SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Function toDateTime (alias dt) (children 1)
     ExpressionList (children 1)
      Literal \'2002-12-12 23:23:23\'
    Function toString (children 1)
     ExpressionList (children 1)
      Identifier dt
   Set
