[no subject]

	create function foo(int) ...
	...
	   select ... where keycol = $1;
	...

looks the same as

	PREPARE q(int) AS select ... where keycol = $1;

and you can investigate the plan for this with

	EXPLAIN [ANALYZE] EXECUTE q(42);

Clear?  It'd be nice to have more infrastructure for debugging plpgsql
code, but so far no one's got round to building any :-(

			regards, tom lane