sorry, im newbie and i have one question.
Im wondering about one issue, it is : have any way to know how many different value in one field in elasticsearch?
Example : name index is :twitter , type tweet , field user . And in field user have some value about
Have any way elasticsearch know how many different user in this ? , in my example is 3 : Mr.A,Mr.B,Mr.C
i think maybe can use filter script but i dont know how to do .
Thanks for your help