Thanks, I created an issue [1] to improve the assertion.

[1] https://issues.apache.org/jira/browse/CALCITE-4650

пн, 7 июн. 2021 г. в 23:30, Haisheng Yuan <hy...@apache.org>:

> > Shouldn't we remove the assertion above?
> Perhaps.
>
> Or perhaps the rel2Subset mapping is not up to date.
>
> Regards,
> Haisheng Yuan
>
> On 2021/06/06 13:09:16, Vladimir Ozerov <ppoze...@gmail.com> wrote:
> > Hi,
> >
> > When doing a trait derivation in the non-OMAKASE mode, the following
> lines
> > of code are invoked:
> > 1: RelSubset relSubset = planner.register(newRel, rel);
> > 2: assert relSubset.set == planner.getSubset(rel).set;
> >
> > The assertion on the second line may fail because the "newRel" is
> assigned
> > not the "rel" set, but "rel" *canonical set*, which might be different.
> >
> > As a workaround, we may change the derive mode to OMAKASE. In this case,
> we
> > do not hit the assertion and planning completes successfully.
> >
> > Shouldn't we remove the assertion above?
> >
> > Regards,
> > Vladimir.
> >
>

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