一种chrome es查询插件：Elasticvue
NativeSearchQueryBuilder多条件查询方法 ：不要连续使用多个withQuery，会会覆盖。
ES数组类型字段搜索以及数组空值搜索 :
每个字段都可以包含零个或多个值，但是所有值必须具有相同的数据类型。
e.g. : https://blog.csdn.net/asdksd/article/details/126750603
聚合查询：
Java Elasticsearch 聚合查询(Aggregation)详解
嵌套聚合：
ElasticSearch聚合查询小例子
解决聚合查询至多返回10个bucket的问题 ：
关于在elasticSearch中使用聚合查询后只显示10个bucket的问题
TermsAggregationBuilder ab1 = AggregationBuilders.terms("groupByAreaLevel").field(arealLevelField).size(500) //不然顶多10个bucket
解决查询数据默认返回10条的问题：
在使用elasticsearch的rest api查询index数据时默认返回10条
NativeSearchQuery nativeSearchQuery = new NativeSearchQueryBuilder().withMaxResults(10000) //不然顶多返回10条
.withQuery(queryBuilder).build();
不过当我设置为更大的值，比如20000时报错了：
Elasticsearch exception [type=search_phase_execution_exception, reason=all shards failed]; nested exception is ElasticsearchStatusException[Elasticsearch exception [type=search_phase_execution_exception, reason=all shards failed]]; nested: ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception, reason=Result window is too large, from + size must be less than or equal to: [10000] but was [20000]. See the scroll api for a more efficient way to request large data sets. This limit can be set by changing the [index.max_result_window] index level setting.]]; nested: ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception, reason=Result window is too large, from + size must be less than or equal to: [10000] but was [20000]. See the scroll api for a more efficient way to request large data sets. This limit can be set by changing the [index.max_result_window] index level setting.]]
记录在此，暂不继续深入。
Elasticsearch Top hits Aggregation ：
Elasticsearch Top hits Aggregation
ElasticSearch 学习笔记：聚合(Aggregation) - Top Hits：功能简介：
聚合后，每一个聚合Bucket里面仅返回指定顺序的前N条数据
