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Re: [PATCH] Provide rowcount for utility SELECTs

From: Boszormenyi Zoltan <zb(at)cybertec(dot)at>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>,Alvaro Herrera <alvherre(at)commandprompt(dot)com>,Peter Eisentraut <peter_e(at)gmx(dot)net>,Hans-Juergen Schoenig <hs(at)cybertec(dot)at>,Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>,PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [PATCH] Provide rowcount for utility SELECTs
Date: 2010-02-02 09:03:21
Message-ID: 4B67EA59.6070007@cybertec.at (view raw or flat)
Thread:
Lists: pgsql-hackers
Robert Haas írta:
> 2010/1/12 Boszormenyi Zoltan <zb(at)cybertec(dot)at>:
>   
>> Tom Lane írta:
>>     
>>> Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
>>>
>>>       
>>>> But it would be broken in very obvious ways, no?  It's not like it would
>>>> be silently broken and thus escape testing ...
>>>>
>>>>         
>>> Well, if we wanted to adopt that approach, we should add the count to
>>> *all* SELECT tags not just a small subset.  As the patch stands it
>>> seems entirely possible that a breakage would escape immediate notice.
>>>
>>>       
>> Can you give me an example that would return
>> plain "SELECT" after my new patch? I added
>> one more change to the patch, is it enough to return
>> "SELECT N" in every case now?
>>     
>
> I just tested this, so I can say definitely: no.  I hacked psql with
> the attached patch, and if you just do a plain old SELECT * FROM
> table, you get back only SELECT, not SELECT N.
>
> ...Robert
>   

Thanks for testing it, with the attached patch your test case also
returns SELECT N.

Best regards,
Zoltán Böszörményi

-- 
Bible has answers for everything. Proof:
"But let your communication be, Yea, yea; Nay, nay: for whatsoever is more
than these cometh of evil." (Matthew 5:37) - basics of digital technology.
"May your kingdom come" - superficial description of plate tectonics

----------------------------------
Zoltán Böszörményi
Cybertec Schönig & Schönig GmbH
http://www.postgresql.at/


Attachment: 6-pg85-provide-rowcount-for-utility-select-3-ctxdiff.patch
Description: text/x-patch (4.8 KB)

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