Re: INSERT ... ON CONFLICT UPDATE/IGNORE 4.0 - Mailing list pgsql-hackers

On 2015-05-20 13:31:57 -0400, Tom Lane wrote:
> Sure, but on what basis does it decide that there's a conflict?
> 
> If you can't use an exclusion constraint to support the command,
> then the error message shouldn't be worded like that.

But you *can* use a exclusion constraint for DO NOTHING. Just not (yet)
for DO UPDATE.