Package com.mckoi.database.interpret

Class ByColumn

  • All Implemented Interfaces:
    StatementTreeObject, java.io.Serializable, java.lang.Cloneable
    public final class ByColumn
extends java.lang.Object
implements java.io.Serializable, StatementTreeObject, java.lang.Cloneable
    Object used to represent a column in the 'order by' and 'group by' clauses of a select statement.
    Author:
    Tobias Downer
    See Also:
    Serialized Form

    • Field Summary

      Fields 
      Modifier and Type Field Description
      boolean ascending
      If 'order by' then true if sort is ascending (default).
      Expression exp
      The expression that we are ordering by.
      Variable name
      The name of the column in the 'by'.

    • Constructor Summary

      Constructors 
      Constructor Description
      ByColumn()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.Object clone()
      Performs a DEEP clone of this object if it is mutable, or a deep clone of its mutable members.
      void prepareExpressions​(ExpressionPreparer preparer)
      Prepares all expressions in this statement tree object by passing the ExpressionPreparer object to the 'prepare' method of the expression.
      java.lang.String toString()  

      • Methods inherited from class java.lang.Object

        equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Field Detail

      • name

        public Variable name
        The name of the column in the 'by'.

      • exp

        public Expression exp
        The expression that we are ordering by.

      • ascending

        public boolean ascending
        If 'order by' then true if sort is ascending (default).

    • Constructor Detail

      • ByColumn

        public ByColumn()

    • Method Detail

      • clone

        public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException
        Description copied from interface: StatementTreeObject
        Performs a DEEP clone of this object if it is mutable, or a deep clone of its mutable members. If the object is immutable then it may return 'this'.
        Specified by:
        clone in interface StatementTreeObject
        Overrides:
        clone in class java.lang.Object
        Throws:
        java.lang.CloneNotSupportedException

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object