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/). 

# SYS\$1UNLOAD\$1HISTORY
<a name="SYS_UNLOAD_HISTORY"></a>

Use SYS\$1UNLOAD\$1HISTORY to view details of UNLOAD commands. Each row represents a UNLOAD command with accumulated statistics for some of the fields. It contains both running and finished UNLOAD commands.

SYS\$1UNLOAD\$1HISTORY 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).

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

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

## Sample queries
<a name="SYS_UNLOAD_HISTORY-sample-queries"></a>

The following query shows the unloaded query details, including format, rows, and file count of unload command.

```
SELECT query_id,
       file_format,
       start_time,
       duration,
       unloaded_rows,
       unloaded_files_count
FROM sys_unload_history
ORDER BY query_id,
file_format limit 100;
```

Sample output.

```
 query_id | file_format |         start_time         | duration | unloaded_rows | unloaded_files_count
----------+-------------+----------------------------+----------+---------------+----------------------
   527067 | Text        | 2022-02-09 05:18:35.844452 |  5932478 |            10 |                    1
```