Re: Trigger with conditional predicates

--
Dirk Mika
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> > On 1 Jan 2021, at 16:56, Dirk Mika <Dirk(dot)Mika(at)mikatiming(dot)de> wrote:
> >
> > Hi all and a happy new Year!
> >
> > We have an Oracle schema that is to be converted to PostgreSQL, where conditional predicates are used in some triggers.
> >
> > In particular, columns are populated with values if they are not specified in the update statement which is used.
> > Usually with an expression like this:
> >
> > IF NOT UPDATING('IS_CANCELED')
> > THEN
> > :new.is_canceled := ...;
> > END IF;
> >
> > I have not found anything similar in PostgreSQL. What is the common approach to this problem?

> Can't you use column defaults to handle these cases?

That would work for inserts, but not for updates.

BR
Dirk