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relational/test/union_join.query
Salvo 'LtWorf' Tomaselli 950a2273c3 New query optimization 
A * B ∪ A * C = A * (B ∪ C)
2015-12-31 14:26:28 +01:00

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people⋈σ skill == 'Perl' (skills) ∪ (people⋈σ skill == 'C' (skills))
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