# mysql\_kill

## Syntax

```c
int mysql_kill(MYSQL * mysql,
               unsigned long);
```

* `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).
* `long` - process id

## Description

This function is used to ask the server to kill a MariaDB thread specified by the processid parameter. This value must be retrieved by [SHOW PROCESSLIST](/docs/server/reference/sql-statements/administrative-sql-statements/show/show-processlist.md). If trying to kill the own connection [mysql\_thread\_id()](/docs/connectors/mariadb-connector-c/api-functions/mysql_thread_id.md) should be used.

Returns 0 on success, otherwise nonzero.

{% hint style="info" %}
To stop a running command without killing the connection, use [KILL QUERY](/docs/server/reference/sql-statements/administrative-sql-statements/kill.md). The `mysql_kill()` function only kills a connection; it doesn't free any memory - this must be done explicitly by calling [mysql\_close()](/docs/connectors/mariadb-connector-c/api-functions/mysql_close.md).
{% endhint %}

## See also

* [mysql\_thread\_id()](/docs/connectors/mariadb-connector-c/api-functions/mysql_thread_id.md)
* [mysql\_close()](/docs/connectors/mariadb-connector-c/api-functions/mysql_close.md)
* [mariadb\_cancel()](/docs/connectors/mariadb-connector-c/api-functions/mariadb_cancel.md)

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


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