How You Can Control Query Tracing and Execution
When the Trace Log portlet on the Debug tab is selected, the Run, Trace Log menu lets you control query tracing and query execution plan tracing.
The following options are available on the Run, Trace Log menu:
PrintQry on 'Go'
Issues a set printqry statement when you start the application
QEP on 'Go'
Issues a set qep statement when you start the application
No PrintQry
Issues a set noprintqry statement while the application is running
No QEP
Issues a set noqep statement while the application is running