On Sun, Feb 13, 2011 at 10:49 PM, Josh Berkus <josh@agliodbs.com> wrote:
>
>> I fail to see how 1 through 3 can tell the planner the correlation
>> between two fields in two separate tables.
>
> CREATE CORRELATION_ESTIMATE ( table1.colA ) = ( table2.colB ) IS 0.3
>
> ... and then it fixes the correlation for *every* query in the database, not
> just that one. And is easy to fix if the correlation changes.
I like that. Even better, could we setup some kind of simple command
to tell analyze to collect stats for the two columns together?
