Enum JoinType

java.lang.Object
java.lang.Enum<JoinType>
org.apache.calcite.sql.JoinType
All Implemented Interfaces:
Serializable, Comparable<JoinType>, java.lang.constant.Constable, Symbolizable

public enum JoinType extends Enum<JoinType> implements Symbolizable
Enumerates the types of join.
  • Enum Constant Details

    • INNER

      public static final JoinType INNER
      Inner join.
    • FULL

      public static final JoinType FULL
      Full outer join.
    • CROSS

      public static final JoinType CROSS
      Cross join (also known as Cartesian product).
    • LEFT

      public static final JoinType LEFT
      Left outer join.
    • LEFT_SEMI_JOIN

      public static final JoinType LEFT_SEMI_JOIN
      Left semi join.

      Not used by Calcite; only in Babel's Hive dialect.

    • COMMA

      public static final JoinType COMMA
      Comma join: the good old-fashioned SQL FROM clause, where table expressions are specified with commas between them, and join conditions are specified in the WHERE clause.
  • Field Details

    • lowerName

      public final String lowerName
      Lower-case name.
  • Method Details

    • values

      public static JoinType[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.
      Returns:
      an array containing the constants of this enum type, in the order they are declared
    • valueOf

      public static JoinType valueOf(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:
      IllegalArgumentException - if this enum type has no constant with the specified name
      NullPointerException - if the argument is null
    • generatesNullsOnLeft

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

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