Hi Jacky, Yes result preparation in exeutor side. -Regards Kumar Vishal
On Wed, Oct 12, 2016 at 9:33 PM, Jacky Li <jacky.li...@qq.com> wrote: > Hi Vishal, > > Which part of the preparation are you considering? The column stitching in > the executor side? > > Regards, > Jacky > > > 在 2016年10月12日，下午9:24，Kumar Vishal <kumarvishal1...@gmail.com> 写道： > > > > Hi All, > > Currently we are preparing the final result row wise, as number of > columns > > present in project list(80 columns) is high mainly measure column or no > > dictionary column there are lots of cpu cache invalidation is happening > and > > this is resulting to slower the query performance. > > > > *I can think of two solutions for this problem.* > > *Solution 1*. Fill column data vertically, currently it is > horizontally(It > > may not solve all the problem) > > *Solution 2*. Use code generation for result preparation. > > > > This is an initially idea. > > > > -Regards > > Kumar Vishal > > > >
