AlterQuery  test_table (children 2)
 ExpressionList (children 1)
  AlterCommand ADD_COLUMN (children 1)
   ColumnDeclaration array (children 2)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType UInt8
    Literal Array_[UInt64_1, UInt64_2, UInt64_3]
 Identifier test_table