org.apache.calcite.plan

Interface RelOptCostFactory

public interface RelOptCostFactory

Cost model for query planning.

Method Summary

Methods

Modifier and Type	Method and Description
RelOptCost	makeCost(double rowCount, double cpu, double io) Creates a cost object.
RelOptCost	makeHugeCost() Creates a cost object representing an enormous non-infinite cost.
RelOptCost	makeInfiniteCost() Creates a cost object representing infinite cost.
RelOptCost	makeTinyCost() Creates a cost object representing a small positive cost.
RelOptCost	makeZeroCost() Creates a cost object representing zero cost.

Method Detail

makeCost

RelOptCost makeCost(double rowCount,
                  double cpu,
                  double io)

Creates a cost object.

makeHugeCost

RelOptCost makeHugeCost()

Creates a cost object representing an enormous non-infinite cost.

makeInfiniteCost

RelOptCost makeInfiniteCost()

Creates a cost object representing infinite cost.

makeTinyCost

RelOptCost makeTinyCost()

Creates a cost object representing a small positive cost.

makeZeroCost

RelOptCost makeZeroCost()

Creates a cost object representing zero cost.