AlterQuery  enum_nested_alter (children 2)
 ExpressionList (children 1)
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration n.e (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType Enum8 (children 1)
       ExpressionList (children 2)
        Function equals (children 1)
         ExpressionList (children 2)
          Literal \'Hello\'
          Literal UInt64_1
        Function equals (children 1)
         ExpressionList (children 2)
          Literal \'World\'
          Literal UInt64_2
 Identifier enum_nested_alter