Learned containment rates between query pairs, combined with a queries pool of known cardinalities, substantially improve cardinality estimates on multi-join queries.
Since to the best of our knowledge, the problem of determining containment rate has not been addressed till now, we used a transformation as described in Section 4.1 below
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Improved Cardinality Estimation by Learning Queries Containment Rates
Learned containment rates between query pairs, combined with a queries pool of known cardinalities, substantially improve cardinality estimates on multi-join queries.