Is there any way to check whether the row already exists before checking constraints ? I still want it to fail if it turns out to be a new row (which would violate the not null constraint), but updates the row if it already exists.
Since if that is not possible, I would need to do a query to determine whether the row exists in the database which kinda eliminates the use of upsert. (in this case, partial upsert).
On Sun, Nov 20, 2016 at 3:57 AM, Tom Lane <tgl@xxxxxxxxxxxxx> wrote:
Adrian Klaver <adrian.klaver@xxxxxxxxxxx> writes:
> ... So looks like constraints are checked before you get to the ON CONFLICT section.
Right. ON CONFLICT is a means for dealing with duplicate-key errors in
the specified (or inferred) unique index. It is *not* an all-purpose
error catcher. In the case at hand, the given INSERT request fails due
to not-null constraints that are unrelated to what the ON CONFLICT clause
tests for.
regards, tom lane
