Re: [PATCH] Report column-level error when lacking privilege

On Sun, Mar 29, 2026 at 6:07 PM Steve Chavez <steve@supabase.io> wrote:

> When a role `xx` has `grant select (name) on items to xx;`, a generic
> table-level error is given:
>
> select * from items;
> ERROR:  permission denied for table items
>
> With this patch, we now give:
>
> select * from items;
> ERROR:  permission denied for column "id" of relation "items"
>
>
Not too fond of picking one column as a representative for the error
message.  Better to say something like:

ERROR:  permission denied for column subset of table items

Haven't looked but it should be doable to run a query for a given relation
and role and report for each column whether a grant is available or not;
which would be the one-stop shop for figuring out which columns at least
don't have permissions granted.  The user would still have to know which
ones their query is actually using.

David J.