Re: and it's not a bunny rabbit, either

On Thu, Dec 30, 2010 at 12:32 PM, Robert Haas <robertmhaas@gmail.com> wrote:
> On Thu, Dec 30, 2010 at 11:49 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> One possibility is to break it down like this:
>>
>>        ERROR: foo is a sequence
>>        DETAIL: Triggers can only be used on tables and views.
>>
>> This could still be emitted by a function such as you suggest, and
>> indeed that would be the most practical way from both a consistency
>> and code-size standpoint.
>
> Great idea.  I should have thought of that.

On further reflection, this can still turn into a laundry list in certain cases.

DETAIL: You can only comment on columns of tables, views, and composite types.

seems less helpful than:

DETAIL: Comments on relations with system-generated column names are
not supported.

I think that for rules, triggers, constraints, and anything that only
works on a single relkind, we can't do much better than to list the
specific object types.  But where there's some sort of guiding
principle involved I think we'd do well to articulate it.

--
Robert Haas
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