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\$1S3CLIENT
<a name="r_STL_S3CLIENT"></a>

Records transfer time and other performance metrics.

Use the STL\$1S3CLIENT table to find the time spent transferring data from Amazon S3.

STL\$1S3CLIENT 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="r_STL_S3CLIENT-table-columns2"></a>

[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/redshift/latest/dg/r_STL_S3CLIENT.html)

## Sample query
<a name="r_STL_S3CLIENT-sample-query2"></a>

The following query returns the time taken to load files using a COPY command.

```
select slice, key, transfer_time 
from stl_s3client 
where query = pg_last_copy_id();
```

Result

```
 slice |   key                       | transfer_time
 ------+-----------------------------+---------------
     0 | listing10M0003_part_00      |    16626716
     1 | listing10M0001_part_00      |    12894494
     2 | listing10M0002_part_00      |    14320978
     3 | listing10M0000_part_00      |    11293439
  3371 | prefix=listing10M;marker=   |       99395
```

The following query converts the `start_time` and `end_time` to a timestamp. 

```
select userid,query,slice,pid,recordtime,start_time,end_time,
'2000-01-01'::timestamp + (start_time/1000000.0)* interval '1 second' as start_ts,
'2000-01-01'::timestamp + (end_time/1000000.0)* interval '1 second' as end_ts 
from stl_s3client where query> -1 limit 5;
```

```
 userid | query | slice |  pid  |         recordtime         |   start_time    |    end_time     |          start_ts          |           end_ts           
--------+-------+-------+-------+----------------------------+-----------------+-----------------+----------------------------+----------------------------
      0 |     0 |     0 | 23449 | 2019-07-14 16:27:17.207839 | 616436837154256 | 616436837207838 | 2019-07-14 16:27:17.154256 | 2019-07-14 16:27:17.207838
      0 |     0 |     0 | 23449 | 2019-07-14 16:27:17.252521 | 616436837208208 | 616436837252520 | 2019-07-14 16:27:17.208208 | 2019-07-14 16:27:17.25252
      0 |     0 |     0 | 23449 | 2019-07-14 16:27:17.284376 | 616436837208460 | 616436837284374 | 2019-07-14 16:27:17.20846  | 2019-07-14 16:27:17.284374
      0 |     0 |     0 | 23449 | 2019-07-14 16:27:17.285307 | 616436837208980 | 616436837285306 | 2019-07-14 16:27:17.20898  | 2019-07-14 16:27:17.285306
      0 |     0 |     0 | 23449 | 2019-07-14 16:27:17.353853 | 616436837302216 | 616436837353851 | 2019-07-14 16:27:17.302216 | 2019-07-14 16:27:17.353851
```