Re: RfD: more powerful "any" types

2009/9/10 Tom Lane <tgl@sss.pgh.pa.us>:
> Pavel Stehule <pavel.stehule@gmail.com> writes:
>> I don't afraid about crashing. Simply I have not idea what sql
>> sprintf's behave in case:
>
>> SELECT sprintf('some %s', 10)
>
> That one I don't think is hard --- coerce the input type to text and
> print the string.
>
>> SELECT sprintf('some %d', 10::mycustomtype)
>
> For the formats that presume an integer or float input in C, perhaps
> we could coerce to numeric (failing if that fails) and then print
> appropriately.  Or maybe int or float8 would be more appropriate
> conversion targets.

it's possible - so format tags doesn't mean data type, but it means
"try to drow it as type" - etc invisible explicit casting. It could
work, but it doesn't look like SQL.

regards
Pavel Stehule

>
>                        regards, tom lane
>