Re: RfD: more powerful "any" types

2009/9/9 Alvaro Herrera <alvherre(at)commandprompt(dot)com>:
> Pavel Stehule escribió:
>> 2009/9/9 Alvaro Herrera <alvherre(at)commandprompt(dot)com>:
>> > Pavel Stehule escribió:
>> >
>> >> we are able to write sprintf(text, variadic "any") returns text, but only in C
>> >
>> > Hmm, should we provide that function in core?
>>
>> We should it, but I prefer some pgfoundry or contrib package. sprintf
>> is really far to SQL. What more, we knows types, so some format tags
>> are useless. Using original sprintf function is possible, but needs
>> lot of code, because you need to transform PostgreSQL types to C
>> types, and we have not any helping function for this task.
>>
>> Some similar to plpgsql's RAISE statement is some +/- 20 rows
>
> I already published a pseudo-sprintf function in the wiki here:
> http://wiki.postgresql.org/wiki/Sprintf  I'm looking for something
> better, not just the same hacks.
>
> I don't see any good reason that the function needs to be far from core.

what is use case? Why you need sprintf function, when you have ||
operator. This functionality is redundant and out of standard. What I
know, only MySQL has similar function.

Please, try to compile and run sprintf function from attachment

postgres=# select sprintf('1:% 2:% 3:%', 10,null, 'kuku');
sprintf
--------------------
1:10 2:NULL 3:kuku
(1 row)

postgres=# select sprintf('Today is %, I am %.', current_date, current_user);
sprintf
----------------------------------
Today is 2009-09-09, I am pavel.
(1 row)

Regards
Pavel

>
> --
> Alvaro Herrera                                http://www.CommandPrompt.com/
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