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\$1DETAIL
Use SYS\$1UNLOAD\$1DETAIL to view details of an UNLOAD operation. It records one row for each file created by an UNLOAD statement. For example, if an UNLOAD creates 12 files, SYS\$1UNLOAD\$1DETAIL will contain 12 corresponding rows.
SYS\$1UNLOAD\$1DETAIL 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
[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/redshift/latest/dg/SYS_UNLOAD_DETAIL.html)
## Sample queries
The following query shows the unloaded query details, including format, rows, and file count of unload command.
```
select query_id, substring(file_name, 0, 50), transfer_size, file_format from sys_unload_detail;
```
Sample output.
```
query_id | substring | transfer_size | file_format
----------+-------------------------------------------------------------+---------------+-------------
9272 | s3://amzn-s3-demo-bucket/my_unload_doc_venue0000_part_00.gz | 395886 | Text
9272 | s3://amzn-s3-demo-bucket/my_unload_doc_venue0001_part_00.gz | 406444 | Text
9272 | s3://amzn-s3-demo-bucket/my_unload_doc_venue0002_part_00.gz | 409431 | Text
9272 | s3://amzn-s3-demo-bucket/my_unload_doc_venue0003_part_00.gz | 403051 | Text
9272 | s3://amzn-s3-demo-bucket/my_unload_doc_venue0004_part_00.gz | 413592 | Text
9272 | s3://amzn-s3-demo-bucket/my_unload_doc_venue0005_part_00.gz | 395689 | Text
(6 rows)
```