On Mon, Sep 03, 2018 at 06:59:10PM -0700, Noah Misch wrote:
> If you're going to keep this highly-simplified estimate, please expand the
> comment to say why it doesn't matter or what makes it hard to do better. The
> non-planunionor.c path for the same query computes its own estimate of the
> same underlying quantity. Though it may be too difficult in today's system,
> one could copy the competing path's row count estimate here. Perhaps it
> doesn't matter because higher-level processing already assumes equal row count
> among competitors?
As there has been no replies to Noah's review for one month, I am
marking this patch as returned with feedback for now.
--
Michael