What procedures you can call safely

You can safely use IQ UTILITIES to create your own versions of documented system procedures that report on information in the database. For example, sp_iqspaceused displays information about used and available space available in the IQ Main and IQ Temporary Stores. Check the owner of the procedure you create from a system stored procedure to be sure your version of the procedure has the correct owner.

Do not attempt to create your own versions of system procedures that control IQ or multiplex operations. Multiplex administration is only supported through Sybase Central. Modifying procedures that control IQ operations can lead to serious problems.