Interface CardinalityEstimator

All Known Implementing Classes:

RequestBasedCardinalityEstimator

public interface CardinalityEstimator

Method Summary

Modifier and Type	Method	Description
void	addCardinalities(LogicalPlan... plans)	Annotates each of the given plans (including, recursively, each of their subplans) with estimates regarding their result cardinalities.
void	addCardinalities(PhysicalPlan... plans)	Annotates each of the given plans (including, recursively, each of their subplans) with estimates regarding their result cardinalities.

Method Details

addCardinalities

void addCardinalities(LogicalPlan... plans)

Annotates each of the given plans (including, recursively, each of their subplans) with estimates regarding their result cardinalities.

More specifically, this method adds three query plan properties to the QueryPlanningInfo of each of the plans:

• QueryPlanProperty.CARDINALITY
• QueryPlanProperty.MAX_CARDINALITY
• QueryPlanProperty.MIN_CARDINALITY

Parameters:

plans - - the plans to be annotated with cardinality estimates

addCardinalities

void addCardinalities(PhysicalPlan... plans)

Annotates each of the given plans (including, recursively, each of their subplans) with estimates regarding their result cardinalities.

More specifically, this method adds three query plan properties to the QueryPlanningInfo of each of the plans:

• QueryPlanProperty.CARDINALITY
• QueryPlanProperty.MAX_CARDINALITY
• QueryPlanProperty.MIN_CARDINALITY

Parameters:

plans - - the plans to be annotated with cardinality estimates