SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Function appendTrailingCharIfAbsent (children 1)
       ExpressionList (children 2)
        Literal \'\'
        Literal \'a\'
      Literal \'\'
