"David G. Johnston" <david.g.johnston@gmail.com> writes:
> I noticed that too...I suspect its related to the ANALYZE result:
> Index Scan using idx_tabla_entidad on entidad (cost=0.56..51121.41
> rows=1405216 width=20) (actual time=0.037..242.609 rows=1409985 loops=1)
> Index Cond: ((cod_tabla)::bigint = 4)
Yeah, that *strongly* suggests that cod_tabla isn't really bigint.
I'm wondering about domains, for instance.
regards, tom lane