If he simple function call is giving you a more lazy evaluation evaluation, that might explain what's occurring.
It may be that the database engine requires the subquery to break the possibility of a cycle in the code, and sequence the computation.
To this day, males 18+ must register. Those who do not cannot receive Federal financial aid, nor work as a GS or contract employee for the Fed.
Did it do a 4G inverted dive?
This scientific journal just had to retract 60 papers. How does that even happen?
I invented the "One Click" wheel.
Pfft. I invented the wheel with round corners.