"successful": 3,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 3,
"relation": "eq"
},
"max_score": 2,
"hits": [
{
"_index": "book",
"_type": "_doc",
"_id": "3",
"_score": 2,
"_source": {
"author": "王五",
"word_count": 2000,
"title": "Elasticsearch入門",
"publish_date": "2018-10-01"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "4",
"_score": 2,
"_source": {
"author": "趙六",
"word_count": 100000,
"title": "Elasticsearch進階",
"publish_date": "2017-11-11"
}
},
{
"_index": "book",
"_type": "_doc",
"_id": "10",
"_score": 2,
"_source": {
"author": "jack",
"word_count": 5000,
"title": "Elasticsearch的深刻理解",
"publish_date": "2018-05-09"
}
}
]
}
}
複製代碼
布爾查詢
{ "query":{ "bool":{ "must_not":{ "term":{ "title":"Elasticsearch" } } } } }
...more
{
"query":{
"bool":{
"must_not":{
"term":{
"title":"Elasticsearch"
}
},
"filter":[
{
"match":{
"author":"李啓明"
}
}
]
}
}
}
複製代碼
返回結果：
{
"took": 2,
"timed_out": false,
"_shards": {
"total": 3,
"successful": 3,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 1,
"relation": "eq"
},
"max_score": 0,
"hits": [
{
"_index": "book",
"_type": "_doc",
"_id": "8",
"_score": 0,
"_source": {
"author": "李啓明",
"word_count": 2000,
"title": "旺仔回憶錄",
"publish_date": "2017-06-02"
}
}
]
}
}
複製代碼
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