Re: Proposal: TRUNCATE TABLE table RESTRICT

Don Baccus wrote:
> 
> At 09:24 PM 6/8/00 +0900, Tatsuo Ishii wrote:
> >It seems the truncate command deletes all rows from a table even it is
> >referenced by another tables. TRUNCATE is not in the standard any way,
> >so I would not claim this is a bug. However, sometimes it would be
> >helpful for a user to let him notice that the table about to be
> >truncated is referenced by some tables. So I would propose to add
> >"RESTRICT" option to the command. I mean if RESTRICT is specified,
> >TRUNCATE will fail if the table is referenced.
> 
> Shouldn't it always fail if an explicit foreign key reference
> exists to the table, in much the way that delete of a referenced
> row does?  If it doesn't now, I think it's a bug.
> 
> If the references are implicit (no REFERENCE or FOREIGN KEY given
> to inform the db of the relationship) then a RESTRICT option to
> truncate does seem useful.
> 

Just curious, Don. But could you check to see what Oracle's
behavior is on this? That's the feature I was trying to mirror.
At the time, RI wasn't integrated so I wasn't thinking about this
issue. And the Oracle docs state that DML triggers aren't fired
when a TRUNCATE is issued, so I didn't think there would be
issues there. Could you check?

Thanks, 

Mike Mascari


> - Don Baccus, Portland OR <dhogaza@pacifier.com>
>   Nature photos, on-line guides, Pacific Northwest
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