> I cannot get rid of a sequence:
>
> gis=# drop sequence geopol.geology_gid_seq;
> ERROR: cache lookup of relation 8511697 failed
>
> Yes, geology_gid_seq have been created as a consequence of a
> geology.gid attribute of type serial.
> And.. yes, I've removed the relation with a delete on pg_class.
> Where is this sequence-to-relation association stored so that
> i can clean it up ?
It's stored in the pg_depend table. See here:
http://www.postgresql.org/docs/current/static/catalog-pg-depend.html
A really good reason to disable manual catalog modifications by default :)
Chris