---
title: Frequently Asked Questions
date: "2026-01-29"
vignette: >
  %\VignetteIndexEntry{Frequently Asked Questions}
  %\VignetteEngine{litedown::vignette}
  %\VignetteEncoding{UTF-8}
---



**R6.tiledb FAQ**

***


#### 1. How can I get the underlying object from `TileDBArray` and `TileDBGroup`?
  
  Both classes have an active binding field `$object` that gives access to underlying
  tiledb object, i.e., either `tiledb_array()` or `tiledb_group()` objects.
  
  Note that with `TileDBArray` you can also use the `$tiledb_array()` method that gives
  access to a separate array handle.


#### 2. How can I use time-travelling feature?
  
  Use either `tiledb_timestamp` argument at instantiation of `TileDBArray` and `TileDBGroup` classes or their mutable active field `tiledb_timestamp`. These options work for read mode only.
  
  For writing commits at arbitrary point in time, use `open_write()` and for metadata use `set_metadata()` method with its `timestamp` argument.
  
#### 3. How can I see the last commit?

Use `$get_last_ifragments()` method:


``` r
# array uri
uri <- "array path here"

# instantiate TileDBFragments
fobj <- tdb_fragments(uri)

# last i fragments
fobj$get_last_ifragments(1)
```