greg landrum <greg.landrum@gmail.com> writes:
> Tom Lane wrote:
>> text = DatumGetCString(DirectFunctionCall1(varcharout, text_datum));
> This form of dealing with arguments is interesting to learn about. Is
> there any documentation of this stuff or do I need to dive into the source?
The original motivation for this notation is discussed in
src/backend/utils/fmgr/README, and there's some basic docs in the
main SGML documentation. Beyond that, looking at code that does
something close to what you want has always been the best guide ...
regards, tom lane