Package org.h2.mode

Enum DefaultNullOrdering

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

    public enum DefaultNullOrdering
    extends java.lang.Enum<DefaultNullOrdering>
    Default ordering of NULL values.
    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description
      FIRST
      NULL values are sorted before other values, no matter if ascending or descending order is used.
      HIGH
      NULL values are considered as larger than other values during sorting.
      LAST
      NULL values are sorted after other values, no matter if ascending or descending order is used.
      LOW
      NULL values are considered as smaller than other values during sorting.
    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private DefaultNullOrdering​(int defaultAscNulls, int defaultDescNulls)  
    • Enum Constant Detail

      • LOW

        public static final DefaultNullOrdering LOW
        NULL values are considered as smaller than other values during sorting.
      • HIGH

        public static final DefaultNullOrdering HIGH
        NULL values are considered as larger than other values during sorting.
      • FIRST

        public static final DefaultNullOrdering FIRST
        NULL values are sorted before other values, no matter if ascending or descending order is used.
      • LAST

        public static final DefaultNullOrdering LAST
        NULL values are sorted after other values, no matter if ascending or descending order is used.
    • Field Detail

      • defaultAscNulls

        private final int defaultAscNulls
      • defaultDescNulls

        private final int defaultDescNulls
      • nullAsc

        private final int nullAsc
      • nullDesc

        private final int nullDesc
    • Constructor Detail

      • DefaultNullOrdering

        private DefaultNullOrdering​(int defaultAscNulls,
                                    int defaultDescNulls)
    • Method Detail

      • values

        public static DefaultNullOrdering[] 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 (DefaultNullOrdering c : DefaultNullOrdering.values())
            System.out.println(c);
        
        Returns:
        an array containing the constants of this enum type, in the order they are declared
      • valueOf

        public static DefaultNullOrdering 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
      • valueOf

        public static DefaultNullOrdering valueOf​(int ordinal)
        Returns default ordering of NULL values for the specified ordinal number.
        Parameters:
        ordinal - ordinal number
        Returns:
        default ordering of NULL values for the specified ordinal number
        See Also:
        Enum.ordinal()
      • compareNull

        public int compareNull​(boolean aNull,
                               int sortType)
        Compare two expressions where one of them is NULL.
        Parameters:
        aNull - whether the first expression is null
        sortType - the sort bit mask to use
        Returns:
        the result of the comparison (-1 meaning the first expression should appear before the second, 0 if they are equal)