The actual impl might be slightly different but the below should give you the logical idea.
Base cuboid calculates "group by (a, b, c)" -- 3-D cuboid should mean the same 2-D cuboid calculates "group by (a, b) + group by (a, c) + group by (b, c)" 1-D cuboid calculates "group by (a) + group by (b) + group by (c)" On Fri, Feb 19, 2016 at 10:22 AM, 热爱大发挥 <[email protected]> wrote: > I guess > "Build N-Dimension Cuboid Data: 3-Dimension" means "group by (a,b,c)? > "Build N-Dimension Cuboid Data: 2-Dimension" means "group by (a,b) + > group by (ac) + group by (bc) ?? > "Build N-Dimension Cuboid Data: 1-Dimension" means "group by (a) + group > by (b) + group by (c) ?? > "Build N-Dimension Cuboid Data: 0-Dimension" > > > ------------------ 原始邮件 ------------------ > *发件人:* "冬瓜"<[email protected]>; > *发送时间:* 2016年2月19日(星期五) 凌晨1:07 > *收件人:* "user"<[email protected]>; > *主题:* question with "build cuboid" > > If I have three dimensions "a", "b", "c" > Can you explain > > "Build Base Cuboid Data", > "Build N-Dimension Cuboid Data: 3-Dimension", > "Build N-Dimension Cuboid Data: 2-Dimension" > "Build N-Dimension Cuboid Data: 1-Dimension" > "Build N-Dimension Cuboid Data: 0-Dimension" > > Each step in the calculation is what? >
