AlterQuery  t_sparse_mutations_5 (children 2)
 ExpressionList (children 1)
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration t (children 1)
    DataType Tuple (children 1)
     ExpressionList (children 2)
      DataType UInt64
      DataType String
 Identifier t_sparse_mutations_5
