Hive query optimization with map join

Question

I have a table with 11 gb of data and the other one with 130 gb of data , and I am doing the update operation , Can i use map join in hive to improve query execution optimization ? Please suggest the useful information regarding this .

Answer 1

首先请检查您的Hive版本是否支持更新功能。

Map join肯定会帮助您提高查询性能 还对表应用压缩技术，然后运行update命令 - 这将减少运行时。

实际上，它可以帮助您获得洞察力。