Hello,
It's not really about subject - sorry. I tryed implement support of XML.
For it I need functions which know names of params.
example:
create table foo(a integer);
select xmlnode(a) from foo; -> <a>10</a> ....
select xmlnode(a as b) from foo; -> <b>10</b> ...
I have particular solution, but maybe is better general support for it.
There is some ideas about functions with variable count of params?
Thank You
Pavel Stehule