Re: New buildin function

On Fri, 24 Jan 2003, Olleg Samoylov wrote:

> On 23 Jan 2003, Rod Taylor wrote:

> Nope. CURRENT_USER and SESSION_USER return username. Sometimes need uid,
> it's key usesysid in table pg_shadow, for instance, for row based
> permissions. Explain in example:
>
> create table role {
> role smallinteger, -- analog group of users
> name text
> }
>
> create table permission { -- link role with pg_user
> uid integer references pg_user(usesysid),
> role smallint references role
> }
>
> create table protected_table {
> -- payload fields
> access smallint references role,
> author_of_last_changes integer references pg_user(usesysid) default
> PG_SESSION_UID(), -- proposed function
> time_of_last_changes timestamp not null default current_timestamp
> }

As a side note, the above table definitions are pretty invalid.
Referencing system tables is not guaranteed to work, and referencing
system views even less so.