> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/reference/system-tables/sys-schema/sys-schema-stored-functions/ps_thread_id.md).

# ps\_thread\_id

{% hint style="info" %}
Sys Schema is available from MariaDB 10.6.
{% endhint %}

## Syntax

```
sys.ps_thread_id(connection_id)
```

## Description

`ps_thread_id` is a [stored function](/docs/server/server-usage/stored-routines/stored-functions.md) available with the [Sys Schema](/docs/server/reference/system-tables/sys-schema.md) that returns the thread\_id associated with the given *connection\_id*. If the *connection\_id* is `NULL`, returns the thread\_id for the current connection.

## Examples

```sql
SELECT * FROM performance_schema.threads\G
*************************** 13. row ***************************
          THREAD_ID: 13
               NAME: thread/sql/one_connection
               TYPE: FOREGROUND
     PROCESSLIST_ID: 3
   PROCESSLIST_USER: msandbox
   PROCESSLIST_HOST: localhost
     PROCESSLIST_DB: test
PROCESSLIST_COMMAND: Query
   PROCESSLIST_TIME: 0
  PROCESSLIST_STATE: Sending data
   PROCESSLIST_INFO: SELECT * FROM performance_schema.threads
   PARENT_THREAD_ID: 1
               ROLE: NULL
       INSTRUMENTED: YES
            HISTORY: YES
    CONNECTION_TYPE: Socket
       THREAD_OS_ID: 24379


SELECT sys.ps_thread_id(3);
+---------------------+
| sys.ps_thread_id(3) |
+---------------------+
|                  13 |
+---------------------+

SELECT sys.ps_thread_id(NULL);
+------------------------+
| sys.ps_thread_id(NULL) |
+------------------------+
|                     13 |
+------------------------+
```

<sub>*This page is licensed: CC BY-SA / Gnu FDL*</sub>

{% @marketo/form formId="4316" %}


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