| From: | Alban Hertroys <haramrae(at)gmail(dot)com> |
|---|---|
| To: | Sim Zacks <sim(at)compulab(dot)co(dot)il> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: update with from |
| Date: | 2012-01-23 14:34:37 |
| Message-ID: | CAF-3MvO1G8OsRu+FFRmmFZZmXgVud7NvrEfs+8XhmteB+KFRnA@mail.gmail.com |
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| Lists: | pgsql-general |
On 23 January 2012 14:48, Sim Zacks <sim(at)compulab(dot)co(dot)il> wrote:
>> In my tests, if the joined rows are sorted it always updates with the
>> first row. Does anyone have any other experiences, or should I be
>> concerned that at some point it will behave differently?
>
> I checked my tests again. It always uses the last one, not the first one.
>
> Sim
I expect that your records get updated multiple times too.
Perhaps you can use DISTINCT ON in your from-based UPDATE?
--
If you can't see the forest for the trees,
Cut the trees and you'll see there is no forest.
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