The cancel operator cancels a running query.

Synopsis

cancel( query_id )

Summary

The cancel operator cancels and aborts a currently running query by query id.  Obtain the query id value from the SciDB log or via the list('queries') command. SciDB maintains query context information for each completed and in-progress query in the server. If you issue a Ctrl+C or abort from the iquery client, SciDB aborts the query aborts and removes its context from the server.

In Enterprise Edition /wiki/spaces/SD/pages/242909404, administrative privileges are required to cancel the queries of other users.