Getting more details on column types

[tientt-holistics]

Using Clickhouse client API, with the current interface, we can only get the database type as a String.
However there are cases we want to get more details about the data type such as Precision, Scale for Decimal, Precision for Datetime,...

conn, err := clickhouse.Open(&clickhouse.Options{
  Addr: []string{"127.0.0.1:9000"},
  Auth: clickhouse.Auth{
	  Database: "",
	  Username: "",
	  Password: "",
  },
  //Debug:           true,
  DialTimeout:     time.Second,
  MaxOpenConns:    10,
  MaxIdleConns:    5,
  ConnMaxLifetime: time.Hour,
  })
  rows, err := conn.Query(context.Background(), `SELECT toInt8(0), toDecimal32(2, 4), toDateTime64(1546300800.123, 3)`)
  columnTypes := rows.ColumnTypes()
}

When using VSCode debugger, I can see that information exist in block.Columns.

Is there any way to access this information?