Package se.liu.ida.hefquin.engine.queryproc.impl.poptimizer
package se.liu.ida.hefquin.engine.queryproc.impl.poptimizer
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ClassDescriptionThis interface represents cardinality estimators that can estimate the cardinality of the result that will be produced by query plans.An exception that occurred during the process of estimating the cardinality of the result that will be produced by a given plan.An exception that occurred during the process of estimating the cost of a given plan.