Dynamic DDL

create or replace function schema.insert_function(_schema text, _table
text) returns integer
as
$BODY$
declare
	_affected integer;
begin
	set search_path to _schema;
	insert into _table (columns) values(vals);
return 0;
end;
$BODY$ language plpgsql;

is there any whay to get the functionality of above to work with out
have to build a string and use the execute function?