Column Cardinality and Stats table as an "interface"

[Nick Dimiduk]

Hello,

I'm curious if there are any tricks for estimating the cardinality of the
values in a phoenix column. Even for leading rowkey column, a select
distinct query on a large table requires a full scan (PHOENIX-258). Maybe
one could reach into the stats table and derive some knowledge? How much of
a "bad thing" would this be?

Thanks,
Nick