字段聚合

注意

Text fields are not optimised for operations that require per-document field data like aggregations and sorting, so these operations are disabled by default. Please use a keyword field instead. Alternatively, set fielddata=true on [] in order to load field data by uninverting the inverted index. Note that this can use significant memory.

解决办法

添加fileddata。但是不推荐，占用内存太大。

POST 索引名/_mapping
    {
    "properties": {
        "字段名": {
            "type": "text",
            "fielddata":true
        }
    }
}