FYI, Lars H. is looking at PHOENIX-258 for improving performance of DISTINCT. We don't yet keep any cardinality info in our stats (see PHOENIX-1178).
Thanks, James On Thu, Apr 14, 2016 at 11:22 AM, Nick Dimiduk <ndimi...@gmail.com> wrote: > 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 >
