SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function firstNonDefault (alias result) (children 1)
     ExpressionList (children 4)
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal NULL
        Literal \'Nullable(UInt8)\'
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'0\'
        Literal \'UInt8\'
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'42\'
        Literal \'UInt8\'
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'100\'
        Literal \'UInt8\'
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier result
