Maximal Query Plan

Recursive query plan (maximal):

q(mike) => ws(Date,From,To,mike,Aircraft)

a(Aircraft) => ws(Date,From,To,mike,Aircraft)

q(Pilot) => ws(Date,From,To,Pilot,Aircraft) &

a(Aircraft)

a(Aircraft) => ws(Date,From,To,Pilot,Aircraft) &

q(Pilot)

Is it possible to generate maximal

recursive query plans automatically?

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