es 父子查询 排序 java NativeSearchQueryBuilder
时间: 2023-11-27 09:51:18 浏览: 126
子类、父类查询
要在Java中使用NativeSearchQueryBuilder执行Elasticsearch的父子查询和排序,您可以按照以下步骤:
1. 创建一个NativeSearchQueryBuilder对象:
```
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
```
2. 设置父子查询的参数,例如父文档类型、子文档类型、父文档ID等:
```
queryBuilder.withIndices("index_name").withTypes("parent_type").withQuery(QueryBuilders.hasChildQuery("child_type", QueryBuilders.matchQuery("field_name", "search_query")).scoreType("max"));
```
3. 设置排序方式,例如按字段升序排序:
```
queryBuilder.withSort(SortBuilders.fieldSort("field_name").order(SortOrder.ASC));
```
4. 执行查询并获取结果:
```
SearchHits hits = elasticsearchRestTemplate.search(queryBuilder.build(), IndexCoordinates.of("index_name"));
```
注意要使用elasticsearchRestTemplate对象执行查询,并指定要查询的索引名称。
完整示例代码:
```
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
queryBuilder.withIndices("index_name").withTypes("parent_type").withQuery(QueryBuilders.hasChildQuery("child_type", QueryBuilders.matchQuery("field_name", "search_query")).scoreType("max"));
queryBuilder.withSort(SortBuilders.fieldSort("field_name").order(SortOrder.ASC));
SearchHits hits = elasticsearchRestTemplate.search(queryBuilder.build(), IndexCoordinates.of("index_name"));
```
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