Re: Rules on a view overwrite default values. Any way to

On Mon, 3 Jan 2005, Bradley Kieser wrote:

> Hi,
>
> I use views extensively to implement security on tables. This requires
> each table to have a view. All updates, inserts and deletes take place
> through the view. The view has rules for each of these operations
> defining security for that table. Under other conditions, the view also
> removes complex views of the underlying data from the application layer
> by supplying a view where the rules for update, insert and delete
> implement business logic.
>
> The problem is that rules on a view mean that the default values for NOT
> NULL columns (used extensively) no longer trigger!
>
> E.g.
>
> Table A had column "updated_time" which is not null default now().
> Inserting into the view on table A where "updated_time" has not been
> supplied will not fill in "now()". It will attempt to put in a null
> value and hence the insert will fail in the insert rule on that view.

I believe the easiest way is to attach a default to the view column
using ALTER TABLE viewname ALTER COLUMN viewcolumn SET DEFAULT
defaultexpr.