"PostgreSQL Bugs List" <pgsql-bugs@postgresql.org> writes:
> CREATE OR REPLACE FUNCTION _test_delete_and_drop()
> RETURNS void AS $$
> BEGIN
> DELETE FROM _test;
> DROP TABLE _test;
> RETURN;
> END;
> $$ LANGUAGE plpgsql;
This will work fine the first time. When you recreate the "_test" table
and try to use the function again, the DELETE will fail because it's
cached a plan referring to the prior incarnation of the table. plpgsql
has always worked like that; it's not a new issue.
You can work around this by executing the DELETE with EXECUTE, viz
EXECUTE 'DELETE FROM _test';
so that it gets re-planned each time.
There are plans to improve this situation, but it won't happen in the
near future (certainly not for 8.0).
regards, tom lane