查詢Elasticsearch嵌套類型數據，且只返回嵌套數據中命中的元素.md
## 測試環境
- Elasticsearch 6.3
- Kibana 6.3
## 造點測試數據
新建一個index做爲測試
如下是一個存儲博客文章及其評論的數據結構，評論(comments)是nested類型：java
PUT /es_blog
{
"mappings": {
"blogpost": {
"properties": {
"title": {
"type": "text"
},
"summary": {
"type": "text"
},
"content": {
"type": "text"
},
"comments": {
"type": "nested",
"properties": {
"name": {
"type": "text"
},
"comment": {
"type": "text"
},
"age": {
"type": "short"
},
"stars": {
"type": "short"
},
"date": {
"type": "date"
}
}
}
}
}
}
}
寫入一些測試數據
PUT /es_blog/blogpost/1
{
"title": "無標題",
"summary": "全棧工程師、JAVA、HTML5",
"content": "全棧工程師須要掌握：JAVA、HTML五、JavaScript、經常使用緩存、大數據等等",
"comments": [
{
"name": "John Smith",
"comment": "Great article",
"age": 28,
"stars": 4,
"date": "2014-09-01"
},
{
"name": "Alice White",
"comment": "More like this please",
"age": 31,
"stars": 5,
"date": "2014-10-22"
}
]
}
PUT /es_blog/blogpost/2
{
"title": "Java後端開發工程師",
"summary": "JAVA、Oracle、Hibernate、Spring",
"content": "Java後端開發工程師須要掌握：JAVA、Oracle、Hibernate、Spring、經常使用緩存等等",
"comments": [
{
"name": "John Smith",
"comment": "工程師真牛",
"age": 28,
"stars": 4,
"date": "2014-09-01"
},
{
"name": "Alice White",
"comment": "Java工程師真牛",
"age": 31,
"stars": 5,
"date": "2014-10-22"
}
]
}
PUT /es_blog/blogpost/3
{
"title": "大數據工程師",
"summary": "Hadoop、Hive、Hdfs、JAVA",
"content": "大數據工程師須要掌握：Hadoop、Hive、Hdfs、JAVA、Spark、流式計算等等",
"comments": [
{
"name": "John Smith",
"comment": "大數據工程師真牛",
"age": 28,
"stars": 4,
"date": "2014-09-01"
},
{
"name": "Alice White",
"comment": "我不會啊",
"age": 31,
"stars": 5,
"date": "2014-10-22"
}
]
}
PUT /es_blog/blogpost/4
{
"title": "機器學習工程師",
"summary": "Python、迴歸算法、分類算法、神經網絡、數據基礎",
"content": "機器學習工程師須要掌握：Python、迴歸算法、分類算法、神經網絡、有紮實的數據基礎等等",
"comments": [
{
"name": "John Smith",
"comment": "機器學習NX",
"age": 28,
"stars": 4,
"date": "2014-09-01"
},
{
"name": "Alice White",
"comment": "Python好學麼？",
"age": 31,
"stars": 5,
"date": "2014-10-22"
}
]
}
## 執行查詢
查詢文本字段中出現了[工程師]的數據
GET es_blog/blogpost/_search
{
"_source": {
"includes": [
"*"
],
"excludes": [
"comments" //去掉返回結果中父級中的comments信息
]
},
"query": {
"bool": {
"should": [
{
"match": {
"title": "工程師"
}
},
{
"match": {
"summary": "工程師"
}
},
{
"match": {
"content": "工程師"
}
},
{
"nested": {
"path": "comments",
"query": {
"bool": {
"should": [
{
"match": {
"comments.comment": "工程師"
}
}
]
}
},
"inner_hits": {}
}
}
]
}
}
}
返回結果：python
{
"took": 9,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"hits": {
"total": 4,
"max_score": 3.5560012,
"hits": [
{
"_index": "es_blog",
"_type": "blogpost",
"_id": "3",
"_score": 3.5560012,
"_source": {
"summary": "Hadoop、Hive、Hdfs、JAVA",
"title": "大數據工程師",
"content": "大數據工程師須要掌握：Hadoop、Hive、Hdfs、JAVA、Spark、流式計算等等"
},
"inner_hits": {
"comments": {
"hits": {
"total": 1,
"max_score": 1.8299085,
"hits": [
{
"_index": "es_blog",
"_type": "blogpost",
"_id": "3",
"_nested": {
"field": "comments",
"offset": 0
},
"_score": 1.8299085,
"_source": {
"name": "John Smith",
"comment": "大數據工程師真牛",
"age": 28,
"stars": 4,
"date": "2014-09-01"
}
}
]
}
}
}
},
{
"_index": "es_blog",
"_type": "blogpost",
"_id": "2",
"_score": 3.1327708,
"_source": {
"summary": "JAVA、Oracle、Hibernate、Spring",
"title": "Java後端開發工程師",
"content": "Java後端開發工程師須要掌握：JAVA、Oracle、Hibernate、Spring、經常使用緩存等等"
},
"inner_hits": {
"comments": {
"hits": {
"total": 2,
