Re: upsert and update filtering

aaaa
That's because the access on this case is done to the existing row using the table's name / alias , and to the rows that we attempt to insert using the excluded

Thank you Peter

Armand

> On Jul 31, 2017, at 4:31 PM, Peter Geoghegan <pg(at)bowt(dot)ie> wrote:
>
> armand pirvu <armand(dot)pirvu(at)gmail(dot)com> wrote:
>> But what if in the conflict situation I want to performa the update ONLY if the record is different. The update seems to happen no matter what
>> In other words is there anyway I can filter the update to happen (based on the sample date) only for 112 since col2 is different ?
>
> That's quite possible. An ON CONFLICT's UPDATE accepts a WHERE clause,
> which can reference both existing and excluded tuples. That WHERE clause
> can back out of the UPDATE based on whatever criteria you like.
>
> --
> Peter Geoghegan