On Wed, Dec 5, 2012 at 11:39 AM, Guillaume Smet
wrote:
> Hi,
>
> I'm struggling with a query for some time and the major problem of the
> query is that the statistics are way wrong on a particular operation:
> -> Nested Loop (cost=3177.72..19172.84 rows=*2* width=112) (actual
> time=139.221..60
Jeff Janes writes:
> The trivial answer to "why" is that it thinks that the vast majority
> of the 33914 rows from the hash join will find no partners in r, but
> in fact each has about 10 partner in r. Why does it think that?
I'm wondering if maybe the vast majority of the rows indeed have no j
