Re: VIP: new format for psql - shell - simple using psql in shell

On Sat, May 26, 2012 at 11:50 AM, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> wrote:
> 2012/5/26 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:
>> Bruce Momjian <bruce(at)momjian(dot)us> writes:
>>> On Sat, May 26, 2012 at 05:39:23PM +0200, Pavel Stehule wrote:
>>>> I proposed new psql's format "shell". This format is optimized for
>>>> processing returned result in shell:
>>
>>> I am unclear exactly how this relates to shells.
>>
>> What I'm unclear on is why we'd want to encourage that style of
>> programming.  The most charitable prediction of performance is that it
>> would suck --- not only do you have all the inefficiencies inherent in
>> row-by-row result processing with a shell script, but you're forcing a
>> separate database connection for each query.  And I don't actually see
>> where it would be especially convenient to use, compared to say perl
>> or python or other scripting languages.  I'd rather see us worrying
>> about the convenience of cases like
>>
>>        psql ... | perl -e ...
>
> A performance is not important in this case - typical use case for
> this feature are simple tasks - some simple maintaining - where people
> can prepare SQL in psql, and later can reuse knowledge in some simple
> scripts. Shell has one significant advantage against perl or python -
> is everywhere (on UNIX) and it is best for very simple tasks.
>
> Regards
>
> Pavel
>
>
>
>>
>>                        regards, tom lane
>
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bash isn't everywhere (on UNIX)...