Can anyone explain this failure? It still exists in CVS.
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>
> A minor nasty error I got when trying to improve the query used to disable
> triggers:
>
> create table t1(f1 int4, f2 int4);
> create table t2(f1 int4, f2 int4);
>
> insert into t1 values(1, 0);
> insert into t1 values(2, 0);
>
> insert into t2 values(1, 0);
>
> update t1 set f2=count(*) from t2 where t1.f1=1 and t2.f1=t1.f1 ;
> UPDATE 1
>
> update t1 set f2=count(*) from t2 where t1.f1=2 and t2.f1=t1.f1 ;
> ERROR: ExecutePlan: (junk) `ctid' is NULL!
>
> I would have expected no update to occur since no rows match.
>
>
> ----------------------------------------------------------------
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