|-
| '''Errors'''
|{{Error|overflow|#Errors}} Query execution is rejected, because too many jobs are queued or being executed. <br/>{{Error|id|#Errors}} The specified id is invalid or has already been assigned.
|-
| '''Examples'''
|
* Schedule a second query that will notify the client 10 seconds later that a message was processed 10 seconds later:
<pre class='brush:xquery'>
declare