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Alexander Presber asked:
> does somebody know of an extension for postgres that allows the use
> of printf-like format strings?
> PL/Perl comes to mind, but how could one take care of the variable
> argument count?
You could put all the args into one string, with a delimeter either
explicitly specified or defaulted to whitespace:
CREATE OR REPLACE FUNCTION sprintf(text,text,text)
RETURNS TEXT LANGUAGE plperl AS
$_$
my ($string,$args,$delim) = @_;
my $delsplit = defined $delim ? qr{\Q$delim} : qr{\s+};
return sprintf($string, (split $delsplit, $args));
$_$;
CREATE OR REPLACE FUNCTION sprintf(text,text)
RETURNS TEXT LANGUAGE sql AS
$_$
SELECT sprintf($1,$2,null);
$_$;
SELECT sprintf('Best language? %s Best database? %s True answer? %d', 'Perl
Postgres 42', null);
SELECT sprintf('Total grams: %3.3f Donuts: %s', '101.319472|chocolate and
boston cream', '|');
SELECT sprintf('Arguments: %d', (SELECT pow(2,4)));
Output:
sprintf
-------------------------------------------------------------
Best language? Perl Best database? Postgres True answer? 42
(1 row)
sprintf
---------------------------------------------------------
Total grams: 101.319 Donuts: chocolate and boston cream
(1 row)
sprintf
---------------
Arguments: 16
(1 row)
--
Greg Sabino Mullane [EMAIL PROTECTED]
PGP Key: 0x14964AC8 200701221423
http://biglumber.com/x/web?pk=2529DF6AB8F79407E94445B4BC9B906714964AC8
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