AlterQuery  test (children 2)
 ExpressionList (children 1)
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration my.tuple (children 1)
    DataType Tuple (children 1)
     ExpressionList (children 2)
      NameTypePair a (children 1)
       DataType UInt32
      NameTypePair b (children 1)
       DataType UInt32
 Identifier test
