Re: [HACKERS] DROP COLUMN misbehaviour with multiple inheritance

Alvaro Herrera dijo:

> All right, I now have all the catalog changes on place; this is the easy
> part (is an int2 count enough?).
>
> But when actually dropping a column, the recursion cannot be done the
> way it's done now, fetching the whole inheritor tree in one pass,
> because there's no way to distinguish the direct ones that have the
> attisinherited count greater than 1 from deeper ones; it has to be done
> step by step.

Done. I attach the patch. It's huge because it needs to touch
pg_attribute.h, but it is relatively simple. This passes the regression
tests and fixes the bug reported by Hannu.

Please review and apply if OK. I didn't touch catversion.h.

--
Alvaro Herrera (<alvherre[a]atentus.com>)
"Cuando mañana llegue pelearemos segun lo que mañana exija" (Mowgli)