96 lines
2.6 KiB
Markdown
96 lines
2.6 KiB
Markdown
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因收到Google相关通知，网站将会择期关闭。相关通知内容
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20 WrapperQuery
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实现方式理论基础
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Wrapper Query 官网说明
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https://www.elastic.co/guide/en/elasticsearch/reference/6.4/query-dsl-wrapper-query.html
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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).
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GET /_search
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{
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"query" : {
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"wrapper": {
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"query" : "eyJ0ZXJtIiA6IHsgInVzZXIiIDogIktpbWNoeSIgfX0=" // Base64 encoded string: {"term" : { "user" : "Kimchy" }}
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}
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}
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}
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将DSL JSON语句 转成 map
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https://blog.csdn.net/qq_41370896/article/details/83658948
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String dsl = "";
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Map maps = (Map)JSON.parse(dsl);
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maps.get("query");// dsl query string
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Java 代码
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https://blog.csdn.net/tcyzhyx/article/details/84566734
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https://www.jianshu.com/p/216ca70d9e62
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StringBuffer dsl = new StringBuffer();
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dsl.append("{\"bool\": {");
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dsl.append(" \"must\": [");
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dsl.append(" {");
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dsl.append(" \"term\": {");
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dsl.append(" \"mdid.keyword\": {");
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dsl.append(" \"value\": \"2fa9d41e1af460e0d47ce36ca8a98737\"");
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dsl.append(" }");
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dsl.append(" }");
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dsl.append(" }");
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dsl.append(" ]");
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dsl.append(" }");
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dsl.append("}");
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WrapperQueryBuilder wqb = QueryBuilders.wrapperQuery(dsl.toString());
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SearchResponse searchResponse = client.prepareSearch(basicsysCodeManager.getYjzxYjxxIndex())
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.setTypes(basicsysCodeManager.getYjzxYjxxType()).setQuery(wqb).setSize(10).get();
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SearchHit[] hits = searchResponse.getHits().getHits();
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for(SearchHit hit : hits){
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String content = hit.getSourceAsString();
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System.out.println(content);
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}
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query + agg 应该怎么写
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http://www.itkeyword.com/doc/1009692843717298639/wrapperquerybuilder-aggs-query-throwing-query-malformed-exception
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"{\"query\":{\"match_all\": {}},\"aggs\":{\"avg1\":{\"avg\":{\"field\":\"age\"}}}}"
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SearchSourceBuilder ssb = new SearchSourceBuilder();
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// add the query part
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String query ="{\"match_all\": {}}";
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WrapperQueryBuilder wrapQB = new WrapperQueryBuilder(query);
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ssb.query(wrapQB);
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// add the aggregation part
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AvgBuilder avgAgg = AggregationBuilders.avg("avg1").field("age");
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ssb.aggregation(avgAgg);
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实现示例
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略
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