Re: problem with reading source code-pull out nondeterministic expresssions

I get it, thanks! > 在 2015年12月31日，上午3:00，Michael Armbrust 写道： > > The goal here is to ensure that the non-deterministic value is evaluated only > once, so the result won't change for a given row (i.e. when sorting). > > On Tue, Dec 29, 2015 at 10:57 PM, 汪洋

Re: problem with reading source code-pull out nondeterministic expresssions

The goal here is to ensure that the non-deterministic value is evaluated only once, so the result won't change for a given row (i.e. when sorting). On Tue, Dec 29, 2015 at 10:57 PM, 汪洋 wrote: > Hi fellas, > I am new to spark and I have a newbie question. I am currently

problem with reading source code-pull out nondeterministic expresssions

Hi fellas, I am new to spark and I have a newbie question. I am currently reading the source code in spark sql catalyst analyzer. I not quite understand the partial function in PullOutNondeterministric. What does it mean by "pull out”? Why do we have to do the "pulling out”? I would really