Re: After each row trigger NOT seeing data changes?

Tom Lane wrote:
> Karl Nack <karlnack(at)futurityinc(dot)com> writes:
> > I notice the row count does not reflect the newly-inserted row, which
> > suggests that the trigger is not seeing changes made to the table. This
> > seems to be exactly opposite of what's in the manual:
> > http://www.postgresql.org/docs/8.3/interactive/trigger-datachanges.html
> > http://www.postgresql.org/docs/8.3/interactive/trigger-example.html
>
> The reason is that you've declared the function STABLE, which causes it
> to use the calling query's starting snapshot. So it cannot see any
> in-progress changes of the calling query. Declare it VOLATILE (or
> let it default to that) and it will act as you expect.
>
> I'm not sure if the cited portions of the manual ought to contain notes
> about this or not. It seems a bit off-topic for them, but if other
> people have been bit by this, then maybe ... comments anyone?

I have applied the attached documentation patch to subtly mention this
issue.

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