Consulting "Define data model"

[仇同心]

Hi ,all
    In this article at 
http://kylin.apache.org/docs16/tutorial/cube_streaming.html, I have learned 
that Streaming Cube must be partitioned; If you’re going to build the Cube 
incrementally at minutes level, select “MINUTE_START” as the cube’s partition 
date column. If at hours level, select “HOUR_START”.
In the Setting page of Model of the Designer, I have a little confused: “Date 
Format” and “Has a separate "time of the day" column” , these two options is 
useless?
Because when the model has been edited, “Partition Date Column” can only be 
edited.


Thanks!