Tom,
> Perhaps
> SELECT true = ANY (SELECT boolcol FROM ...);
> or
> SELECT true IN (SELECT boolcol FROM ...);
>
> Which is not to say that MAX(bool) might not be a nicer solution;
> but you can definitely do it with SQL-spec constructs.
Based on some rough testing,
SELECT true = ANY ( SELECT boolcol FROM complex query )
Is marginlly faster than
SELECT max(boolcol) FROM complex query
With a custom MAX(boolean) function.
So I'll stick to ANY().
-Josh
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