Ops, found it:
http://www.postgresql.org/docs/8.4/static/view-pg-stats.html
("correlation" column)
I guess it would be worth pointing it out in the planner docs...
Scara Maccai wrote:
> Hi,
>
> does the planner know how "scattered" rows are? If yes: where is this
> info stored?
--
Se
Hi,
does the planner know how "scattered" rows are? If yes: where is this info
stored?
I'm asking because it looks to me that not only the number of rows, but also
how data is on disk (more or less sequential) is used to determine what type of
index scan (bitmap/regular) has to be used...
bu
