Thank you very much for your help.
In V1 function calling convention, there are micros
like PG_RETURN_TEXT_P and so on. Most of them are
used to return values of the built-in datatypes.
If I want the XXX_in function (for my own data type)
to return a pointer to a particular structure, what
micro should I use? i.e., how should I organize the
return value?
Thank you and wish you and everybody a merry Christmas.
Chongbing
On Fri, 19 Dec 2003, Tom Lane wrote:
> Chongbing Liu <cliu@cs.nmsu.edu> writes:
> > Hello, can you please tell me how to return a NULL value
> > from a function?
>
> You can't unless you use the V1 function calling convention. See the
> programmer's guide.
>
> regards, tom lane
>
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