Determine the name of the calling function

Postgres 9.2 / pgAdmin III

Linux / Windows XP

Hello,

Within a sub-function, I would like to programmatically determine the name
of the calling function.

In a previous programming language, I could call a special built-in
function, PROGRAM(n), where n=1 would return the name of the calling
program; n=2, the name of the program above that; and so on up the stack.

I've tried out all the special variables associated with "GET STACKED
DIAGNOSTICS" statement; but I don't see a way to get the name of the
calling program. And I don’t find this information anywhere else in the
PostgreSQL documentation.

How do I programmatically determine, from a sub-function, the name of the
calling function?

Thank you, Jack

--
Jack Kaufman
MDS Application Devl (US)
Sanmina-SCI Corporation - Owego site
Email: jack(dot)kaufman(at)sanmina(dot)com
Skype: jack_kaufman_sanm
607-723-0507

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