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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