> Here is how I think SQL-level row permissions would work:
>
> We already have an optional OID system column that can be specified
> during table creation (WITH OIDS). We could have another optional oid
> column (WITH ROW SECURITY) called security_context which would store the
> oid of the role that can see the row; if the oid is zero (InvalidOid),
> anyone can see it. SE-PostgreSQL would default to WITH ROW SECURITY and
> use the oid to look up strings in pg_security.
I like the idea of a WITH ROW SECURITY option to enable row-level
security - that way, tables that don't need it don't have to pay for
it, but I like the idea of storing a full ACL, as KaiGai proposed,
rather than just a single role. Seems much more powerful.
...Robert