[HACKERS] auto_explain : log queries with wrong estimation

Hi hackers,


I try to made a patch to auto_explain in order to log queries with wrong estimation.

I compare planned row id : queryDesc->planstate->plan->plan_rows

Vs ntuples : queryDesc->planstate->instrument->ntuples;

If I understand, instrumentation is used only with explain. So my patch works
only with explain (and segfault without).


Is there a simple way to get ntuples?

Attached a naive patch.

Thanks :)

--
Adrien NAYRAT

http://dalibo.com - http://dalibo.org