ES 聚合-先group 在sum

来源：互联网发布：老九门百度云同步网络编辑：程序博客网时间：2024/05/20 04:49

实现一个SQL: SELECT sum(field) from table group by field2

使用：AggregationBuilders.sum("name").field("field");

public static void searchTest() throws IOException {        TermsBuilder companyNameAgg = AggregationBuilders.terms("companyName").field("companyName").size(10);        SumBuilder companyNameAggSum = AggregationBuilders.sum("companyNameSum").field("cvcount");        companyNameAgg.subAggregation(companyNameAggSum);//把sum聚合器放入到Term聚合器中，相当于先group by在sum        SearchRequestBuilder searchBuilder = ElasticClientFactory.getClient().prepareSearch(indexname).setTypes(typeName).addAggregation(companyNameAgg);        SearchResponse searchResponse = searchBuilder.execute().actionGet();        Terms terms = searchResponse.getAggregations().get("companyName");        List<Terms.Bucket> buckets = terms.getBuckets();        List<String> list = Lists.newArrayList();        for (Terms.Bucket bucket : buckets) {            InternalSum internalSum = bucket.getAggregations().get("companyNameSum");//注意从bucket而不是searchResponse            System.out.println(bucket.getKeyAsString() + "\t" + bucket.getDocCount() + "\t"+internalSum.getValue());        }        System.out.println("done");    }

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