SparkSQL优化
https://zhuanlan.zhihu.com/p/78804934
https://www.cnblogs.com/shishanyuan/
https://www.cnblogs.com/shishanyuan/category/1159549.html
https://www.cnblogs.com/shishanyuan/category/1164468.html
https://www.cnblogs.com/shishanyuan/category/719232.html
https://zhuanlan.zhihu.com/p/78804934
https://www.cnblogs.com/lyr999736/p/10204619.html
https://blog.qiniu.com/archives/8832
https://blog.csdn.net/purisuit_knowledge/article/details/90703442
https://www.infoq.cn/article/HDBkWj8_ZEOrRzBPYceR
比较基础的SparkSQL执行计划
http://www.jasongj.com/spark/rbo/
http://www.jasongj.com/spark/cbo/
https://juejin.im/post/5bf2d13051882530544eeb4b