HIVE UDAF 编写

https://cloud.tencent.com/developer/article/1918556

 

https://cloud.tencent.com/developer/article/1846460?from=article.detail.1918556

 

 

https://blog.csdn.net/kent7306/article/details/50110067

 

https://cloud.tencent.com/developer/article/1846460?from=article.detail.1918556