刘虓

couldn't install rbhive using 'gem install ...'

2

localhost:ext liuxiao$ gem install rbhive > Building native extensions. This could take a while... > ERROR: Error installing rbhive: > ERROR: Failed to build gem native extension. > > No...

截止到spark 2.0,spark-sql的优化器永远只会返回一个plan

1

据源代码所示，spark-sql的优化器永远只会返回一个plan，也就是说目前spark-sql只有逻辑优化，没有物理优化