Re: Why does an ON SELECT rule have to be named "_RETURN"?

Martijn van Oosterhout <kleptog@svana.org> writes:
> On Thu, Feb 16, 2006 at 07:28:20AM -0500, Robert Treat wrote:
>> One problem is the only way for a client tool to work generically in prov=
> ding
>> data entry forms would be to provide entry for all columns, which would b=
> reak
>> in all but the most trivial of cases.  Last time we discussed this for
>> phppgadmin, the general opinion was it wasn't worth trying to work around=
>
>> postgresql core's deficiency. Once the core postgresql server supports
>> updatable views in proper, I'd imagine this would get done.

> In the general case, if there are any INSERT/UPDATE/DELETE RULEs on a
> view, there is no way for the client to determine what the effect will
> be except in the simplest of cases, letting the user specify seems the
> best bet.

I agree that this decision on phppgadmin's part seems unsupportable.
Either there is an ON UPDATE rule on a view or there isn't --- it is not
phppgadmin's job to determine what cases that rule supports.  Try to do
the update, and complain if it fails, is all that is required from a
client-side tool.

            regards, tom lane