Re: Re: regexp_matches illegally restricts rows -- just a documentation issue?

On Tue, Apr 6, 2010 at 1:06 AM, Josh Berkus <josh(at)postgresql(dot)org> wrote:
> On 4/5/10 9:16 PM, Josh Berkus wrote:
>
>> I can't see how this is anything but a bug; as far as I know, nothing in
>> the target list is allowed to restrict the number of rows which are
>> returned by the query.  We should get 7 rows, 3 of which have an empty
>> array or a NULL in the 2nd column.
>
> Just noticed it's a SETOF[] function.  Which makes it odd that I can
> call it in the target list at all, but explains the row restriction.
>
> It's still confusing behavior (three regulars on IRC thought it was a
> bug too) and users should be warned in the documentation.  Not sure
> exactly where, though ... maybe in 9.7?

While I understand why this is confusing, it's really very normal
behavior for a SRF, and I don't really think it makes sense to
document that this SRF behaves just like other SRFs...

...Robert