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 \'a\'
        Literal \'a\'
      Literal \'a\'