"max_score": 2.0794415,
"hits": [
{
"_index": "es_blog",
"_type": "blogpost",
"_id": "2",
"_nested": {
"field": "comments",
"offset": 0
},
"_score": 2.0794415,
"_source": {
"name": "John Smith",
"comment": "工程師真牛",
"age": 28,
"stars": 4,
"date": "2014-09-01"
}
},
{
"_index": "es_blog",
"_type": "blogpost",
"_id": "2",
"_nested": {
"field": "comments",
"offset": 1
},
"_score": 1.9221728,
"_source": {
"name": "Alice White",
"comment": "Java工程師真牛",
"age": 31,
"stars": 5,
"date": "2014-10-22"
}
}
]
}
}
}
},
{
"_index": "es_blog",
"_type": "blogpost",
"_id": "1",
"_score": 1.7260926,
"_source": {
"summary": "全棧工程師、JAVA、HTML5",
"title": "無標題",
"content": "全棧工程師須要掌握：JAVA、HTML五、JavaScript、經常使用緩存、大數據等等"
},
"inner_hits": {
"comments": {
"hits": {
"total": 0,
"max_score": null,
"hits": []
}
}
}
},
{
"_index": "es_blog",
"_type": "blogpost",
"_id": "4",
"_score": 1.0651813,
"_source": {
"summary": "Python、迴歸算法、分類算法、神經網絡、數據基礎",
"title": "機器學習工程師",
"content": "機器學習工程師須要掌握：Python、迴歸算法、分類算法、神經網絡、有紮實的數據基礎等等"
},
"inner_hits": {
"comments": {
"hits": {
"total": 0,
"max_score": null,
"hits": []
}
}
}
}
]
}
}
查詢content中出現[java]或評論中出現[python]的數據
GET es_blog/blogpost/_search
{
"_source": {
"includes": [
"*"
],
"excludes": [
"comments"
]
},
"query": {
"bool": {
"should": [
{
"match": {
"content": "java"
}
},
{
"nested": {
"path": "comments",
"query": {
"bool": {
"should": [
{
"match": {
"comments.comment": "python"
}
}
]
}
},
"inner_hits": {}
}
}
]
}
}
}
返回結果算法
{
"took": 9,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"hits": {
"total": 4,
"max_score": 1.3112576,
"hits": [
{
"_index": "es_blog",
"_type": "blogpost",
"_id": "4",
"_score": 1.3112576,
"_source": {
"summary": "Python、迴歸算法、分類算法、神經網絡、數據基礎",
"title": "機器學習工程師",
"content": "機器學習工程師須要掌握：Python、迴歸算法、分類算法、神經網絡、有紮實的數據基礎等等"
},
"inner_hits": {
"comments": {
"hits": {
"total": 1,
"max_score": 1.3112576,
"hits": [
{
"_index": "es_blog",
"_type": "blogpost",
"_id": "4",
"_nested": {
"field": "comments",
"offset": 1
},
"_score": 1.3112576,
"_source": {
"name": "Alice White",
"comment": "Python好學麼？",
"age": 31,
"stars": 5,
"date": "2014-10-22"
}
}
]
}
}
}
},
{
"_index": "es_blog",
"_type": "blogpost",
"_id": "2",
"_score": 0.75974846,
"_source": {
"summary": "JAVA、Oracle、Hibernate、Spring",
"title": "Java後端開發工程師",
"content": "Java後端開發工程師須要掌握：JAVA、Oracle、Hibernate、Spring、經常使用緩存等等"
},
"inner_hits": {
"comments": {
"hits": {
"total": 0,
"max_score": null,
"hits": []
}
}
}
},
{
"_index": "es_blog",
"_type": "blogpost",
"_id": "1",
"_score": 0.2876821,
"_source": {
"summary": "全棧工程師、JAVA、HTML5",
"title": "無標題",
"content": "全棧工程師須要掌握：JAVA、HTML五、JavaScript、經常使用緩存、大數據等等"
},
"inner_hits": {
"comments": {
"hits": {
"total": 0,
"max_score": null,
"hits": []
}
}
}
},
{
"_index": "es_blog",
"_type": "blogpost",
"_id": "3",
"_score": 0.2876821,
"_source": {
"summary": "Hadoop、Hive、Hdfs、JAVA",
"title": "大數據工程師",
"content": "大數據工程師須要掌握：Hadoop、Hive、Hdfs、JAVA、Spark、流式計算等等"
},
"inner_hits": {
"comments": {
"hits": {
"total": 0,
"max_score": null,
"hits": []
}
}
}
}
]
}
}
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相關文章
- 1. 《數據庫》嵌套查詢
- 2. SQL數據查詢之——嵌套查詢
- 3. MongoDB之數據查詢（嵌套集合）
- 4. （七）MySQL數據庫-嵌套查詢
- 5. mysql數據庫select嵌套查詢
- 6. EF中嵌套類的where查詢
- 7. 數據庫原理-數據查詢-嵌套查詢
- 8. 嵌套查詢
- 9. Elasticsearch 嵌套類型nested
- 10. linq查詢中嵌套子查詢