SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function toIPv6OrDefault (alias v) (children 1)
     ExpressionList (children 1)
      Literal \'hello\'
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier v
