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/**     * 多字段分组并求和；实现sql:select user as userAgg, sex as sexAgg, sum(age) as sumAgg from twitter.tweet group by user, sex;     */    @Test    public void sumAfterTwiceAgg() {
           SearchResponse response = client.prepareSearch("twitter").setTypes("tweet")                .addAggregation(AggregationBuilders.terms("userAgg").field("user.keyword")                        .subAggregation(AggregationBuilders.terms("sexAgg").field("sex.keyword")                                .subAggregation(AggregationBuilders.sum("sumAgg").field("age"))))  //求和要放到最内层的分组语句里面                .get();        Terms userAgg = response.getAggregations().get("userAgg");        for (Terms.Bucket entry : userAgg.getBuckets()) {
               Terms sexAgg = entry.getAggregations().get("sexAgg");            for (Terms.Bucket entry2 : sexAgg.getBuckets()) {
                   Sum sum = entry2.getAggregations().get("sumAgg");                System.out.println("user:" + entry.getKey()+"-------sex:"+entry2.getKey() + "----------sum:" + sum.getValue());            }        }    }

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