SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Literal \'8.8.8.8 is ipv4 string:                                 \'
    Function isIPv4String (children 1)
     ExpressionList (children 1)
      Literal \'8.8.8.8\'