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\_SESSIONS
<a name="r_STL_SESSIONS"></a>

Returns information about user session history.

STL\_SESSIONS differs from STV\_SESSIONS in that STL\_SESSIONS contains session history, where STV\_SESSIONS contains the current active sessions.

STL\_SESSIONS 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\_SESSION\_HISTORY](SYS_SESSION_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_SESSIONS-table-columns"></a>


| Column name | Data type | Description | 
| --- | --- | --- | 
| userid | integer | ID of the user who generated the entry. | 
| starttime | timestamp | Time in UTC that the session started. | 
| endtime | timestamp | Time in UTC that the session ended. | 
| process | integer | Process ID for the session. | 
| user\_name | character(50) | User name associated with the session. | 
| db\_name | character(50) | Name of the database associated with the session. | 
| timeout\_sec | int | The maximum time in seconds that a session remains inactive or idle before timing out. 0 indicates that no timeout is set. | 
| timed\_out | int | A value that indicates why the connection was terminated. It can have the following values:[See the AWS documentation website for more details](http://docs.aws.amazon.com/redshift/latest/dg/r_STL_SESSIONS.html) | 

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

To view session history for the TICKIT database, type the following query:

```
select starttime, process, user_name, timeout_sec, timed_out
from stl_sessions
where db_name='tickit' order by starttime;
```

This query returns the following sample output:

```
    starttime              | process |  user_name             | timeout_sec | timed_out
---------------------------+---------+------------------------+-------------+-------------
2008-09-15 09:54:06.746705 |   32358 | dwuser                 | 120         | 1
2008-09-15 09:56:34.30275  |   32744 | dwuser                 | 60          | 1
2008-09-15 11:20:34.694837 |   14906 | dwuser                 | 0           | 0
2008-09-15 11:22:16.749818 |   15148 | dwuser                 | 0           | 0
2008-09-15 14:32:44.66112  |   14031 | dwuser                 | 0           | 0
2008-09-15 14:56:30.22161  |   18380 | dwuser                 | 0           | 0
2008-09-15 15:28:32.509354 |   24344 | dwuser                 | 0           | 0
2008-09-15 16:01:00.557326 |   30153 | dwuser                 | 120         | 1
2008-09-15 17:28:21.419858 |   12805 | dwuser                 | 0           | 0
2008-09-15 20:58:37.601937 |   14951 | dwuser                 | 60          | 1
2008-09-16 11:12:30.960564 |   27437 | dwuser                 | 60          | 1
2008-09-16 14:11:37.639092 |   23790 | dwuser                 | 3600        | 1
2008-09-16 15:13:46.02195  |    1355 | dwuser                 | 120         | 1
2008-09-16 15:22:36.515106 |    2878 | dwuser                 | 120         | 1
2008-09-16 15:44:39.194579 |    6470 | dwuser                 | 120         | 1
2008-09-16 16:50:27.02138  |   17254 | dwuser                 | 120         | 1
2008-09-17 12:05:02.157208 |    8439 | dwuser                 | 3600        | 0
(17 rows)
```