I have found no way to drop a column from a table. Is this possible?

In meanwhile, if I can't drop the column, I need to change it from NOT NULL to NULL. AFAIK,
this is not possible. So, I need to change the column to add DEFAULT 0 (since it's numeric,
I just put a 0 in place).

So, what is really possible to do? Drop column? Put a default?


Tkx,

Edson Richter