Bad estimates on GIN bigint[] index

Le 03/09/2019 à 15:43, Tom Lane a écrit :
> "Arnaud L." <arnaud(dot)listes(at)codata(dot)eu> writes:
>> -> Bitmap Index Scan on planet_osm_ways_nodes_idx
>> (cost=0.00..11190.36 rows=1420982 width=0) (actual time=0.268..0.268
>> rows=1 loops=1)
>> Index Cond: (nodes && '{1}'::bigint[])
>
> The planner should be able to do better than that, given up-to-date
> statistics on the "nodes" column.

Sorry to up this thread, but is there anything I can do to help the
planner in this particular case ?
REINDEXing did not help, nor did ANALYZEing with different STATISTICS
target for this specific column.

Regards
--
Arnaud