SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function IPv6CIDRToRange (children 1)
     ExpressionList (children 2)
      Function toFixedString (children 1)
       ExpressionList (children 2)
        Literal \'1234\'
        Literal UInt64_16
      Function toUInt16 (children 1)
       ExpressionList (children 1)
        Literal UInt64_1