Re: variadic flag doesn't work with "any" type

2010/12/10 Tom Lane <tgl@sss.pgh.pa.us>:
> Pavel Stehule <pavel.stehule@gmail.com> writes:
>> 2010/12/9 Tom Lane <tgl@sss.pgh.pa.us>:
>>> What exactly is the use-case for that?
>
>> I am working on function that can help with record updating. It's
>> based on polymorphic types. I would to allow a multiple modification
>> per one call - like UPDATE statement does.
>> some like:
>> record_set_fields(anyelement, key text, value "any" [, key text, value
>> "any" [..]]) returns anyelement
>
> OK, makes sense, since you don't want to constrain the values to be all
> the same datatype.

ok, can I send a patch?

Pavel

>
>> sometimes can be interesting to use a VARIADIC value - so list of
>> pairs (key, =C2=A0value) can be created dynamically - (now I don't talk =
if
>> this is good way or not).
>
> That can't work unless you constrain all the values to be text (to match
> the column-name parameters), which more or less defeats the entire point
> of the function. =C2=A0So I see no interesting use-case for VARIADIC here.
>
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0regards, tom lane
>