Package org.apache.calcite.rel.core

Enum JoinRelType

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Comparable<JoinRelType>
    public enum JoinRelType
extends java.lang.Enum<JoinRelType>
    Enumeration of join types.

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description
      FULL  
      INNER  
      LEFT  
      RIGHT  

    • Field Summary

      Fields 
      Modifier and Type Field Description
      java.lang.String lowerName
      Lower-case name.

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private JoinRelType()  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      JoinRelType cancelNullsOnLeft()
      Returns a join type similar to this but that does not generate nulls on the left.
      JoinRelType cancelNullsOnRight()
      Returns a join type similar to this but that does not generate nulls on the right.
      boolean generatesNullsOn​(int i)
      Returns whether this join type generates nulls on side #i.
      boolean generatesNullsOnLeft()
      Returns whether a join of this type may generate NULL values on the left-hand side.
      boolean generatesNullsOnRight()
      Returns whether a join of this type may generate NULL values on the right-hand side.
      JoinRelType swap()
      Swaps left to right, and vice versa.
      static JoinRelType valueOf​(java.lang.String name)
      Returns the enum constant of this type with the specified name.
      static JoinRelType[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.

      • Methods inherited from class java.lang.Enum

        clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

      • Methods inherited from class java.lang.Object

        getClass, notify, notifyAll, wait, wait, wait

    • Field Detail

      • lowerName

        public final java.lang.String lowerName
        Lower-case name.

    • Constructor Detail

      • JoinRelType

        private JoinRelType()

    • Method Detail

      • values

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

      • valueOf

        public static JoinRelType 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

      • generatesNullsOnRight

        public boolean generatesNullsOnRight()
        Returns whether a join of this type may generate NULL values on the right-hand side.

      • generatesNullsOnLeft

        public boolean generatesNullsOnLeft()
        Returns whether a join of this type may generate NULL values on the left-hand side.

      • swap

        public JoinRelType swap()
        Swaps left to right, and vice versa.

      • generatesNullsOn

        public boolean generatesNullsOn​(int i)
        Returns whether this join type generates nulls on side #i.

      • cancelNullsOnLeft

        public JoinRelType cancelNullsOnLeft()
        Returns a join type similar to this but that does not generate nulls on the left.

      • cancelNullsOnRight

        public JoinRelType cancelNullsOnRight()
        Returns a join type similar to this but that does not generate nulls on the right.