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relational/test/union_projection.result

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New optimization Turns π a,b,c(A) ∪ π a,b,c(B) into π a,b,c(A ∪ B) if A and B are union compatible Works with union, intersection and difference.
2016-01-03 03:07:23 +07:00
name,skill
jack,C
eve,Perl
duncan,Perl
duncan,C
john,C
alia,C
eve,C