Re: Using Expanded Objects other than Arrays from plpgsql

Michel Pelletier <pelletier(dot)michel(at)gmail(dot)com> writes:
> Here's two backtraces from gdb from this function:
> CREATE OR REPLACE FUNCTION test2(graph matrix)
> RETURNS bigint LANGUAGE plpgsql AS
> $$
> BEGIN
> perform set_element(graph, 1, 1, 1);
> RETURN nvals(graph);
> end;
> $$;

Well, you shouldn't be using PERFORM. Not only does it not do the
right thing, but it's not optimized for expanded objects at all:
they'll get flattened both on the way into the statement and on
the way out. Try it with

graph := set_element(graph, 1, 1, 1);
RETURN nvals(graph);

regards, tom lane