On Thu, 2006-10-12 at 01:25 -0400, Tom Lane wrote:
> It does seem like this is wrong, in view of SQL92's statement about
> ALTER TABLE DROP COLUMN:
>
> 4) If RESTRICT is specified, then C shall not be referenced in
> the <query expression> of any view descriptor or in the <search
> condition> of any constraint descriptor other than a table con-
> straint descriptor that contains references to no other column
> and that is included in the table descriptor of T.
>
> IOW we should only allow unique constraints to be auto-dropped if
> they reference just the one single column. Ick.
I didn't realize before that you can also drop all columns, leaving a
table without *any* columns. Is that a SQL92 "feature"?
Joe
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