Amazon Redshift will no longer support the creation of new Python UDFs starting Patch 198. Existing Python UDFs will continue to function until June 30, 2026. For more information, see the [ blog post ](https://aws.amazon.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/). 

# STL\$1UNDONE
<a name="r_STL_UNDONE"></a>

Displays information about transactions that have been undone.

STL\$1UNDONE is visible to all users. Superusers can see all rows; regular users can see only their own data. For more information, see [Visibility of data in system tables and views](cm_chap_system-tables.md#c_visibility-of-data).

Some or all of the data in this table can also be found in the SYS monitoring view [SYS\$1TRANSACTION\$1HISTORY](SYS_TRANSACTION_HISTORY.md). The data in the SYS monitoring view is formatted to be easier to use and understand. We recommend that you use the SYS monitoring view for your queries.

## Table columns
<a name="r_STL_UNDONE-table-columns"></a>

[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/redshift/latest/dg/r_STL_UNDONE.html)

## Sample query
<a name="r_STL_UNDONE-sample-query"></a>

To view a concise log of all undone transactions, type the following command: 

```
select xact_id, xact_id_undone, table_id from stl_undone;
```

This command returns the following sample output: 

```
 xact_id | xact_id_undone | table_id
---------+----------------+----------
1344 |           1344 |   100192
1326 |           1326 |   100192
1551 |           1551 |   100192
(3 rows)
```