带有RETURNS TABLE（id整数）的PostgreSQL存储过程返回所有NULL

I have a stored procedure in PostgreSQL 8.4 that calls another stored procedure depending on the integer value passed in as a parameter. Those stored procedures are called such that they should return a relation with one integer column. The problem I am having is that the outer stored procedure always returns a relation with the correct number of rows but with all of the id's NULL. I have a stored procedure in PostgreSQL 8.4 tha