Enum Accuracy

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Comparable<Accuracy>

    public enum Accuracy
    extends java.lang.Enum<Accuracy>
    The degree of accuracy of a cardinality estimate
    Since:
    2.1
    • Enum Constant Detail

      • EXACT_COUNT

        public static final Accuracy EXACT_COUNT
      • BEST_UPPER_BOUND

        public static final Accuracy BEST_UPPER_BOUND
      • BEST_LOWER_BOUND

        public static final Accuracy BEST_LOWER_BOUND
      • APPROXIMATION

        public static final Accuracy APPROXIMATION
    • Method Detail

      • values

        public static Accuracy[] values()
        Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
        for (Accuracy c : Accuracy.values())
            System.out.println(c);
        
        Returns:
        an array containing the constants of this enum type, in the order they are declared
      • valueOf

        public static Accuracy valueOf​(java.lang.String name)
        Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
        Parameters:
        name - the name of the enum constant to be returned.
        Returns:
        the enum constant with the specified name
        Throws:
        java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
        java.lang.NullPointerException - if the argument is null
      • atLeastAsPreciseAs

        public boolean atLeastAsPreciseAs​(Accuracy other)
        Partial order comparison.
      • reciprocal

        public Accuracy reciprocal()
        Returns:
        another accuracy value that is anti-monotonic to this one, i.e. an accuracy that should be used in the denominator to obtain a fraction with this accuracy