Martin Pihlak <martin(dot)pihlak(at)gmail(dot)com> writes:
> create function foo() returns integer as $$ begin return 1; end; $$ language plpgsql;
> CREATE FUNCTION
> prepare c1 as select * from foo();
> PREPARE
> execute c1;
> foo
> -----
> 1
> (1 row)
> drop function foo();
> DROP FUNCTION
> create function foo() returns integer as $$ begin return 2; end; $$ language plpgsql;
> CREATE FUNCTION
> execute c1;
> psql:test.sql:11: ERROR: cache lookup failed for function 36555
This is simply a bad, wrong, stupid way to do it. Why do you not use
CREATE OR REPLACE FUNCTION?
regards, tom lane