| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Daniele Varrazzo <daniele(dot)varrazzo(at)gmail(dot)com>, pgsql-bugs(at)postgresql(dot)org |
| Subject: | Re: BUG #5469: regexp_matches() has poor behaviour and more poor documentation |
| Date: | 2010-05-31 14:11:44 |
| Message-ID: | 201005311411.o4VEBiQ11120@momjian.us |
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| Lists: | pgsql-bugs |
Robert Haas wrote:
> On Sat, May 29, 2010 at 5:00 PM, Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> > I have updated the patch, attached, to clarify that this returns text
> > arrays, and that you can force it to always return one row using
> > COALESCE() and a '|' pattern (the later suggested by Daniele Varrazzo).
>
> I don't find this part to be something we should include in the
> documentation. If we want to include a workaround, how about defining
> a non-SRF that just calls the SRF and returns the first row?
Remember this has to return one row for no matches, so a simple SRF will
not work. I also have not seen enough demand for another function. A
single doc mention seemed the appropriate level of detail for this.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
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