Fail of a return query from plpgsql function for a specific table

In response to c k :

Hi all,
I have a table accgroups and many others. I have written a test function as
follows.
CREATE OR REPLACE FUNCTION uf_testfunction()
RETURNS SETOF associates AS
$BODY$
begin
return query select * from associates;
return;
end;
$BODY$
LANGUAGE 'plpgsql' VOLATILE;
This works fine for above table but not works at all for accgroups table. As I
searched for this over web, it is identified as a bug for tables whose columns
are changed(deleted and added). Is it true?
How to solve this issue?
Thanks
CPK

I can't reproduce your problem:

test=# create table foo (a int, b int);
CREATE TABLE
test=# create or replace function get_foo() returns setof foo as $$begin return query select * from foo; return; end; $$ LANGUAGE 'plpgsql' VOLATILE;
CREATE FUNCTION
test=# select * from get_foo();
a | b
---+---
(0 rows)

test=# alter table foo add column c int;
ALTER TABLE
test=# select * from get_foo();
a | b | c
---+---+---
(0 rows)

(only if i drop a column):
test=# alter table foo drop column c;
ALTER TABLE
test=# select * from get_foo();
ERROR: structure of query does not match function result type
CONTEXT: PL/pgSQL function "get_foo" line 1 at RETURN QUERY

Please, provide us an example including the error you got.

Andreas
--
Andreas Kretschmer
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