Re: Using rules to implement backward-compatible schema changes

Mario Becroft <pgsql(at)becroft(dot)co(dot)nz> writes:
> The problem is that when inserting to the view, default values do not
> work as expected.

You need to attach the defaults to the view, viz

ALTER TABLE a ALTER COLUMN bar SET DEFAULT 5;

This is considered a feature not a bug, since you might want a
different default for inserts to the view than for inserts
directly to the underlying table.

regards, tom lane