ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception

ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception, reason=Fielddata is disabled on text fields by default. Set fielddata=true on [categoryName] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.]]
这个原因是因为我们分组聚合查询的字符串类型事text类型，在es中，只有keyword类型的字符串可以分组聚合，读取数据库会将字符串读取为text类型，属于动态映射，想要分组查询，利用静态映射自定义字符串类型即可
=v=