Cost.java

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package org.apache.doris.nereids.cost;

import org.apache.doris.qe.SessionVariable;

/**
 * Cost encapsulate the real cost with double type.
 * We do this because we want to customize the operation of adding child cost
 * according different operator
 */
public interface Cost {
    double getValue();

    static Cost zero(SessionVariable sessionVariable) {
        if (sessionVariable.getEnableNewCostModel()) {
            return CostV2.zero();
        }
        return CostV1.zero();
    }

    static Cost infinite(SessionVariable sessionVariable) {
        if (sessionVariable.getEnableNewCostModel()) {
            return CostV2.infinite();
        }
        return CostV1.infinite();
    }

    static Cost zeroV1() {
        return CostV1.zero();
    }
}