AlterQuery  non_metadata_alters (children 2)
 ExpressionList (children 1)
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration value2 (children 1)
    DataType Enum8 (children 1)
     ExpressionList (children 3)
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'Hello\'
        Literal UInt64_1
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'World\'
        Literal UInt64_2
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'!\'
        Literal UInt64_3
 Identifier non_metadata_alters
