Ronan Dunklau <ronan_dunklau(at)ultimatesoftware(dot)com> writes:
> I've noticed that renaming an indexed column produces inconsistencies in
> the catalog. Namely, the attname of the attribute of the relation is
> properly updated, whereas the attname of the attribute in the index is not,
> and keeps the old value.
If memory serves, we used to try to rename index columns, and gave up
on that because it caused problems of its own. That's (one reason) why
modern versions of psql show a "definition" column in \d of an index.
> I think this could be considered a bug in Postgres.
It is not.
> If it isn't, what
> should be the proper way to retrieve this information ?
psql uses pg_get_indexdef(), looks like.
regards, tom lane