2.6 KiB
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20 WrapperQuery
实现方式理论基础
Wrapper Query 官网说明
https://www.elastic.co/guide/en/elasticsearch/reference/6.4/query-dsl-wrapper-query.html
This query is more useful in the context of the Java high-level REST client or transport client to also accept queries as json formatted string. In these cases queries can be specified as a json or yaml formatted string or as a query builder (which is a available in the Java high-level REST client).
GET /_search { "query" : { "wrapper": { "query" : "eyJ0ZXJtIiA6IHsgInVzZXIiIDogIktpbWNoeSIgfX0=" // Base64 encoded string: {"term" : { "user" : "Kimchy" }} } } }
将DSL JSON语句 转成 map
https://blog.csdn.net/qq_41370896/article/details/83658948
String dsl = "";
Map maps = (Map)JSON.parse(dsl);
maps.get("query");// dsl query string
Java 代码
https://blog.csdn.net/tcyzhyx/article/details/84566734
https://www.jianshu.com/p/216ca70d9e62
StringBuffer dsl = new StringBuffer(); dsl.append("{"bool": {"); dsl.append(" "must": ["); dsl.append(" {"); dsl.append(" "term": {"); dsl.append(" "mdid.keyword": {"); dsl.append(" "value": "2fa9d41e1af460e0d47ce36ca8a98737""); dsl.append(" }"); dsl.append(" }"); dsl.append(" }"); dsl.append(" ]"); dsl.append(" }"); dsl.append("}"); WrapperQueryBuilder wqb = QueryBuilders.wrapperQuery(dsl.toString()); SearchResponse searchResponse = client.prepareSearch(basicsysCodeManager.getYjzxYjxxIndex()) .setTypes(basicsysCodeManager.getYjzxYjxxType()).setQuery(wqb).setSize(10).get(); SearchHit[] hits = searchResponse.getHits().getHits(); for(SearchHit hit : hits){ String content = hit.getSourceAsString(); System.out.println(content); }
query + agg 应该怎么写
"{"query":{"match_all": {}},"aggs":{"avg1":{"avg":{"field":"age"}}}}" SearchSourceBuilder ssb = new SearchSourceBuilder();
// add the query part String query ="{"match_all": {}}"; WrapperQueryBuilder wrapQB = new WrapperQueryBuilder(query); ssb.query(wrapQB);
// add the aggregation part AvgBuilder avgAgg = AggregationBuilders.avg("avg1").field("age"); ssb.aggregation(avgAgg);
实现示例
略