Learned containment rates between query pairs, combined with a queries pool of known cardinalities, substantially improve cardinality estimates on multi-join queries.
We compare our cardinality estimates with those of the PostgreSQL version 11 cardinality estimation component [1], and the MSCN model [24]
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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.