Package se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.cardinality
package se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.cardinality
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ClassDescriptionThis class implements an approach to cardinality estimation that is based on the following two ideas: First, for leaf nodes in the given plans, which are request operators, the implementation issues cardinality requests to the respective federation members.This class implements a cardinality estimation approach that relies on the cardinalities of subPlans.