# 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" %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://mariadb.com/docs/server/reference/system-tables/sys-schema/sys-schema-stored-functions/ps_thread_id.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.