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Optimizing multi-table queries

Extending a plan

Query


select ...
from R, S, T, U, V
where S.rk = R.rk
and   U.sk1 = S.sk1
and   U.sk2 = S.sk2
and   U.tk = T.tk
and   V.sk1 = S.sk1
and   V.sk2 = S.sk2
and   ...

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