我有一个运行良好的 ElasticSearch 查询 (curl),是我的第一个查询,
首先我按组织(多租户)过滤,然后按客户分组,最后总结销售量,但我只想拥有 3 个最好的客户。
我的问题是..如何使用 AggregationBuilders 构建聚合以获得“bucket_sort”语句。我使用 Java API 按客户进行了销售分组。
弹性查询是:
curl -X POST 'http://localhost:9200/sales/sale/_search?pretty' -H 'Content-Type: application/json' -d '
{
"aggs": {
"filtered": {
"filter": {
"bool": {
"must": [
{
"term": {
"organization_id": "15"
}
}
]
}
},
"aggs": {
"by_customer": {
"terms": {
"field": "customer_id"
},
"aggs": {
"sum_total" : {
"sum": {
"field": "amount"
}
},
"total_total_sort": {
"bucket_sort": {
"sort": [
{"sum_total": {"order": "desc"}}
],
"size": 3
}
}
}
}
}
}
}
}'
我的Java代码:
@Test
public void queryBestCustomers() throws UnknownHostException {
Client client = Query.client();
AggregationBuilder sum = AggregationBuilders.sum("sum_total").field("amount");
AggregationBuilder groupBy = AggregationBuilders.terms("by_customer").field("customer_id").subAggregation(sum);
AggregationBuilder aggregation =
AggregationBuilders
.filters("filtered",
new FiltersAggregator.KeyedFilter("must", QueryBuilders.termQuery("organization_id", "15"))).subAggregation(groupBy);
SearchRequestBuilder requestBuilder = client.prepareSearch("sales")
.setTypes("sale")
.addAggregation(aggregation);
SearchResponse response = requestBuilder.execute().actionGet();
}
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