> 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/connectors/mariadb-connector-c/api-functions/mysql_thread_id.md).

# mysql\_thread\_id

## Syntax

```c
unsigned long mysql_thread_id(MYSQL * mysql);
```

## Parameter

* `mysql` - a mysql handle, which was previously allocated by [mysql\_init()](/docs/connectors/mariadb-connector-c/api-functions/mysql_init.md) or [mysql\_real\_connect()](/docs/connectors/mariadb-connector-c/api-functions/mysql_real_connect.md).

## Description

The `mysql_thread_id()` function returns the thread id for the current connection.

{% hint style="info" %}
The current connection can be killed with [mysql\_kill()](/docs/connectors/mariadb-connector-c/api-functions/mysql_kill.md). If reconnect option is enabled the thread id might change if the client reconnects to the server.
{% endhint %}

## See Also

* [mysql\_kill()](/docs/connectors/mariadb-connector-c/api-functions/mysql_kill.md)
* [mysql\_options()](/docs/connectors/mariadb-connector-c/api-functions/mysql_options.md)

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