Re: Odd error in complex query (7.2): Sub-SELECT

At 14:36 29/10/01 -0500, Tom Lane wrote:
>Philip Warner <pjw(at)rhyme(dot)com(dot)au> writes:
>> Sorry for the convoluted example:
>
>A simplified example is

And here's a simpler one that seems to avoid views altogether:

create table lkp(f1 int);
create table t1(f1 int, x int);

Select
case when Exists(Select * From lkp where lkp.f1 = t1.f1) then
'known'
else
'unknown'
end as status,
sum(x)
from t1
group by 1;

It's pretty similar to the sample you gave, but also presents the sort of
operation people may well want to perform.

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