> >> This bothers me a bit, because in
> >> fact the effects if any of the tested query would have been rolled 
> >> back.  Not sure we have any choice though.  If we expose the error 
> >> then we'll have problems with clients not showing the EXPLAIN 
> >> results.
> 
> > I think we should leave it in top level, throw the error and fix the

> > clients.
> > As I understood, the idea was, that it only does that if you press
^C 
> > or query timeout. In this case current clients would also not show
the 
> > plan.
> 
> Not if the clients are implemented per protocol spec.  A 
> client cannot assume that sending QueryCancel will make the 
> current query fail.

Sorry I don't understand that comment. I did not not say that it must
fail,
but iff it is interrupted (and thus fails) was the case I meant.

You stated, that current clients won't show the explain output if they 
get a protocol error response. (Does the protocol not allow both data
and error ?)

We would need to teach clients to output the explain result even if an
error
is returned.

I hold my comment: on ^C we should return the plan and return the error.
We should not misuse automatic subtransactions for this.

Andreas

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